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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 <linux/dmi.h>
27#include <linux/slab.h>
28
29#include <drm/drm_atomic_helper.h>
30#include <drm/drm_crtc.h>
31#include <drm/drm_edid.h>
32#include <drm/drm_mipi_dsi.h>
33#include <drm/drm_probe_helper.h>
34
35#include "i915_drv.h"
36#include "i915_reg.h"
37#include "intel_atomic.h"
38#include "intel_backlight.h"
39#include "intel_connector.h"
40#include "intel_crtc.h"
41#include "intel_de.h"
42#include "intel_display_types.h"
43#include "intel_dsi.h"
44#include "intel_dsi_vbt.h"
45#include "intel_fifo_underrun.h"
46#include "intel_panel.h"
47#include "intel_pfit.h"
48#include "skl_scaler.h"
49#include "vlv_dsi.h"
50#include "vlv_dsi_pll.h"
51#include "vlv_dsi_regs.h"
52#include "vlv_sideband.h"
53
54/* return pixels in terms of txbyteclkhs */
55static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
56 u16 burst_mode_ratio)
57{
58 return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
59 8 * 100), lane_count);
60}
61
62/* return pixels equvalent to txbyteclkhs */
63static u16 pixels_from_txbyteclkhs(u16 clk_hs, int bpp, int lane_count,
64 u16 burst_mode_ratio)
65{
66 return DIV_ROUND_UP((clk_hs * lane_count * 8 * 100),
67 (bpp * burst_mode_ratio));
68}
69
70enum mipi_dsi_pixel_format pixel_format_from_register_bits(u32 fmt)
71{
72 /* It just so happens the VBT matches register contents. */
73 switch (fmt) {
74 case VID_MODE_FORMAT_RGB888:
75 return MIPI_DSI_FMT_RGB888;
76 case VID_MODE_FORMAT_RGB666:
77 return MIPI_DSI_FMT_RGB666;
78 case VID_MODE_FORMAT_RGB666_PACKED:
79 return MIPI_DSI_FMT_RGB666_PACKED;
80 case VID_MODE_FORMAT_RGB565:
81 return MIPI_DSI_FMT_RGB565;
82 default:
83 MISSING_CASE(fmt);
84 return MIPI_DSI_FMT_RGB666;
85 }
86}
87
88void vlv_dsi_wait_for_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
89{
90 struct intel_display *display = to_intel_display(&intel_dsi->base);
91 u32 mask;
92
93 mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
94 LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
95
96 if (intel_de_wait_for_set(display, MIPI_GEN_FIFO_STAT(display, port),
97 mask, 100))
98 drm_err(display->drm, "DPI FIFOs are not empty\n");
99}
100
101static void write_data(struct intel_display *display,
102 i915_reg_t reg,
103 const u8 *data, u32 len)
104{
105 u32 i, j;
106
107 for (i = 0; i < len; i += 4) {
108 u32 val = 0;
109
110 for (j = 0; j < min_t(u32, len - i, 4); j++)
111 val |= *data++ << 8 * j;
112
113 intel_de_write(display, reg, val);
114 }
115}
116
117static void read_data(struct intel_display *display,
118 i915_reg_t reg,
119 u8 *data, u32 len)
120{
121 u32 i, j;
122
123 for (i = 0; i < len; i += 4) {
124 u32 val = intel_de_read(display, reg);
125
126 for (j = 0; j < min_t(u32, len - i, 4); j++)
127 *data++ = val >> 8 * j;
128 }
129}
130
131static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host,
132 const struct mipi_dsi_msg *msg)
133{
134 struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host);
135 struct intel_dsi *intel_dsi = intel_dsi_host->intel_dsi;
136 struct intel_display *display = to_intel_display(&intel_dsi->base);
137 enum port port = intel_dsi_host->port;
138 struct mipi_dsi_packet packet;
139 ssize_t ret;
140 const u8 *header;
141 i915_reg_t data_reg, ctrl_reg;
142 u32 data_mask, ctrl_mask;
143
144 ret = mipi_dsi_create_packet(&packet, msg);
145 if (ret < 0)
146 return ret;
147
148 header = packet.header;
149
150 if (msg->flags & MIPI_DSI_MSG_USE_LPM) {
151 data_reg = MIPI_LP_GEN_DATA(display, port);
152 data_mask = LP_DATA_FIFO_FULL;
153 ctrl_reg = MIPI_LP_GEN_CTRL(display, port);
154 ctrl_mask = LP_CTRL_FIFO_FULL;
155 } else {
156 data_reg = MIPI_HS_GEN_DATA(display, port);
157 data_mask = HS_DATA_FIFO_FULL;
158 ctrl_reg = MIPI_HS_GEN_CTRL(display, port);
159 ctrl_mask = HS_CTRL_FIFO_FULL;
160 }
161
162 /* note: this is never true for reads */
163 if (packet.payload_length) {
164 if (intel_de_wait_for_clear(display, MIPI_GEN_FIFO_STAT(display, port),
165 data_mask, 50))
166 drm_err(display->drm,
167 "Timeout waiting for HS/LP DATA FIFO !full\n");
168
169 write_data(display, data_reg, packet.payload,
170 packet.payload_length);
171 }
172
173 if (msg->rx_len) {
174 intel_de_write(display, MIPI_INTR_STAT(display, port),
175 GEN_READ_DATA_AVAIL);
176 }
177
178 if (intel_de_wait_for_clear(display, MIPI_GEN_FIFO_STAT(display, port),
179 ctrl_mask, 50)) {
180 drm_err(display->drm,
181 "Timeout waiting for HS/LP CTRL FIFO !full\n");
182 }
183
184 intel_de_write(display, ctrl_reg,
185 header[2] << 16 | header[1] << 8 | header[0]);
186
187 /* ->rx_len is set only for reads */
188 if (msg->rx_len) {
189 data_mask = GEN_READ_DATA_AVAIL;
190 if (intel_de_wait_for_set(display, MIPI_INTR_STAT(display, port),
191 data_mask, 50))
192 drm_err(display->drm,
193 "Timeout waiting for read data.\n");
194
195 read_data(display, data_reg, msg->rx_buf, msg->rx_len);
196 }
197
198 /* XXX: fix for reads and writes */
199 return 4 + packet.payload_length;
200}
201
202static int intel_dsi_host_attach(struct mipi_dsi_host *host,
203 struct mipi_dsi_device *dsi)
204{
205 return 0;
206}
207
208static int intel_dsi_host_detach(struct mipi_dsi_host *host,
209 struct mipi_dsi_device *dsi)
210{
211 return 0;
212}
213
214static const struct mipi_dsi_host_ops intel_dsi_host_ops = {
215 .attach = intel_dsi_host_attach,
216 .detach = intel_dsi_host_detach,
217 .transfer = intel_dsi_host_transfer,
218};
219
220/*
221 * send a video mode command
222 *
223 * XXX: commands with data in MIPI_DPI_DATA?
224 */
225static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs,
226 enum port port)
227{
228 struct intel_display *display = to_intel_display(&intel_dsi->base);
229 u32 mask;
230
231 /* XXX: pipe, hs */
232 if (hs)
233 cmd &= ~DPI_LP_MODE;
234 else
235 cmd |= DPI_LP_MODE;
236
237 /* clear bit */
238 intel_de_write(display, MIPI_INTR_STAT(display, port), SPL_PKT_SENT_INTERRUPT);
239
240 /* XXX: old code skips write if control unchanged */
241 if (cmd == intel_de_read(display, MIPI_DPI_CONTROL(display, port)))
242 drm_dbg_kms(display->drm,
243 "Same special packet %02x twice in a row.\n", cmd);
244
245 intel_de_write(display, MIPI_DPI_CONTROL(display, port), cmd);
246
247 mask = SPL_PKT_SENT_INTERRUPT;
248 if (intel_de_wait_for_set(display, MIPI_INTR_STAT(display, port), mask, 100))
249 drm_err(display->drm,
250 "Video mode command 0x%08x send failed.\n", cmd);
251
252 return 0;
253}
254
255static void band_gap_reset(struct drm_i915_private *dev_priv)
256{
257 vlv_flisdsi_get(dev_priv);
258
259 vlv_flisdsi_write(dev_priv, 0x08, 0x0001);
260 vlv_flisdsi_write(dev_priv, 0x0F, 0x0005);
261 vlv_flisdsi_write(dev_priv, 0x0F, 0x0025);
262 udelay(150);
263 vlv_flisdsi_write(dev_priv, 0x0F, 0x0000);
264 vlv_flisdsi_write(dev_priv, 0x08, 0x0000);
265
266 vlv_flisdsi_put(dev_priv);
267}
268
269static int intel_dsi_compute_config(struct intel_encoder *encoder,
270 struct intel_crtc_state *pipe_config,
271 struct drm_connector_state *conn_state)
272{
273 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
274 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
275 struct intel_connector *intel_connector = intel_dsi->attached_connector;
276 struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
277 int ret;
278
279 drm_dbg_kms(&dev_priv->drm, "\n");
280 pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
281 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
282
283 ret = intel_panel_compute_config(intel_connector, adjusted_mode);
284 if (ret)
285 return ret;
286
287 ret = intel_panel_fitting(pipe_config, conn_state);
288 if (ret)
289 return ret;
290
291 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
292 return -EINVAL;
293
294 /* DSI uses short packets for sync events, so clear mode flags for DSI */
295 adjusted_mode->flags = 0;
296
297 if (intel_dsi->pixel_format == MIPI_DSI_FMT_RGB888)
298 pipe_config->pipe_bpp = 24;
299 else
300 pipe_config->pipe_bpp = 18;
301
302 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
303 /* Enable Frame time stamp based scanline reporting */
304 pipe_config->mode_flags |=
305 I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
306
307 /* Dual link goes to DSI transcoder A. */
308 if (intel_dsi->ports == BIT(PORT_C))
309 pipe_config->cpu_transcoder = TRANSCODER_DSI_C;
310 else
311 pipe_config->cpu_transcoder = TRANSCODER_DSI_A;
312
313 ret = bxt_dsi_pll_compute(encoder, pipe_config);
314 if (ret)
315 return -EINVAL;
316 } else {
317 ret = vlv_dsi_pll_compute(encoder, pipe_config);
318 if (ret)
319 return -EINVAL;
320 }
321
322 pipe_config->clock_set = true;
323
324 return 0;
325}
326
327static bool glk_dsi_enable_io(struct intel_encoder *encoder)
328{
329 struct intel_display *display = to_intel_display(encoder);
330 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
331 enum port port;
332 bool cold_boot = false;
333
334 /* Set the MIPI mode
335 * If MIPI_Mode is off, then writing to LP_Wake bit is not reflecting.
336 * Power ON MIPI IO first and then write into IO reset and LP wake bits
337 */
338 for_each_dsi_port(port, intel_dsi->ports)
339 intel_de_rmw(display, MIPI_CTRL(display, port), 0, GLK_MIPIIO_ENABLE);
340
341 /* Put the IO into reset */
342 intel_de_rmw(display, MIPI_CTRL(display, PORT_A), GLK_MIPIIO_RESET_RELEASED, 0);
343
344 /* Program LP Wake */
345 for_each_dsi_port(port, intel_dsi->ports) {
346 u32 tmp = intel_de_read(display, MIPI_DEVICE_READY(display, port));
347
348 intel_de_rmw(display, MIPI_CTRL(display, port),
349 GLK_LP_WAKE, (tmp & DEVICE_READY) ? GLK_LP_WAKE : 0);
350 }
351
352 /* Wait for Pwr ACK */
353 for_each_dsi_port(port, intel_dsi->ports) {
354 if (intel_de_wait_for_set(display, MIPI_CTRL(display, port),
355 GLK_MIPIIO_PORT_POWERED, 20))
356 drm_err(display->drm, "MIPIO port is powergated\n");
357 }
358
359 /* Check for cold boot scenario */
360 for_each_dsi_port(port, intel_dsi->ports) {
361 cold_boot |=
362 !(intel_de_read(display, MIPI_DEVICE_READY(display, port)) & DEVICE_READY);
363 }
364
365 return cold_boot;
366}
367
368static void glk_dsi_device_ready(struct intel_encoder *encoder)
369{
370 struct intel_display *display = to_intel_display(encoder);
371 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
372 enum port port;
373
374 /* Wait for MIPI PHY status bit to set */
375 for_each_dsi_port(port, intel_dsi->ports) {
376 if (intel_de_wait_for_set(display, MIPI_CTRL(display, port),
377 GLK_PHY_STATUS_PORT_READY, 20))
378 drm_err(display->drm, "PHY is not ON\n");
379 }
380
381 /* Get IO out of reset */
382 intel_de_rmw(display, MIPI_CTRL(display, PORT_A), 0, GLK_MIPIIO_RESET_RELEASED);
383
384 /* Get IO out of Low power state*/
385 for_each_dsi_port(port, intel_dsi->ports) {
386 if (!(intel_de_read(display, MIPI_DEVICE_READY(display, port)) & DEVICE_READY)) {
387 intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
388 ULPS_STATE_MASK, DEVICE_READY);
389 usleep_range(10, 15);
390 } else {
391 /* Enter ULPS */
392 intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
393 ULPS_STATE_MASK, ULPS_STATE_ENTER | DEVICE_READY);
394
395 /* Wait for ULPS active */
396 if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
397 GLK_ULPS_NOT_ACTIVE, 20))
398 drm_err(display->drm, "ULPS not active\n");
399
400 /* Exit ULPS */
401 intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
402 ULPS_STATE_MASK, ULPS_STATE_EXIT | DEVICE_READY);
403
404 /* Enter Normal Mode */
405 intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
406 ULPS_STATE_MASK,
407 ULPS_STATE_NORMAL_OPERATION | DEVICE_READY);
408
409 intel_de_rmw(display, MIPI_CTRL(display, port), GLK_LP_WAKE, 0);
410 }
411 }
412
413 /* Wait for Stop state */
414 for_each_dsi_port(port, intel_dsi->ports) {
415 if (intel_de_wait_for_set(display, MIPI_CTRL(display, port),
416 GLK_DATA_LANE_STOP_STATE, 20))
417 drm_err(display->drm,
418 "Date lane not in STOP state\n");
419 }
420
421 /* Wait for AFE LATCH */
422 for_each_dsi_port(port, intel_dsi->ports) {
423 if (intel_de_wait_for_set(display, BXT_MIPI_PORT_CTRL(port),
424 AFE_LATCHOUT, 20))
425 drm_err(display->drm,
426 "D-PHY not entering LP-11 state\n");
427 }
428}
429
430static void bxt_dsi_device_ready(struct intel_encoder *encoder)
431{
432 struct intel_display *display = to_intel_display(encoder);
433 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
434 enum port port;
435 u32 val;
436
437 drm_dbg_kms(display->drm, "\n");
438
439 /* Enable MIPI PHY transparent latch */
440 for_each_dsi_port(port, intel_dsi->ports) {
441 intel_de_rmw(display, BXT_MIPI_PORT_CTRL(port), 0, LP_OUTPUT_HOLD);
442 usleep_range(2000, 2500);
443 }
444
445 /* Clear ULPS and set device ready */
446 for_each_dsi_port(port, intel_dsi->ports) {
447 val = intel_de_read(display, MIPI_DEVICE_READY(display, port));
448 val &= ~ULPS_STATE_MASK;
449 intel_de_write(display, MIPI_DEVICE_READY(display, port), val);
450 usleep_range(2000, 2500);
451 val |= DEVICE_READY;
452 intel_de_write(display, MIPI_DEVICE_READY(display, port), val);
453 }
454}
455
456static void vlv_dsi_device_ready(struct intel_encoder *encoder)
457{
458 struct intel_display *display = to_intel_display(encoder);
459 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
460 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
461 enum port port;
462
463 drm_dbg_kms(display->drm, "\n");
464
465 vlv_flisdsi_get(dev_priv);
466 /* program rcomp for compliance, reduce from 50 ohms to 45 ohms
467 * needed everytime after power gate */
468 vlv_flisdsi_write(dev_priv, 0x04, 0x0004);
469 vlv_flisdsi_put(dev_priv);
470
471 /* bandgap reset is needed after everytime we do power gate */
472 band_gap_reset(dev_priv);
473
474 for_each_dsi_port(port, intel_dsi->ports) {
475
476 intel_de_write(display, MIPI_DEVICE_READY(display, port),
477 ULPS_STATE_ENTER);
478 usleep_range(2500, 3000);
479
480 /* Enable MIPI PHY transparent latch
481 * Common bit for both MIPI Port A & MIPI Port C
482 * No similar bit in MIPI Port C reg
483 */
484 intel_de_rmw(display, VLV_MIPI_PORT_CTRL(PORT_A), 0, LP_OUTPUT_HOLD);
485 usleep_range(1000, 1500);
486
487 intel_de_write(display, MIPI_DEVICE_READY(display, port),
488 ULPS_STATE_EXIT);
489 usleep_range(2500, 3000);
490
491 intel_de_write(display, MIPI_DEVICE_READY(display, port),
492 DEVICE_READY);
493 usleep_range(2500, 3000);
494 }
495}
496
497static void intel_dsi_device_ready(struct intel_encoder *encoder)
498{
499 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
500
501 if (IS_GEMINILAKE(dev_priv))
502 glk_dsi_device_ready(encoder);
503 else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
504 bxt_dsi_device_ready(encoder);
505 else
506 vlv_dsi_device_ready(encoder);
507}
508
509static void glk_dsi_enter_low_power_mode(struct intel_encoder *encoder)
510{
511 struct intel_display *display = to_intel_display(encoder);
512 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
513 enum port port;
514
515 /* Enter ULPS */
516 for_each_dsi_port(port, intel_dsi->ports)
517 intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
518 ULPS_STATE_MASK, ULPS_STATE_ENTER | DEVICE_READY);
519
520 /* Wait for MIPI PHY status bit to unset */
521 for_each_dsi_port(port, intel_dsi->ports) {
522 if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
523 GLK_PHY_STATUS_PORT_READY, 20))
524 drm_err(display->drm, "PHY is not turning OFF\n");
525 }
526
527 /* Wait for Pwr ACK bit to unset */
528 for_each_dsi_port(port, intel_dsi->ports) {
529 if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
530 GLK_MIPIIO_PORT_POWERED, 20))
531 drm_err(display->drm,
532 "MIPI IO Port is not powergated\n");
533 }
534}
535
536static void glk_dsi_disable_mipi_io(struct intel_encoder *encoder)
537{
538 struct intel_display *display = to_intel_display(encoder);
539 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
540 enum port port;
541
542 /* Put the IO into reset */
543 intel_de_rmw(display, MIPI_CTRL(display, PORT_A), GLK_MIPIIO_RESET_RELEASED, 0);
544
545 /* Wait for MIPI PHY status bit to unset */
546 for_each_dsi_port(port, intel_dsi->ports) {
547 if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
548 GLK_PHY_STATUS_PORT_READY, 20))
549 drm_err(display->drm, "PHY is not turning OFF\n");
550 }
551
552 /* Clear MIPI mode */
553 for_each_dsi_port(port, intel_dsi->ports)
554 intel_de_rmw(display, MIPI_CTRL(display, port), GLK_MIPIIO_ENABLE, 0);
555}
556
557static void glk_dsi_clear_device_ready(struct intel_encoder *encoder)
558{
559 glk_dsi_enter_low_power_mode(encoder);
560 glk_dsi_disable_mipi_io(encoder);
561}
562
563static i915_reg_t port_ctrl_reg(struct drm_i915_private *i915, enum port port)
564{
565 return IS_GEMINILAKE(i915) || IS_BROXTON(i915) ?
566 BXT_MIPI_PORT_CTRL(port) : VLV_MIPI_PORT_CTRL(port);
567}
568
569static void vlv_dsi_clear_device_ready(struct intel_encoder *encoder)
570{
571 struct intel_display *display = to_intel_display(encoder);
572 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
573 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
574 enum port port;
575
576 drm_dbg_kms(display->drm, "\n");
577 for_each_dsi_port(port, intel_dsi->ports) {
578 /* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */
579 i915_reg_t port_ctrl = IS_BROXTON(dev_priv) ?
580 BXT_MIPI_PORT_CTRL(port) : VLV_MIPI_PORT_CTRL(PORT_A);
581
582 intel_de_write(display, MIPI_DEVICE_READY(display, port),
583 DEVICE_READY | ULPS_STATE_ENTER);
584 usleep_range(2000, 2500);
585
586 intel_de_write(display, MIPI_DEVICE_READY(display, port),
587 DEVICE_READY | ULPS_STATE_EXIT);
588 usleep_range(2000, 2500);
589
590 intel_de_write(display, MIPI_DEVICE_READY(display, port),
591 DEVICE_READY | ULPS_STATE_ENTER);
592 usleep_range(2000, 2500);
593
594 /*
595 * On VLV/CHV, wait till Clock lanes are in LP-00 state for MIPI
596 * Port A only. MIPI Port C has no similar bit for checking.
597 */
598 if ((IS_BROXTON(dev_priv) || port == PORT_A) &&
599 intel_de_wait_for_clear(display, port_ctrl,
600 AFE_LATCHOUT, 30))
601 drm_err(display->drm, "DSI LP not going Low\n");
602
603 /* Disable MIPI PHY transparent latch */
604 intel_de_rmw(display, port_ctrl, LP_OUTPUT_HOLD, 0);
605 usleep_range(1000, 1500);
606
607 intel_de_write(display, MIPI_DEVICE_READY(display, port), 0x00);
608 usleep_range(2000, 2500);
609 }
610}
611
612static void intel_dsi_port_enable(struct intel_encoder *encoder,
613 const struct intel_crtc_state *crtc_state)
614{
615 struct intel_display *display = to_intel_display(encoder);
616 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
617 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
618 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
619 enum port port;
620
621 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
622 u32 temp = intel_dsi->pixel_overlap;
623
624 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
625 for_each_dsi_port(port, intel_dsi->ports)
626 intel_de_rmw(display, MIPI_CTRL(display, port),
627 BXT_PIXEL_OVERLAP_CNT_MASK,
628 temp << BXT_PIXEL_OVERLAP_CNT_SHIFT);
629 } else {
630 intel_de_rmw(display, VLV_CHICKEN_3,
631 PIXEL_OVERLAP_CNT_MASK,
632 temp << PIXEL_OVERLAP_CNT_SHIFT);
633 }
634 }
635
636 for_each_dsi_port(port, intel_dsi->ports) {
637 i915_reg_t port_ctrl = port_ctrl_reg(dev_priv, port);
638 u32 temp;
639
640 temp = intel_de_read(display, port_ctrl);
641
642 temp &= ~LANE_CONFIGURATION_MASK;
643 temp &= ~DUAL_LINK_MODE_MASK;
644
645 if (intel_dsi->ports == (BIT(PORT_A) | BIT(PORT_C))) {
646 temp |= (intel_dsi->dual_link - 1)
647 << DUAL_LINK_MODE_SHIFT;
648 if (IS_BROXTON(dev_priv))
649 temp |= LANE_CONFIGURATION_DUAL_LINK_A;
650 else
651 temp |= crtc->pipe ?
652 LANE_CONFIGURATION_DUAL_LINK_B :
653 LANE_CONFIGURATION_DUAL_LINK_A;
654 }
655
656 if (intel_dsi->pixel_format != MIPI_DSI_FMT_RGB888)
657 temp |= DITHERING_ENABLE;
658
659 /* assert ip_tg_enable signal */
660 intel_de_write(display, port_ctrl, temp | DPI_ENABLE);
661 intel_de_posting_read(display, port_ctrl);
662 }
663}
664
665static void intel_dsi_port_disable(struct intel_encoder *encoder)
666{
667 struct intel_display *display = to_intel_display(encoder);
668 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
669 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
670 enum port port;
671
672 for_each_dsi_port(port, intel_dsi->ports) {
673 i915_reg_t port_ctrl = port_ctrl_reg(dev_priv, port);
674
675 /* de-assert ip_tg_enable signal */
676 intel_de_rmw(display, port_ctrl, DPI_ENABLE, 0);
677 intel_de_posting_read(display, port_ctrl);
678 }
679}
680
681static void intel_dsi_prepare(struct intel_encoder *encoder,
682 const struct intel_crtc_state *pipe_config);
683static void intel_dsi_unprepare(struct intel_encoder *encoder);
684
685/*
686 * Panel enable/disable sequences from the VBT spec.
687 *
688 * Note the spec has AssertReset / DeassertReset swapped from their
689 * usual naming. We use the normal names to avoid confusion (so below
690 * they are swapped compared to the spec).
691 *
692 * Steps starting with MIPI refer to VBT sequences, note that for v2
693 * VBTs several steps which have a VBT in v2 are expected to be handled
694 * directly by the driver, by directly driving gpios for example.
695 *
696 * v2 video mode seq v3 video mode seq command mode seq
697 * - power on - MIPIPanelPowerOn - power on
698 * - wait t1+t2 - wait t1+t2
699 * - MIPIDeassertResetPin - MIPIDeassertResetPin - MIPIDeassertResetPin
700 * - io lines to lp-11 - io lines to lp-11 - io lines to lp-11
701 * - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds
702 * - MIPITearOn
703 * - MIPIDisplayOn
704 * - turn on DPI - turn on DPI - set pipe to dsr mode
705 * - MIPIDisplayOn - MIPIDisplayOn
706 * - wait t5 - wait t5
707 * - backlight on - MIPIBacklightOn - backlight on
708 * ... ... ... issue mem cmds ...
709 * - backlight off - MIPIBacklightOff - backlight off
710 * - wait t6 - wait t6
711 * - MIPIDisplayOff
712 * - turn off DPI - turn off DPI - disable pipe dsr mode
713 * - MIPITearOff
714 * - MIPIDisplayOff - MIPIDisplayOff
715 * - io lines to lp-00 - io lines to lp-00 - io lines to lp-00
716 * - MIPIAssertResetPin - MIPIAssertResetPin - MIPIAssertResetPin
717 * - wait t3 - wait t3
718 * - power off - MIPIPanelPowerOff - power off
719 * - wait t4 - wait t4
720 */
721
722/*
723 * DSI port enable has to be done before pipe and plane enable, so we do it in
724 * the pre_enable hook instead of the enable hook.
725 */
726static void intel_dsi_pre_enable(struct intel_atomic_state *state,
727 struct intel_encoder *encoder,
728 const struct intel_crtc_state *pipe_config,
729 const struct drm_connector_state *conn_state)
730{
731 struct intel_display *display = to_intel_display(encoder);
732 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
733 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
734 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
735 enum pipe pipe = crtc->pipe;
736 enum port port;
737 bool glk_cold_boot = false;
738
739 drm_dbg_kms(display->drm, "\n");
740
741 intel_dsi_wait_panel_power_cycle(intel_dsi);
742
743 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
744
745 /*
746 * The BIOS may leave the PLL in a wonky state where it doesn't
747 * lock. It needs to be fully powered down to fix it.
748 */
749 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
750 bxt_dsi_pll_disable(encoder);
751 bxt_dsi_pll_enable(encoder, pipe_config);
752 } else {
753 vlv_dsi_pll_disable(encoder);
754 vlv_dsi_pll_enable(encoder, pipe_config);
755 }
756
757 if (IS_BROXTON(dev_priv)) {
758 /* Add MIPI IO reset programming for modeset */
759 intel_de_rmw(display, BXT_P_CR_GT_DISP_PWRON, 0, MIPIO_RST_CTRL);
760
761 /* Power up DSI regulator */
762 intel_de_write(display, BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
763 intel_de_write(display, BXT_P_DSI_REGULATOR_TX_CTRL, 0);
764 }
765
766 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
767 /* Disable DPOunit clock gating, can stall pipe */
768 intel_de_rmw(display, DSPCLK_GATE_D(dev_priv),
769 0, DPOUNIT_CLOCK_GATE_DISABLE);
770 }
771
772 if (!IS_GEMINILAKE(dev_priv))
773 intel_dsi_prepare(encoder, pipe_config);
774
775 /* Give the panel time to power-on and then deassert its reset */
776 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
777 msleep(intel_dsi->panel_on_delay);
778 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
779
780 if (IS_GEMINILAKE(dev_priv)) {
781 glk_cold_boot = glk_dsi_enable_io(encoder);
782
783 /* Prepare port in cold boot(s3/s4) scenario */
784 if (glk_cold_boot)
785 intel_dsi_prepare(encoder, pipe_config);
786 }
787
788 /* Put device in ready state (LP-11) */
789 intel_dsi_device_ready(encoder);
790
791 /* Prepare port in normal boot scenario */
792 if (IS_GEMINILAKE(dev_priv) && !glk_cold_boot)
793 intel_dsi_prepare(encoder, pipe_config);
794
795 /* Send initialization commands in LP mode */
796 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_INIT_OTP);
797
798 /*
799 * Enable port in pre-enable phase itself because as per hw team
800 * recommendation, port should be enabled before plane & pipe
801 */
802 if (is_cmd_mode(intel_dsi)) {
803 for_each_dsi_port(port, intel_dsi->ports)
804 intel_de_write(display,
805 MIPI_MAX_RETURN_PKT_SIZE(display, port), 8 * 4);
806 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_ON);
807 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
808 } else {
809 msleep(20); /* XXX */
810 for_each_dsi_port(port, intel_dsi->ports)
811 dpi_send_cmd(intel_dsi, TURN_ON, false, port);
812 msleep(100);
813
814 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
815
816 intel_dsi_port_enable(encoder, pipe_config);
817 }
818
819 intel_backlight_enable(pipe_config, conn_state);
820 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_ON);
821}
822
823static void bxt_dsi_enable(struct intel_atomic_state *state,
824 struct intel_encoder *encoder,
825 const struct intel_crtc_state *crtc_state,
826 const struct drm_connector_state *conn_state)
827{
828 intel_crtc_vblank_on(crtc_state);
829}
830
831/*
832 * DSI port disable has to be done after pipe and plane disable, so we do it in
833 * the post_disable hook.
834 */
835static void intel_dsi_disable(struct intel_atomic_state *state,
836 struct intel_encoder *encoder,
837 const struct intel_crtc_state *old_crtc_state,
838 const struct drm_connector_state *old_conn_state)
839{
840 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
841 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
842 enum port port;
843
844 drm_dbg_kms(&i915->drm, "\n");
845
846 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_OFF);
847 intel_backlight_disable(old_conn_state);
848
849 /*
850 * According to the spec we should send SHUTDOWN before
851 * MIPI_SEQ_DISPLAY_OFF only for v3+ VBTs, but field testing
852 * has shown that the v3 sequence works for v2 VBTs too
853 */
854 if (is_vid_mode(intel_dsi)) {
855 /* Send Shutdown command to the panel in LP mode */
856 for_each_dsi_port(port, intel_dsi->ports)
857 dpi_send_cmd(intel_dsi, SHUTDOWN, false, port);
858 msleep(10);
859 }
860}
861
862static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
863{
864 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
865
866 if (IS_GEMINILAKE(dev_priv))
867 glk_dsi_clear_device_ready(encoder);
868 else
869 vlv_dsi_clear_device_ready(encoder);
870}
871
872static void intel_dsi_post_disable(struct intel_atomic_state *state,
873 struct intel_encoder *encoder,
874 const struct intel_crtc_state *old_crtc_state,
875 const struct drm_connector_state *old_conn_state)
876{
877 struct intel_display *display = to_intel_display(encoder);
878 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
879 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
880 enum port port;
881
882 drm_dbg_kms(display->drm, "\n");
883
884 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
885 intel_crtc_vblank_off(old_crtc_state);
886
887 skl_scaler_disable(old_crtc_state);
888 }
889
890 if (is_vid_mode(intel_dsi)) {
891 for_each_dsi_port(port, intel_dsi->ports)
892 vlv_dsi_wait_for_fifo_empty(intel_dsi, port);
893
894 intel_dsi_port_disable(encoder);
895 usleep_range(2000, 5000);
896 }
897
898 intel_dsi_unprepare(encoder);
899
900 /*
901 * if disable packets are sent before sending shutdown packet then in
902 * some next enable sequence send turn on packet error is observed
903 */
904 if (is_cmd_mode(intel_dsi))
905 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_OFF);
906 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_OFF);
907
908 /* Transition to LP-00 */
909 intel_dsi_clear_device_ready(encoder);
910
911 if (IS_BROXTON(dev_priv)) {
912 /* Power down DSI regulator to save power */
913 intel_de_write(display, BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
914 intel_de_write(display, BXT_P_DSI_REGULATOR_TX_CTRL,
915 HS_IO_CTRL_SELECT);
916
917 /* Add MIPI IO reset programming for modeset */
918 intel_de_rmw(display, BXT_P_CR_GT_DISP_PWRON, MIPIO_RST_CTRL, 0);
919 }
920
921 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
922 bxt_dsi_pll_disable(encoder);
923 } else {
924 vlv_dsi_pll_disable(encoder);
925
926 intel_de_rmw(display, DSPCLK_GATE_D(dev_priv),
927 DPOUNIT_CLOCK_GATE_DISABLE, 0);
928 }
929
930 /* Assert reset */
931 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);
932
933 msleep(intel_dsi->panel_off_delay);
934 intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
935
936 intel_dsi->panel_power_off_time = ktime_get_boottime();
937}
938
939static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
940 enum pipe *pipe)
941{
942 struct intel_display *display = to_intel_display(encoder);
943 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
944 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
945 intel_wakeref_t wakeref;
946 enum port port;
947 bool active = false;
948
949 drm_dbg_kms(display->drm, "\n");
950
951 wakeref = intel_display_power_get_if_enabled(dev_priv,
952 encoder->power_domain);
953 if (!wakeref)
954 return false;
955
956 /*
957 * On Broxton the PLL needs to be enabled with a valid divider
958 * configuration, otherwise accessing DSI registers will hang the
959 * machine. See BSpec North Display Engine registers/MIPI[BXT].
960 */
961 if ((IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) &&
962 !bxt_dsi_pll_is_enabled(dev_priv))
963 goto out_put_power;
964
965 /* XXX: this only works for one DSI output */
966 for_each_dsi_port(port, intel_dsi->ports) {
967 i915_reg_t port_ctrl = port_ctrl_reg(dev_priv, port);
968 bool enabled = intel_de_read(display, port_ctrl) & DPI_ENABLE;
969
970 /*
971 * Due to some hardware limitations on VLV/CHV, the DPI enable
972 * bit in port C control register does not get set. As a
973 * workaround, check pipe B conf instead.
974 */
975 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
976 port == PORT_C)
977 enabled = intel_de_read(display,
978 TRANSCONF(dev_priv, PIPE_B)) & TRANSCONF_ENABLE;
979
980 /* Try command mode if video mode not enabled */
981 if (!enabled) {
982 u32 tmp = intel_de_read(display,
983 MIPI_DSI_FUNC_PRG(display, port));
984 enabled = tmp & CMD_MODE_DATA_WIDTH_MASK;
985 }
986
987 if (!enabled)
988 continue;
989
990 if (!(intel_de_read(display, MIPI_DEVICE_READY(display, port)) & DEVICE_READY))
991 continue;
992
993 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
994 u32 tmp = intel_de_read(display, MIPI_CTRL(display, port));
995 tmp &= BXT_PIPE_SELECT_MASK;
996 tmp >>= BXT_PIPE_SELECT_SHIFT;
997
998 if (drm_WARN_ON(display->drm, tmp > PIPE_C))
999 continue;
1000
1001 *pipe = tmp;
1002 } else {
1003 *pipe = port == PORT_A ? PIPE_A : PIPE_B;
1004 }
1005
1006 active = true;
1007 break;
1008 }
1009
1010out_put_power:
1011 intel_display_power_put(dev_priv, encoder->power_domain, wakeref);
1012
1013 return active;
1014}
1015
1016static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder,
1017 struct intel_crtc_state *pipe_config)
1018{
1019 struct intel_display *display = to_intel_display(encoder);
1020 struct drm_display_mode *adjusted_mode =
1021 &pipe_config->hw.adjusted_mode;
1022 struct drm_display_mode *adjusted_mode_sw;
1023 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
1024 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1025 unsigned int lane_count = intel_dsi->lane_count;
1026 unsigned int bpp, fmt;
1027 enum port port;
1028 u16 hactive, hfp, hsync, hbp, vfp, vsync;
1029 u16 hfp_sw, hsync_sw, hbp_sw;
1030 u16 crtc_htotal_sw, crtc_hsync_start_sw, crtc_hsync_end_sw,
1031 crtc_hblank_start_sw, crtc_hblank_end_sw;
1032
1033 /* FIXME: hw readout should not depend on SW state */
1034 adjusted_mode_sw = &crtc->config->hw.adjusted_mode;
1035
1036 /*
1037 * Atleast one port is active as encoder->get_config called only if
1038 * encoder->get_hw_state() returns true.
1039 */
1040 for_each_dsi_port(port, intel_dsi->ports) {
1041 if (intel_de_read(display, BXT_MIPI_PORT_CTRL(port)) & DPI_ENABLE)
1042 break;
1043 }
1044
1045 fmt = intel_de_read(display, MIPI_DSI_FUNC_PRG(display, port)) & VID_MODE_FORMAT_MASK;
1046 bpp = mipi_dsi_pixel_format_to_bpp(
1047 pixel_format_from_register_bits(fmt));
1048
1049 pipe_config->pipe_bpp = bdw_get_pipe_misc_bpp(crtc);
1050
1051 /* Enable Frame time stamo based scanline reporting */
1052 pipe_config->mode_flags |=
1053 I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
1054
1055 /* In terms of pixels */
1056 adjusted_mode->crtc_hdisplay =
1057 intel_de_read(display,
1058 BXT_MIPI_TRANS_HACTIVE(port));
1059 adjusted_mode->crtc_vdisplay =
1060 intel_de_read(display,
1061 BXT_MIPI_TRANS_VACTIVE(port));
1062 adjusted_mode->crtc_vtotal =
1063 intel_de_read(display,
1064 BXT_MIPI_TRANS_VTOTAL(port));
1065
1066 hactive = adjusted_mode->crtc_hdisplay;
1067 hfp = intel_de_read(display, MIPI_HFP_COUNT(display, port));
1068
1069 /*
1070 * Meaningful for video mode non-burst sync pulse mode only,
1071 * can be zero for non-burst sync events and burst modes
1072 */
1073 hsync = intel_de_read(display, MIPI_HSYNC_PADDING_COUNT(display, port));
1074 hbp = intel_de_read(display, MIPI_HBP_COUNT(display, port));
1075
1076 /* horizontal values are in terms of high speed byte clock */
1077 hfp = pixels_from_txbyteclkhs(hfp, bpp, lane_count,
1078 intel_dsi->burst_mode_ratio);
1079 hsync = pixels_from_txbyteclkhs(hsync, bpp, lane_count,
1080 intel_dsi->burst_mode_ratio);
1081 hbp = pixels_from_txbyteclkhs(hbp, bpp, lane_count,
1082 intel_dsi->burst_mode_ratio);
1083
1084 if (intel_dsi->dual_link) {
1085 hfp *= 2;
1086 hsync *= 2;
1087 hbp *= 2;
1088 }
1089
1090 /* vertical values are in terms of lines */
1091 vfp = intel_de_read(display, MIPI_VFP_COUNT(display, port));
1092 vsync = intel_de_read(display, MIPI_VSYNC_PADDING_COUNT(display, port));
1093
1094 adjusted_mode->crtc_htotal = hactive + hfp + hsync + hbp;
1095 adjusted_mode->crtc_hsync_start = hfp + adjusted_mode->crtc_hdisplay;
1096 adjusted_mode->crtc_hsync_end = hsync + adjusted_mode->crtc_hsync_start;
1097 adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hdisplay;
1098 adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal;
1099
1100 adjusted_mode->crtc_vsync_start = vfp + adjusted_mode->crtc_vdisplay;
1101 adjusted_mode->crtc_vsync_end = vsync + adjusted_mode->crtc_vsync_start;
1102 adjusted_mode->crtc_vblank_start = adjusted_mode->crtc_vdisplay;
1103 adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
1104
1105 /*
1106 * In BXT DSI there is no regs programmed with few horizontal timings
1107 * in Pixels but txbyteclkhs.. So retrieval process adds some
1108 * ROUND_UP ERRORS in the process of PIXELS<==>txbyteclkhs.
1109 * Actually here for the given adjusted_mode, we are calculating the
1110 * value programmed to the port and then back to the horizontal timing
1111 * param in pixels. This is the expected value, including roundup errors
1112 * And if that is same as retrieved value from port, then
1113 * (HW state) adjusted_mode's horizontal timings are corrected to
1114 * match with SW state to nullify the errors.
1115 */
1116 /* Calculating the value programmed to the Port register */
1117 hfp_sw = adjusted_mode_sw->crtc_hsync_start -
1118 adjusted_mode_sw->crtc_hdisplay;
1119 hsync_sw = adjusted_mode_sw->crtc_hsync_end -
1120 adjusted_mode_sw->crtc_hsync_start;
1121 hbp_sw = adjusted_mode_sw->crtc_htotal -
1122 adjusted_mode_sw->crtc_hsync_end;
1123
1124 if (intel_dsi->dual_link) {
1125 hfp_sw /= 2;
1126 hsync_sw /= 2;
1127 hbp_sw /= 2;
1128 }
1129
1130 hfp_sw = txbyteclkhs(hfp_sw, bpp, lane_count,
1131 intel_dsi->burst_mode_ratio);
1132 hsync_sw = txbyteclkhs(hsync_sw, bpp, lane_count,
1133 intel_dsi->burst_mode_ratio);
1134 hbp_sw = txbyteclkhs(hbp_sw, bpp, lane_count,
1135 intel_dsi->burst_mode_ratio);
1136
1137 /* Reverse calculating the adjusted mode parameters from port reg vals*/
1138 hfp_sw = pixels_from_txbyteclkhs(hfp_sw, bpp, lane_count,
1139 intel_dsi->burst_mode_ratio);
1140 hsync_sw = pixels_from_txbyteclkhs(hsync_sw, bpp, lane_count,
1141 intel_dsi->burst_mode_ratio);
1142 hbp_sw = pixels_from_txbyteclkhs(hbp_sw, bpp, lane_count,
1143 intel_dsi->burst_mode_ratio);
1144
1145 if (intel_dsi->dual_link) {
1146 hfp_sw *= 2;
1147 hsync_sw *= 2;
1148 hbp_sw *= 2;
1149 }
1150
1151 crtc_htotal_sw = adjusted_mode_sw->crtc_hdisplay + hfp_sw +
1152 hsync_sw + hbp_sw;
1153 crtc_hsync_start_sw = hfp_sw + adjusted_mode_sw->crtc_hdisplay;
1154 crtc_hsync_end_sw = hsync_sw + crtc_hsync_start_sw;
1155 crtc_hblank_start_sw = adjusted_mode_sw->crtc_hdisplay;
1156 crtc_hblank_end_sw = crtc_htotal_sw;
1157
1158 if (adjusted_mode->crtc_htotal == crtc_htotal_sw)
1159 adjusted_mode->crtc_htotal = adjusted_mode_sw->crtc_htotal;
1160
1161 if (adjusted_mode->crtc_hsync_start == crtc_hsync_start_sw)
1162 adjusted_mode->crtc_hsync_start =
1163 adjusted_mode_sw->crtc_hsync_start;
1164
1165 if (adjusted_mode->crtc_hsync_end == crtc_hsync_end_sw)
1166 adjusted_mode->crtc_hsync_end =
1167 adjusted_mode_sw->crtc_hsync_end;
1168
1169 if (adjusted_mode->crtc_hblank_start == crtc_hblank_start_sw)
1170 adjusted_mode->crtc_hblank_start =
1171 adjusted_mode_sw->crtc_hblank_start;
1172
1173 if (adjusted_mode->crtc_hblank_end == crtc_hblank_end_sw)
1174 adjusted_mode->crtc_hblank_end =
1175 adjusted_mode_sw->crtc_hblank_end;
1176}
1177
1178static void intel_dsi_get_config(struct intel_encoder *encoder,
1179 struct intel_crtc_state *pipe_config)
1180{
1181 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1182 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1183 u32 pclk;
1184
1185 drm_dbg_kms(&dev_priv->drm, "\n");
1186
1187 pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
1188
1189 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
1190 bxt_dsi_get_pipe_config(encoder, pipe_config);
1191 pclk = bxt_dsi_get_pclk(encoder, pipe_config);
1192 } else {
1193 pclk = vlv_dsi_get_pclk(encoder, pipe_config);
1194 }
1195
1196 pipe_config->port_clock = pclk;
1197
1198 /* FIXME definitely not right for burst/cmd mode/pixel overlap */
1199 pipe_config->hw.adjusted_mode.crtc_clock = pclk;
1200 if (intel_dsi->dual_link)
1201 pipe_config->hw.adjusted_mode.crtc_clock *= 2;
1202}
1203
1204/* return txclkesc cycles in terms of divider and duration in us */
1205static u16 txclkesc(u32 divider, unsigned int us)
1206{
1207 switch (divider) {
1208 case ESCAPE_CLOCK_DIVIDER_1:
1209 default:
1210 return 20 * us;
1211 case ESCAPE_CLOCK_DIVIDER_2:
1212 return 10 * us;
1213 case ESCAPE_CLOCK_DIVIDER_4:
1214 return 5 * us;
1215 }
1216}
1217
1218static void set_dsi_timings(struct intel_encoder *encoder,
1219 const struct drm_display_mode *adjusted_mode)
1220{
1221 struct intel_display *display = to_intel_display(encoder);
1222 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1223 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1224 enum port port;
1225 unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
1226 unsigned int lane_count = intel_dsi->lane_count;
1227
1228 u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
1229
1230 hactive = adjusted_mode->crtc_hdisplay;
1231 hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay;
1232 hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
1233 hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end;
1234
1235 if (intel_dsi->dual_link) {
1236 hactive /= 2;
1237 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
1238 hactive += intel_dsi->pixel_overlap;
1239 hfp /= 2;
1240 hsync /= 2;
1241 hbp /= 2;
1242 }
1243
1244 vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay;
1245 vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
1246 vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end;
1247
1248 /* horizontal values are in terms of high speed byte clock */
1249 hactive = txbyteclkhs(hactive, bpp, lane_count,
1250 intel_dsi->burst_mode_ratio);
1251 hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio);
1252 hsync = txbyteclkhs(hsync, bpp, lane_count,
1253 intel_dsi->burst_mode_ratio);
1254 hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio);
1255
1256 for_each_dsi_port(port, intel_dsi->ports) {
1257 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
1258 /*
1259 * Program hdisplay and vdisplay on MIPI transcoder.
1260 * This is different from calculated hactive and
1261 * vactive, as they are calculated per channel basis,
1262 * whereas these values should be based on resolution.
1263 */
1264 intel_de_write(display, BXT_MIPI_TRANS_HACTIVE(port),
1265 adjusted_mode->crtc_hdisplay);
1266 intel_de_write(display, BXT_MIPI_TRANS_VACTIVE(port),
1267 adjusted_mode->crtc_vdisplay);
1268 intel_de_write(display, BXT_MIPI_TRANS_VTOTAL(port),
1269 adjusted_mode->crtc_vtotal);
1270 }
1271
1272 intel_de_write(display, MIPI_HACTIVE_AREA_COUNT(display, port),
1273 hactive);
1274 intel_de_write(display, MIPI_HFP_COUNT(display, port), hfp);
1275
1276 /* meaningful for video mode non-burst sync pulse mode only,
1277 * can be zero for non-burst sync events and burst modes */
1278 intel_de_write(display, MIPI_HSYNC_PADDING_COUNT(display, port),
1279 hsync);
1280 intel_de_write(display, MIPI_HBP_COUNT(display, port), hbp);
1281
1282 /* vertical values are in terms of lines */
1283 intel_de_write(display, MIPI_VFP_COUNT(display, port), vfp);
1284 intel_de_write(display, MIPI_VSYNC_PADDING_COUNT(display, port),
1285 vsync);
1286 intel_de_write(display, MIPI_VBP_COUNT(display, port), vbp);
1287 }
1288}
1289
1290static u32 pixel_format_to_reg(enum mipi_dsi_pixel_format fmt)
1291{
1292 switch (fmt) {
1293 case MIPI_DSI_FMT_RGB888:
1294 return VID_MODE_FORMAT_RGB888;
1295 case MIPI_DSI_FMT_RGB666:
1296 return VID_MODE_FORMAT_RGB666;
1297 case MIPI_DSI_FMT_RGB666_PACKED:
1298 return VID_MODE_FORMAT_RGB666_PACKED;
1299 case MIPI_DSI_FMT_RGB565:
1300 return VID_MODE_FORMAT_RGB565;
1301 default:
1302 MISSING_CASE(fmt);
1303 return VID_MODE_FORMAT_RGB666;
1304 }
1305}
1306
1307static void intel_dsi_prepare(struct intel_encoder *encoder,
1308 const struct intel_crtc_state *pipe_config)
1309{
1310 struct intel_display *display = to_intel_display(encoder);
1311 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1312 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
1313 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1314 const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
1315 enum port port;
1316 unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
1317 u32 val, tmp;
1318 u16 mode_hdisplay;
1319
1320 drm_dbg_kms(display->drm, "pipe %c\n", pipe_name(crtc->pipe));
1321
1322 mode_hdisplay = adjusted_mode->crtc_hdisplay;
1323
1324 if (intel_dsi->dual_link) {
1325 mode_hdisplay /= 2;
1326 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
1327 mode_hdisplay += intel_dsi->pixel_overlap;
1328 }
1329
1330 for_each_dsi_port(port, intel_dsi->ports) {
1331 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1332 /*
1333 * escape clock divider, 20MHz, shared for A and C.
1334 * device ready must be off when doing this! txclkesc?
1335 */
1336 tmp = intel_de_read(display, MIPI_CTRL(display, PORT_A));
1337 tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
1338 intel_de_write(display, MIPI_CTRL(display, PORT_A),
1339 tmp | ESCAPE_CLOCK_DIVIDER_1);
1340
1341 /* read request priority is per pipe */
1342 tmp = intel_de_read(display, MIPI_CTRL(display, port));
1343 tmp &= ~READ_REQUEST_PRIORITY_MASK;
1344 intel_de_write(display, MIPI_CTRL(display, port),
1345 tmp | READ_REQUEST_PRIORITY_HIGH);
1346 } else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
1347 enum pipe pipe = crtc->pipe;
1348
1349 intel_de_rmw(display, MIPI_CTRL(display, port),
1350 BXT_PIPE_SELECT_MASK, BXT_PIPE_SELECT(pipe));
1351 }
1352
1353 /* XXX: why here, why like this? handling in irq handler?! */
1354 intel_de_write(display, MIPI_INTR_STAT(display, port), 0xffffffff);
1355 intel_de_write(display, MIPI_INTR_EN(display, port), 0xffffffff);
1356
1357 intel_de_write(display, MIPI_DPHY_PARAM(display, port),
1358 intel_dsi->dphy_reg);
1359
1360 intel_de_write(display, MIPI_DPI_RESOLUTION(display, port),
1361 adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT | mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT);
1362 }
1363
1364 set_dsi_timings(encoder, adjusted_mode);
1365
1366 val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
1367 if (is_cmd_mode(intel_dsi)) {
1368 val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
1369 val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
1370 } else {
1371 val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
1372 val |= pixel_format_to_reg(intel_dsi->pixel_format);
1373 }
1374
1375 tmp = 0;
1376 if (intel_dsi->eotp_pkt == 0)
1377 tmp |= EOT_DISABLE;
1378 if (intel_dsi->clock_stop)
1379 tmp |= CLOCKSTOP;
1380
1381 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
1382 tmp |= BXT_DPHY_DEFEATURE_EN;
1383 if (!is_cmd_mode(intel_dsi))
1384 tmp |= BXT_DEFEATURE_DPI_FIFO_CTR;
1385 }
1386
1387 for_each_dsi_port(port, intel_dsi->ports) {
1388 intel_de_write(display, MIPI_DSI_FUNC_PRG(display, port), val);
1389
1390 /* timeouts for recovery. one frame IIUC. if counter expires,
1391 * EOT and stop state. */
1392
1393 /*
1394 * In burst mode, value greater than one DPI line Time in byte
1395 * clock (txbyteclkhs) To timeout this timer 1+ of the above
1396 * said value is recommended.
1397 *
1398 * In non-burst mode, Value greater than one DPI frame time in
1399 * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
1400 * said value is recommended.
1401 *
1402 * In DBI only mode, value greater than one DBI frame time in
1403 * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
1404 * said value is recommended.
1405 */
1406
1407 if (is_vid_mode(intel_dsi) &&
1408 intel_dsi->video_mode == BURST_MODE) {
1409 intel_de_write(display, MIPI_HS_TX_TIMEOUT(display, port),
1410 txbyteclkhs(adjusted_mode->crtc_htotal, bpp, intel_dsi->lane_count, intel_dsi->burst_mode_ratio) + 1);
1411 } else {
1412 intel_de_write(display, MIPI_HS_TX_TIMEOUT(display, port),
1413 txbyteclkhs(adjusted_mode->crtc_vtotal * adjusted_mode->crtc_htotal, bpp, intel_dsi->lane_count, intel_dsi->burst_mode_ratio) + 1);
1414 }
1415 intel_de_write(display, MIPI_LP_RX_TIMEOUT(display, port),
1416 intel_dsi->lp_rx_timeout);
1417 intel_de_write(display, MIPI_TURN_AROUND_TIMEOUT(display, port),
1418 intel_dsi->turn_arnd_val);
1419 intel_de_write(display, MIPI_DEVICE_RESET_TIMER(display, port),
1420 intel_dsi->rst_timer_val);
1421
1422 /* dphy stuff */
1423
1424 /* in terms of low power clock */
1425 intel_de_write(display, MIPI_INIT_COUNT(display, port),
1426 txclkesc(intel_dsi->escape_clk_div, 100));
1427
1428 if ((IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) &&
1429 !intel_dsi->dual_link) {
1430 /*
1431 * BXT spec says write MIPI_INIT_COUNT for
1432 * both the ports, even if only one is
1433 * getting used. So write the other port
1434 * if not in dual link mode.
1435 */
1436 intel_de_write(display,
1437 MIPI_INIT_COUNT(display, port == PORT_A ? PORT_C : PORT_A),
1438 intel_dsi->init_count);
1439 }
1440
1441 /* recovery disables */
1442 intel_de_write(display, MIPI_EOT_DISABLE(display, port), tmp);
1443
1444 /* in terms of low power clock */
1445 intel_de_write(display, MIPI_INIT_COUNT(display, port),
1446 intel_dsi->init_count);
1447
1448 /* in terms of txbyteclkhs. actual high to low switch +
1449 * MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK.
1450 *
1451 * XXX: write MIPI_STOP_STATE_STALL?
1452 */
1453 intel_de_write(display, MIPI_HIGH_LOW_SWITCH_COUNT(display, port),
1454 intel_dsi->hs_to_lp_count);
1455
1456 /* XXX: low power clock equivalence in terms of byte clock.
1457 * the number of byte clocks occupied in one low power clock.
1458 * based on txbyteclkhs and txclkesc.
1459 * txclkesc time / txbyteclk time * (105 + MIPI_STOP_STATE_STALL
1460 * ) / 105.???
1461 */
1462 intel_de_write(display, MIPI_LP_BYTECLK(display, port),
1463 intel_dsi->lp_byte_clk);
1464
1465 if (IS_GEMINILAKE(dev_priv)) {
1466 intel_de_write(display, MIPI_TLPX_TIME_COUNT(display, port),
1467 intel_dsi->lp_byte_clk);
1468 /* Shadow of DPHY reg */
1469 intel_de_write(display, MIPI_CLK_LANE_TIMING(display, port),
1470 intel_dsi->dphy_reg);
1471 }
1472
1473 /* the bw essential for transmitting 16 long packets containing
1474 * 252 bytes meant for dcs write memory command is programmed in
1475 * this register in terms of byte clocks. based on dsi transfer
1476 * rate and the number of lanes configured the time taken to
1477 * transmit 16 long packets in a dsi stream varies. */
1478 intel_de_write(display, MIPI_DBI_BW_CTRL(display, port),
1479 intel_dsi->bw_timer);
1480
1481 intel_de_write(display, MIPI_CLK_LANE_SWITCH_TIME_CNT(display, port),
1482 intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT | intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT);
1483
1484 if (is_vid_mode(intel_dsi)) {
1485 u32 fmt = intel_dsi->video_frmt_cfg_bits | IP_TG_CONFIG;
1486
1487 /*
1488 * Some panels might have resolution which is not a
1489 * multiple of 64 like 1366 x 768. Enable RANDOM
1490 * resolution support for such panels by default.
1491 */
1492 fmt |= RANDOM_DPI_DISPLAY_RESOLUTION;
1493
1494 switch (intel_dsi->video_mode) {
1495 default:
1496 MISSING_CASE(intel_dsi->video_mode);
1497 fallthrough;
1498 case NON_BURST_SYNC_EVENTS:
1499 fmt |= VIDEO_MODE_NON_BURST_WITH_SYNC_EVENTS;
1500 break;
1501 case NON_BURST_SYNC_PULSE:
1502 fmt |= VIDEO_MODE_NON_BURST_WITH_SYNC_PULSE;
1503 break;
1504 case BURST_MODE:
1505 fmt |= VIDEO_MODE_BURST;
1506 break;
1507 }
1508
1509 intel_de_write(display, MIPI_VIDEO_MODE_FORMAT(display, port), fmt);
1510 }
1511 }
1512}
1513
1514static void intel_dsi_unprepare(struct intel_encoder *encoder)
1515{
1516 struct intel_display *display = to_intel_display(encoder);
1517 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1518 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1519 enum port port;
1520
1521 if (IS_GEMINILAKE(dev_priv))
1522 return;
1523
1524 for_each_dsi_port(port, intel_dsi->ports) {
1525 /* Panel commands can be sent when clock is in LP11 */
1526 intel_de_write(display, MIPI_DEVICE_READY(display, port), 0x0);
1527
1528 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
1529 bxt_dsi_reset_clocks(encoder, port);
1530 else
1531 vlv_dsi_reset_clocks(encoder, port);
1532 intel_de_write(display, MIPI_EOT_DISABLE(display, port), CLOCKSTOP);
1533
1534 intel_de_rmw(display, MIPI_DSI_FUNC_PRG(display, port), VID_MODE_FORMAT_MASK, 0);
1535
1536 intel_de_write(display, MIPI_DEVICE_READY(display, port), 0x1);
1537 }
1538}
1539
1540static const struct drm_encoder_funcs intel_dsi_funcs = {
1541 .destroy = intel_encoder_destroy,
1542};
1543
1544static enum drm_mode_status vlv_dsi_mode_valid(struct drm_connector *connector,
1545 struct drm_display_mode *mode)
1546{
1547 struct drm_i915_private *i915 = to_i915(connector->dev);
1548
1549 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
1550 enum drm_mode_status status;
1551
1552 status = intel_cpu_transcoder_mode_valid(i915, mode);
1553 if (status != MODE_OK)
1554 return status;
1555 }
1556
1557 return intel_dsi_mode_valid(connector, mode);
1558}
1559
1560static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = {
1561 .get_modes = intel_dsi_get_modes,
1562 .mode_valid = vlv_dsi_mode_valid,
1563 .atomic_check = intel_digital_connector_atomic_check,
1564};
1565
1566static const struct drm_connector_funcs intel_dsi_connector_funcs = {
1567 .detect = intel_panel_detect,
1568 .late_register = intel_connector_register,
1569 .early_unregister = intel_connector_unregister,
1570 .destroy = intel_connector_destroy,
1571 .fill_modes = drm_helper_probe_single_connector_modes,
1572 .atomic_get_property = intel_digital_connector_atomic_get_property,
1573 .atomic_set_property = intel_digital_connector_atomic_set_property,
1574 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1575 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
1576};
1577
1578static void vlv_dsi_add_properties(struct intel_connector *connector)
1579{
1580 const struct drm_display_mode *fixed_mode =
1581 intel_panel_preferred_fixed_mode(connector);
1582
1583 intel_attach_scaling_mode_property(&connector->base);
1584
1585 drm_connector_set_panel_orientation_with_quirk(&connector->base,
1586 intel_dsi_get_panel_orientation(connector),
1587 fixed_mode->hdisplay,
1588 fixed_mode->vdisplay);
1589}
1590
1591#define NS_KHZ_RATIO 1000000
1592
1593#define PREPARE_CNT_MAX 0x3F
1594#define EXIT_ZERO_CNT_MAX 0x3F
1595#define CLK_ZERO_CNT_MAX 0xFF
1596#define TRAIL_CNT_MAX 0x1F
1597
1598static void vlv_dphy_param_init(struct intel_dsi *intel_dsi)
1599{
1600 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
1601 struct intel_connector *connector = intel_dsi->attached_connector;
1602 struct mipi_config *mipi_config = connector->panel.vbt.dsi.config;
1603 u32 tlpx_ns, extra_byte_count, tlpx_ui;
1604 u32 ui_num, ui_den;
1605 u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
1606 u32 ths_prepare_ns, tclk_trail_ns;
1607 u32 tclk_prepare_clkzero, ths_prepare_hszero;
1608 u32 lp_to_hs_switch, hs_to_lp_switch;
1609 u32 mul;
1610
1611 tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
1612
1613 switch (intel_dsi->lane_count) {
1614 case 1:
1615 case 2:
1616 extra_byte_count = 2;
1617 break;
1618 case 3:
1619 extra_byte_count = 4;
1620 break;
1621 case 4:
1622 default:
1623 extra_byte_count = 3;
1624 break;
1625 }
1626
1627 /* in Kbps */
1628 ui_num = NS_KHZ_RATIO;
1629 ui_den = intel_dsi_bitrate(intel_dsi);
1630
1631 tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
1632 ths_prepare_hszero = mipi_config->ths_prepare_hszero;
1633
1634 /*
1635 * B060
1636 * LP byte clock = TLPX/ (8UI)
1637 */
1638 intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
1639
1640 /* DDR clock period = 2 * UI
1641 * UI(sec) = 1/(bitrate * 10^3) (bitrate is in KHZ)
1642 * UI(nsec) = 10^6 / bitrate
1643 * DDR clock period (nsec) = 2 * UI = (2 * 10^6)/ bitrate
1644 * DDR clock count = ns_value / DDR clock period
1645 *
1646 * For GEMINILAKE dphy_param_reg will be programmed in terms of
1647 * HS byte clock count for other platform in HS ddr clock count
1648 */
1649 mul = IS_GEMINILAKE(dev_priv) ? 8 : 2;
1650 ths_prepare_ns = max(mipi_config->ths_prepare,
1651 mipi_config->tclk_prepare);
1652
1653 /* prepare count */
1654 prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * mul);
1655
1656 if (prepare_cnt > PREPARE_CNT_MAX) {
1657 drm_dbg_kms(&dev_priv->drm, "prepare count too high %u\n",
1658 prepare_cnt);
1659 prepare_cnt = PREPARE_CNT_MAX;
1660 }
1661
1662 /* exit zero count */
1663 exit_zero_cnt = DIV_ROUND_UP(
1664 (ths_prepare_hszero - ths_prepare_ns) * ui_den,
1665 ui_num * mul
1666 );
1667
1668 /*
1669 * Exit zero is unified val ths_zero and ths_exit
1670 * minimum value for ths_exit = 110ns
1671 * min (exit_zero_cnt * 2) = 110/UI
1672 * exit_zero_cnt = 55/UI
1673 */
1674 if (exit_zero_cnt < (55 * ui_den / ui_num) && (55 * ui_den) % ui_num)
1675 exit_zero_cnt += 1;
1676
1677 if (exit_zero_cnt > EXIT_ZERO_CNT_MAX) {
1678 drm_dbg_kms(&dev_priv->drm, "exit zero count too high %u\n",
1679 exit_zero_cnt);
1680 exit_zero_cnt = EXIT_ZERO_CNT_MAX;
1681 }
1682
1683 /* clk zero count */
1684 clk_zero_cnt = DIV_ROUND_UP(
1685 (tclk_prepare_clkzero - ths_prepare_ns)
1686 * ui_den, ui_num * mul);
1687
1688 if (clk_zero_cnt > CLK_ZERO_CNT_MAX) {
1689 drm_dbg_kms(&dev_priv->drm, "clock zero count too high %u\n",
1690 clk_zero_cnt);
1691 clk_zero_cnt = CLK_ZERO_CNT_MAX;
1692 }
1693
1694 /* trail count */
1695 tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
1696 trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, ui_num * mul);
1697
1698 if (trail_cnt > TRAIL_CNT_MAX) {
1699 drm_dbg_kms(&dev_priv->drm, "trail count too high %u\n",
1700 trail_cnt);
1701 trail_cnt = TRAIL_CNT_MAX;
1702 }
1703
1704 /* B080 */
1705 intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
1706 clk_zero_cnt << 8 | prepare_cnt;
1707
1708 /*
1709 * LP to HS switch count = 4TLPX + PREP_COUNT * mul + EXIT_ZERO_COUNT *
1710 * mul + 10UI + Extra Byte Count
1711 *
1712 * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
1713 * Extra Byte Count is calculated according to number of lanes.
1714 * High Low Switch Count is the Max of LP to HS and
1715 * HS to LP switch count
1716 *
1717 */
1718 tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
1719
1720 /* B044 */
1721 /* FIXME:
1722 * The comment above does not match with the code */
1723 lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * mul +
1724 exit_zero_cnt * mul + 10, 8);
1725
1726 hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
1727
1728 intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
1729 intel_dsi->hs_to_lp_count += extra_byte_count;
1730
1731 /* B088 */
1732 /* LP -> HS for clock lanes
1733 * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
1734 * extra byte count
1735 * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
1736 * 2(in UI) + extra byte count
1737 * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
1738 * 8 + extra byte count
1739 */
1740 intel_dsi->clk_lp_to_hs_count =
1741 DIV_ROUND_UP(
1742 4 * tlpx_ui + prepare_cnt * 2 +
1743 clk_zero_cnt * 2,
1744 8);
1745
1746 intel_dsi->clk_lp_to_hs_count += extra_byte_count;
1747
1748 /* HS->LP for Clock Lanes
1749 * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
1750 * Extra byte count
1751 * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
1752 * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
1753 * Extra byte count
1754 */
1755 intel_dsi->clk_hs_to_lp_count =
1756 DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
1757 8);
1758 intel_dsi->clk_hs_to_lp_count += extra_byte_count;
1759
1760 intel_dsi_log_params(intel_dsi);
1761}
1762
1763typedef void (*vlv_dsi_dmi_quirk_func)(struct intel_dsi *intel_dsi);
1764
1765/*
1766 * Vtotal is wrong on the Asus TF103C leading to the last line of the display
1767 * being shown as the first line. The factory installed Android has a hardcoded
1768 * modeline, causing it to not suffer from this BIOS bug.
1769 *
1770 * Original mode: "1280x800": 60 67700 1280 1312 1328 1376 800 808 812 820 0x8 0xa
1771 * Fixed mode: "1280x800": 60 67700 1280 1312 1328 1376 800 808 812 816 0x8 0xa
1772 *
1773 * https://gitlab.freedesktop.org/drm/intel/-/issues/9381
1774 */
1775static void vlv_dsi_asus_tf103c_mode_fixup(struct intel_dsi *intel_dsi)
1776{
1777 /* Cast away the const as we want to fixup the mode */
1778 struct drm_display_mode *fixed_mode = (struct drm_display_mode *)
1779 intel_panel_preferred_fixed_mode(intel_dsi->attached_connector);
1780
1781 if (fixed_mode->vtotal == 820)
1782 fixed_mode->vtotal -= 4;
1783}
1784
1785/*
1786 * On the Lenovo Yoga Tablet 2 830 / 1050 there are 2 problems:
1787 * 1. The I2C MIPI sequence elements reference bus 3. ACPI has I2C1 - I2C7
1788 * which under Linux become bus 0 - 6. And the MIPI sequence reference
1789 * to bus 3 is indented for I2C3 which is bus 2 under Linux.
1790 *
1791 * Note mipi_exec_i2c() cannot just subtract 1 from the bus
1792 * given in the I2C MIPI sequence element. Since on other
1793 * devices the I2C bus-numbers used in the MIPI sequences do
1794 * actually start at 0.
1795 *
1796 * 2. width_/height_mm contain a bogus 192mm x 120mm size. This is
1797 * especially a problem on the 8" 830 version which uses a 10:16
1798 * portrait screen where as the bogus size is 16:10.
1799 *
1800 * https://gitlab.freedesktop.org/drm/intel/-/issues/9379
1801 */
1802static void vlv_dsi_lenovo_yoga_tab2_size_fixup(struct intel_dsi *intel_dsi)
1803{
1804 const struct drm_display_mode *fixed_mode =
1805 intel_panel_preferred_fixed_mode(intel_dsi->attached_connector);
1806 struct drm_display_info *info = &intel_dsi->attached_connector->base.display_info;
1807
1808 intel_dsi->i2c_bus_num = 2;
1809
1810 /*
1811 * The 10" 1050 uses a 1920x1200 landscape screen, where as the 8" 830
1812 * uses a 1200x1920 portrait screen.
1813 */
1814 if (fixed_mode->hdisplay == 1920) {
1815 info->width_mm = 216;
1816 info->height_mm = 135;
1817 } else {
1818 info->width_mm = 107;
1819 info->height_mm = 171;
1820 }
1821}
1822
1823/*
1824 * On the Lenovo Yoga Tab 3 Pro YT3-X90F there are 2 problems:
1825 * 1. i2c_acpi_find_adapter() picks the wrong adapter causing mipi_exec_i2c()
1826 * to not work. Fix this by setting i2c_bus_num.
1827 * 2. There is no backlight off MIPI sequence, causing the backlight to stay on.
1828 * Add a backlight off sequence mirroring the existing backlight on sequence.
1829 *
1830 * https://gitlab.freedesktop.org/drm/intel/-/issues/9380
1831 */
1832static void vlv_dsi_lenovo_yoga_tab3_backlight_fixup(struct intel_dsi *intel_dsi)
1833{
1834 static const u8 backlight_off_sequence[16] = {
1835 /* Header Seq-id 7, length after header 11 bytes */
1836 0x07, 0x0b, 0x00, 0x00, 0x00,
1837 /* MIPI_SEQ_ELEM_I2C bus 0 addr 0x2c reg 0x00 data-len 1 data 0x00 */
1838 0x04, 0x08, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x01, 0x00,
1839 /* MIPI_SEQ_ELEM_END */
1840 0x00
1841 };
1842 struct intel_connector *connector = intel_dsi->attached_connector;
1843
1844 intel_dsi->i2c_bus_num = 0;
1845 connector->panel.vbt.dsi.sequence[MIPI_SEQ_BACKLIGHT_OFF] = backlight_off_sequence;
1846}
1847
1848static const struct dmi_system_id vlv_dsi_dmi_quirk_table[] = {
1849 {
1850 /* Asus Transformer Pad TF103C */
1851 .matches = {
1852 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
1853 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
1854 },
1855 .driver_data = (void *)vlv_dsi_asus_tf103c_mode_fixup,
1856 },
1857 {
1858 /*
1859 * Lenovo Yoga Tablet 2 830F/L or 1050F/L (The 8" and 10"
1860 * Lenovo Yoga Tablet 2 use the same mainboard)
1861 */
1862 .matches = {
1863 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
1864 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
1865 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
1866 /* Partial match on beginning of BIOS version */
1867 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
1868 },
1869 .driver_data = (void *)vlv_dsi_lenovo_yoga_tab2_size_fixup,
1870 },
1871 {
1872 /* Lenovo Yoga Tab 3 Pro YT3-X90F */
1873 .matches = {
1874 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
1875 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
1876 },
1877 .driver_data = (void *)vlv_dsi_lenovo_yoga_tab3_backlight_fixup,
1878 },
1879 { }
1880};
1881
1882void vlv_dsi_init(struct drm_i915_private *dev_priv)
1883{
1884 struct intel_display *display = &dev_priv->display;
1885 struct intel_dsi *intel_dsi;
1886 struct intel_encoder *encoder;
1887 struct intel_connector *connector;
1888 struct drm_display_mode *current_mode;
1889 const struct dmi_system_id *dmi_id;
1890 enum port port;
1891 enum pipe pipe;
1892
1893 drm_dbg_kms(&dev_priv->drm, "\n");
1894
1895 /* There is no detection method for MIPI so rely on VBT */
1896 if (!intel_bios_is_dsi_present(display, &port))
1897 return;
1898
1899 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
1900 dev_priv->display.dsi.mmio_base = BXT_MIPI_BASE;
1901 else
1902 dev_priv->display.dsi.mmio_base = VLV_MIPI_BASE;
1903
1904 intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL);
1905 if (!intel_dsi)
1906 return;
1907
1908 connector = intel_connector_alloc();
1909 if (!connector) {
1910 kfree(intel_dsi);
1911 return;
1912 }
1913
1914 encoder = &intel_dsi->base;
1915 intel_dsi->attached_connector = connector;
1916
1917 drm_encoder_init(&dev_priv->drm, &encoder->base, &intel_dsi_funcs,
1918 DRM_MODE_ENCODER_DSI, "DSI %c", port_name(port));
1919
1920 encoder->compute_config = intel_dsi_compute_config;
1921 encoder->pre_enable = intel_dsi_pre_enable;
1922 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
1923 encoder->enable = bxt_dsi_enable;
1924 encoder->disable = intel_dsi_disable;
1925 encoder->post_disable = intel_dsi_post_disable;
1926 encoder->get_hw_state = intel_dsi_get_hw_state;
1927 encoder->get_config = intel_dsi_get_config;
1928 encoder->update_pipe = intel_backlight_update;
1929 encoder->shutdown = intel_dsi_shutdown;
1930
1931 connector->get_hw_state = intel_connector_get_hw_state;
1932
1933 encoder->port = port;
1934 encoder->type = INTEL_OUTPUT_DSI;
1935 encoder->power_domain = POWER_DOMAIN_PORT_DSI;
1936 encoder->cloneable = 0;
1937
1938 /*
1939 * On BYT/CHV, pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI
1940 * port C. BXT isn't limited like this.
1941 */
1942 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
1943 encoder->pipe_mask = ~0;
1944 else if (port == PORT_A)
1945 encoder->pipe_mask = BIT(PIPE_A);
1946 else
1947 encoder->pipe_mask = BIT(PIPE_B);
1948
1949 intel_dsi->panel_power_off_time = ktime_get_boottime();
1950
1951 intel_bios_init_panel_late(display, &connector->panel, NULL, NULL);
1952
1953 if (connector->panel.vbt.dsi.config->dual_link)
1954 intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
1955 else
1956 intel_dsi->ports = BIT(port);
1957
1958 if (drm_WARN_ON(&dev_priv->drm, connector->panel.vbt.dsi.bl_ports & ~intel_dsi->ports))
1959 connector->panel.vbt.dsi.bl_ports &= intel_dsi->ports;
1960
1961 if (drm_WARN_ON(&dev_priv->drm, connector->panel.vbt.dsi.cabc_ports & ~intel_dsi->ports))
1962 connector->panel.vbt.dsi.cabc_ports &= intel_dsi->ports;
1963
1964 /* Create a DSI host (and a device) for each port. */
1965 for_each_dsi_port(port, intel_dsi->ports) {
1966 struct intel_dsi_host *host;
1967
1968 host = intel_dsi_host_init(intel_dsi, &intel_dsi_host_ops,
1969 port);
1970 if (!host)
1971 goto err;
1972
1973 intel_dsi->dsi_hosts[port] = host;
1974 }
1975
1976 if (!intel_dsi_vbt_init(intel_dsi, MIPI_DSI_GENERIC_PANEL_ID)) {
1977 drm_dbg_kms(&dev_priv->drm, "no device found\n");
1978 goto err;
1979 }
1980
1981 /* Use clock read-back from current hw-state for fastboot */
1982 current_mode = intel_encoder_current_mode(encoder);
1983 if (current_mode) {
1984 drm_dbg_kms(&dev_priv->drm, "Calculated pclk %d GOP %d\n",
1985 intel_dsi->pclk, current_mode->clock);
1986 if (intel_fuzzy_clock_check(intel_dsi->pclk,
1987 current_mode->clock)) {
1988 drm_dbg_kms(&dev_priv->drm, "Using GOP pclk\n");
1989 intel_dsi->pclk = current_mode->clock;
1990 }
1991
1992 kfree(current_mode);
1993 }
1994
1995 vlv_dphy_param_init(intel_dsi);
1996
1997 intel_dsi_vbt_gpio_init(intel_dsi,
1998 intel_dsi_get_hw_state(encoder, &pipe));
1999
2000 drm_connector_init(&dev_priv->drm, &connector->base, &intel_dsi_connector_funcs,
2001 DRM_MODE_CONNECTOR_DSI);
2002
2003 drm_connector_helper_add(&connector->base, &intel_dsi_connector_helper_funcs);
2004
2005 connector->base.display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/
2006
2007 intel_connector_attach_encoder(connector, encoder);
2008
2009 mutex_lock(&dev_priv->drm.mode_config.mutex);
2010 intel_panel_add_vbt_lfp_fixed_mode(connector);
2011 mutex_unlock(&dev_priv->drm.mode_config.mutex);
2012
2013 if (!intel_panel_preferred_fixed_mode(connector)) {
2014 drm_dbg_kms(&dev_priv->drm, "no fixed mode\n");
2015 goto err_cleanup_connector;
2016 }
2017
2018 dmi_id = dmi_first_match(vlv_dsi_dmi_quirk_table);
2019 if (dmi_id) {
2020 vlv_dsi_dmi_quirk_func quirk_func =
2021 (vlv_dsi_dmi_quirk_func)dmi_id->driver_data;
2022
2023 quirk_func(intel_dsi);
2024 }
2025
2026 intel_panel_init(connector, NULL);
2027
2028 intel_backlight_setup(connector, INVALID_PIPE);
2029
2030 vlv_dsi_add_properties(connector);
2031
2032 return;
2033
2034err_cleanup_connector:
2035 drm_connector_cleanup(&connector->base);
2036err:
2037 drm_encoder_cleanup(&encoder->base);
2038 kfree(intel_dsi);
2039 kfree(connector);
2040}