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1// SPDX-License-Identifier: GPL-2.0
2//
3// Ingenic JZ47xx KMS driver
4//
5// Copyright (C) 2019, Paul Cercueil <paul@crapouillou.net>
6
7#include "ingenic-drm.h"
8
9#include <linux/bitfield.h>
10#include <linux/component.h>
11#include <linux/clk.h>
12#include <linux/dma-mapping.h>
13#include <linux/io.h>
14#include <linux/media-bus-format.h>
15#include <linux/module.h>
16#include <linux/mutex.h>
17#include <linux/of.h>
18#include <linux/of_reserved_mem.h>
19#include <linux/platform_device.h>
20#include <linux/pm.h>
21#include <linux/regmap.h>
22
23#include <drm/drm_atomic.h>
24#include <drm/drm_atomic_helper.h>
25#include <drm/drm_bridge.h>
26#include <drm/drm_bridge_connector.h>
27#include <drm/drm_color_mgmt.h>
28#include <drm/drm_crtc.h>
29#include <drm/drm_damage_helper.h>
30#include <drm/drm_drv.h>
31#include <drm/drm_encoder.h>
32#include <drm/drm_gem_dma_helper.h>
33#include <drm/drm_fb_dma_helper.h>
34#include <drm/drm_fbdev_generic.h>
35#include <drm/drm_fourcc.h>
36#include <drm/drm_framebuffer.h>
37#include <drm/drm_gem_atomic_helper.h>
38#include <drm/drm_gem_framebuffer_helper.h>
39#include <drm/drm_managed.h>
40#include <drm/drm_of.h>
41#include <drm/drm_panel.h>
42#include <drm/drm_plane.h>
43#include <drm/drm_probe_helper.h>
44#include <drm/drm_vblank.h>
45
46#define HWDESC_PALETTE 2
47
48struct ingenic_dma_hwdesc {
49 u32 next;
50 u32 addr;
51 u32 id;
52 u32 cmd;
53 /* extended hw descriptor for jz4780 */
54 u32 offsize;
55 u32 pagewidth;
56 u32 cpos;
57 u32 dessize;
58} __aligned(16);
59
60struct ingenic_dma_hwdescs {
61 struct ingenic_dma_hwdesc hwdesc[3];
62 u16 palette[256] __aligned(16);
63};
64
65struct jz_soc_info {
66 bool needs_dev_clk;
67 bool has_osd;
68 bool has_alpha;
69 bool map_noncoherent;
70 bool use_extended_hwdesc;
71 bool plane_f0_not_working;
72 u32 max_burst;
73 unsigned int max_width, max_height;
74 const u32 *formats_f0, *formats_f1;
75 unsigned int num_formats_f0, num_formats_f1;
76};
77
78struct ingenic_drm_private_state {
79 struct drm_private_state base;
80 bool use_palette;
81};
82
83struct ingenic_drm {
84 struct drm_device drm;
85 /*
86 * f1 (aka. foreground1) is our primary plane, on top of which
87 * f0 (aka. foreground0) can be overlayed. Z-order is fixed in
88 * hardware and cannot be changed.
89 */
90 struct drm_plane f0, f1, *ipu_plane;
91 struct drm_crtc crtc;
92
93 struct device *dev;
94 struct regmap *map;
95 struct clk *lcd_clk, *pix_clk;
96 const struct jz_soc_info *soc_info;
97
98 struct ingenic_dma_hwdescs *dma_hwdescs;
99 dma_addr_t dma_hwdescs_phys;
100
101 bool panel_is_sharp;
102 bool no_vblank;
103
104 /*
105 * clk_mutex is used to synchronize the pixel clock rate update with
106 * the VBLANK. When the pixel clock's parent clock needs to be updated,
107 * clock_nb's notifier function will lock the mutex, then wait until the
108 * next VBLANK. At that point, the parent clock's rate can be updated,
109 * and the mutex is then unlocked. If an atomic commit happens in the
110 * meantime, it will lock on the mutex, effectively waiting until the
111 * clock update process finishes. Finally, the pixel clock's rate will
112 * be recomputed when the mutex has been released, in the pending atomic
113 * commit, or a future one.
114 */
115 struct mutex clk_mutex;
116 bool update_clk_rate;
117 struct notifier_block clock_nb;
118
119 struct drm_private_obj private_obj;
120};
121
122struct ingenic_drm_bridge {
123 struct drm_encoder encoder;
124 struct drm_bridge bridge, *next_bridge;
125
126 struct drm_bus_cfg bus_cfg;
127};
128
129static inline struct ingenic_drm_bridge *
130to_ingenic_drm_bridge(struct drm_encoder *encoder)
131{
132 return container_of(encoder, struct ingenic_drm_bridge, encoder);
133}
134
135static inline struct ingenic_drm_private_state *
136to_ingenic_drm_priv_state(struct drm_private_state *state)
137{
138 return container_of(state, struct ingenic_drm_private_state, base);
139}
140
141static struct ingenic_drm_private_state *
142ingenic_drm_get_priv_state(struct ingenic_drm *priv, struct drm_atomic_state *state)
143{
144 struct drm_private_state *priv_state;
145
146 priv_state = drm_atomic_get_private_obj_state(state, &priv->private_obj);
147 if (IS_ERR(priv_state))
148 return ERR_CAST(priv_state);
149
150 return to_ingenic_drm_priv_state(priv_state);
151}
152
153static struct ingenic_drm_private_state *
154ingenic_drm_get_new_priv_state(struct ingenic_drm *priv, struct drm_atomic_state *state)
155{
156 struct drm_private_state *priv_state;
157
158 priv_state = drm_atomic_get_new_private_obj_state(state, &priv->private_obj);
159 if (!priv_state)
160 return NULL;
161
162 return to_ingenic_drm_priv_state(priv_state);
163}
164
165static bool ingenic_drm_writeable_reg(struct device *dev, unsigned int reg)
166{
167 switch (reg) {
168 case JZ_REG_LCD_IID:
169 case JZ_REG_LCD_SA0:
170 case JZ_REG_LCD_FID0:
171 case JZ_REG_LCD_CMD0:
172 case JZ_REG_LCD_SA1:
173 case JZ_REG_LCD_FID1:
174 case JZ_REG_LCD_CMD1:
175 return false;
176 default:
177 return true;
178 }
179}
180
181static const struct regmap_config ingenic_drm_regmap_config = {
182 .reg_bits = 32,
183 .val_bits = 32,
184 .reg_stride = 4,
185
186 .writeable_reg = ingenic_drm_writeable_reg,
187};
188
189static inline struct ingenic_drm *drm_device_get_priv(struct drm_device *drm)
190{
191 return container_of(drm, struct ingenic_drm, drm);
192}
193
194static inline struct ingenic_drm *drm_crtc_get_priv(struct drm_crtc *crtc)
195{
196 return container_of(crtc, struct ingenic_drm, crtc);
197}
198
199static inline struct ingenic_drm *drm_nb_get_priv(struct notifier_block *nb)
200{
201 return container_of(nb, struct ingenic_drm, clock_nb);
202}
203
204static inline dma_addr_t dma_hwdesc_addr(const struct ingenic_drm *priv,
205 unsigned int idx)
206{
207 u32 offset = offsetof(struct ingenic_dma_hwdescs, hwdesc[idx]);
208
209 return priv->dma_hwdescs_phys + offset;
210}
211
212static int ingenic_drm_update_pixclk(struct notifier_block *nb,
213 unsigned long action,
214 void *data)
215{
216 struct ingenic_drm *priv = drm_nb_get_priv(nb);
217
218 switch (action) {
219 case PRE_RATE_CHANGE:
220 mutex_lock(&priv->clk_mutex);
221 priv->update_clk_rate = true;
222 drm_crtc_wait_one_vblank(&priv->crtc);
223 return NOTIFY_OK;
224 default:
225 mutex_unlock(&priv->clk_mutex);
226 return NOTIFY_OK;
227 }
228}
229
230static void ingenic_drm_bridge_atomic_enable(struct drm_bridge *bridge,
231 struct drm_bridge_state *old_bridge_state)
232{
233 struct ingenic_drm *priv = drm_device_get_priv(bridge->dev);
234
235 regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
236
237 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
238 JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE,
239 JZ_LCD_CTRL_ENABLE);
240}
241
242static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
243 struct drm_atomic_state *state)
244{
245 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
246 struct ingenic_drm_private_state *priv_state;
247 unsigned int next_id;
248
249 priv_state = ingenic_drm_get_priv_state(priv, state);
250 if (WARN_ON(IS_ERR(priv_state)))
251 return;
252
253 /* Set addresses of our DMA descriptor chains */
254 next_id = priv_state->use_palette ? HWDESC_PALETTE : 0;
255 regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv, next_id));
256 regmap_write(priv->map, JZ_REG_LCD_DA1, dma_hwdesc_addr(priv, 1));
257
258 drm_crtc_vblank_on(crtc);
259}
260
261static void ingenic_drm_bridge_atomic_disable(struct drm_bridge *bridge,
262 struct drm_bridge_state *old_bridge_state)
263{
264 struct ingenic_drm *priv = drm_device_get_priv(bridge->dev);
265 unsigned int var;
266
267 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
268 JZ_LCD_CTRL_DISABLE, JZ_LCD_CTRL_DISABLE);
269
270 regmap_read_poll_timeout(priv->map, JZ_REG_LCD_STATE, var,
271 var & JZ_LCD_STATE_DISABLED,
272 1000, 0);
273}
274
275static void ingenic_drm_crtc_atomic_disable(struct drm_crtc *crtc,
276 struct drm_atomic_state *state)
277{
278 drm_crtc_vblank_off(crtc);
279}
280
281static void ingenic_drm_crtc_update_timings(struct ingenic_drm *priv,
282 struct drm_display_mode *mode)
283{
284 unsigned int vpe, vds, vde, vt, hpe, hds, hde, ht;
285
286 vpe = mode->crtc_vsync_end - mode->crtc_vsync_start;
287 vds = mode->crtc_vtotal - mode->crtc_vsync_start;
288 vde = vds + mode->crtc_vdisplay;
289 vt = vde + mode->crtc_vsync_start - mode->crtc_vdisplay;
290
291 hpe = mode->crtc_hsync_end - mode->crtc_hsync_start;
292 hds = mode->crtc_htotal - mode->crtc_hsync_start;
293 hde = hds + mode->crtc_hdisplay;
294 ht = hde + mode->crtc_hsync_start - mode->crtc_hdisplay;
295
296 regmap_write(priv->map, JZ_REG_LCD_VSYNC,
297 0 << JZ_LCD_VSYNC_VPS_OFFSET |
298 vpe << JZ_LCD_VSYNC_VPE_OFFSET);
299
300 regmap_write(priv->map, JZ_REG_LCD_HSYNC,
301 0 << JZ_LCD_HSYNC_HPS_OFFSET |
302 hpe << JZ_LCD_HSYNC_HPE_OFFSET);
303
304 regmap_write(priv->map, JZ_REG_LCD_VAT,
305 ht << JZ_LCD_VAT_HT_OFFSET |
306 vt << JZ_LCD_VAT_VT_OFFSET);
307
308 regmap_write(priv->map, JZ_REG_LCD_DAH,
309 hds << JZ_LCD_DAH_HDS_OFFSET |
310 hde << JZ_LCD_DAH_HDE_OFFSET);
311 regmap_write(priv->map, JZ_REG_LCD_DAV,
312 vds << JZ_LCD_DAV_VDS_OFFSET |
313 vde << JZ_LCD_DAV_VDE_OFFSET);
314
315 if (priv->panel_is_sharp) {
316 regmap_write(priv->map, JZ_REG_LCD_PS, hde << 16 | (hde + 1));
317 regmap_write(priv->map, JZ_REG_LCD_CLS, hde << 16 | (hde + 1));
318 regmap_write(priv->map, JZ_REG_LCD_SPL, hpe << 16 | (hpe + 1));
319 regmap_write(priv->map, JZ_REG_LCD_REV, mode->htotal << 16);
320 }
321
322 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
323 JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_MASK,
324 JZ_LCD_CTRL_OFUP | priv->soc_info->max_burst);
325
326 /*
327 * IPU restart - specify how much time the LCDC will wait before
328 * transferring a new frame from the IPU. The value is the one
329 * suggested in the programming manual.
330 */
331 regmap_write(priv->map, JZ_REG_LCD_IPUR, JZ_LCD_IPUR_IPUREN |
332 (ht * vpe / 3) << JZ_LCD_IPUR_IPUR_LSB);
333}
334
335static int ingenic_drm_crtc_atomic_check(struct drm_crtc *crtc,
336 struct drm_atomic_state *state)
337{
338 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
339 crtc);
340 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
341 struct drm_plane_state *f1_state, *f0_state, *ipu_state = NULL;
342
343 if (crtc_state->gamma_lut &&
344 drm_color_lut_size(crtc_state->gamma_lut) != ARRAY_SIZE(priv->dma_hwdescs->palette)) {
345 dev_dbg(priv->dev, "Invalid palette size\n");
346 return -EINVAL;
347 }
348
349 if (drm_atomic_crtc_needs_modeset(crtc_state) && priv->soc_info->has_osd) {
350 f1_state = drm_atomic_get_plane_state(crtc_state->state,
351 &priv->f1);
352 if (IS_ERR(f1_state))
353 return PTR_ERR(f1_state);
354
355 f0_state = drm_atomic_get_plane_state(crtc_state->state,
356 &priv->f0);
357 if (IS_ERR(f0_state))
358 return PTR_ERR(f0_state);
359
360 if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && priv->ipu_plane) {
361 ipu_state = drm_atomic_get_plane_state(crtc_state->state,
362 priv->ipu_plane);
363 if (IS_ERR(ipu_state))
364 return PTR_ERR(ipu_state);
365
366 /* IPU and F1 planes cannot be enabled at the same time. */
367 if (f1_state->fb && ipu_state->fb) {
368 dev_dbg(priv->dev, "Cannot enable both F1 and IPU\n");
369 return -EINVAL;
370 }
371 }
372
373 /* If all the planes are disabled, we won't get a VBLANK IRQ */
374 priv->no_vblank = !f1_state->fb && !f0_state->fb &&
375 !(ipu_state && ipu_state->fb);
376 }
377
378 return 0;
379}
380
381static enum drm_mode_status
382ingenic_drm_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
383{
384 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
385 long rate;
386
387 if (mode->hdisplay > priv->soc_info->max_width)
388 return MODE_BAD_HVALUE;
389 if (mode->vdisplay > priv->soc_info->max_height)
390 return MODE_BAD_VVALUE;
391
392 rate = clk_round_rate(priv->pix_clk, mode->clock * 1000);
393 if (rate < 0)
394 return MODE_CLOCK_RANGE;
395
396 return MODE_OK;
397}
398
399static void ingenic_drm_crtc_atomic_begin(struct drm_crtc *crtc,
400 struct drm_atomic_state *state)
401{
402 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
403 crtc);
404 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
405 u32 ctrl = 0;
406
407 if (priv->soc_info->has_osd &&
408 drm_atomic_crtc_needs_modeset(crtc_state)) {
409 /*
410 * If IPU plane is enabled, enable IPU as source for the F1
411 * plane; otherwise use regular DMA.
412 */
413 if (priv->ipu_plane && priv->ipu_plane->state->fb)
414 ctrl |= JZ_LCD_OSDCTRL_IPU;
415
416 regmap_update_bits(priv->map, JZ_REG_LCD_OSDCTRL,
417 JZ_LCD_OSDCTRL_IPU, ctrl);
418 }
419}
420
421static void ingenic_drm_crtc_atomic_flush(struct drm_crtc *crtc,
422 struct drm_atomic_state *state)
423{
424 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
425 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
426 crtc);
427 struct drm_pending_vblank_event *event = crtc_state->event;
428
429 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
430 ingenic_drm_crtc_update_timings(priv, &crtc_state->adjusted_mode);
431 priv->update_clk_rate = true;
432 }
433
434 if (priv->update_clk_rate) {
435 mutex_lock(&priv->clk_mutex);
436 clk_set_rate(priv->pix_clk,
437 crtc_state->adjusted_mode.crtc_clock * 1000);
438 priv->update_clk_rate = false;
439 mutex_unlock(&priv->clk_mutex);
440 }
441
442 if (event) {
443 crtc_state->event = NULL;
444
445 spin_lock_irq(&crtc->dev->event_lock);
446 if (drm_crtc_vblank_get(crtc) == 0)
447 drm_crtc_arm_vblank_event(crtc, event);
448 else
449 drm_crtc_send_vblank_event(crtc, event);
450 spin_unlock_irq(&crtc->dev->event_lock);
451 }
452}
453
454static int ingenic_drm_plane_atomic_check(struct drm_plane *plane,
455 struct drm_atomic_state *state)
456{
457 struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state,
458 plane);
459 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
460 plane);
461 struct ingenic_drm *priv = drm_device_get_priv(plane->dev);
462 struct ingenic_drm_private_state *priv_state;
463 struct drm_crtc_state *crtc_state;
464 struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
465 int ret;
466
467 if (!crtc)
468 return 0;
469
470 if (priv->soc_info->plane_f0_not_working && plane == &priv->f0)
471 return -EINVAL;
472
473 crtc_state = drm_atomic_get_existing_crtc_state(state,
474 crtc);
475 if (WARN_ON(!crtc_state))
476 return -EINVAL;
477
478 priv_state = ingenic_drm_get_priv_state(priv, state);
479 if (IS_ERR(priv_state))
480 return PTR_ERR(priv_state);
481
482 ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
483 DRM_PLANE_NO_SCALING,
484 DRM_PLANE_NO_SCALING,
485 priv->soc_info->has_osd,
486 true);
487 if (ret)
488 return ret;
489
490 /*
491 * If OSD is not available, check that the width/height match.
492 * Note that state->src_* are in 16.16 fixed-point format.
493 */
494 if (!priv->soc_info->has_osd &&
495 (new_plane_state->src_x != 0 ||
496 (new_plane_state->src_w >> 16) != new_plane_state->crtc_w ||
497 (new_plane_state->src_h >> 16) != new_plane_state->crtc_h))
498 return -EINVAL;
499
500 priv_state->use_palette = new_plane_state->fb &&
501 new_plane_state->fb->format->format == DRM_FORMAT_C8;
502
503 /*
504 * Require full modeset if enabling or disabling a plane, or changing
505 * its position, size or depth.
506 */
507 if (priv->soc_info->has_osd &&
508 (!old_plane_state->fb || !new_plane_state->fb ||
509 old_plane_state->crtc_x != new_plane_state->crtc_x ||
510 old_plane_state->crtc_y != new_plane_state->crtc_y ||
511 old_plane_state->crtc_w != new_plane_state->crtc_w ||
512 old_plane_state->crtc_h != new_plane_state->crtc_h ||
513 old_plane_state->fb->format->format != new_plane_state->fb->format->format))
514 crtc_state->mode_changed = true;
515
516 if (priv->soc_info->map_noncoherent)
517 drm_atomic_helper_check_plane_damage(state, new_plane_state);
518
519 return 0;
520}
521
522static void ingenic_drm_plane_enable(struct ingenic_drm *priv,
523 struct drm_plane *plane)
524{
525 unsigned int en_bit;
526
527 if (priv->soc_info->has_osd) {
528 if (plane != &priv->f0)
529 en_bit = JZ_LCD_OSDC_F1EN;
530 else
531 en_bit = JZ_LCD_OSDC_F0EN;
532
533 regmap_set_bits(priv->map, JZ_REG_LCD_OSDC, en_bit);
534 }
535}
536
537void ingenic_drm_plane_disable(struct device *dev, struct drm_plane *plane)
538{
539 struct ingenic_drm *priv = dev_get_drvdata(dev);
540 unsigned int en_bit;
541
542 if (priv->soc_info->has_osd) {
543 if (plane != &priv->f0)
544 en_bit = JZ_LCD_OSDC_F1EN;
545 else
546 en_bit = JZ_LCD_OSDC_F0EN;
547
548 regmap_clear_bits(priv->map, JZ_REG_LCD_OSDC, en_bit);
549 }
550}
551
552static void ingenic_drm_plane_atomic_disable(struct drm_plane *plane,
553 struct drm_atomic_state *state)
554{
555 struct ingenic_drm *priv = drm_device_get_priv(plane->dev);
556
557 ingenic_drm_plane_disable(priv->dev, plane);
558}
559
560void ingenic_drm_plane_config(struct device *dev,
561 struct drm_plane *plane, u32 fourcc)
562{
563 struct ingenic_drm *priv = dev_get_drvdata(dev);
564 struct drm_plane_state *state = plane->state;
565 unsigned int xy_reg, size_reg;
566 unsigned int ctrl = 0;
567
568 ingenic_drm_plane_enable(priv, plane);
569
570 if (priv->soc_info->has_osd && plane != &priv->f0) {
571 switch (fourcc) {
572 case DRM_FORMAT_XRGB1555:
573 ctrl |= JZ_LCD_OSDCTRL_RGB555;
574 fallthrough;
575 case DRM_FORMAT_RGB565:
576 ctrl |= JZ_LCD_OSDCTRL_BPP_15_16;
577 break;
578 case DRM_FORMAT_RGB888:
579 ctrl |= JZ_LCD_OSDCTRL_BPP_24_COMP;
580 break;
581 case DRM_FORMAT_XRGB8888:
582 ctrl |= JZ_LCD_OSDCTRL_BPP_18_24;
583 break;
584 case DRM_FORMAT_XRGB2101010:
585 ctrl |= JZ_LCD_OSDCTRL_BPP_30;
586 break;
587 }
588
589 regmap_update_bits(priv->map, JZ_REG_LCD_OSDCTRL,
590 JZ_LCD_OSDCTRL_BPP_MASK, ctrl);
591 } else {
592 switch (fourcc) {
593 case DRM_FORMAT_C8:
594 ctrl |= JZ_LCD_CTRL_BPP_8;
595 break;
596 case DRM_FORMAT_XRGB1555:
597 ctrl |= JZ_LCD_CTRL_RGB555;
598 fallthrough;
599 case DRM_FORMAT_RGB565:
600 ctrl |= JZ_LCD_CTRL_BPP_15_16;
601 break;
602 case DRM_FORMAT_RGB888:
603 ctrl |= JZ_LCD_CTRL_BPP_24_COMP;
604 break;
605 case DRM_FORMAT_XRGB8888:
606 ctrl |= JZ_LCD_CTRL_BPP_18_24;
607 break;
608 case DRM_FORMAT_XRGB2101010:
609 ctrl |= JZ_LCD_CTRL_BPP_30;
610 break;
611 }
612
613 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
614 JZ_LCD_CTRL_BPP_MASK, ctrl);
615 }
616
617 if (priv->soc_info->has_osd) {
618 if (plane != &priv->f0) {
619 xy_reg = JZ_REG_LCD_XYP1;
620 size_reg = JZ_REG_LCD_SIZE1;
621 } else {
622 xy_reg = JZ_REG_LCD_XYP0;
623 size_reg = JZ_REG_LCD_SIZE0;
624 }
625
626 regmap_write(priv->map, xy_reg,
627 state->crtc_x << JZ_LCD_XYP01_XPOS_LSB |
628 state->crtc_y << JZ_LCD_XYP01_YPOS_LSB);
629 regmap_write(priv->map, size_reg,
630 state->crtc_w << JZ_LCD_SIZE01_WIDTH_LSB |
631 state->crtc_h << JZ_LCD_SIZE01_HEIGHT_LSB);
632 }
633}
634
635bool ingenic_drm_map_noncoherent(const struct device *dev)
636{
637 const struct ingenic_drm *priv = dev_get_drvdata(dev);
638
639 return priv->soc_info->map_noncoherent;
640}
641
642static void ingenic_drm_update_palette(struct ingenic_drm *priv,
643 const struct drm_color_lut *lut)
644{
645 unsigned int i;
646
647 for (i = 0; i < ARRAY_SIZE(priv->dma_hwdescs->palette); i++) {
648 u16 color = drm_color_lut_extract(lut[i].red, 5) << 11
649 | drm_color_lut_extract(lut[i].green, 6) << 5
650 | drm_color_lut_extract(lut[i].blue, 5);
651
652 priv->dma_hwdescs->palette[i] = color;
653 }
654}
655
656static void ingenic_drm_plane_atomic_update(struct drm_plane *plane,
657 struct drm_atomic_state *state)
658{
659 struct ingenic_drm *priv = drm_device_get_priv(plane->dev);
660 struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, plane);
661 struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, plane);
662 unsigned int width, height, cpp, next_id, plane_id;
663 struct ingenic_drm_private_state *priv_state;
664 struct drm_crtc_state *crtc_state;
665 struct ingenic_dma_hwdesc *hwdesc;
666 dma_addr_t addr;
667 u32 fourcc;
668
669 if (newstate && newstate->fb) {
670 if (priv->soc_info->map_noncoherent)
671 drm_fb_dma_sync_non_coherent(&priv->drm, oldstate, newstate);
672
673 crtc_state = newstate->crtc->state;
674 plane_id = !!(priv->soc_info->has_osd && plane != &priv->f0);
675
676 addr = drm_fb_dma_get_gem_addr(newstate->fb, newstate, 0);
677 width = newstate->src_w >> 16;
678 height = newstate->src_h >> 16;
679 cpp = newstate->fb->format->cpp[0];
680
681 priv_state = ingenic_drm_get_new_priv_state(priv, state);
682 next_id = (priv_state && priv_state->use_palette) ? HWDESC_PALETTE : plane_id;
683
684 hwdesc = &priv->dma_hwdescs->hwdesc[plane_id];
685 hwdesc->addr = addr;
686 hwdesc->cmd = JZ_LCD_CMD_EOF_IRQ | (width * height * cpp / 4);
687 hwdesc->next = dma_hwdesc_addr(priv, next_id);
688
689 if (priv->soc_info->use_extended_hwdesc) {
690 hwdesc->cmd |= JZ_LCD_CMD_FRM_ENABLE;
691
692 /* Extended 8-byte descriptor */
693 hwdesc->cpos = 0;
694 hwdesc->offsize = 0;
695 hwdesc->pagewidth = 0;
696
697 switch (newstate->fb->format->format) {
698 case DRM_FORMAT_XRGB1555:
699 hwdesc->cpos |= JZ_LCD_CPOS_RGB555;
700 fallthrough;
701 case DRM_FORMAT_RGB565:
702 hwdesc->cpos |= JZ_LCD_CPOS_BPP_15_16;
703 break;
704 case DRM_FORMAT_XRGB8888:
705 hwdesc->cpos |= JZ_LCD_CPOS_BPP_18_24;
706 break;
707 }
708 hwdesc->cpos |= (JZ_LCD_CPOS_COEFFICIENT_1 <<
709 JZ_LCD_CPOS_COEFFICIENT_OFFSET);
710 hwdesc->dessize =
711 (0xff << JZ_LCD_DESSIZE_ALPHA_OFFSET) |
712 FIELD_PREP(JZ_LCD_DESSIZE_HEIGHT_MASK, height - 1) |
713 FIELD_PREP(JZ_LCD_DESSIZE_WIDTH_MASK, width - 1);
714 }
715
716 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
717 fourcc = newstate->fb->format->format;
718
719 ingenic_drm_plane_config(priv->dev, plane, fourcc);
720
721 crtc_state->color_mgmt_changed = fourcc == DRM_FORMAT_C8;
722 }
723
724 if (crtc_state->color_mgmt_changed)
725 ingenic_drm_update_palette(priv, crtc_state->gamma_lut->data);
726 }
727}
728
729static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
730 struct drm_crtc_state *crtc_state,
731 struct drm_connector_state *conn_state)
732{
733 struct ingenic_drm *priv = drm_device_get_priv(encoder->dev);
734 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
735 struct ingenic_drm_bridge *bridge = to_ingenic_drm_bridge(encoder);
736 unsigned int cfg, rgbcfg = 0;
737
738 priv->panel_is_sharp = bridge->bus_cfg.flags & DRM_BUS_FLAG_SHARP_SIGNALS;
739
740 if (priv->panel_is_sharp) {
741 cfg = JZ_LCD_CFG_MODE_SPECIAL_TFT_1 | JZ_LCD_CFG_REV_POLARITY;
742 } else {
743 cfg = JZ_LCD_CFG_PS_DISABLE | JZ_LCD_CFG_CLS_DISABLE
744 | JZ_LCD_CFG_SPL_DISABLE | JZ_LCD_CFG_REV_DISABLE;
745 }
746
747 if (priv->soc_info->use_extended_hwdesc)
748 cfg |= JZ_LCD_CFG_DESCRIPTOR_8;
749
750 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
751 cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW;
752 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
753 cfg |= JZ_LCD_CFG_VSYNC_ACTIVE_LOW;
754 if (bridge->bus_cfg.flags & DRM_BUS_FLAG_DE_LOW)
755 cfg |= JZ_LCD_CFG_DE_ACTIVE_LOW;
756 if (bridge->bus_cfg.flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
757 cfg |= JZ_LCD_CFG_PCLK_FALLING_EDGE;
758
759 if (!priv->panel_is_sharp) {
760 if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV) {
761 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
762 cfg |= JZ_LCD_CFG_MODE_TV_OUT_I;
763 else
764 cfg |= JZ_LCD_CFG_MODE_TV_OUT_P;
765 } else {
766 switch (bridge->bus_cfg.format) {
767 case MEDIA_BUS_FMT_RGB565_1X16:
768 cfg |= JZ_LCD_CFG_MODE_GENERIC_16BIT;
769 break;
770 case MEDIA_BUS_FMT_RGB666_1X18:
771 cfg |= JZ_LCD_CFG_MODE_GENERIC_18BIT;
772 break;
773 case MEDIA_BUS_FMT_RGB888_1X24:
774 cfg |= JZ_LCD_CFG_MODE_GENERIC_24BIT;
775 break;
776 case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
777 rgbcfg = JZ_LCD_RGBC_EVEN_GBR | JZ_LCD_RGBC_ODD_RGB;
778 fallthrough;
779 case MEDIA_BUS_FMT_RGB888_3X8:
780 cfg |= JZ_LCD_CFG_MODE_8BIT_SERIAL;
781 break;
782 default:
783 break;
784 }
785 }
786 }
787
788 regmap_write(priv->map, JZ_REG_LCD_CFG, cfg);
789 regmap_write(priv->map, JZ_REG_LCD_RGBC, rgbcfg);
790}
791
792static int ingenic_drm_bridge_attach(struct drm_bridge *bridge,
793 enum drm_bridge_attach_flags flags)
794{
795 struct ingenic_drm_bridge *ib = to_ingenic_drm_bridge(bridge->encoder);
796
797 return drm_bridge_attach(bridge->encoder, ib->next_bridge,
798 &ib->bridge, flags);
799}
800
801static int ingenic_drm_bridge_atomic_check(struct drm_bridge *bridge,
802 struct drm_bridge_state *bridge_state,
803 struct drm_crtc_state *crtc_state,
804 struct drm_connector_state *conn_state)
805{
806 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
807 struct ingenic_drm_bridge *ib = to_ingenic_drm_bridge(bridge->encoder);
808
809 ib->bus_cfg = bridge_state->output_bus_cfg;
810
811 if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV)
812 return 0;
813
814 switch (bridge_state->output_bus_cfg.format) {
815 case MEDIA_BUS_FMT_RGB888_3X8:
816 case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
817 /*
818 * The LCD controller expects timing values in dot-clock ticks,
819 * which is 3x the timing values in pixels when using a 3x8-bit
820 * display; but it will count the display area size in pixels
821 * either way. Go figure.
822 */
823 mode->crtc_clock = mode->clock * 3;
824 mode->crtc_hsync_start = mode->hsync_start * 3 - mode->hdisplay * 2;
825 mode->crtc_hsync_end = mode->hsync_end * 3 - mode->hdisplay * 2;
826 mode->crtc_hdisplay = mode->hdisplay;
827 mode->crtc_htotal = mode->htotal * 3 - mode->hdisplay * 2;
828 return 0;
829 case MEDIA_BUS_FMT_RGB565_1X16:
830 case MEDIA_BUS_FMT_RGB666_1X18:
831 case MEDIA_BUS_FMT_RGB888_1X24:
832 return 0;
833 default:
834 return -EINVAL;
835 }
836}
837
838static u32 *
839ingenic_drm_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
840 struct drm_bridge_state *bridge_state,
841 struct drm_crtc_state *crtc_state,
842 struct drm_connector_state *conn_state,
843 u32 output_fmt,
844 unsigned int *num_input_fmts)
845{
846 switch (output_fmt) {
847 case MEDIA_BUS_FMT_RGB888_1X24:
848 case MEDIA_BUS_FMT_RGB666_1X18:
849 case MEDIA_BUS_FMT_RGB565_1X16:
850 case MEDIA_BUS_FMT_RGB888_3X8:
851 case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
852 break;
853 default:
854 *num_input_fmts = 0;
855 return NULL;
856 }
857
858 return drm_atomic_helper_bridge_propagate_bus_fmt(bridge, bridge_state,
859 crtc_state, conn_state,
860 output_fmt,
861 num_input_fmts);
862}
863
864static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg)
865{
866 struct ingenic_drm *priv = drm_device_get_priv(arg);
867 unsigned int state;
868
869 regmap_read(priv->map, JZ_REG_LCD_STATE, &state);
870
871 regmap_update_bits(priv->map, JZ_REG_LCD_STATE,
872 JZ_LCD_STATE_EOF_IRQ, 0);
873
874 if (state & JZ_LCD_STATE_EOF_IRQ)
875 drm_crtc_handle_vblank(&priv->crtc);
876
877 return IRQ_HANDLED;
878}
879
880static int ingenic_drm_enable_vblank(struct drm_crtc *crtc)
881{
882 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
883
884 if (priv->no_vblank)
885 return -EINVAL;
886
887 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
888 JZ_LCD_CTRL_EOF_IRQ, JZ_LCD_CTRL_EOF_IRQ);
889
890 return 0;
891}
892
893static void ingenic_drm_disable_vblank(struct drm_crtc *crtc)
894{
895 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
896
897 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_EOF_IRQ, 0);
898}
899
900static struct drm_framebuffer *
901ingenic_drm_gem_fb_create(struct drm_device *drm, struct drm_file *file,
902 const struct drm_mode_fb_cmd2 *mode_cmd)
903{
904 struct ingenic_drm *priv = drm_device_get_priv(drm);
905
906 if (priv->soc_info->map_noncoherent)
907 return drm_gem_fb_create_with_dirty(drm, file, mode_cmd);
908
909 return drm_gem_fb_create(drm, file, mode_cmd);
910}
911
912static struct drm_gem_object *
913ingenic_drm_gem_create_object(struct drm_device *drm, size_t size)
914{
915 struct ingenic_drm *priv = drm_device_get_priv(drm);
916 struct drm_gem_dma_object *obj;
917
918 obj = kzalloc(sizeof(*obj), GFP_KERNEL);
919 if (!obj)
920 return ERR_PTR(-ENOMEM);
921
922 obj->map_noncoherent = priv->soc_info->map_noncoherent;
923
924 return &obj->base;
925}
926
927static struct drm_private_state *
928ingenic_drm_duplicate_state(struct drm_private_obj *obj)
929{
930 struct ingenic_drm_private_state *state = to_ingenic_drm_priv_state(obj->state);
931
932 state = kmemdup(state, sizeof(*state), GFP_KERNEL);
933 if (!state)
934 return NULL;
935
936 __drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
937
938 return &state->base;
939}
940
941static void ingenic_drm_destroy_state(struct drm_private_obj *obj,
942 struct drm_private_state *state)
943{
944 struct ingenic_drm_private_state *priv_state = to_ingenic_drm_priv_state(state);
945
946 kfree(priv_state);
947}
948
949DEFINE_DRM_GEM_DMA_FOPS(ingenic_drm_fops);
950
951static const struct drm_driver ingenic_drm_driver_data = {
952 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
953 .name = "ingenic-drm",
954 .desc = "DRM module for Ingenic SoCs",
955 .date = "20200716",
956 .major = 1,
957 .minor = 1,
958 .patchlevel = 0,
959
960 .fops = &ingenic_drm_fops,
961 .gem_create_object = ingenic_drm_gem_create_object,
962 DRM_GEM_DMA_DRIVER_OPS,
963};
964
965static const struct drm_plane_funcs ingenic_drm_primary_plane_funcs = {
966 .update_plane = drm_atomic_helper_update_plane,
967 .disable_plane = drm_atomic_helper_disable_plane,
968 .reset = drm_atomic_helper_plane_reset,
969 .destroy = drm_plane_cleanup,
970
971 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
972 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
973};
974
975static const struct drm_crtc_funcs ingenic_drm_crtc_funcs = {
976 .set_config = drm_atomic_helper_set_config,
977 .page_flip = drm_atomic_helper_page_flip,
978 .reset = drm_atomic_helper_crtc_reset,
979 .destroy = drm_crtc_cleanup,
980
981 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
982 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
983
984 .enable_vblank = ingenic_drm_enable_vblank,
985 .disable_vblank = ingenic_drm_disable_vblank,
986};
987
988static const struct drm_plane_helper_funcs ingenic_drm_plane_helper_funcs = {
989 .atomic_update = ingenic_drm_plane_atomic_update,
990 .atomic_check = ingenic_drm_plane_atomic_check,
991 .atomic_disable = ingenic_drm_plane_atomic_disable,
992};
993
994static const struct drm_crtc_helper_funcs ingenic_drm_crtc_helper_funcs = {
995 .atomic_enable = ingenic_drm_crtc_atomic_enable,
996 .atomic_disable = ingenic_drm_crtc_atomic_disable,
997 .atomic_begin = ingenic_drm_crtc_atomic_begin,
998 .atomic_flush = ingenic_drm_crtc_atomic_flush,
999 .atomic_check = ingenic_drm_crtc_atomic_check,
1000 .mode_valid = ingenic_drm_crtc_mode_valid,
1001};
1002
1003static const struct drm_encoder_helper_funcs ingenic_drm_encoder_helper_funcs = {
1004 .atomic_mode_set = ingenic_drm_encoder_atomic_mode_set,
1005};
1006
1007static const struct drm_bridge_funcs ingenic_drm_bridge_funcs = {
1008 .attach = ingenic_drm_bridge_attach,
1009 .atomic_enable = ingenic_drm_bridge_atomic_enable,
1010 .atomic_disable = ingenic_drm_bridge_atomic_disable,
1011 .atomic_check = ingenic_drm_bridge_atomic_check,
1012 .atomic_reset = drm_atomic_helper_bridge_reset,
1013 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
1014 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
1015 .atomic_get_input_bus_fmts = ingenic_drm_bridge_atomic_get_input_bus_fmts,
1016};
1017
1018static const struct drm_mode_config_funcs ingenic_drm_mode_config_funcs = {
1019 .fb_create = ingenic_drm_gem_fb_create,
1020 .atomic_check = drm_atomic_helper_check,
1021 .atomic_commit = drm_atomic_helper_commit,
1022};
1023
1024static struct drm_mode_config_helper_funcs ingenic_drm_mode_config_helpers = {
1025 .atomic_commit_tail = drm_atomic_helper_commit_tail,
1026};
1027
1028static const struct drm_private_state_funcs ingenic_drm_private_state_funcs = {
1029 .atomic_duplicate_state = ingenic_drm_duplicate_state,
1030 .atomic_destroy_state = ingenic_drm_destroy_state,
1031};
1032
1033static void ingenic_drm_unbind_all(void *d)
1034{
1035 struct ingenic_drm *priv = d;
1036
1037 component_unbind_all(priv->dev, &priv->drm);
1038}
1039
1040static void __maybe_unused ingenic_drm_release_rmem(void *d)
1041{
1042 of_reserved_mem_device_release(d);
1043}
1044
1045static void ingenic_drm_configure_hwdesc(struct ingenic_drm *priv,
1046 unsigned int hwdesc,
1047 unsigned int next_hwdesc, u32 id)
1048{
1049 struct ingenic_dma_hwdesc *desc = &priv->dma_hwdescs->hwdesc[hwdesc];
1050
1051 desc->next = dma_hwdesc_addr(priv, next_hwdesc);
1052 desc->id = id;
1053}
1054
1055static void ingenic_drm_configure_hwdesc_palette(struct ingenic_drm *priv)
1056{
1057 struct ingenic_dma_hwdesc *desc;
1058
1059 ingenic_drm_configure_hwdesc(priv, HWDESC_PALETTE, 0, 0xc0);
1060
1061 desc = &priv->dma_hwdescs->hwdesc[HWDESC_PALETTE];
1062 desc->addr = priv->dma_hwdescs_phys
1063 + offsetof(struct ingenic_dma_hwdescs, palette);
1064 desc->cmd = JZ_LCD_CMD_ENABLE_PAL
1065 | (sizeof(priv->dma_hwdescs->palette) / 4);
1066}
1067
1068static void ingenic_drm_configure_hwdesc_plane(struct ingenic_drm *priv,
1069 unsigned int plane)
1070{
1071 ingenic_drm_configure_hwdesc(priv, plane, plane, 0xf0 | plane);
1072}
1073
1074static void ingenic_drm_atomic_private_obj_fini(struct drm_device *drm, void *private_obj)
1075{
1076 drm_atomic_private_obj_fini(private_obj);
1077}
1078
1079static int ingenic_drm_bind(struct device *dev, bool has_components)
1080{
1081 struct platform_device *pdev = to_platform_device(dev);
1082 struct ingenic_drm_private_state *private_state;
1083 const struct jz_soc_info *soc_info;
1084 struct ingenic_drm *priv;
1085 struct clk *parent_clk;
1086 struct drm_plane *primary;
1087 struct drm_bridge *bridge;
1088 struct drm_panel *panel;
1089 struct drm_connector *connector;
1090 struct drm_encoder *encoder;
1091 struct ingenic_drm_bridge *ib;
1092 struct drm_device *drm;
1093 void __iomem *base;
1094 struct resource *res;
1095 struct regmap_config regmap_config;
1096 long parent_rate;
1097 unsigned int i, clone_mask = 0;
1098 int ret, irq;
1099 u32 osdc = 0;
1100
1101 soc_info = of_device_get_match_data(dev);
1102 if (!soc_info) {
1103 dev_err(dev, "Missing platform data\n");
1104 return -EINVAL;
1105 }
1106
1107 if (IS_ENABLED(CONFIG_OF_RESERVED_MEM)) {
1108 ret = of_reserved_mem_device_init(dev);
1109
1110 if (ret && ret != -ENODEV)
1111 dev_warn(dev, "Failed to get reserved memory: %d\n", ret);
1112
1113 if (!ret) {
1114 ret = devm_add_action_or_reset(dev, ingenic_drm_release_rmem, dev);
1115 if (ret)
1116 return ret;
1117 }
1118 }
1119
1120 priv = devm_drm_dev_alloc(dev, &ingenic_drm_driver_data,
1121 struct ingenic_drm, drm);
1122 if (IS_ERR(priv))
1123 return PTR_ERR(priv);
1124
1125 priv->soc_info = soc_info;
1126 priv->dev = dev;
1127 drm = &priv->drm;
1128
1129 platform_set_drvdata(pdev, priv);
1130
1131 ret = drmm_mode_config_init(drm);
1132 if (ret)
1133 goto err_drvdata;
1134
1135 drm->mode_config.min_width = 0;
1136 drm->mode_config.min_height = 0;
1137 drm->mode_config.max_width = soc_info->max_width;
1138 drm->mode_config.max_height = 4095;
1139 drm->mode_config.funcs = &ingenic_drm_mode_config_funcs;
1140 drm->mode_config.helper_private = &ingenic_drm_mode_config_helpers;
1141
1142 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1143 if (IS_ERR(base)) {
1144 dev_err(dev, "Failed to get memory resource\n");
1145 ret = PTR_ERR(base);
1146 goto err_drvdata;
1147 }
1148
1149 regmap_config = ingenic_drm_regmap_config;
1150 regmap_config.max_register = res->end - res->start;
1151 priv->map = devm_regmap_init_mmio(dev, base,
1152 ®map_config);
1153 if (IS_ERR(priv->map)) {
1154 dev_err(dev, "Failed to create regmap\n");
1155 ret = PTR_ERR(priv->map);
1156 goto err_drvdata;
1157 }
1158
1159 irq = platform_get_irq(pdev, 0);
1160 if (irq < 0) {
1161 ret = irq;
1162 goto err_drvdata;
1163 }
1164
1165 if (soc_info->needs_dev_clk) {
1166 priv->lcd_clk = devm_clk_get(dev, "lcd");
1167 if (IS_ERR(priv->lcd_clk)) {
1168 dev_err(dev, "Failed to get lcd clock\n");
1169 ret = PTR_ERR(priv->lcd_clk);
1170 goto err_drvdata;
1171 }
1172 }
1173
1174 priv->pix_clk = devm_clk_get(dev, "lcd_pclk");
1175 if (IS_ERR(priv->pix_clk)) {
1176 dev_err(dev, "Failed to get pixel clock\n");
1177 ret = PTR_ERR(priv->pix_clk);
1178 goto err_drvdata;
1179 }
1180
1181 priv->dma_hwdescs = dmam_alloc_coherent(dev,
1182 sizeof(*priv->dma_hwdescs),
1183 &priv->dma_hwdescs_phys,
1184 GFP_KERNEL);
1185 if (!priv->dma_hwdescs) {
1186 ret = -ENOMEM;
1187 goto err_drvdata;
1188 }
1189
1190 /* Configure DMA hwdesc for foreground0 plane */
1191 ingenic_drm_configure_hwdesc_plane(priv, 0);
1192
1193 /* Configure DMA hwdesc for foreground1 plane */
1194 ingenic_drm_configure_hwdesc_plane(priv, 1);
1195
1196 /* Configure DMA hwdesc for palette */
1197 ingenic_drm_configure_hwdesc_palette(priv);
1198
1199 primary = priv->soc_info->has_osd ? &priv->f1 : &priv->f0;
1200
1201 drm_plane_helper_add(primary, &ingenic_drm_plane_helper_funcs);
1202
1203 ret = drm_universal_plane_init(drm, primary, 1,
1204 &ingenic_drm_primary_plane_funcs,
1205 priv->soc_info->formats_f1,
1206 priv->soc_info->num_formats_f1,
1207 NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
1208 if (ret) {
1209 dev_err(dev, "Failed to register plane: %i\n", ret);
1210 goto err_drvdata;
1211 }
1212
1213 if (soc_info->map_noncoherent)
1214 drm_plane_enable_fb_damage_clips(&priv->f1);
1215
1216 drm_crtc_helper_add(&priv->crtc, &ingenic_drm_crtc_helper_funcs);
1217
1218 ret = drm_crtc_init_with_planes(drm, &priv->crtc, primary,
1219 NULL, &ingenic_drm_crtc_funcs, NULL);
1220 if (ret) {
1221 dev_err(dev, "Failed to init CRTC: %i\n", ret);
1222 goto err_drvdata;
1223 }
1224
1225 drm_crtc_enable_color_mgmt(&priv->crtc, 0, false,
1226 ARRAY_SIZE(priv->dma_hwdescs->palette));
1227
1228 if (soc_info->has_osd) {
1229 drm_plane_helper_add(&priv->f0,
1230 &ingenic_drm_plane_helper_funcs);
1231
1232 ret = drm_universal_plane_init(drm, &priv->f0, 1,
1233 &ingenic_drm_primary_plane_funcs,
1234 priv->soc_info->formats_f0,
1235 priv->soc_info->num_formats_f0,
1236 NULL, DRM_PLANE_TYPE_OVERLAY,
1237 NULL);
1238 if (ret) {
1239 dev_err(dev, "Failed to register overlay plane: %i\n",
1240 ret);
1241 goto err_drvdata;
1242 }
1243
1244 if (soc_info->map_noncoherent)
1245 drm_plane_enable_fb_damage_clips(&priv->f0);
1246
1247 if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && has_components) {
1248 ret = component_bind_all(dev, drm);
1249 if (ret) {
1250 if (ret != -EPROBE_DEFER)
1251 dev_err(dev, "Failed to bind components: %i\n", ret);
1252 goto err_drvdata;
1253 }
1254
1255 ret = devm_add_action_or_reset(dev, ingenic_drm_unbind_all, priv);
1256 if (ret)
1257 goto err_drvdata;
1258
1259 priv->ipu_plane = drm_plane_from_index(drm, 2);
1260 if (!priv->ipu_plane) {
1261 dev_err(dev, "Failed to retrieve IPU plane\n");
1262 ret = -EINVAL;
1263 goto err_drvdata;
1264 }
1265 }
1266 }
1267
1268 for (i = 0; ; i++) {
1269 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, i, &panel, &bridge);
1270 if (ret) {
1271 if (ret == -ENODEV)
1272 break; /* we're done */
1273 if (ret != -EPROBE_DEFER)
1274 dev_err(dev, "Failed to get bridge handle\n");
1275 goto err_drvdata;
1276 }
1277
1278 if (panel)
1279 bridge = devm_drm_panel_bridge_add_typed(dev, panel,
1280 DRM_MODE_CONNECTOR_DPI);
1281
1282 ib = drmm_encoder_alloc(drm, struct ingenic_drm_bridge, encoder,
1283 NULL, DRM_MODE_ENCODER_DPI, NULL);
1284 if (IS_ERR(ib)) {
1285 ret = PTR_ERR(ib);
1286 dev_err(dev, "Failed to init encoder: %d\n", ret);
1287 goto err_drvdata;
1288 }
1289
1290 encoder = &ib->encoder;
1291 encoder->possible_crtcs = drm_crtc_mask(&priv->crtc);
1292
1293 drm_encoder_helper_add(encoder, &ingenic_drm_encoder_helper_funcs);
1294
1295 ib->bridge.funcs = &ingenic_drm_bridge_funcs;
1296 ib->next_bridge = bridge;
1297
1298 ret = drm_bridge_attach(encoder, &ib->bridge, NULL,
1299 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
1300 if (ret) {
1301 dev_err(dev, "Unable to attach bridge\n");
1302 goto err_drvdata;
1303 }
1304
1305 connector = drm_bridge_connector_init(drm, encoder);
1306 if (IS_ERR(connector)) {
1307 dev_err(dev, "Unable to init connector\n");
1308 ret = PTR_ERR(connector);
1309 goto err_drvdata;
1310 }
1311
1312 drm_connector_attach_encoder(connector, encoder);
1313 }
1314
1315 drm_for_each_encoder(encoder, drm) {
1316 clone_mask |= BIT(drm_encoder_index(encoder));
1317 }
1318
1319 drm_for_each_encoder(encoder, drm) {
1320 encoder->possible_clones = clone_mask;
1321 }
1322
1323 ret = devm_request_irq(dev, irq, ingenic_drm_irq_handler, 0, drm->driver->name, drm);
1324 if (ret) {
1325 dev_err(dev, "Unable to install IRQ handler\n");
1326 goto err_drvdata;
1327 }
1328
1329 ret = drm_vblank_init(drm, 1);
1330 if (ret) {
1331 dev_err(dev, "Failed calling drm_vblank_init()\n");
1332 goto err_drvdata;
1333 }
1334
1335 drm_mode_config_reset(drm);
1336
1337 ret = clk_prepare_enable(priv->pix_clk);
1338 if (ret) {
1339 dev_err(dev, "Unable to start pixel clock\n");
1340 goto err_drvdata;
1341 }
1342
1343 if (priv->lcd_clk) {
1344 parent_clk = clk_get_parent(priv->lcd_clk);
1345 parent_rate = clk_get_rate(parent_clk);
1346
1347 /* LCD Device clock must be 3x the pixel clock for STN panels,
1348 * or 1.5x the pixel clock for TFT panels. To avoid having to
1349 * check for the LCD device clock everytime we do a mode change,
1350 * we set the LCD device clock to the highest rate possible.
1351 */
1352 ret = clk_set_rate(priv->lcd_clk, parent_rate);
1353 if (ret) {
1354 dev_err(dev, "Unable to set LCD clock rate\n");
1355 goto err_pixclk_disable;
1356 }
1357
1358 ret = clk_prepare_enable(priv->lcd_clk);
1359 if (ret) {
1360 dev_err(dev, "Unable to start lcd clock\n");
1361 goto err_pixclk_disable;
1362 }
1363 }
1364
1365 /* Enable OSD if available */
1366 if (soc_info->has_osd)
1367 osdc |= JZ_LCD_OSDC_OSDEN;
1368 if (soc_info->has_alpha)
1369 osdc |= JZ_LCD_OSDC_ALPHAEN;
1370 regmap_write(priv->map, JZ_REG_LCD_OSDC, osdc);
1371
1372 mutex_init(&priv->clk_mutex);
1373 priv->clock_nb.notifier_call = ingenic_drm_update_pixclk;
1374
1375 parent_clk = clk_get_parent(priv->pix_clk);
1376 ret = clk_notifier_register(parent_clk, &priv->clock_nb);
1377 if (ret) {
1378 dev_err(dev, "Unable to register clock notifier\n");
1379 goto err_devclk_disable;
1380 }
1381
1382 private_state = kzalloc(sizeof(*private_state), GFP_KERNEL);
1383 if (!private_state) {
1384 ret = -ENOMEM;
1385 goto err_clk_notifier_unregister;
1386 }
1387
1388 drm_atomic_private_obj_init(drm, &priv->private_obj, &private_state->base,
1389 &ingenic_drm_private_state_funcs);
1390
1391 ret = drmm_add_action_or_reset(drm, ingenic_drm_atomic_private_obj_fini,
1392 &priv->private_obj);
1393 if (ret)
1394 goto err_private_state_free;
1395
1396 ret = drm_dev_register(drm, 0);
1397 if (ret) {
1398 dev_err(dev, "Failed to register DRM driver\n");
1399 goto err_clk_notifier_unregister;
1400 }
1401
1402 drm_fbdev_generic_setup(drm, 32);
1403
1404 return 0;
1405
1406err_private_state_free:
1407 kfree(private_state);
1408err_clk_notifier_unregister:
1409 clk_notifier_unregister(parent_clk, &priv->clock_nb);
1410err_devclk_disable:
1411 if (priv->lcd_clk)
1412 clk_disable_unprepare(priv->lcd_clk);
1413err_pixclk_disable:
1414 clk_disable_unprepare(priv->pix_clk);
1415err_drvdata:
1416 platform_set_drvdata(pdev, NULL);
1417 return ret;
1418}
1419
1420static int ingenic_drm_bind_with_components(struct device *dev)
1421{
1422 return ingenic_drm_bind(dev, true);
1423}
1424
1425static void ingenic_drm_unbind(struct device *dev)
1426{
1427 struct ingenic_drm *priv = dev_get_drvdata(dev);
1428 struct clk *parent_clk = clk_get_parent(priv->pix_clk);
1429
1430 clk_notifier_unregister(parent_clk, &priv->clock_nb);
1431 if (priv->lcd_clk)
1432 clk_disable_unprepare(priv->lcd_clk);
1433 clk_disable_unprepare(priv->pix_clk);
1434
1435 drm_dev_unregister(&priv->drm);
1436 drm_atomic_helper_shutdown(&priv->drm);
1437 dev_set_drvdata(dev, NULL);
1438}
1439
1440static const struct component_master_ops ingenic_master_ops = {
1441 .bind = ingenic_drm_bind_with_components,
1442 .unbind = ingenic_drm_unbind,
1443};
1444
1445static int ingenic_drm_probe(struct platform_device *pdev)
1446{
1447 struct device *dev = &pdev->dev;
1448 struct component_match *match = NULL;
1449 struct device_node *np;
1450
1451 if (!IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
1452 return ingenic_drm_bind(dev, false);
1453
1454 /* IPU is at port address 8 */
1455 np = of_graph_get_remote_node(dev->of_node, 8, 0);
1456 if (!np)
1457 return ingenic_drm_bind(dev, false);
1458
1459 drm_of_component_match_add(dev, &match, component_compare_of, np);
1460 of_node_put(np);
1461
1462 return component_master_add_with_match(dev, &ingenic_master_ops, match);
1463}
1464
1465static void ingenic_drm_remove(struct platform_device *pdev)
1466{
1467 struct device *dev = &pdev->dev;
1468
1469 if (!IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
1470 ingenic_drm_unbind(dev);
1471 else
1472 component_master_del(dev, &ingenic_master_ops);
1473}
1474
1475static void ingenic_drm_shutdown(struct platform_device *pdev)
1476{
1477 struct ingenic_drm *priv = platform_get_drvdata(pdev);
1478
1479 if (priv)
1480 drm_atomic_helper_shutdown(&priv->drm);
1481}
1482
1483static int ingenic_drm_suspend(struct device *dev)
1484{
1485 struct ingenic_drm *priv = dev_get_drvdata(dev);
1486
1487 return drm_mode_config_helper_suspend(&priv->drm);
1488}
1489
1490static int ingenic_drm_resume(struct device *dev)
1491{
1492 struct ingenic_drm *priv = dev_get_drvdata(dev);
1493
1494 return drm_mode_config_helper_resume(&priv->drm);
1495}
1496
1497static DEFINE_SIMPLE_DEV_PM_OPS(ingenic_drm_pm_ops,
1498 ingenic_drm_suspend, ingenic_drm_resume);
1499
1500static const u32 jz4740_formats[] = {
1501 DRM_FORMAT_XRGB1555,
1502 DRM_FORMAT_RGB565,
1503 DRM_FORMAT_XRGB8888,
1504};
1505
1506static const u32 jz4725b_formats_f1[] = {
1507 DRM_FORMAT_XRGB1555,
1508 DRM_FORMAT_RGB565,
1509 DRM_FORMAT_XRGB8888,
1510};
1511
1512static const u32 jz4725b_formats_f0[] = {
1513 DRM_FORMAT_C8,
1514 DRM_FORMAT_XRGB1555,
1515 DRM_FORMAT_RGB565,
1516 DRM_FORMAT_XRGB8888,
1517};
1518
1519static const u32 jz4770_formats_f1[] = {
1520 DRM_FORMAT_XRGB1555,
1521 DRM_FORMAT_RGB565,
1522 DRM_FORMAT_RGB888,
1523 DRM_FORMAT_XRGB8888,
1524 DRM_FORMAT_XRGB2101010,
1525};
1526
1527static const u32 jz4770_formats_f0[] = {
1528 DRM_FORMAT_C8,
1529 DRM_FORMAT_XRGB1555,
1530 DRM_FORMAT_RGB565,
1531 DRM_FORMAT_RGB888,
1532 DRM_FORMAT_XRGB8888,
1533 DRM_FORMAT_XRGB2101010,
1534};
1535
1536static const struct jz_soc_info jz4740_soc_info = {
1537 .needs_dev_clk = true,
1538 .has_osd = false,
1539 .map_noncoherent = false,
1540 .max_width = 800,
1541 .max_height = 600,
1542 .max_burst = JZ_LCD_CTRL_BURST_16,
1543 .formats_f1 = jz4740_formats,
1544 .num_formats_f1 = ARRAY_SIZE(jz4740_formats),
1545 /* JZ4740 has only one plane */
1546};
1547
1548static const struct jz_soc_info jz4725b_soc_info = {
1549 .needs_dev_clk = false,
1550 .has_osd = true,
1551 .map_noncoherent = false,
1552 .max_width = 800,
1553 .max_height = 600,
1554 .max_burst = JZ_LCD_CTRL_BURST_16,
1555 .formats_f1 = jz4725b_formats_f1,
1556 .num_formats_f1 = ARRAY_SIZE(jz4725b_formats_f1),
1557 .formats_f0 = jz4725b_formats_f0,
1558 .num_formats_f0 = ARRAY_SIZE(jz4725b_formats_f0),
1559};
1560
1561static const struct jz_soc_info jz4760_soc_info = {
1562 .needs_dev_clk = false,
1563 .has_osd = true,
1564 .map_noncoherent = false,
1565 .max_width = 1280,
1566 .max_height = 720,
1567 .max_burst = JZ_LCD_CTRL_BURST_32,
1568 .formats_f1 = jz4770_formats_f1,
1569 .num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1570 .formats_f0 = jz4770_formats_f0,
1571 .num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1572};
1573
1574static const struct jz_soc_info jz4760b_soc_info = {
1575 .needs_dev_clk = false,
1576 .has_osd = true,
1577 .map_noncoherent = false,
1578 .max_width = 1280,
1579 .max_height = 720,
1580 .max_burst = JZ_LCD_CTRL_BURST_64,
1581 .formats_f1 = jz4770_formats_f1,
1582 .num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1583 .formats_f0 = jz4770_formats_f0,
1584 .num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1585};
1586
1587static const struct jz_soc_info jz4770_soc_info = {
1588 .needs_dev_clk = false,
1589 .has_osd = true,
1590 .map_noncoherent = true,
1591 .max_width = 1280,
1592 .max_height = 720,
1593 .max_burst = JZ_LCD_CTRL_BURST_64,
1594 .formats_f1 = jz4770_formats_f1,
1595 .num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1596 .formats_f0 = jz4770_formats_f0,
1597 .num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1598};
1599
1600static const struct jz_soc_info jz4780_soc_info = {
1601 .needs_dev_clk = true,
1602 .has_osd = true,
1603 .has_alpha = true,
1604 .use_extended_hwdesc = true,
1605 .plane_f0_not_working = true, /* REVISIT */
1606 .max_width = 4096,
1607 .max_height = 2048,
1608 .max_burst = JZ_LCD_CTRL_BURST_64,
1609 .formats_f1 = jz4770_formats_f1,
1610 .num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1611 .formats_f0 = jz4770_formats_f0,
1612 .num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1613};
1614
1615static const struct of_device_id ingenic_drm_of_match[] = {
1616 { .compatible = "ingenic,jz4740-lcd", .data = &jz4740_soc_info },
1617 { .compatible = "ingenic,jz4725b-lcd", .data = &jz4725b_soc_info },
1618 { .compatible = "ingenic,jz4760-lcd", .data = &jz4760_soc_info },
1619 { .compatible = "ingenic,jz4760b-lcd", .data = &jz4760b_soc_info },
1620 { .compatible = "ingenic,jz4770-lcd", .data = &jz4770_soc_info },
1621 { .compatible = "ingenic,jz4780-lcd", .data = &jz4780_soc_info },
1622 { /* sentinel */ },
1623};
1624MODULE_DEVICE_TABLE(of, ingenic_drm_of_match);
1625
1626static struct platform_driver ingenic_drm_driver = {
1627 .driver = {
1628 .name = "ingenic-drm",
1629 .pm = pm_sleep_ptr(&ingenic_drm_pm_ops),
1630 .of_match_table = of_match_ptr(ingenic_drm_of_match),
1631 },
1632 .probe = ingenic_drm_probe,
1633 .remove_new = ingenic_drm_remove,
1634 .shutdown = ingenic_drm_shutdown,
1635};
1636
1637static int ingenic_drm_init(void)
1638{
1639 int err;
1640
1641 if (drm_firmware_drivers_only())
1642 return -ENODEV;
1643
1644 if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU)) {
1645 err = platform_driver_register(ingenic_ipu_driver_ptr);
1646 if (err)
1647 return err;
1648 }
1649
1650 err = platform_driver_register(&ingenic_drm_driver);
1651 if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && err)
1652 platform_driver_unregister(ingenic_ipu_driver_ptr);
1653
1654 return err;
1655}
1656module_init(ingenic_drm_init);
1657
1658static void ingenic_drm_exit(void)
1659{
1660 platform_driver_unregister(&ingenic_drm_driver);
1661
1662 if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
1663 platform_driver_unregister(ingenic_ipu_driver_ptr);
1664}
1665module_exit(ingenic_drm_exit);
1666
1667MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
1668MODULE_DESCRIPTION("DRM driver for the Ingenic SoCs\n");
1669MODULE_LICENSE("GPL");