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1/*
2 * Copyright © 2013 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Author: Jani Nikula <jani.nikula@intel.com>
24 */
25
26#include <drm/drmP.h>
27#include <drm/drm_atomic_helper.h>
28#include <drm/drm_crtc.h>
29#include <drm/drm_edid.h>
30#include <drm/i915_drm.h>
31#include <drm/drm_panel.h>
32#include <drm/drm_mipi_dsi.h>
33#include <linux/slab.h>
34#include <linux/gpio/consumer.h>
35#include "i915_drv.h"
36#include "intel_drv.h"
37#include "intel_dsi.h"
38
39static const struct {
40 u16 panel_id;
41 struct drm_panel * (*init)(struct intel_dsi *intel_dsi, u16 panel_id);
42} intel_dsi_drivers[] = {
43 {
44 .panel_id = MIPI_DSI_GENERIC_PANEL_ID,
45 .init = vbt_panel_init,
46 },
47};
48
49static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
50{
51 struct drm_encoder *encoder = &intel_dsi->base.base;
52 struct drm_device *dev = encoder->dev;
53 struct drm_i915_private *dev_priv = dev->dev_private;
54 u32 mask;
55
56 mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
57 LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
58
59 if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & mask) == mask, 100))
60 DRM_ERROR("DPI FIFOs are not empty\n");
61}
62
63static void write_data(struct drm_i915_private *dev_priv,
64 i915_reg_t reg,
65 const u8 *data, u32 len)
66{
67 u32 i, j;
68
69 for (i = 0; i < len; i += 4) {
70 u32 val = 0;
71
72 for (j = 0; j < min_t(u32, len - i, 4); j++)
73 val |= *data++ << 8 * j;
74
75 I915_WRITE(reg, val);
76 }
77}
78
79static void read_data(struct drm_i915_private *dev_priv,
80 i915_reg_t reg,
81 u8 *data, u32 len)
82{
83 u32 i, j;
84
85 for (i = 0; i < len; i += 4) {
86 u32 val = I915_READ(reg);
87
88 for (j = 0; j < min_t(u32, len - i, 4); j++)
89 *data++ = val >> 8 * j;
90 }
91}
92
93static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host,
94 const struct mipi_dsi_msg *msg)
95{
96 struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host);
97 struct drm_device *dev = intel_dsi_host->intel_dsi->base.base.dev;
98 struct drm_i915_private *dev_priv = dev->dev_private;
99 enum port port = intel_dsi_host->port;
100 struct mipi_dsi_packet packet;
101 ssize_t ret;
102 const u8 *header, *data;
103 i915_reg_t data_reg, ctrl_reg;
104 u32 data_mask, ctrl_mask;
105
106 ret = mipi_dsi_create_packet(&packet, msg);
107 if (ret < 0)
108 return ret;
109
110 header = packet.header;
111 data = packet.payload;
112
113 if (msg->flags & MIPI_DSI_MSG_USE_LPM) {
114 data_reg = MIPI_LP_GEN_DATA(port);
115 data_mask = LP_DATA_FIFO_FULL;
116 ctrl_reg = MIPI_LP_GEN_CTRL(port);
117 ctrl_mask = LP_CTRL_FIFO_FULL;
118 } else {
119 data_reg = MIPI_HS_GEN_DATA(port);
120 data_mask = HS_DATA_FIFO_FULL;
121 ctrl_reg = MIPI_HS_GEN_CTRL(port);
122 ctrl_mask = HS_CTRL_FIFO_FULL;
123 }
124
125 /* note: this is never true for reads */
126 if (packet.payload_length) {
127
128 if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & data_mask) == 0, 50))
129 DRM_ERROR("Timeout waiting for HS/LP DATA FIFO !full\n");
130
131 write_data(dev_priv, data_reg, packet.payload,
132 packet.payload_length);
133 }
134
135 if (msg->rx_len) {
136 I915_WRITE(MIPI_INTR_STAT(port), GEN_READ_DATA_AVAIL);
137 }
138
139 if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & ctrl_mask) == 0, 50)) {
140 DRM_ERROR("Timeout waiting for HS/LP CTRL FIFO !full\n");
141 }
142
143 I915_WRITE(ctrl_reg, header[2] << 16 | header[1] << 8 | header[0]);
144
145 /* ->rx_len is set only for reads */
146 if (msg->rx_len) {
147 data_mask = GEN_READ_DATA_AVAIL;
148 if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & data_mask) == data_mask, 50))
149 DRM_ERROR("Timeout waiting for read data.\n");
150
151 read_data(dev_priv, data_reg, msg->rx_buf, msg->rx_len);
152 }
153
154 /* XXX: fix for reads and writes */
155 return 4 + packet.payload_length;
156}
157
158static int intel_dsi_host_attach(struct mipi_dsi_host *host,
159 struct mipi_dsi_device *dsi)
160{
161 return 0;
162}
163
164static int intel_dsi_host_detach(struct mipi_dsi_host *host,
165 struct mipi_dsi_device *dsi)
166{
167 return 0;
168}
169
170static const struct mipi_dsi_host_ops intel_dsi_host_ops = {
171 .attach = intel_dsi_host_attach,
172 .detach = intel_dsi_host_detach,
173 .transfer = intel_dsi_host_transfer,
174};
175
176static struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
177 enum port port)
178{
179 struct intel_dsi_host *host;
180 struct mipi_dsi_device *device;
181
182 host = kzalloc(sizeof(*host), GFP_KERNEL);
183 if (!host)
184 return NULL;
185
186 host->base.ops = &intel_dsi_host_ops;
187 host->intel_dsi = intel_dsi;
188 host->port = port;
189
190 /*
191 * We should call mipi_dsi_host_register(&host->base) here, but we don't
192 * have a host->dev, and we don't have OF stuff either. So just use the
193 * dsi framework as a library and hope for the best. Create the dsi
194 * devices by ourselves here too. Need to be careful though, because we
195 * don't initialize any of the driver model devices here.
196 */
197 device = kzalloc(sizeof(*device), GFP_KERNEL);
198 if (!device) {
199 kfree(host);
200 return NULL;
201 }
202
203 device->host = &host->base;
204 host->device = device;
205
206 return host;
207}
208
209/*
210 * send a video mode command
211 *
212 * XXX: commands with data in MIPI_DPI_DATA?
213 */
214static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs,
215 enum port port)
216{
217 struct drm_encoder *encoder = &intel_dsi->base.base;
218 struct drm_device *dev = encoder->dev;
219 struct drm_i915_private *dev_priv = dev->dev_private;
220 u32 mask;
221
222 /* XXX: pipe, hs */
223 if (hs)
224 cmd &= ~DPI_LP_MODE;
225 else
226 cmd |= DPI_LP_MODE;
227
228 /* clear bit */
229 I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);
230
231 /* XXX: old code skips write if control unchanged */
232 if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
233 DRM_ERROR("Same special packet %02x twice in a row.\n", cmd);
234
235 I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
236
237 mask = SPL_PKT_SENT_INTERRUPT;
238 if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & mask) == mask, 100))
239 DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
240
241 return 0;
242}
243
244static void band_gap_reset(struct drm_i915_private *dev_priv)
245{
246 mutex_lock(&dev_priv->sb_lock);
247
248 vlv_flisdsi_write(dev_priv, 0x08, 0x0001);
249 vlv_flisdsi_write(dev_priv, 0x0F, 0x0005);
250 vlv_flisdsi_write(dev_priv, 0x0F, 0x0025);
251 udelay(150);
252 vlv_flisdsi_write(dev_priv, 0x0F, 0x0000);
253 vlv_flisdsi_write(dev_priv, 0x08, 0x0000);
254
255 mutex_unlock(&dev_priv->sb_lock);
256}
257
258static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
259{
260 return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE;
261}
262
263static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
264{
265 return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE;
266}
267
268static bool intel_dsi_compute_config(struct intel_encoder *encoder,
269 struct intel_crtc_state *pipe_config)
270{
271 struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi,
272 base);
273 struct intel_connector *intel_connector = intel_dsi->attached_connector;
274 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
275 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
276
277 DRM_DEBUG_KMS("\n");
278
279 pipe_config->has_dsi_encoder = true;
280
281 if (fixed_mode)
282 intel_fixed_panel_mode(fixed_mode, adjusted_mode);
283
284 /* DSI uses short packets for sync events, so clear mode flags for DSI */
285 adjusted_mode->flags = 0;
286
287 return true;
288}
289
290static void bxt_dsi_device_ready(struct intel_encoder *encoder)
291{
292 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
293 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
294 enum port port;
295 u32 val;
296
297 DRM_DEBUG_KMS("\n");
298
299 /* Exit Low power state in 4 steps*/
300 for_each_dsi_port(port, intel_dsi->ports) {
301
302 /* 1. Enable MIPI PHY transparent latch */
303 val = I915_READ(BXT_MIPI_PORT_CTRL(port));
304 I915_WRITE(BXT_MIPI_PORT_CTRL(port), val | LP_OUTPUT_HOLD);
305 usleep_range(2000, 2500);
306
307 /* 2. Enter ULPS */
308 val = I915_READ(MIPI_DEVICE_READY(port));
309 val &= ~ULPS_STATE_MASK;
310 val |= (ULPS_STATE_ENTER | DEVICE_READY);
311 I915_WRITE(MIPI_DEVICE_READY(port), val);
312 usleep_range(2, 3);
313
314 /* 3. Exit ULPS */
315 val = I915_READ(MIPI_DEVICE_READY(port));
316 val &= ~ULPS_STATE_MASK;
317 val |= (ULPS_STATE_EXIT | DEVICE_READY);
318 I915_WRITE(MIPI_DEVICE_READY(port), val);
319 usleep_range(1000, 1500);
320
321 /* Clear ULPS and set device ready */
322 val = I915_READ(MIPI_DEVICE_READY(port));
323 val &= ~ULPS_STATE_MASK;
324 val |= DEVICE_READY;
325 I915_WRITE(MIPI_DEVICE_READY(port), val);
326 }
327}
328
329static void vlv_dsi_device_ready(struct intel_encoder *encoder)
330{
331 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
332 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
333 enum port port;
334 u32 val;
335
336 DRM_DEBUG_KMS("\n");
337
338 mutex_lock(&dev_priv->sb_lock);
339 /* program rcomp for compliance, reduce from 50 ohms to 45 ohms
340 * needed everytime after power gate */
341 vlv_flisdsi_write(dev_priv, 0x04, 0x0004);
342 mutex_unlock(&dev_priv->sb_lock);
343
344 /* bandgap reset is needed after everytime we do power gate */
345 band_gap_reset(dev_priv);
346
347 for_each_dsi_port(port, intel_dsi->ports) {
348
349 I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_ENTER);
350 usleep_range(2500, 3000);
351
352 /* Enable MIPI PHY transparent latch
353 * Common bit for both MIPI Port A & MIPI Port C
354 * No similar bit in MIPI Port C reg
355 */
356 val = I915_READ(MIPI_PORT_CTRL(PORT_A));
357 I915_WRITE(MIPI_PORT_CTRL(PORT_A), val | LP_OUTPUT_HOLD);
358 usleep_range(1000, 1500);
359
360 I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_EXIT);
361 usleep_range(2500, 3000);
362
363 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY);
364 usleep_range(2500, 3000);
365 }
366}
367
368static void intel_dsi_device_ready(struct intel_encoder *encoder)
369{
370 struct drm_device *dev = encoder->base.dev;
371
372 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
373 vlv_dsi_device_ready(encoder);
374 else if (IS_BROXTON(dev))
375 bxt_dsi_device_ready(encoder);
376}
377
378static void intel_dsi_port_enable(struct intel_encoder *encoder)
379{
380 struct drm_device *dev = encoder->base.dev;
381 struct drm_i915_private *dev_priv = dev->dev_private;
382 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
383 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
384 enum port port;
385
386 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
387 u32 temp;
388
389 temp = I915_READ(VLV_CHICKEN_3);
390 temp &= ~PIXEL_OVERLAP_CNT_MASK |
391 intel_dsi->pixel_overlap <<
392 PIXEL_OVERLAP_CNT_SHIFT;
393 I915_WRITE(VLV_CHICKEN_3, temp);
394 }
395
396 for_each_dsi_port(port, intel_dsi->ports) {
397 i915_reg_t port_ctrl = IS_BROXTON(dev) ?
398 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
399 u32 temp;
400
401 temp = I915_READ(port_ctrl);
402
403 temp &= ~LANE_CONFIGURATION_MASK;
404 temp &= ~DUAL_LINK_MODE_MASK;
405
406 if (intel_dsi->ports == ((1 << PORT_A) | (1 << PORT_C))) {
407 temp |= (intel_dsi->dual_link - 1)
408 << DUAL_LINK_MODE_SHIFT;
409 temp |= intel_crtc->pipe ?
410 LANE_CONFIGURATION_DUAL_LINK_B :
411 LANE_CONFIGURATION_DUAL_LINK_A;
412 }
413 /* assert ip_tg_enable signal */
414 I915_WRITE(port_ctrl, temp | DPI_ENABLE);
415 POSTING_READ(port_ctrl);
416 }
417}
418
419static void intel_dsi_port_disable(struct intel_encoder *encoder)
420{
421 struct drm_device *dev = encoder->base.dev;
422 struct drm_i915_private *dev_priv = dev->dev_private;
423 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
424 enum port port;
425
426 for_each_dsi_port(port, intel_dsi->ports) {
427 i915_reg_t port_ctrl = IS_BROXTON(dev) ?
428 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
429 u32 temp;
430
431 /* de-assert ip_tg_enable signal */
432 temp = I915_READ(port_ctrl);
433 I915_WRITE(port_ctrl, temp & ~DPI_ENABLE);
434 POSTING_READ(port_ctrl);
435 }
436}
437
438static void intel_dsi_enable(struct intel_encoder *encoder)
439{
440 struct drm_device *dev = encoder->base.dev;
441 struct drm_i915_private *dev_priv = dev->dev_private;
442 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
443 enum port port;
444
445 DRM_DEBUG_KMS("\n");
446
447 if (is_cmd_mode(intel_dsi)) {
448 for_each_dsi_port(port, intel_dsi->ports)
449 I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(port), 8 * 4);
450 } else {
451 msleep(20); /* XXX */
452 for_each_dsi_port(port, intel_dsi->ports)
453 dpi_send_cmd(intel_dsi, TURN_ON, false, port);
454 msleep(100);
455
456 drm_panel_enable(intel_dsi->panel);
457
458 for_each_dsi_port(port, intel_dsi->ports)
459 wait_for_dsi_fifo_empty(intel_dsi, port);
460
461 intel_dsi_port_enable(encoder);
462 }
463
464 intel_panel_enable_backlight(intel_dsi->attached_connector);
465}
466
467static void intel_dsi_prepare(struct intel_encoder *intel_encoder);
468
469static void intel_dsi_pre_enable(struct intel_encoder *encoder)
470{
471 struct drm_device *dev = encoder->base.dev;
472 struct drm_i915_private *dev_priv = dev->dev_private;
473 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
474 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
475 enum pipe pipe = intel_crtc->pipe;
476 enum port port;
477 u32 tmp;
478
479 DRM_DEBUG_KMS("\n");
480
481 intel_enable_dsi_pll(encoder);
482 intel_dsi_prepare(encoder);
483
484 /* Panel Enable over CRC PMIC */
485 if (intel_dsi->gpio_panel)
486 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
487
488 msleep(intel_dsi->panel_on_delay);
489
490 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
491 /*
492 * Disable DPOunit clock gating, can stall pipe
493 * and we need DPLL REFA always enabled
494 */
495 tmp = I915_READ(DPLL(pipe));
496 tmp |= DPLL_REF_CLK_ENABLE_VLV;
497 I915_WRITE(DPLL(pipe), tmp);
498
499 /* update the hw state for DPLL */
500 intel_crtc->config->dpll_hw_state.dpll =
501 DPLL_INTEGRATED_REF_CLK_VLV |
502 DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
503
504 tmp = I915_READ(DSPCLK_GATE_D);
505 tmp |= DPOUNIT_CLOCK_GATE_DISABLE;
506 I915_WRITE(DSPCLK_GATE_D, tmp);
507 }
508
509 /* put device in ready state */
510 intel_dsi_device_ready(encoder);
511
512 drm_panel_prepare(intel_dsi->panel);
513
514 for_each_dsi_port(port, intel_dsi->ports)
515 wait_for_dsi_fifo_empty(intel_dsi, port);
516
517 /* Enable port in pre-enable phase itself because as per hw team
518 * recommendation, port should be enabled befor plane & pipe */
519 intel_dsi_enable(encoder);
520}
521
522static void intel_dsi_enable_nop(struct intel_encoder *encoder)
523{
524 DRM_DEBUG_KMS("\n");
525
526 /* for DSI port enable has to be done before pipe
527 * and plane enable, so port enable is done in
528 * pre_enable phase itself unlike other encoders
529 */
530}
531
532static void intel_dsi_pre_disable(struct intel_encoder *encoder)
533{
534 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
535 enum port port;
536
537 DRM_DEBUG_KMS("\n");
538
539 intel_panel_disable_backlight(intel_dsi->attached_connector);
540
541 if (is_vid_mode(intel_dsi)) {
542 /* Send Shutdown command to the panel in LP mode */
543 for_each_dsi_port(port, intel_dsi->ports)
544 dpi_send_cmd(intel_dsi, SHUTDOWN, false, port);
545 msleep(10);
546 }
547}
548
549static void intel_dsi_disable(struct intel_encoder *encoder)
550{
551 struct drm_device *dev = encoder->base.dev;
552 struct drm_i915_private *dev_priv = dev->dev_private;
553 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
554 enum port port;
555 u32 temp;
556
557 DRM_DEBUG_KMS("\n");
558
559 if (is_vid_mode(intel_dsi)) {
560 for_each_dsi_port(port, intel_dsi->ports)
561 wait_for_dsi_fifo_empty(intel_dsi, port);
562
563 intel_dsi_port_disable(encoder);
564 msleep(2);
565 }
566
567 for_each_dsi_port(port, intel_dsi->ports) {
568 /* Panel commands can be sent when clock is in LP11 */
569 I915_WRITE(MIPI_DEVICE_READY(port), 0x0);
570
571 intel_dsi_reset_clocks(encoder, port);
572 I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP);
573
574 temp = I915_READ(MIPI_DSI_FUNC_PRG(port));
575 temp &= ~VID_MODE_FORMAT_MASK;
576 I915_WRITE(MIPI_DSI_FUNC_PRG(port), temp);
577
578 I915_WRITE(MIPI_DEVICE_READY(port), 0x1);
579 }
580 /* if disable packets are sent before sending shutdown packet then in
581 * some next enable sequence send turn on packet error is observed */
582 drm_panel_disable(intel_dsi->panel);
583
584 for_each_dsi_port(port, intel_dsi->ports)
585 wait_for_dsi_fifo_empty(intel_dsi, port);
586}
587
588static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
589{
590 struct drm_device *dev = encoder->base.dev;
591 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
592 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
593 enum port port;
594
595 DRM_DEBUG_KMS("\n");
596 for_each_dsi_port(port, intel_dsi->ports) {
597 /* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */
598 i915_reg_t port_ctrl = IS_BROXTON(dev) ?
599 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(PORT_A);
600 u32 val;
601
602 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
603 ULPS_STATE_ENTER);
604 usleep_range(2000, 2500);
605
606 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
607 ULPS_STATE_EXIT);
608 usleep_range(2000, 2500);
609
610 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
611 ULPS_STATE_ENTER);
612 usleep_range(2000, 2500);
613
614 /* Wait till Clock lanes are in LP-00 state for MIPI Port A
615 * only. MIPI Port C has no similar bit for checking
616 */
617 if (wait_for(((I915_READ(port_ctrl) & AFE_LATCHOUT)
618 == 0x00000), 30))
619 DRM_ERROR("DSI LP not going Low\n");
620
621 /* Disable MIPI PHY transparent latch */
622 val = I915_READ(port_ctrl);
623 I915_WRITE(port_ctrl, val & ~LP_OUTPUT_HOLD);
624 usleep_range(1000, 1500);
625
626 I915_WRITE(MIPI_DEVICE_READY(port), 0x00);
627 usleep_range(2000, 2500);
628 }
629
630 intel_disable_dsi_pll(encoder);
631}
632
633static void intel_dsi_post_disable(struct intel_encoder *encoder)
634{
635 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
636 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
637
638 DRM_DEBUG_KMS("\n");
639
640 intel_dsi_disable(encoder);
641
642 intel_dsi_clear_device_ready(encoder);
643
644 if (!IS_BROXTON(dev_priv)) {
645 u32 val;
646
647 val = I915_READ(DSPCLK_GATE_D);
648 val &= ~DPOUNIT_CLOCK_GATE_DISABLE;
649 I915_WRITE(DSPCLK_GATE_D, val);
650 }
651
652 drm_panel_unprepare(intel_dsi->panel);
653
654 msleep(intel_dsi->panel_off_delay);
655 msleep(intel_dsi->panel_pwr_cycle_delay);
656
657 /* Panel Disable over CRC PMIC */
658 if (intel_dsi->gpio_panel)
659 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
660}
661
662static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
663 enum pipe *pipe)
664{
665 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
666 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
667 struct drm_device *dev = encoder->base.dev;
668 enum intel_display_power_domain power_domain;
669 enum port port;
670 bool ret;
671
672 DRM_DEBUG_KMS("\n");
673
674 power_domain = intel_display_port_power_domain(encoder);
675 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
676 return false;
677
678 ret = false;
679
680 /* XXX: this only works for one DSI output */
681 for_each_dsi_port(port, intel_dsi->ports) {
682 i915_reg_t ctrl_reg = IS_BROXTON(dev) ?
683 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
684 u32 dpi_enabled, func;
685
686 func = I915_READ(MIPI_DSI_FUNC_PRG(port));
687 dpi_enabled = I915_READ(ctrl_reg) & DPI_ENABLE;
688
689 /* Due to some hardware limitations on BYT, MIPI Port C DPI
690 * Enable bit does not get set. To check whether DSI Port C
691 * was enabled in BIOS, check the Pipe B enable bit
692 */
693 if (IS_VALLEYVIEW(dev) && port == PORT_C)
694 dpi_enabled = I915_READ(PIPECONF(PIPE_B)) &
695 PIPECONF_ENABLE;
696
697 if (dpi_enabled || (func & CMD_MODE_DATA_WIDTH_MASK)) {
698 if (I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY) {
699 *pipe = port == PORT_A ? PIPE_A : PIPE_B;
700 ret = true;
701
702 goto out;
703 }
704 }
705 }
706out:
707 intel_display_power_put(dev_priv, power_domain);
708
709 return ret;
710}
711
712static void intel_dsi_get_config(struct intel_encoder *encoder,
713 struct intel_crtc_state *pipe_config)
714{
715 u32 pclk;
716 DRM_DEBUG_KMS("\n");
717
718 pipe_config->has_dsi_encoder = true;
719
720 /*
721 * DPLL_MD is not used in case of DSI, reading will get some default value
722 * set dpll_md = 0
723 */
724 pipe_config->dpll_hw_state.dpll_md = 0;
725
726 pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp);
727 if (!pclk)
728 return;
729
730 pipe_config->base.adjusted_mode.crtc_clock = pclk;
731 pipe_config->port_clock = pclk;
732}
733
734static enum drm_mode_status
735intel_dsi_mode_valid(struct drm_connector *connector,
736 struct drm_display_mode *mode)
737{
738 struct intel_connector *intel_connector = to_intel_connector(connector);
739 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
740 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
741
742 DRM_DEBUG_KMS("\n");
743
744 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
745 DRM_DEBUG_KMS("MODE_NO_DBLESCAN\n");
746 return MODE_NO_DBLESCAN;
747 }
748
749 if (fixed_mode) {
750 if (mode->hdisplay > fixed_mode->hdisplay)
751 return MODE_PANEL;
752 if (mode->vdisplay > fixed_mode->vdisplay)
753 return MODE_PANEL;
754 if (fixed_mode->clock > max_dotclk)
755 return MODE_CLOCK_HIGH;
756 }
757
758 return MODE_OK;
759}
760
761/* return txclkesc cycles in terms of divider and duration in us */
762static u16 txclkesc(u32 divider, unsigned int us)
763{
764 switch (divider) {
765 case ESCAPE_CLOCK_DIVIDER_1:
766 default:
767 return 20 * us;
768 case ESCAPE_CLOCK_DIVIDER_2:
769 return 10 * us;
770 case ESCAPE_CLOCK_DIVIDER_4:
771 return 5 * us;
772 }
773}
774
775/* return pixels in terms of txbyteclkhs */
776static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
777 u16 burst_mode_ratio)
778{
779 return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
780 8 * 100), lane_count);
781}
782
783static void set_dsi_timings(struct drm_encoder *encoder,
784 const struct drm_display_mode *adjusted_mode)
785{
786 struct drm_device *dev = encoder->dev;
787 struct drm_i915_private *dev_priv = dev->dev_private;
788 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
789 enum port port;
790 unsigned int bpp = dsi_pixel_format_bpp(intel_dsi->pixel_format);
791 unsigned int lane_count = intel_dsi->lane_count;
792
793 u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
794
795 hactive = adjusted_mode->crtc_hdisplay;
796 hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay;
797 hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
798 hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end;
799
800 if (intel_dsi->dual_link) {
801 hactive /= 2;
802 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
803 hactive += intel_dsi->pixel_overlap;
804 hfp /= 2;
805 hsync /= 2;
806 hbp /= 2;
807 }
808
809 vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay;
810 vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
811 vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end;
812
813 /* horizontal values are in terms of high speed byte clock */
814 hactive = txbyteclkhs(hactive, bpp, lane_count,
815 intel_dsi->burst_mode_ratio);
816 hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio);
817 hsync = txbyteclkhs(hsync, bpp, lane_count,
818 intel_dsi->burst_mode_ratio);
819 hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio);
820
821 for_each_dsi_port(port, intel_dsi->ports) {
822 if (IS_BROXTON(dev)) {
823 /*
824 * Program hdisplay and vdisplay on MIPI transcoder.
825 * This is different from calculated hactive and
826 * vactive, as they are calculated per channel basis,
827 * whereas these values should be based on resolution.
828 */
829 I915_WRITE(BXT_MIPI_TRANS_HACTIVE(port),
830 adjusted_mode->crtc_hdisplay);
831 I915_WRITE(BXT_MIPI_TRANS_VACTIVE(port),
832 adjusted_mode->crtc_vdisplay);
833 I915_WRITE(BXT_MIPI_TRANS_VTOTAL(port),
834 adjusted_mode->crtc_vtotal);
835 }
836
837 I915_WRITE(MIPI_HACTIVE_AREA_COUNT(port), hactive);
838 I915_WRITE(MIPI_HFP_COUNT(port), hfp);
839
840 /* meaningful for video mode non-burst sync pulse mode only,
841 * can be zero for non-burst sync events and burst modes */
842 I915_WRITE(MIPI_HSYNC_PADDING_COUNT(port), hsync);
843 I915_WRITE(MIPI_HBP_COUNT(port), hbp);
844
845 /* vertical values are in terms of lines */
846 I915_WRITE(MIPI_VFP_COUNT(port), vfp);
847 I915_WRITE(MIPI_VSYNC_PADDING_COUNT(port), vsync);
848 I915_WRITE(MIPI_VBP_COUNT(port), vbp);
849 }
850}
851
852static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
853{
854 struct drm_encoder *encoder = &intel_encoder->base;
855 struct drm_device *dev = encoder->dev;
856 struct drm_i915_private *dev_priv = dev->dev_private;
857 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
858 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
859 const struct drm_display_mode *adjusted_mode = &intel_crtc->config->base.adjusted_mode;
860 enum port port;
861 unsigned int bpp = dsi_pixel_format_bpp(intel_dsi->pixel_format);
862 u32 val, tmp;
863 u16 mode_hdisplay;
864
865 DRM_DEBUG_KMS("pipe %c\n", pipe_name(intel_crtc->pipe));
866
867 mode_hdisplay = adjusted_mode->crtc_hdisplay;
868
869 if (intel_dsi->dual_link) {
870 mode_hdisplay /= 2;
871 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
872 mode_hdisplay += intel_dsi->pixel_overlap;
873 }
874
875 for_each_dsi_port(port, intel_dsi->ports) {
876 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
877 /*
878 * escape clock divider, 20MHz, shared for A and C.
879 * device ready must be off when doing this! txclkesc?
880 */
881 tmp = I915_READ(MIPI_CTRL(PORT_A));
882 tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
883 I915_WRITE(MIPI_CTRL(PORT_A), tmp |
884 ESCAPE_CLOCK_DIVIDER_1);
885
886 /* read request priority is per pipe */
887 tmp = I915_READ(MIPI_CTRL(port));
888 tmp &= ~READ_REQUEST_PRIORITY_MASK;
889 I915_WRITE(MIPI_CTRL(port), tmp |
890 READ_REQUEST_PRIORITY_HIGH);
891 } else if (IS_BROXTON(dev)) {
892 enum pipe pipe = intel_crtc->pipe;
893
894 tmp = I915_READ(MIPI_CTRL(port));
895 tmp &= ~BXT_PIPE_SELECT_MASK;
896
897 tmp |= BXT_PIPE_SELECT(pipe);
898 I915_WRITE(MIPI_CTRL(port), tmp);
899 }
900
901 /* XXX: why here, why like this? handling in irq handler?! */
902 I915_WRITE(MIPI_INTR_STAT(port), 0xffffffff);
903 I915_WRITE(MIPI_INTR_EN(port), 0xffffffff);
904
905 I915_WRITE(MIPI_DPHY_PARAM(port), intel_dsi->dphy_reg);
906
907 I915_WRITE(MIPI_DPI_RESOLUTION(port),
908 adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT |
909 mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT);
910 }
911
912 set_dsi_timings(encoder, adjusted_mode);
913
914 val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
915 if (is_cmd_mode(intel_dsi)) {
916 val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
917 val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
918 } else {
919 val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
920
921 /* XXX: cross-check bpp vs. pixel format? */
922 val |= intel_dsi->pixel_format;
923 }
924
925 tmp = 0;
926 if (intel_dsi->eotp_pkt == 0)
927 tmp |= EOT_DISABLE;
928 if (intel_dsi->clock_stop)
929 tmp |= CLOCKSTOP;
930
931 for_each_dsi_port(port, intel_dsi->ports) {
932 I915_WRITE(MIPI_DSI_FUNC_PRG(port), val);
933
934 /* timeouts for recovery. one frame IIUC. if counter expires,
935 * EOT and stop state. */
936
937 /*
938 * In burst mode, value greater than one DPI line Time in byte
939 * clock (txbyteclkhs) To timeout this timer 1+ of the above
940 * said value is recommended.
941 *
942 * In non-burst mode, Value greater than one DPI frame time in
943 * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
944 * said value is recommended.
945 *
946 * In DBI only mode, value greater than one DBI frame time in
947 * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
948 * said value is recommended.
949 */
950
951 if (is_vid_mode(intel_dsi) &&
952 intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
953 I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
954 txbyteclkhs(adjusted_mode->crtc_htotal, bpp,
955 intel_dsi->lane_count,
956 intel_dsi->burst_mode_ratio) + 1);
957 } else {
958 I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
959 txbyteclkhs(adjusted_mode->crtc_vtotal *
960 adjusted_mode->crtc_htotal,
961 bpp, intel_dsi->lane_count,
962 intel_dsi->burst_mode_ratio) + 1);
963 }
964 I915_WRITE(MIPI_LP_RX_TIMEOUT(port), intel_dsi->lp_rx_timeout);
965 I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(port),
966 intel_dsi->turn_arnd_val);
967 I915_WRITE(MIPI_DEVICE_RESET_TIMER(port),
968 intel_dsi->rst_timer_val);
969
970 /* dphy stuff */
971
972 /* in terms of low power clock */
973 I915_WRITE(MIPI_INIT_COUNT(port),
974 txclkesc(intel_dsi->escape_clk_div, 100));
975
976 if (IS_BROXTON(dev) && (!intel_dsi->dual_link)) {
977 /*
978 * BXT spec says write MIPI_INIT_COUNT for
979 * both the ports, even if only one is
980 * getting used. So write the other port
981 * if not in dual link mode.
982 */
983 I915_WRITE(MIPI_INIT_COUNT(port ==
984 PORT_A ? PORT_C : PORT_A),
985 intel_dsi->init_count);
986 }
987
988 /* recovery disables */
989 I915_WRITE(MIPI_EOT_DISABLE(port), tmp);
990
991 /* in terms of low power clock */
992 I915_WRITE(MIPI_INIT_COUNT(port), intel_dsi->init_count);
993
994 /* in terms of txbyteclkhs. actual high to low switch +
995 * MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK.
996 *
997 * XXX: write MIPI_STOP_STATE_STALL?
998 */
999 I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(port),
1000 intel_dsi->hs_to_lp_count);
1001
1002 /* XXX: low power clock equivalence in terms of byte clock.
1003 * the number of byte clocks occupied in one low power clock.
1004 * based on txbyteclkhs and txclkesc.
1005 * txclkesc time / txbyteclk time * (105 + MIPI_STOP_STATE_STALL
1006 * ) / 105.???
1007 */
1008 I915_WRITE(MIPI_LP_BYTECLK(port), intel_dsi->lp_byte_clk);
1009
1010 /* the bw essential for transmitting 16 long packets containing
1011 * 252 bytes meant for dcs write memory command is programmed in
1012 * this register in terms of byte clocks. based on dsi transfer
1013 * rate and the number of lanes configured the time taken to
1014 * transmit 16 long packets in a dsi stream varies. */
1015 I915_WRITE(MIPI_DBI_BW_CTRL(port), intel_dsi->bw_timer);
1016
1017 I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(port),
1018 intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT |
1019 intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT);
1020
1021 if (is_vid_mode(intel_dsi))
1022 /* Some panels might have resolution which is not a
1023 * multiple of 64 like 1366 x 768. Enable RANDOM
1024 * resolution support for such panels by default */
1025 I915_WRITE(MIPI_VIDEO_MODE_FORMAT(port),
1026 intel_dsi->video_frmt_cfg_bits |
1027 intel_dsi->video_mode_format |
1028 IP_TG_CONFIG |
1029 RANDOM_DPI_DISPLAY_RESOLUTION);
1030 }
1031}
1032
1033static enum drm_connector_status
1034intel_dsi_detect(struct drm_connector *connector, bool force)
1035{
1036 return connector_status_connected;
1037}
1038
1039static int intel_dsi_get_modes(struct drm_connector *connector)
1040{
1041 struct intel_connector *intel_connector = to_intel_connector(connector);
1042 struct drm_display_mode *mode;
1043
1044 DRM_DEBUG_KMS("\n");
1045
1046 if (!intel_connector->panel.fixed_mode) {
1047 DRM_DEBUG_KMS("no fixed mode\n");
1048 return 0;
1049 }
1050
1051 mode = drm_mode_duplicate(connector->dev,
1052 intel_connector->panel.fixed_mode);
1053 if (!mode) {
1054 DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
1055 return 0;
1056 }
1057
1058 drm_mode_probed_add(connector, mode);
1059 return 1;
1060}
1061
1062static void intel_dsi_connector_destroy(struct drm_connector *connector)
1063{
1064 struct intel_connector *intel_connector = to_intel_connector(connector);
1065
1066 DRM_DEBUG_KMS("\n");
1067 intel_panel_fini(&intel_connector->panel);
1068 drm_connector_cleanup(connector);
1069 kfree(connector);
1070}
1071
1072static void intel_dsi_encoder_destroy(struct drm_encoder *encoder)
1073{
1074 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1075
1076 if (intel_dsi->panel) {
1077 drm_panel_detach(intel_dsi->panel);
1078 /* XXX: Logically this call belongs in the panel driver. */
1079 drm_panel_remove(intel_dsi->panel);
1080 }
1081
1082 /* dispose of the gpios */
1083 if (intel_dsi->gpio_panel)
1084 gpiod_put(intel_dsi->gpio_panel);
1085
1086 intel_encoder_destroy(encoder);
1087}
1088
1089static const struct drm_encoder_funcs intel_dsi_funcs = {
1090 .destroy = intel_dsi_encoder_destroy,
1091};
1092
1093static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = {
1094 .get_modes = intel_dsi_get_modes,
1095 .mode_valid = intel_dsi_mode_valid,
1096 .best_encoder = intel_best_encoder,
1097};
1098
1099static const struct drm_connector_funcs intel_dsi_connector_funcs = {
1100 .dpms = drm_atomic_helper_connector_dpms,
1101 .detect = intel_dsi_detect,
1102 .destroy = intel_dsi_connector_destroy,
1103 .fill_modes = drm_helper_probe_single_connector_modes,
1104 .atomic_get_property = intel_connector_atomic_get_property,
1105 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1106 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1107};
1108
1109void intel_dsi_init(struct drm_device *dev)
1110{
1111 struct intel_dsi *intel_dsi;
1112 struct intel_encoder *intel_encoder;
1113 struct drm_encoder *encoder;
1114 struct intel_connector *intel_connector;
1115 struct drm_connector *connector;
1116 struct drm_display_mode *scan, *fixed_mode = NULL;
1117 struct drm_i915_private *dev_priv = dev->dev_private;
1118 enum port port;
1119 unsigned int i;
1120
1121 DRM_DEBUG_KMS("\n");
1122
1123 /* There is no detection method for MIPI so rely on VBT */
1124 if (!dev_priv->vbt.has_mipi)
1125 return;
1126
1127 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
1128 dev_priv->mipi_mmio_base = VLV_MIPI_BASE;
1129 } else {
1130 DRM_ERROR("Unsupported Mipi device to reg base");
1131 return;
1132 }
1133
1134 intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL);
1135 if (!intel_dsi)
1136 return;
1137
1138 intel_connector = intel_connector_alloc();
1139 if (!intel_connector) {
1140 kfree(intel_dsi);
1141 return;
1142 }
1143
1144 intel_encoder = &intel_dsi->base;
1145 encoder = &intel_encoder->base;
1146 intel_dsi->attached_connector = intel_connector;
1147
1148 connector = &intel_connector->base;
1149
1150 drm_encoder_init(dev, encoder, &intel_dsi_funcs, DRM_MODE_ENCODER_DSI,
1151 NULL);
1152
1153 intel_encoder->compute_config = intel_dsi_compute_config;
1154 intel_encoder->pre_enable = intel_dsi_pre_enable;
1155 intel_encoder->enable = intel_dsi_enable_nop;
1156 intel_encoder->disable = intel_dsi_pre_disable;
1157 intel_encoder->post_disable = intel_dsi_post_disable;
1158 intel_encoder->get_hw_state = intel_dsi_get_hw_state;
1159 intel_encoder->get_config = intel_dsi_get_config;
1160
1161 intel_connector->get_hw_state = intel_connector_get_hw_state;
1162 intel_connector->unregister = intel_connector_unregister;
1163
1164 /* Pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI port C */
1165 if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIA) {
1166 intel_encoder->crtc_mask = (1 << PIPE_A);
1167 intel_dsi->ports = (1 << PORT_A);
1168 } else if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIC) {
1169 intel_encoder->crtc_mask = (1 << PIPE_B);
1170 intel_dsi->ports = (1 << PORT_C);
1171 }
1172
1173 if (dev_priv->vbt.dsi.config->dual_link)
1174 intel_dsi->ports = ((1 << PORT_A) | (1 << PORT_C));
1175
1176 /* Create a DSI host (and a device) for each port. */
1177 for_each_dsi_port(port, intel_dsi->ports) {
1178 struct intel_dsi_host *host;
1179
1180 host = intel_dsi_host_init(intel_dsi, port);
1181 if (!host)
1182 goto err;
1183
1184 intel_dsi->dsi_hosts[port] = host;
1185 }
1186
1187 for (i = 0; i < ARRAY_SIZE(intel_dsi_drivers); i++) {
1188 intel_dsi->panel = intel_dsi_drivers[i].init(intel_dsi,
1189 intel_dsi_drivers[i].panel_id);
1190 if (intel_dsi->panel)
1191 break;
1192 }
1193
1194 if (!intel_dsi->panel) {
1195 DRM_DEBUG_KMS("no device found\n");
1196 goto err;
1197 }
1198
1199 /*
1200 * In case of BYT with CRC PMIC, we need to use GPIO for
1201 * Panel control.
1202 */
1203 if (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) {
1204 intel_dsi->gpio_panel =
1205 gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH);
1206
1207 if (IS_ERR(intel_dsi->gpio_panel)) {
1208 DRM_ERROR("Failed to own gpio for panel control\n");
1209 intel_dsi->gpio_panel = NULL;
1210 }
1211 }
1212
1213 intel_encoder->type = INTEL_OUTPUT_DSI;
1214 intel_encoder->cloneable = 0;
1215 drm_connector_init(dev, connector, &intel_dsi_connector_funcs,
1216 DRM_MODE_CONNECTOR_DSI);
1217
1218 drm_connector_helper_add(connector, &intel_dsi_connector_helper_funcs);
1219
1220 connector->display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/
1221 connector->interlace_allowed = false;
1222 connector->doublescan_allowed = false;
1223
1224 intel_connector_attach_encoder(intel_connector, intel_encoder);
1225
1226 drm_connector_register(connector);
1227
1228 drm_panel_attach(intel_dsi->panel, connector);
1229
1230 mutex_lock(&dev->mode_config.mutex);
1231 drm_panel_get_modes(intel_dsi->panel);
1232 list_for_each_entry(scan, &connector->probed_modes, head) {
1233 if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
1234 fixed_mode = drm_mode_duplicate(dev, scan);
1235 break;
1236 }
1237 }
1238 mutex_unlock(&dev->mode_config.mutex);
1239
1240 if (!fixed_mode) {
1241 DRM_DEBUG_KMS("no fixed mode\n");
1242 goto err;
1243 }
1244
1245 intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
1246 intel_panel_setup_backlight(connector, INVALID_PIPE);
1247
1248 return;
1249
1250err:
1251 drm_encoder_cleanup(&intel_encoder->base);
1252 kfree(intel_dsi);
1253 kfree(intel_connector);
1254}
1/*
2 * Copyright © 2013 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Author: Jani Nikula <jani.nikula@intel.com>
24 */
25
26#include <drm/drmP.h>
27#include <drm/drm_atomic_helper.h>
28#include <drm/drm_crtc.h>
29#include <drm/drm_edid.h>
30#include <drm/i915_drm.h>
31#include <drm/drm_mipi_dsi.h>
32#include <linux/slab.h>
33#include <linux/gpio/consumer.h>
34#include "i915_drv.h"
35#include "intel_drv.h"
36#include "intel_dsi.h"
37
38/* return pixels in terms of txbyteclkhs */
39static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
40 u16 burst_mode_ratio)
41{
42 return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
43 8 * 100), lane_count);
44}
45
46/* return pixels equvalent to txbyteclkhs */
47static u16 pixels_from_txbyteclkhs(u16 clk_hs, int bpp, int lane_count,
48 u16 burst_mode_ratio)
49{
50 return DIV_ROUND_UP((clk_hs * lane_count * 8 * 100),
51 (bpp * burst_mode_ratio));
52}
53
54enum mipi_dsi_pixel_format pixel_format_from_register_bits(u32 fmt)
55{
56 /* It just so happens the VBT matches register contents. */
57 switch (fmt) {
58 case VID_MODE_FORMAT_RGB888:
59 return MIPI_DSI_FMT_RGB888;
60 case VID_MODE_FORMAT_RGB666:
61 return MIPI_DSI_FMT_RGB666;
62 case VID_MODE_FORMAT_RGB666_PACKED:
63 return MIPI_DSI_FMT_RGB666_PACKED;
64 case VID_MODE_FORMAT_RGB565:
65 return MIPI_DSI_FMT_RGB565;
66 default:
67 MISSING_CASE(fmt);
68 return MIPI_DSI_FMT_RGB666;
69 }
70}
71
72void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
73{
74 struct drm_encoder *encoder = &intel_dsi->base.base;
75 struct drm_device *dev = encoder->dev;
76 struct drm_i915_private *dev_priv = to_i915(dev);
77 u32 mask;
78
79 mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
80 LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
81
82 if (intel_wait_for_register(dev_priv,
83 MIPI_GEN_FIFO_STAT(port), mask, mask,
84 100))
85 DRM_ERROR("DPI FIFOs are not empty\n");
86}
87
88static void write_data(struct drm_i915_private *dev_priv,
89 i915_reg_t reg,
90 const u8 *data, u32 len)
91{
92 u32 i, j;
93
94 for (i = 0; i < len; i += 4) {
95 u32 val = 0;
96
97 for (j = 0; j < min_t(u32, len - i, 4); j++)
98 val |= *data++ << 8 * j;
99
100 I915_WRITE(reg, val);
101 }
102}
103
104static void read_data(struct drm_i915_private *dev_priv,
105 i915_reg_t reg,
106 u8 *data, u32 len)
107{
108 u32 i, j;
109
110 for (i = 0; i < len; i += 4) {
111 u32 val = I915_READ(reg);
112
113 for (j = 0; j < min_t(u32, len - i, 4); j++)
114 *data++ = val >> 8 * j;
115 }
116}
117
118static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host,
119 const struct mipi_dsi_msg *msg)
120{
121 struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host);
122 struct drm_device *dev = intel_dsi_host->intel_dsi->base.base.dev;
123 struct drm_i915_private *dev_priv = to_i915(dev);
124 enum port port = intel_dsi_host->port;
125 struct mipi_dsi_packet packet;
126 ssize_t ret;
127 const u8 *header, *data;
128 i915_reg_t data_reg, ctrl_reg;
129 u32 data_mask, ctrl_mask;
130
131 ret = mipi_dsi_create_packet(&packet, msg);
132 if (ret < 0)
133 return ret;
134
135 header = packet.header;
136 data = packet.payload;
137
138 if (msg->flags & MIPI_DSI_MSG_USE_LPM) {
139 data_reg = MIPI_LP_GEN_DATA(port);
140 data_mask = LP_DATA_FIFO_FULL;
141 ctrl_reg = MIPI_LP_GEN_CTRL(port);
142 ctrl_mask = LP_CTRL_FIFO_FULL;
143 } else {
144 data_reg = MIPI_HS_GEN_DATA(port);
145 data_mask = HS_DATA_FIFO_FULL;
146 ctrl_reg = MIPI_HS_GEN_CTRL(port);
147 ctrl_mask = HS_CTRL_FIFO_FULL;
148 }
149
150 /* note: this is never true for reads */
151 if (packet.payload_length) {
152 if (intel_wait_for_register(dev_priv,
153 MIPI_GEN_FIFO_STAT(port),
154 data_mask, 0,
155 50))
156 DRM_ERROR("Timeout waiting for HS/LP DATA FIFO !full\n");
157
158 write_data(dev_priv, data_reg, packet.payload,
159 packet.payload_length);
160 }
161
162 if (msg->rx_len) {
163 I915_WRITE(MIPI_INTR_STAT(port), GEN_READ_DATA_AVAIL);
164 }
165
166 if (intel_wait_for_register(dev_priv,
167 MIPI_GEN_FIFO_STAT(port),
168 ctrl_mask, 0,
169 50)) {
170 DRM_ERROR("Timeout waiting for HS/LP CTRL FIFO !full\n");
171 }
172
173 I915_WRITE(ctrl_reg, header[2] << 16 | header[1] << 8 | header[0]);
174
175 /* ->rx_len is set only for reads */
176 if (msg->rx_len) {
177 data_mask = GEN_READ_DATA_AVAIL;
178 if (intel_wait_for_register(dev_priv,
179 MIPI_INTR_STAT(port),
180 data_mask, data_mask,
181 50))
182 DRM_ERROR("Timeout waiting for read data.\n");
183
184 read_data(dev_priv, data_reg, msg->rx_buf, msg->rx_len);
185 }
186
187 /* XXX: fix for reads and writes */
188 return 4 + packet.payload_length;
189}
190
191static int intel_dsi_host_attach(struct mipi_dsi_host *host,
192 struct mipi_dsi_device *dsi)
193{
194 return 0;
195}
196
197static int intel_dsi_host_detach(struct mipi_dsi_host *host,
198 struct mipi_dsi_device *dsi)
199{
200 return 0;
201}
202
203static const struct mipi_dsi_host_ops intel_dsi_host_ops = {
204 .attach = intel_dsi_host_attach,
205 .detach = intel_dsi_host_detach,
206 .transfer = intel_dsi_host_transfer,
207};
208
209static struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
210 enum port port)
211{
212 struct intel_dsi_host *host;
213 struct mipi_dsi_device *device;
214
215 host = kzalloc(sizeof(*host), GFP_KERNEL);
216 if (!host)
217 return NULL;
218
219 host->base.ops = &intel_dsi_host_ops;
220 host->intel_dsi = intel_dsi;
221 host->port = port;
222
223 /*
224 * We should call mipi_dsi_host_register(&host->base) here, but we don't
225 * have a host->dev, and we don't have OF stuff either. So just use the
226 * dsi framework as a library and hope for the best. Create the dsi
227 * devices by ourselves here too. Need to be careful though, because we
228 * don't initialize any of the driver model devices here.
229 */
230 device = kzalloc(sizeof(*device), GFP_KERNEL);
231 if (!device) {
232 kfree(host);
233 return NULL;
234 }
235
236 device->host = &host->base;
237 host->device = device;
238
239 return host;
240}
241
242/*
243 * send a video mode command
244 *
245 * XXX: commands with data in MIPI_DPI_DATA?
246 */
247static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs,
248 enum port port)
249{
250 struct drm_encoder *encoder = &intel_dsi->base.base;
251 struct drm_device *dev = encoder->dev;
252 struct drm_i915_private *dev_priv = to_i915(dev);
253 u32 mask;
254
255 /* XXX: pipe, hs */
256 if (hs)
257 cmd &= ~DPI_LP_MODE;
258 else
259 cmd |= DPI_LP_MODE;
260
261 /* clear bit */
262 I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);
263
264 /* XXX: old code skips write if control unchanged */
265 if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
266 DRM_DEBUG_KMS("Same special packet %02x twice in a row.\n", cmd);
267
268 I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
269
270 mask = SPL_PKT_SENT_INTERRUPT;
271 if (intel_wait_for_register(dev_priv,
272 MIPI_INTR_STAT(port), mask, mask,
273 100))
274 DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
275
276 return 0;
277}
278
279static void band_gap_reset(struct drm_i915_private *dev_priv)
280{
281 mutex_lock(&dev_priv->sb_lock);
282
283 vlv_flisdsi_write(dev_priv, 0x08, 0x0001);
284 vlv_flisdsi_write(dev_priv, 0x0F, 0x0005);
285 vlv_flisdsi_write(dev_priv, 0x0F, 0x0025);
286 udelay(150);
287 vlv_flisdsi_write(dev_priv, 0x0F, 0x0000);
288 vlv_flisdsi_write(dev_priv, 0x08, 0x0000);
289
290 mutex_unlock(&dev_priv->sb_lock);
291}
292
293static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
294{
295 return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE;
296}
297
298static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
299{
300 return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE;
301}
302
303static bool intel_dsi_compute_config(struct intel_encoder *encoder,
304 struct intel_crtc_state *pipe_config,
305 struct drm_connector_state *conn_state)
306{
307 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
308 struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi,
309 base);
310 struct intel_connector *intel_connector = intel_dsi->attached_connector;
311 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
312 const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
313 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
314 int ret;
315
316 DRM_DEBUG_KMS("\n");
317
318 if (fixed_mode) {
319 intel_fixed_panel_mode(fixed_mode, adjusted_mode);
320
321 if (HAS_GMCH_DISPLAY(dev_priv))
322 intel_gmch_panel_fitting(crtc, pipe_config,
323 conn_state->scaling_mode);
324 else
325 intel_pch_panel_fitting(crtc, pipe_config,
326 conn_state->scaling_mode);
327 }
328
329 /* DSI uses short packets for sync events, so clear mode flags for DSI */
330 adjusted_mode->flags = 0;
331
332 if (IS_GEN9_LP(dev_priv)) {
333 /* Enable Frame time stamp based scanline reporting */
334 adjusted_mode->private_flags |=
335 I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
336
337 /* Dual link goes to DSI transcoder A. */
338 if (intel_dsi->ports == BIT(PORT_C))
339 pipe_config->cpu_transcoder = TRANSCODER_DSI_C;
340 else
341 pipe_config->cpu_transcoder = TRANSCODER_DSI_A;
342 }
343
344 ret = intel_compute_dsi_pll(encoder, pipe_config);
345 if (ret)
346 return false;
347
348 pipe_config->clock_set = true;
349
350 return true;
351}
352
353static bool glk_dsi_enable_io(struct intel_encoder *encoder)
354{
355 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
356 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
357 enum port port;
358 u32 tmp;
359 bool cold_boot = false;
360
361 /* Set the MIPI mode
362 * If MIPI_Mode is off, then writing to LP_Wake bit is not reflecting.
363 * Power ON MIPI IO first and then write into IO reset and LP wake bits
364 */
365 for_each_dsi_port(port, intel_dsi->ports) {
366 tmp = I915_READ(MIPI_CTRL(port));
367 I915_WRITE(MIPI_CTRL(port), tmp | GLK_MIPIIO_ENABLE);
368 }
369
370 /* Put the IO into reset */
371 tmp = I915_READ(MIPI_CTRL(PORT_A));
372 tmp &= ~GLK_MIPIIO_RESET_RELEASED;
373 I915_WRITE(MIPI_CTRL(PORT_A), tmp);
374
375 /* Program LP Wake */
376 for_each_dsi_port(port, intel_dsi->ports) {
377 tmp = I915_READ(MIPI_CTRL(port));
378 if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY))
379 tmp &= ~GLK_LP_WAKE;
380 else
381 tmp |= GLK_LP_WAKE;
382 I915_WRITE(MIPI_CTRL(port), tmp);
383 }
384
385 /* Wait for Pwr ACK */
386 for_each_dsi_port(port, intel_dsi->ports) {
387 if (intel_wait_for_register(dev_priv,
388 MIPI_CTRL(port), GLK_MIPIIO_PORT_POWERED,
389 GLK_MIPIIO_PORT_POWERED, 20))
390 DRM_ERROR("MIPIO port is powergated\n");
391 }
392
393 /* Check for cold boot scenario */
394 for_each_dsi_port(port, intel_dsi->ports) {
395 cold_boot |= !(I915_READ(MIPI_DEVICE_READY(port)) &
396 DEVICE_READY);
397 }
398
399 return cold_boot;
400}
401
402static void glk_dsi_device_ready(struct intel_encoder *encoder)
403{
404 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
405 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
406 enum port port;
407 u32 val;
408
409 /* Wait for MIPI PHY status bit to set */
410 for_each_dsi_port(port, intel_dsi->ports) {
411 if (intel_wait_for_register(dev_priv,
412 MIPI_CTRL(port), GLK_PHY_STATUS_PORT_READY,
413 GLK_PHY_STATUS_PORT_READY, 20))
414 DRM_ERROR("PHY is not ON\n");
415 }
416
417 /* Get IO out of reset */
418 val = I915_READ(MIPI_CTRL(PORT_A));
419 I915_WRITE(MIPI_CTRL(PORT_A), val | GLK_MIPIIO_RESET_RELEASED);
420
421 /* Get IO out of Low power state*/
422 for_each_dsi_port(port, intel_dsi->ports) {
423 if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY)) {
424 val = I915_READ(MIPI_DEVICE_READY(port));
425 val &= ~ULPS_STATE_MASK;
426 val |= DEVICE_READY;
427 I915_WRITE(MIPI_DEVICE_READY(port), val);
428 usleep_range(10, 15);
429 } else {
430 /* Enter ULPS */
431 val = I915_READ(MIPI_DEVICE_READY(port));
432 val &= ~ULPS_STATE_MASK;
433 val |= (ULPS_STATE_ENTER | DEVICE_READY);
434 I915_WRITE(MIPI_DEVICE_READY(port), val);
435
436 /* Wait for ULPS active */
437 if (intel_wait_for_register(dev_priv,
438 MIPI_CTRL(port), GLK_ULPS_NOT_ACTIVE, 0, 20))
439 DRM_ERROR("ULPS not active\n");
440
441 /* Exit ULPS */
442 val = I915_READ(MIPI_DEVICE_READY(port));
443 val &= ~ULPS_STATE_MASK;
444 val |= (ULPS_STATE_EXIT | DEVICE_READY);
445 I915_WRITE(MIPI_DEVICE_READY(port), val);
446
447 /* Enter Normal Mode */
448 val = I915_READ(MIPI_DEVICE_READY(port));
449 val &= ~ULPS_STATE_MASK;
450 val |= (ULPS_STATE_NORMAL_OPERATION | DEVICE_READY);
451 I915_WRITE(MIPI_DEVICE_READY(port), val);
452
453 val = I915_READ(MIPI_CTRL(port));
454 val &= ~GLK_LP_WAKE;
455 I915_WRITE(MIPI_CTRL(port), val);
456 }
457 }
458
459 /* Wait for Stop state */
460 for_each_dsi_port(port, intel_dsi->ports) {
461 if (intel_wait_for_register(dev_priv,
462 MIPI_CTRL(port), GLK_DATA_LANE_STOP_STATE,
463 GLK_DATA_LANE_STOP_STATE, 20))
464 DRM_ERROR("Date lane not in STOP state\n");
465 }
466
467 /* Wait for AFE LATCH */
468 for_each_dsi_port(port, intel_dsi->ports) {
469 if (intel_wait_for_register(dev_priv,
470 BXT_MIPI_PORT_CTRL(port), AFE_LATCHOUT,
471 AFE_LATCHOUT, 20))
472 DRM_ERROR("D-PHY not entering LP-11 state\n");
473 }
474}
475
476static void bxt_dsi_device_ready(struct intel_encoder *encoder)
477{
478 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
479 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
480 enum port port;
481 u32 val;
482
483 DRM_DEBUG_KMS("\n");
484
485 /* Enable MIPI PHY transparent latch */
486 for_each_dsi_port(port, intel_dsi->ports) {
487 val = I915_READ(BXT_MIPI_PORT_CTRL(port));
488 I915_WRITE(BXT_MIPI_PORT_CTRL(port), val | LP_OUTPUT_HOLD);
489 usleep_range(2000, 2500);
490 }
491
492 /* Clear ULPS and set device ready */
493 for_each_dsi_port(port, intel_dsi->ports) {
494 val = I915_READ(MIPI_DEVICE_READY(port));
495 val &= ~ULPS_STATE_MASK;
496 I915_WRITE(MIPI_DEVICE_READY(port), val);
497 usleep_range(2000, 2500);
498 val |= DEVICE_READY;
499 I915_WRITE(MIPI_DEVICE_READY(port), val);
500 }
501}
502
503static void vlv_dsi_device_ready(struct intel_encoder *encoder)
504{
505 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
506 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
507 enum port port;
508 u32 val;
509
510 DRM_DEBUG_KMS("\n");
511
512 mutex_lock(&dev_priv->sb_lock);
513 /* program rcomp for compliance, reduce from 50 ohms to 45 ohms
514 * needed everytime after power gate */
515 vlv_flisdsi_write(dev_priv, 0x04, 0x0004);
516 mutex_unlock(&dev_priv->sb_lock);
517
518 /* bandgap reset is needed after everytime we do power gate */
519 band_gap_reset(dev_priv);
520
521 for_each_dsi_port(port, intel_dsi->ports) {
522
523 I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_ENTER);
524 usleep_range(2500, 3000);
525
526 /* Enable MIPI PHY transparent latch
527 * Common bit for both MIPI Port A & MIPI Port C
528 * No similar bit in MIPI Port C reg
529 */
530 val = I915_READ(MIPI_PORT_CTRL(PORT_A));
531 I915_WRITE(MIPI_PORT_CTRL(PORT_A), val | LP_OUTPUT_HOLD);
532 usleep_range(1000, 1500);
533
534 I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_EXIT);
535 usleep_range(2500, 3000);
536
537 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY);
538 usleep_range(2500, 3000);
539 }
540}
541
542static void intel_dsi_device_ready(struct intel_encoder *encoder)
543{
544 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
545
546 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
547 vlv_dsi_device_ready(encoder);
548 else if (IS_BROXTON(dev_priv))
549 bxt_dsi_device_ready(encoder);
550 else if (IS_GEMINILAKE(dev_priv))
551 glk_dsi_device_ready(encoder);
552}
553
554static void glk_dsi_enter_low_power_mode(struct intel_encoder *encoder)
555{
556 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
557 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
558 enum port port;
559 u32 val;
560
561 /* Enter ULPS */
562 for_each_dsi_port(port, intel_dsi->ports) {
563 val = I915_READ(MIPI_DEVICE_READY(port));
564 val &= ~ULPS_STATE_MASK;
565 val |= (ULPS_STATE_ENTER | DEVICE_READY);
566 I915_WRITE(MIPI_DEVICE_READY(port), val);
567 }
568
569 /* Wait for MIPI PHY status bit to unset */
570 for_each_dsi_port(port, intel_dsi->ports) {
571 if (intel_wait_for_register(dev_priv,
572 MIPI_CTRL(port),
573 GLK_PHY_STATUS_PORT_READY, 0, 20))
574 DRM_ERROR("PHY is not turning OFF\n");
575 }
576
577 /* Wait for Pwr ACK bit to unset */
578 for_each_dsi_port(port, intel_dsi->ports) {
579 if (intel_wait_for_register(dev_priv,
580 MIPI_CTRL(port),
581 GLK_MIPIIO_PORT_POWERED, 0, 20))
582 DRM_ERROR("MIPI IO Port is not powergated\n");
583 }
584}
585
586static void glk_dsi_disable_mipi_io(struct intel_encoder *encoder)
587{
588 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
589 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
590 enum port port;
591 u32 tmp;
592
593 /* Put the IO into reset */
594 tmp = I915_READ(MIPI_CTRL(PORT_A));
595 tmp &= ~GLK_MIPIIO_RESET_RELEASED;
596 I915_WRITE(MIPI_CTRL(PORT_A), tmp);
597
598 /* Wait for MIPI PHY status bit to unset */
599 for_each_dsi_port(port, intel_dsi->ports) {
600 if (intel_wait_for_register(dev_priv,
601 MIPI_CTRL(port),
602 GLK_PHY_STATUS_PORT_READY, 0, 20))
603 DRM_ERROR("PHY is not turning OFF\n");
604 }
605
606 /* Clear MIPI mode */
607 for_each_dsi_port(port, intel_dsi->ports) {
608 tmp = I915_READ(MIPI_CTRL(port));
609 tmp &= ~GLK_MIPIIO_ENABLE;
610 I915_WRITE(MIPI_CTRL(port), tmp);
611 }
612}
613
614static void glk_dsi_clear_device_ready(struct intel_encoder *encoder)
615{
616 glk_dsi_enter_low_power_mode(encoder);
617 glk_dsi_disable_mipi_io(encoder);
618}
619
620static void vlv_dsi_clear_device_ready(struct intel_encoder *encoder)
621{
622 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
623 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
624 enum port port;
625
626 DRM_DEBUG_KMS("\n");
627 for_each_dsi_port(port, intel_dsi->ports) {
628 /* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */
629 i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ?
630 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(PORT_A);
631 u32 val;
632
633 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
634 ULPS_STATE_ENTER);
635 usleep_range(2000, 2500);
636
637 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
638 ULPS_STATE_EXIT);
639 usleep_range(2000, 2500);
640
641 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
642 ULPS_STATE_ENTER);
643 usleep_range(2000, 2500);
644
645 /*
646 * On VLV/CHV, wait till Clock lanes are in LP-00 state for MIPI
647 * Port A only. MIPI Port C has no similar bit for checking.
648 */
649 if ((IS_GEN9_LP(dev_priv) || port == PORT_A) &&
650 intel_wait_for_register(dev_priv,
651 port_ctrl, AFE_LATCHOUT, 0,
652 30))
653 DRM_ERROR("DSI LP not going Low\n");
654
655 /* Disable MIPI PHY transparent latch */
656 val = I915_READ(port_ctrl);
657 I915_WRITE(port_ctrl, val & ~LP_OUTPUT_HOLD);
658 usleep_range(1000, 1500);
659
660 I915_WRITE(MIPI_DEVICE_READY(port), 0x00);
661 usleep_range(2000, 2500);
662 }
663}
664
665static void intel_dsi_port_enable(struct intel_encoder *encoder,
666 const struct intel_crtc_state *crtc_state)
667{
668 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
669 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
670 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
671 enum port port;
672
673 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
674 u32 temp;
675 if (IS_GEN9_LP(dev_priv)) {
676 for_each_dsi_port(port, intel_dsi->ports) {
677 temp = I915_READ(MIPI_CTRL(port));
678 temp &= ~BXT_PIXEL_OVERLAP_CNT_MASK |
679 intel_dsi->pixel_overlap <<
680 BXT_PIXEL_OVERLAP_CNT_SHIFT;
681 I915_WRITE(MIPI_CTRL(port), temp);
682 }
683 } else {
684 temp = I915_READ(VLV_CHICKEN_3);
685 temp &= ~PIXEL_OVERLAP_CNT_MASK |
686 intel_dsi->pixel_overlap <<
687 PIXEL_OVERLAP_CNT_SHIFT;
688 I915_WRITE(VLV_CHICKEN_3, temp);
689 }
690 }
691
692 for_each_dsi_port(port, intel_dsi->ports) {
693 i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ?
694 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
695 u32 temp;
696
697 temp = I915_READ(port_ctrl);
698
699 temp &= ~LANE_CONFIGURATION_MASK;
700 temp &= ~DUAL_LINK_MODE_MASK;
701
702 if (intel_dsi->ports == (BIT(PORT_A) | BIT(PORT_C))) {
703 temp |= (intel_dsi->dual_link - 1)
704 << DUAL_LINK_MODE_SHIFT;
705 if (IS_BROXTON(dev_priv))
706 temp |= LANE_CONFIGURATION_DUAL_LINK_A;
707 else
708 temp |= crtc->pipe ?
709 LANE_CONFIGURATION_DUAL_LINK_B :
710 LANE_CONFIGURATION_DUAL_LINK_A;
711 }
712 /* assert ip_tg_enable signal */
713 I915_WRITE(port_ctrl, temp | DPI_ENABLE);
714 POSTING_READ(port_ctrl);
715 }
716}
717
718static void intel_dsi_port_disable(struct intel_encoder *encoder)
719{
720 struct drm_device *dev = encoder->base.dev;
721 struct drm_i915_private *dev_priv = to_i915(dev);
722 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
723 enum port port;
724
725 for_each_dsi_port(port, intel_dsi->ports) {
726 i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ?
727 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
728 u32 temp;
729
730 /* de-assert ip_tg_enable signal */
731 temp = I915_READ(port_ctrl);
732 I915_WRITE(port_ctrl, temp & ~DPI_ENABLE);
733 POSTING_READ(port_ctrl);
734 }
735}
736
737static void intel_dsi_prepare(struct intel_encoder *intel_encoder,
738 const struct intel_crtc_state *pipe_config);
739static void intel_dsi_unprepare(struct intel_encoder *encoder);
740
741static void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
742{
743 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
744
745 /* For v3 VBTs in vid-mode the delays are part of the VBT sequences */
746 if (is_vid_mode(intel_dsi) && dev_priv->vbt.dsi.seq_version >= 3)
747 return;
748
749 msleep(msec);
750}
751
752/*
753 * Panel enable/disable sequences from the VBT spec.
754 *
755 * Note the spec has AssertReset / DeassertReset swapped from their
756 * usual naming. We use the normal names to avoid confusion (so below
757 * they are swapped compared to the spec).
758 *
759 * Steps starting with MIPI refer to VBT sequences, note that for v2
760 * VBTs several steps which have a VBT in v2 are expected to be handled
761 * directly by the driver, by directly driving gpios for example.
762 *
763 * v2 video mode seq v3 video mode seq command mode seq
764 * - power on - MIPIPanelPowerOn - power on
765 * - wait t1+t2 - wait t1+t2
766 * - MIPIDeassertResetPin - MIPIDeassertResetPin - MIPIDeassertResetPin
767 * - io lines to lp-11 - io lines to lp-11 - io lines to lp-11
768 * - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds
769 * - MIPITearOn
770 * - MIPIDisplayOn
771 * - turn on DPI - turn on DPI - set pipe to dsr mode
772 * - MIPIDisplayOn - MIPIDisplayOn
773 * - wait t5 - wait t5
774 * - backlight on - MIPIBacklightOn - backlight on
775 * ... ... ... issue mem cmds ...
776 * - backlight off - MIPIBacklightOff - backlight off
777 * - wait t6 - wait t6
778 * - MIPIDisplayOff
779 * - turn off DPI - turn off DPI - disable pipe dsr mode
780 * - MIPITearOff
781 * - MIPIDisplayOff - MIPIDisplayOff
782 * - io lines to lp-00 - io lines to lp-00 - io lines to lp-00
783 * - MIPIAssertResetPin - MIPIAssertResetPin - MIPIAssertResetPin
784 * - wait t3 - wait t3
785 * - power off - MIPIPanelPowerOff - power off
786 * - wait t4 - wait t4
787 */
788
789static void intel_dsi_pre_enable(struct intel_encoder *encoder,
790 const struct intel_crtc_state *pipe_config,
791 const struct drm_connector_state *conn_state)
792{
793 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
794 struct drm_crtc *crtc = pipe_config->base.crtc;
795 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
796 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
797 int pipe = intel_crtc->pipe;
798 enum port port;
799 u32 val;
800 bool glk_cold_boot = false;
801
802 DRM_DEBUG_KMS("\n");
803
804 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
805
806 /*
807 * The BIOS may leave the PLL in a wonky state where it doesn't
808 * lock. It needs to be fully powered down to fix it.
809 */
810 intel_disable_dsi_pll(encoder);
811 intel_enable_dsi_pll(encoder, pipe_config);
812
813 if (IS_BROXTON(dev_priv)) {
814 /* Add MIPI IO reset programming for modeset */
815 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
816 I915_WRITE(BXT_P_CR_GT_DISP_PWRON,
817 val | MIPIO_RST_CTRL);
818
819 /* Power up DSI regulator */
820 I915_WRITE(BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
821 I915_WRITE(BXT_P_DSI_REGULATOR_TX_CTRL, 0);
822 }
823
824 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
825 u32 val;
826
827 /* Disable DPOunit clock gating, can stall pipe */
828 val = I915_READ(DSPCLK_GATE_D);
829 val |= DPOUNIT_CLOCK_GATE_DISABLE;
830 I915_WRITE(DSPCLK_GATE_D, val);
831 }
832
833 if (!IS_GEMINILAKE(dev_priv))
834 intel_dsi_prepare(encoder, pipe_config);
835
836 /* Power on, try both CRC pmic gpio and VBT */
837 if (intel_dsi->gpio_panel)
838 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
839 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
840 intel_dsi_msleep(intel_dsi, intel_dsi->panel_on_delay);
841
842 /* Deassert reset */
843 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
844
845 if (IS_GEMINILAKE(dev_priv)) {
846 glk_cold_boot = glk_dsi_enable_io(encoder);
847
848 /* Prepare port in cold boot(s3/s4) scenario */
849 if (glk_cold_boot)
850 intel_dsi_prepare(encoder, pipe_config);
851 }
852
853 /* Put device in ready state (LP-11) */
854 intel_dsi_device_ready(encoder);
855
856 /* Prepare port in normal boot scenario */
857 if (IS_GEMINILAKE(dev_priv) && !glk_cold_boot)
858 intel_dsi_prepare(encoder, pipe_config);
859
860 /* Send initialization commands in LP mode */
861 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_INIT_OTP);
862
863 /* Enable port in pre-enable phase itself because as per hw team
864 * recommendation, port should be enabled befor plane & pipe */
865 if (is_cmd_mode(intel_dsi)) {
866 for_each_dsi_port(port, intel_dsi->ports)
867 I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(port), 8 * 4);
868 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_ON);
869 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
870 } else {
871 msleep(20); /* XXX */
872 for_each_dsi_port(port, intel_dsi->ports)
873 dpi_send_cmd(intel_dsi, TURN_ON, false, port);
874 intel_dsi_msleep(intel_dsi, 100);
875
876 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
877
878 intel_dsi_port_enable(encoder, pipe_config);
879 }
880
881 intel_panel_enable_backlight(pipe_config, conn_state);
882 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_ON);
883}
884
885/*
886 * DSI port enable has to be done before pipe and plane enable, so we do it in
887 * the pre_enable hook.
888 */
889static void intel_dsi_enable_nop(struct intel_encoder *encoder,
890 const struct intel_crtc_state *pipe_config,
891 const struct drm_connector_state *conn_state)
892{
893 DRM_DEBUG_KMS("\n");
894}
895
896/*
897 * DSI port disable has to be done after pipe and plane disable, so we do it in
898 * the post_disable hook.
899 */
900static void intel_dsi_disable(struct intel_encoder *encoder,
901 const struct intel_crtc_state *old_crtc_state,
902 const struct drm_connector_state *old_conn_state)
903{
904 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
905 enum port port;
906
907 DRM_DEBUG_KMS("\n");
908
909 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_OFF);
910 intel_panel_disable_backlight(old_conn_state);
911
912 /*
913 * According to the spec we should send SHUTDOWN before
914 * MIPI_SEQ_DISPLAY_OFF only for v3+ VBTs, but field testing
915 * has shown that the v3 sequence works for v2 VBTs too
916 */
917 if (is_vid_mode(intel_dsi)) {
918 /* Send Shutdown command to the panel in LP mode */
919 for_each_dsi_port(port, intel_dsi->ports)
920 dpi_send_cmd(intel_dsi, SHUTDOWN, false, port);
921 msleep(10);
922 }
923}
924
925static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
926{
927 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
928
929 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) ||
930 IS_BROXTON(dev_priv))
931 vlv_dsi_clear_device_ready(encoder);
932 else if (IS_GEMINILAKE(dev_priv))
933 glk_dsi_clear_device_ready(encoder);
934}
935
936static void intel_dsi_post_disable(struct intel_encoder *encoder,
937 const struct intel_crtc_state *pipe_config,
938 const struct drm_connector_state *conn_state)
939{
940 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
941 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
942 enum port port;
943 u32 val;
944
945 DRM_DEBUG_KMS("\n");
946
947 if (is_vid_mode(intel_dsi)) {
948 for_each_dsi_port(port, intel_dsi->ports)
949 wait_for_dsi_fifo_empty(intel_dsi, port);
950
951 intel_dsi_port_disable(encoder);
952 usleep_range(2000, 5000);
953 }
954
955 intel_dsi_unprepare(encoder);
956
957 /*
958 * if disable packets are sent before sending shutdown packet then in
959 * some next enable sequence send turn on packet error is observed
960 */
961 if (is_cmd_mode(intel_dsi))
962 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_OFF);
963 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_OFF);
964
965 /* Transition to LP-00 */
966 intel_dsi_clear_device_ready(encoder);
967
968 if (IS_BROXTON(dev_priv)) {
969 /* Power down DSI regulator to save power */
970 I915_WRITE(BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
971 I915_WRITE(BXT_P_DSI_REGULATOR_TX_CTRL, HS_IO_CTRL_SELECT);
972
973 /* Add MIPI IO reset programming for modeset */
974 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
975 I915_WRITE(BXT_P_CR_GT_DISP_PWRON,
976 val & ~MIPIO_RST_CTRL);
977 }
978
979 intel_disable_dsi_pll(encoder);
980
981 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
982 u32 val;
983
984 val = I915_READ(DSPCLK_GATE_D);
985 val &= ~DPOUNIT_CLOCK_GATE_DISABLE;
986 I915_WRITE(DSPCLK_GATE_D, val);
987 }
988
989 /* Assert reset */
990 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);
991
992 /* Power off, try both CRC pmic gpio and VBT */
993 intel_dsi_msleep(intel_dsi, intel_dsi->panel_off_delay);
994 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
995 if (intel_dsi->gpio_panel)
996 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
997
998 /*
999 * FIXME As we do with eDP, just make a note of the time here
1000 * and perform the wait before the next panel power on.
1001 */
1002 intel_dsi_msleep(intel_dsi, intel_dsi->panel_pwr_cycle_delay);
1003}
1004
1005static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
1006 enum pipe *pipe)
1007{
1008 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1009 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
1010 enum port port;
1011 bool active = false;
1012
1013 DRM_DEBUG_KMS("\n");
1014
1015 if (!intel_display_power_get_if_enabled(dev_priv,
1016 encoder->power_domain))
1017 return false;
1018
1019 /*
1020 * On Broxton the PLL needs to be enabled with a valid divider
1021 * configuration, otherwise accessing DSI registers will hang the
1022 * machine. See BSpec North Display Engine registers/MIPI[BXT].
1023 */
1024 if (IS_GEN9_LP(dev_priv) && !intel_dsi_pll_is_enabled(dev_priv))
1025 goto out_put_power;
1026
1027 /* XXX: this only works for one DSI output */
1028 for_each_dsi_port(port, intel_dsi->ports) {
1029 i915_reg_t ctrl_reg = IS_GEN9_LP(dev_priv) ?
1030 BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
1031 bool enabled = I915_READ(ctrl_reg) & DPI_ENABLE;
1032
1033 /*
1034 * Due to some hardware limitations on VLV/CHV, the DPI enable
1035 * bit in port C control register does not get set. As a
1036 * workaround, check pipe B conf instead.
1037 */
1038 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
1039 port == PORT_C)
1040 enabled = I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE;
1041
1042 /* Try command mode if video mode not enabled */
1043 if (!enabled) {
1044 u32 tmp = I915_READ(MIPI_DSI_FUNC_PRG(port));
1045 enabled = tmp & CMD_MODE_DATA_WIDTH_MASK;
1046 }
1047
1048 if (!enabled)
1049 continue;
1050
1051 if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY))
1052 continue;
1053
1054 if (IS_GEN9_LP(dev_priv)) {
1055 u32 tmp = I915_READ(MIPI_CTRL(port));
1056 tmp &= BXT_PIPE_SELECT_MASK;
1057 tmp >>= BXT_PIPE_SELECT_SHIFT;
1058
1059 if (WARN_ON(tmp > PIPE_C))
1060 continue;
1061
1062 *pipe = tmp;
1063 } else {
1064 *pipe = port == PORT_A ? PIPE_A : PIPE_B;
1065 }
1066
1067 active = true;
1068 break;
1069 }
1070
1071out_put_power:
1072 intel_display_power_put(dev_priv, encoder->power_domain);
1073
1074 return active;
1075}
1076
1077static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder,
1078 struct intel_crtc_state *pipe_config)
1079{
1080 struct drm_device *dev = encoder->base.dev;
1081 struct drm_i915_private *dev_priv = to_i915(dev);
1082 struct drm_display_mode *adjusted_mode =
1083 &pipe_config->base.adjusted_mode;
1084 struct drm_display_mode *adjusted_mode_sw;
1085 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
1086 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
1087 unsigned int lane_count = intel_dsi->lane_count;
1088 unsigned int bpp, fmt;
1089 enum port port;
1090 u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
1091 u16 hfp_sw, hsync_sw, hbp_sw;
1092 u16 crtc_htotal_sw, crtc_hsync_start_sw, crtc_hsync_end_sw,
1093 crtc_hblank_start_sw, crtc_hblank_end_sw;
1094
1095 /* FIXME: hw readout should not depend on SW state */
1096 adjusted_mode_sw = &crtc->config->base.adjusted_mode;
1097
1098 /*
1099 * Atleast one port is active as encoder->get_config called only if
1100 * encoder->get_hw_state() returns true.
1101 */
1102 for_each_dsi_port(port, intel_dsi->ports) {
1103 if (I915_READ(BXT_MIPI_PORT_CTRL(port)) & DPI_ENABLE)
1104 break;
1105 }
1106
1107 fmt = I915_READ(MIPI_DSI_FUNC_PRG(port)) & VID_MODE_FORMAT_MASK;
1108 pipe_config->pipe_bpp =
1109 mipi_dsi_pixel_format_to_bpp(
1110 pixel_format_from_register_bits(fmt));
1111 bpp = pipe_config->pipe_bpp;
1112
1113 /* Enable Frame time stamo based scanline reporting */
1114 adjusted_mode->private_flags |=
1115 I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
1116
1117 /* In terms of pixels */
1118 adjusted_mode->crtc_hdisplay =
1119 I915_READ(BXT_MIPI_TRANS_HACTIVE(port));
1120 adjusted_mode->crtc_vdisplay =
1121 I915_READ(BXT_MIPI_TRANS_VACTIVE(port));
1122 adjusted_mode->crtc_vtotal =
1123 I915_READ(BXT_MIPI_TRANS_VTOTAL(port));
1124
1125 hactive = adjusted_mode->crtc_hdisplay;
1126 hfp = I915_READ(MIPI_HFP_COUNT(port));
1127
1128 /*
1129 * Meaningful for video mode non-burst sync pulse mode only,
1130 * can be zero for non-burst sync events and burst modes
1131 */
1132 hsync = I915_READ(MIPI_HSYNC_PADDING_COUNT(port));
1133 hbp = I915_READ(MIPI_HBP_COUNT(port));
1134
1135 /* harizontal values are in terms of high speed byte clock */
1136 hfp = pixels_from_txbyteclkhs(hfp, bpp, lane_count,
1137 intel_dsi->burst_mode_ratio);
1138 hsync = pixels_from_txbyteclkhs(hsync, bpp, lane_count,
1139 intel_dsi->burst_mode_ratio);
1140 hbp = pixels_from_txbyteclkhs(hbp, bpp, lane_count,
1141 intel_dsi->burst_mode_ratio);
1142
1143 if (intel_dsi->dual_link) {
1144 hfp *= 2;
1145 hsync *= 2;
1146 hbp *= 2;
1147 }
1148
1149 /* vertical values are in terms of lines */
1150 vfp = I915_READ(MIPI_VFP_COUNT(port));
1151 vsync = I915_READ(MIPI_VSYNC_PADDING_COUNT(port));
1152 vbp = I915_READ(MIPI_VBP_COUNT(port));
1153
1154 adjusted_mode->crtc_htotal = hactive + hfp + hsync + hbp;
1155 adjusted_mode->crtc_hsync_start = hfp + adjusted_mode->crtc_hdisplay;
1156 adjusted_mode->crtc_hsync_end = hsync + adjusted_mode->crtc_hsync_start;
1157 adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hdisplay;
1158 adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal;
1159
1160 adjusted_mode->crtc_vsync_start = vfp + adjusted_mode->crtc_vdisplay;
1161 adjusted_mode->crtc_vsync_end = vsync + adjusted_mode->crtc_vsync_start;
1162 adjusted_mode->crtc_vblank_start = adjusted_mode->crtc_vdisplay;
1163 adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
1164
1165 /*
1166 * In BXT DSI there is no regs programmed with few horizontal timings
1167 * in Pixels but txbyteclkhs.. So retrieval process adds some
1168 * ROUND_UP ERRORS in the process of PIXELS<==>txbyteclkhs.
1169 * Actually here for the given adjusted_mode, we are calculating the
1170 * value programmed to the port and then back to the horizontal timing
1171 * param in pixels. This is the expected value, including roundup errors
1172 * And if that is same as retrieved value from port, then
1173 * (HW state) adjusted_mode's horizontal timings are corrected to
1174 * match with SW state to nullify the errors.
1175 */
1176 /* Calculating the value programmed to the Port register */
1177 hfp_sw = adjusted_mode_sw->crtc_hsync_start -
1178 adjusted_mode_sw->crtc_hdisplay;
1179 hsync_sw = adjusted_mode_sw->crtc_hsync_end -
1180 adjusted_mode_sw->crtc_hsync_start;
1181 hbp_sw = adjusted_mode_sw->crtc_htotal -
1182 adjusted_mode_sw->crtc_hsync_end;
1183
1184 if (intel_dsi->dual_link) {
1185 hfp_sw /= 2;
1186 hsync_sw /= 2;
1187 hbp_sw /= 2;
1188 }
1189
1190 hfp_sw = txbyteclkhs(hfp_sw, bpp, lane_count,
1191 intel_dsi->burst_mode_ratio);
1192 hsync_sw = txbyteclkhs(hsync_sw, bpp, lane_count,
1193 intel_dsi->burst_mode_ratio);
1194 hbp_sw = txbyteclkhs(hbp_sw, bpp, lane_count,
1195 intel_dsi->burst_mode_ratio);
1196
1197 /* Reverse calculating the adjusted mode parameters from port reg vals*/
1198 hfp_sw = pixels_from_txbyteclkhs(hfp_sw, bpp, lane_count,
1199 intel_dsi->burst_mode_ratio);
1200 hsync_sw = pixels_from_txbyteclkhs(hsync_sw, bpp, lane_count,
1201 intel_dsi->burst_mode_ratio);
1202 hbp_sw = pixels_from_txbyteclkhs(hbp_sw, bpp, lane_count,
1203 intel_dsi->burst_mode_ratio);
1204
1205 if (intel_dsi->dual_link) {
1206 hfp_sw *= 2;
1207 hsync_sw *= 2;
1208 hbp_sw *= 2;
1209 }
1210
1211 crtc_htotal_sw = adjusted_mode_sw->crtc_hdisplay + hfp_sw +
1212 hsync_sw + hbp_sw;
1213 crtc_hsync_start_sw = hfp_sw + adjusted_mode_sw->crtc_hdisplay;
1214 crtc_hsync_end_sw = hsync_sw + crtc_hsync_start_sw;
1215 crtc_hblank_start_sw = adjusted_mode_sw->crtc_hdisplay;
1216 crtc_hblank_end_sw = crtc_htotal_sw;
1217
1218 if (adjusted_mode->crtc_htotal == crtc_htotal_sw)
1219 adjusted_mode->crtc_htotal = adjusted_mode_sw->crtc_htotal;
1220
1221 if (adjusted_mode->crtc_hsync_start == crtc_hsync_start_sw)
1222 adjusted_mode->crtc_hsync_start =
1223 adjusted_mode_sw->crtc_hsync_start;
1224
1225 if (adjusted_mode->crtc_hsync_end == crtc_hsync_end_sw)
1226 adjusted_mode->crtc_hsync_end =
1227 adjusted_mode_sw->crtc_hsync_end;
1228
1229 if (adjusted_mode->crtc_hblank_start == crtc_hblank_start_sw)
1230 adjusted_mode->crtc_hblank_start =
1231 adjusted_mode_sw->crtc_hblank_start;
1232
1233 if (adjusted_mode->crtc_hblank_end == crtc_hblank_end_sw)
1234 adjusted_mode->crtc_hblank_end =
1235 adjusted_mode_sw->crtc_hblank_end;
1236}
1237
1238static void intel_dsi_get_config(struct intel_encoder *encoder,
1239 struct intel_crtc_state *pipe_config)
1240{
1241 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1242 u32 pclk;
1243 DRM_DEBUG_KMS("\n");
1244
1245 pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
1246
1247 if (IS_GEN9_LP(dev_priv))
1248 bxt_dsi_get_pipe_config(encoder, pipe_config);
1249
1250 pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp,
1251 pipe_config);
1252 if (!pclk)
1253 return;
1254
1255 pipe_config->base.adjusted_mode.crtc_clock = pclk;
1256 pipe_config->port_clock = pclk;
1257}
1258
1259static enum drm_mode_status
1260intel_dsi_mode_valid(struct drm_connector *connector,
1261 struct drm_display_mode *mode)
1262{
1263 struct intel_connector *intel_connector = to_intel_connector(connector);
1264 const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
1265 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
1266
1267 DRM_DEBUG_KMS("\n");
1268
1269 if (fixed_mode) {
1270 if (mode->hdisplay > fixed_mode->hdisplay)
1271 return MODE_PANEL;
1272 if (mode->vdisplay > fixed_mode->vdisplay)
1273 return MODE_PANEL;
1274 if (fixed_mode->clock > max_dotclk)
1275 return MODE_CLOCK_HIGH;
1276 }
1277
1278 return MODE_OK;
1279}
1280
1281/* return txclkesc cycles in terms of divider and duration in us */
1282static u16 txclkesc(u32 divider, unsigned int us)
1283{
1284 switch (divider) {
1285 case ESCAPE_CLOCK_DIVIDER_1:
1286 default:
1287 return 20 * us;
1288 case ESCAPE_CLOCK_DIVIDER_2:
1289 return 10 * us;
1290 case ESCAPE_CLOCK_DIVIDER_4:
1291 return 5 * us;
1292 }
1293}
1294
1295static void set_dsi_timings(struct drm_encoder *encoder,
1296 const struct drm_display_mode *adjusted_mode)
1297{
1298 struct drm_device *dev = encoder->dev;
1299 struct drm_i915_private *dev_priv = to_i915(dev);
1300 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1301 enum port port;
1302 unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
1303 unsigned int lane_count = intel_dsi->lane_count;
1304
1305 u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
1306
1307 hactive = adjusted_mode->crtc_hdisplay;
1308 hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay;
1309 hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
1310 hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end;
1311
1312 if (intel_dsi->dual_link) {
1313 hactive /= 2;
1314 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
1315 hactive += intel_dsi->pixel_overlap;
1316 hfp /= 2;
1317 hsync /= 2;
1318 hbp /= 2;
1319 }
1320
1321 vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay;
1322 vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
1323 vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end;
1324
1325 /* horizontal values are in terms of high speed byte clock */
1326 hactive = txbyteclkhs(hactive, bpp, lane_count,
1327 intel_dsi->burst_mode_ratio);
1328 hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio);
1329 hsync = txbyteclkhs(hsync, bpp, lane_count,
1330 intel_dsi->burst_mode_ratio);
1331 hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio);
1332
1333 for_each_dsi_port(port, intel_dsi->ports) {
1334 if (IS_GEN9_LP(dev_priv)) {
1335 /*
1336 * Program hdisplay and vdisplay on MIPI transcoder.
1337 * This is different from calculated hactive and
1338 * vactive, as they are calculated per channel basis,
1339 * whereas these values should be based on resolution.
1340 */
1341 I915_WRITE(BXT_MIPI_TRANS_HACTIVE(port),
1342 adjusted_mode->crtc_hdisplay);
1343 I915_WRITE(BXT_MIPI_TRANS_VACTIVE(port),
1344 adjusted_mode->crtc_vdisplay);
1345 I915_WRITE(BXT_MIPI_TRANS_VTOTAL(port),
1346 adjusted_mode->crtc_vtotal);
1347 }
1348
1349 I915_WRITE(MIPI_HACTIVE_AREA_COUNT(port), hactive);
1350 I915_WRITE(MIPI_HFP_COUNT(port), hfp);
1351
1352 /* meaningful for video mode non-burst sync pulse mode only,
1353 * can be zero for non-burst sync events and burst modes */
1354 I915_WRITE(MIPI_HSYNC_PADDING_COUNT(port), hsync);
1355 I915_WRITE(MIPI_HBP_COUNT(port), hbp);
1356
1357 /* vertical values are in terms of lines */
1358 I915_WRITE(MIPI_VFP_COUNT(port), vfp);
1359 I915_WRITE(MIPI_VSYNC_PADDING_COUNT(port), vsync);
1360 I915_WRITE(MIPI_VBP_COUNT(port), vbp);
1361 }
1362}
1363
1364static u32 pixel_format_to_reg(enum mipi_dsi_pixel_format fmt)
1365{
1366 switch (fmt) {
1367 case MIPI_DSI_FMT_RGB888:
1368 return VID_MODE_FORMAT_RGB888;
1369 case MIPI_DSI_FMT_RGB666:
1370 return VID_MODE_FORMAT_RGB666;
1371 case MIPI_DSI_FMT_RGB666_PACKED:
1372 return VID_MODE_FORMAT_RGB666_PACKED;
1373 case MIPI_DSI_FMT_RGB565:
1374 return VID_MODE_FORMAT_RGB565;
1375 default:
1376 MISSING_CASE(fmt);
1377 return VID_MODE_FORMAT_RGB666;
1378 }
1379}
1380
1381static void intel_dsi_prepare(struct intel_encoder *intel_encoder,
1382 const struct intel_crtc_state *pipe_config)
1383{
1384 struct drm_encoder *encoder = &intel_encoder->base;
1385 struct drm_device *dev = encoder->dev;
1386 struct drm_i915_private *dev_priv = to_i915(dev);
1387 struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
1388 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1389 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
1390 enum port port;
1391 unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
1392 u32 val, tmp;
1393 u16 mode_hdisplay;
1394
1395 DRM_DEBUG_KMS("pipe %c\n", pipe_name(intel_crtc->pipe));
1396
1397 mode_hdisplay = adjusted_mode->crtc_hdisplay;
1398
1399 if (intel_dsi->dual_link) {
1400 mode_hdisplay /= 2;
1401 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
1402 mode_hdisplay += intel_dsi->pixel_overlap;
1403 }
1404
1405 for_each_dsi_port(port, intel_dsi->ports) {
1406 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1407 /*
1408 * escape clock divider, 20MHz, shared for A and C.
1409 * device ready must be off when doing this! txclkesc?
1410 */
1411 tmp = I915_READ(MIPI_CTRL(PORT_A));
1412 tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
1413 I915_WRITE(MIPI_CTRL(PORT_A), tmp |
1414 ESCAPE_CLOCK_DIVIDER_1);
1415
1416 /* read request priority is per pipe */
1417 tmp = I915_READ(MIPI_CTRL(port));
1418 tmp &= ~READ_REQUEST_PRIORITY_MASK;
1419 I915_WRITE(MIPI_CTRL(port), tmp |
1420 READ_REQUEST_PRIORITY_HIGH);
1421 } else if (IS_GEN9_LP(dev_priv)) {
1422 enum pipe pipe = intel_crtc->pipe;
1423
1424 tmp = I915_READ(MIPI_CTRL(port));
1425 tmp &= ~BXT_PIPE_SELECT_MASK;
1426
1427 tmp |= BXT_PIPE_SELECT(pipe);
1428 I915_WRITE(MIPI_CTRL(port), tmp);
1429 }
1430
1431 /* XXX: why here, why like this? handling in irq handler?! */
1432 I915_WRITE(MIPI_INTR_STAT(port), 0xffffffff);
1433 I915_WRITE(MIPI_INTR_EN(port), 0xffffffff);
1434
1435 I915_WRITE(MIPI_DPHY_PARAM(port), intel_dsi->dphy_reg);
1436
1437 I915_WRITE(MIPI_DPI_RESOLUTION(port),
1438 adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT |
1439 mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT);
1440 }
1441
1442 set_dsi_timings(encoder, adjusted_mode);
1443
1444 val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
1445 if (is_cmd_mode(intel_dsi)) {
1446 val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
1447 val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
1448 } else {
1449 val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
1450 val |= pixel_format_to_reg(intel_dsi->pixel_format);
1451 }
1452
1453 tmp = 0;
1454 if (intel_dsi->eotp_pkt == 0)
1455 tmp |= EOT_DISABLE;
1456 if (intel_dsi->clock_stop)
1457 tmp |= CLOCKSTOP;
1458
1459 if (IS_GEN9_LP(dev_priv)) {
1460 tmp |= BXT_DPHY_DEFEATURE_EN;
1461 if (!is_cmd_mode(intel_dsi))
1462 tmp |= BXT_DEFEATURE_DPI_FIFO_CTR;
1463 }
1464
1465 for_each_dsi_port(port, intel_dsi->ports) {
1466 I915_WRITE(MIPI_DSI_FUNC_PRG(port), val);
1467
1468 /* timeouts for recovery. one frame IIUC. if counter expires,
1469 * EOT and stop state. */
1470
1471 /*
1472 * In burst mode, value greater than one DPI line Time in byte
1473 * clock (txbyteclkhs) To timeout this timer 1+ of the above
1474 * said value is recommended.
1475 *
1476 * In non-burst mode, Value greater than one DPI frame time in
1477 * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
1478 * said value is recommended.
1479 *
1480 * In DBI only mode, value greater than one DBI frame time in
1481 * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
1482 * said value is recommended.
1483 */
1484
1485 if (is_vid_mode(intel_dsi) &&
1486 intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
1487 I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
1488 txbyteclkhs(adjusted_mode->crtc_htotal, bpp,
1489 intel_dsi->lane_count,
1490 intel_dsi->burst_mode_ratio) + 1);
1491 } else {
1492 I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
1493 txbyteclkhs(adjusted_mode->crtc_vtotal *
1494 adjusted_mode->crtc_htotal,
1495 bpp, intel_dsi->lane_count,
1496 intel_dsi->burst_mode_ratio) + 1);
1497 }
1498 I915_WRITE(MIPI_LP_RX_TIMEOUT(port), intel_dsi->lp_rx_timeout);
1499 I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(port),
1500 intel_dsi->turn_arnd_val);
1501 I915_WRITE(MIPI_DEVICE_RESET_TIMER(port),
1502 intel_dsi->rst_timer_val);
1503
1504 /* dphy stuff */
1505
1506 /* in terms of low power clock */
1507 I915_WRITE(MIPI_INIT_COUNT(port),
1508 txclkesc(intel_dsi->escape_clk_div, 100));
1509
1510 if (IS_GEN9_LP(dev_priv) && (!intel_dsi->dual_link)) {
1511 /*
1512 * BXT spec says write MIPI_INIT_COUNT for
1513 * both the ports, even if only one is
1514 * getting used. So write the other port
1515 * if not in dual link mode.
1516 */
1517 I915_WRITE(MIPI_INIT_COUNT(port ==
1518 PORT_A ? PORT_C : PORT_A),
1519 intel_dsi->init_count);
1520 }
1521
1522 /* recovery disables */
1523 I915_WRITE(MIPI_EOT_DISABLE(port), tmp);
1524
1525 /* in terms of low power clock */
1526 I915_WRITE(MIPI_INIT_COUNT(port), intel_dsi->init_count);
1527
1528 /* in terms of txbyteclkhs. actual high to low switch +
1529 * MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK.
1530 *
1531 * XXX: write MIPI_STOP_STATE_STALL?
1532 */
1533 I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(port),
1534 intel_dsi->hs_to_lp_count);
1535
1536 /* XXX: low power clock equivalence in terms of byte clock.
1537 * the number of byte clocks occupied in one low power clock.
1538 * based on txbyteclkhs and txclkesc.
1539 * txclkesc time / txbyteclk time * (105 + MIPI_STOP_STATE_STALL
1540 * ) / 105.???
1541 */
1542 I915_WRITE(MIPI_LP_BYTECLK(port), intel_dsi->lp_byte_clk);
1543
1544 if (IS_GEMINILAKE(dev_priv)) {
1545 I915_WRITE(MIPI_TLPX_TIME_COUNT(port),
1546 intel_dsi->lp_byte_clk);
1547 /* Shadow of DPHY reg */
1548 I915_WRITE(MIPI_CLK_LANE_TIMING(port),
1549 intel_dsi->dphy_reg);
1550 }
1551
1552 /* the bw essential for transmitting 16 long packets containing
1553 * 252 bytes meant for dcs write memory command is programmed in
1554 * this register in terms of byte clocks. based on dsi transfer
1555 * rate and the number of lanes configured the time taken to
1556 * transmit 16 long packets in a dsi stream varies. */
1557 I915_WRITE(MIPI_DBI_BW_CTRL(port), intel_dsi->bw_timer);
1558
1559 I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(port),
1560 intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT |
1561 intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT);
1562
1563 if (is_vid_mode(intel_dsi))
1564 /* Some panels might have resolution which is not a
1565 * multiple of 64 like 1366 x 768. Enable RANDOM
1566 * resolution support for such panels by default */
1567 I915_WRITE(MIPI_VIDEO_MODE_FORMAT(port),
1568 intel_dsi->video_frmt_cfg_bits |
1569 intel_dsi->video_mode_format |
1570 IP_TG_CONFIG |
1571 RANDOM_DPI_DISPLAY_RESOLUTION);
1572 }
1573}
1574
1575static void intel_dsi_unprepare(struct intel_encoder *encoder)
1576{
1577 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1578 struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
1579 enum port port;
1580 u32 val;
1581
1582 if (!IS_GEMINILAKE(dev_priv)) {
1583 for_each_dsi_port(port, intel_dsi->ports) {
1584 /* Panel commands can be sent when clock is in LP11 */
1585 I915_WRITE(MIPI_DEVICE_READY(port), 0x0);
1586
1587 intel_dsi_reset_clocks(encoder, port);
1588 I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP);
1589
1590 val = I915_READ(MIPI_DSI_FUNC_PRG(port));
1591 val &= ~VID_MODE_FORMAT_MASK;
1592 I915_WRITE(MIPI_DSI_FUNC_PRG(port), val);
1593
1594 I915_WRITE(MIPI_DEVICE_READY(port), 0x1);
1595 }
1596 }
1597}
1598
1599static int intel_dsi_get_modes(struct drm_connector *connector)
1600{
1601 struct intel_connector *intel_connector = to_intel_connector(connector);
1602 struct drm_display_mode *mode;
1603
1604 DRM_DEBUG_KMS("\n");
1605
1606 if (!intel_connector->panel.fixed_mode) {
1607 DRM_DEBUG_KMS("no fixed mode\n");
1608 return 0;
1609 }
1610
1611 mode = drm_mode_duplicate(connector->dev,
1612 intel_connector->panel.fixed_mode);
1613 if (!mode) {
1614 DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
1615 return 0;
1616 }
1617
1618 drm_mode_probed_add(connector, mode);
1619 return 1;
1620}
1621
1622static void intel_dsi_connector_destroy(struct drm_connector *connector)
1623{
1624 struct intel_connector *intel_connector = to_intel_connector(connector);
1625
1626 DRM_DEBUG_KMS("\n");
1627 intel_panel_fini(&intel_connector->panel);
1628 drm_connector_cleanup(connector);
1629 kfree(connector);
1630}
1631
1632static void intel_dsi_encoder_destroy(struct drm_encoder *encoder)
1633{
1634 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1635
1636 /* dispose of the gpios */
1637 if (intel_dsi->gpio_panel)
1638 gpiod_put(intel_dsi->gpio_panel);
1639
1640 intel_encoder_destroy(encoder);
1641}
1642
1643static const struct drm_encoder_funcs intel_dsi_funcs = {
1644 .destroy = intel_dsi_encoder_destroy,
1645};
1646
1647static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = {
1648 .get_modes = intel_dsi_get_modes,
1649 .mode_valid = intel_dsi_mode_valid,
1650 .atomic_check = intel_digital_connector_atomic_check,
1651};
1652
1653static const struct drm_connector_funcs intel_dsi_connector_funcs = {
1654 .late_register = intel_connector_register,
1655 .early_unregister = intel_connector_unregister,
1656 .destroy = intel_dsi_connector_destroy,
1657 .fill_modes = drm_helper_probe_single_connector_modes,
1658 .atomic_get_property = intel_digital_connector_atomic_get_property,
1659 .atomic_set_property = intel_digital_connector_atomic_set_property,
1660 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1661 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
1662};
1663
1664static int intel_dsi_get_panel_orientation(struct intel_connector *connector)
1665{
1666 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
1667 int orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL;
1668 enum i9xx_plane_id plane;
1669 u32 val;
1670
1671 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1672 if (connector->encoder->crtc_mask == BIT(PIPE_B))
1673 plane = PLANE_B;
1674 else
1675 plane = PLANE_A;
1676
1677 val = I915_READ(DSPCNTR(plane));
1678 if (val & DISPPLANE_ROTATE_180)
1679 orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
1680 }
1681
1682 return orientation;
1683}
1684
1685static void intel_dsi_add_properties(struct intel_connector *connector)
1686{
1687 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
1688
1689 if (connector->panel.fixed_mode) {
1690 u32 allowed_scalers;
1691
1692 allowed_scalers = BIT(DRM_MODE_SCALE_ASPECT) | BIT(DRM_MODE_SCALE_FULLSCREEN);
1693 if (!HAS_GMCH_DISPLAY(dev_priv))
1694 allowed_scalers |= BIT(DRM_MODE_SCALE_CENTER);
1695
1696 drm_connector_attach_scaling_mode_property(&connector->base,
1697 allowed_scalers);
1698
1699 connector->base.state->scaling_mode = DRM_MODE_SCALE_ASPECT;
1700
1701 connector->base.display_info.panel_orientation =
1702 intel_dsi_get_panel_orientation(connector);
1703 drm_connector_init_panel_orientation_property(
1704 &connector->base,
1705 connector->panel.fixed_mode->hdisplay,
1706 connector->panel.fixed_mode->vdisplay);
1707 }
1708}
1709
1710void intel_dsi_init(struct drm_i915_private *dev_priv)
1711{
1712 struct drm_device *dev = &dev_priv->drm;
1713 struct intel_dsi *intel_dsi;
1714 struct intel_encoder *intel_encoder;
1715 struct drm_encoder *encoder;
1716 struct intel_connector *intel_connector;
1717 struct drm_connector *connector;
1718 struct drm_display_mode *scan, *fixed_mode = NULL;
1719 enum port port;
1720
1721 DRM_DEBUG_KMS("\n");
1722
1723 /* There is no detection method for MIPI so rely on VBT */
1724 if (!intel_bios_is_dsi_present(dev_priv, &port))
1725 return;
1726
1727 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1728 dev_priv->mipi_mmio_base = VLV_MIPI_BASE;
1729 } else if (IS_GEN9_LP(dev_priv)) {
1730 dev_priv->mipi_mmio_base = BXT_MIPI_BASE;
1731 } else {
1732 DRM_ERROR("Unsupported Mipi device to reg base");
1733 return;
1734 }
1735
1736 intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL);
1737 if (!intel_dsi)
1738 return;
1739
1740 intel_connector = intel_connector_alloc();
1741 if (!intel_connector) {
1742 kfree(intel_dsi);
1743 return;
1744 }
1745
1746 intel_encoder = &intel_dsi->base;
1747 encoder = &intel_encoder->base;
1748 intel_dsi->attached_connector = intel_connector;
1749
1750 connector = &intel_connector->base;
1751
1752 drm_encoder_init(dev, encoder, &intel_dsi_funcs, DRM_MODE_ENCODER_DSI,
1753 "DSI %c", port_name(port));
1754
1755 intel_encoder->compute_config = intel_dsi_compute_config;
1756 intel_encoder->pre_enable = intel_dsi_pre_enable;
1757 intel_encoder->enable = intel_dsi_enable_nop;
1758 intel_encoder->disable = intel_dsi_disable;
1759 intel_encoder->post_disable = intel_dsi_post_disable;
1760 intel_encoder->get_hw_state = intel_dsi_get_hw_state;
1761 intel_encoder->get_config = intel_dsi_get_config;
1762
1763 intel_connector->get_hw_state = intel_connector_get_hw_state;
1764
1765 intel_encoder->port = port;
1766
1767 /*
1768 * On BYT/CHV, pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI
1769 * port C. BXT isn't limited like this.
1770 */
1771 if (IS_GEN9_LP(dev_priv))
1772 intel_encoder->crtc_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C);
1773 else if (port == PORT_A)
1774 intel_encoder->crtc_mask = BIT(PIPE_A);
1775 else
1776 intel_encoder->crtc_mask = BIT(PIPE_B);
1777
1778 if (dev_priv->vbt.dsi.config->dual_link)
1779 intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
1780 else
1781 intel_dsi->ports = BIT(port);
1782
1783 intel_dsi->dcs_backlight_ports = dev_priv->vbt.dsi.bl_ports;
1784 intel_dsi->dcs_cabc_ports = dev_priv->vbt.dsi.cabc_ports;
1785
1786 /* Create a DSI host (and a device) for each port. */
1787 for_each_dsi_port(port, intel_dsi->ports) {
1788 struct intel_dsi_host *host;
1789
1790 host = intel_dsi_host_init(intel_dsi, port);
1791 if (!host)
1792 goto err;
1793
1794 intel_dsi->dsi_hosts[port] = host;
1795 }
1796
1797 if (!intel_dsi_vbt_init(intel_dsi, MIPI_DSI_GENERIC_PANEL_ID)) {
1798 DRM_DEBUG_KMS("no device found\n");
1799 goto err;
1800 }
1801
1802 /*
1803 * In case of BYT with CRC PMIC, we need to use GPIO for
1804 * Panel control.
1805 */
1806 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
1807 (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC)) {
1808 intel_dsi->gpio_panel =
1809 gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH);
1810
1811 if (IS_ERR(intel_dsi->gpio_panel)) {
1812 DRM_ERROR("Failed to own gpio for panel control\n");
1813 intel_dsi->gpio_panel = NULL;
1814 }
1815 }
1816
1817 intel_encoder->type = INTEL_OUTPUT_DSI;
1818 intel_encoder->power_domain = POWER_DOMAIN_PORT_DSI;
1819 intel_encoder->cloneable = 0;
1820 drm_connector_init(dev, connector, &intel_dsi_connector_funcs,
1821 DRM_MODE_CONNECTOR_DSI);
1822
1823 drm_connector_helper_add(connector, &intel_dsi_connector_helper_funcs);
1824
1825 connector->display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/
1826 connector->interlace_allowed = false;
1827 connector->doublescan_allowed = false;
1828
1829 intel_connector_attach_encoder(intel_connector, intel_encoder);
1830
1831 mutex_lock(&dev->mode_config.mutex);
1832 intel_dsi_vbt_get_modes(intel_dsi);
1833 list_for_each_entry(scan, &connector->probed_modes, head) {
1834 if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
1835 fixed_mode = drm_mode_duplicate(dev, scan);
1836 break;
1837 }
1838 }
1839 mutex_unlock(&dev->mode_config.mutex);
1840
1841 if (!fixed_mode) {
1842 DRM_DEBUG_KMS("no fixed mode\n");
1843 goto err;
1844 }
1845
1846 connector->display_info.width_mm = fixed_mode->width_mm;
1847 connector->display_info.height_mm = fixed_mode->height_mm;
1848
1849 intel_panel_init(&intel_connector->panel, fixed_mode, NULL, NULL);
1850 intel_panel_setup_backlight(connector, INVALID_PIPE);
1851
1852 intel_dsi_add_properties(intel_connector);
1853
1854 return;
1855
1856err:
1857 drm_encoder_cleanup(&intel_encoder->base);
1858 kfree(intel_dsi);
1859 kfree(intel_connector);
1860}