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10#include <linux/backlight.h>
11#include <linux/clk.h>
12
13#include <drm/drm_crtc.h>
14#include <drm/drm_crtc_helper.h>
15#include <drm/drm_fb_cma_helper.h>
16#include <drm/drm_fourcc.h>
17#include <drm/drm_gem_cma_helper.h>
18#include <drm/drm_plane_helper.h>
19#include <drm/drm_probe_helper.h>
20#include <drm/drm_simple_kms_helper.h>
21#include <drm/drm_vblank.h>
22
23#include "shmob_drm_backlight.h"
24#include "shmob_drm_crtc.h"
25#include "shmob_drm_drv.h"
26#include "shmob_drm_kms.h"
27#include "shmob_drm_plane.h"
28#include "shmob_drm_regs.h"
29
30
31
32
33
34
35
36
37
38static int shmob_drm_clk_on(struct shmob_drm_device *sdev)
39{
40 int ret;
41
42 if (sdev->clock) {
43 ret = clk_prepare_enable(sdev->clock);
44 if (ret < 0)
45 return ret;
46 }
47
48 return 0;
49}
50
51static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
52{
53 if (sdev->clock)
54 clk_disable_unprepare(sdev->clock);
55}
56
57
58
59
60
61static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
62{
63 struct drm_crtc *crtc = &scrtc->crtc;
64 struct shmob_drm_device *sdev = crtc->dev->dev_private;
65 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
66 const struct drm_display_mode *mode = &crtc->mode;
67 u32 value;
68
69 value = sdev->ldmt1r
70 | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
71 | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
72 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
73 | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
74 | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
75 | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
76 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
77 lcdc_write(sdev, LDMT1R, value);
78
79 if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
80 idata->interface <= SHMOB_DRM_IFACE_SYS24) {
81
82 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
83 | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
84 | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
85 | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
86 | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
87 | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
88 lcdc_write(sdev, LDMT2R, value);
89
90 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
91 | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
92 | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
93 | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
94 lcdc_write(sdev, LDMT3R, value);
95 }
96
97 value = ((mode->hdisplay / 8) << 16)
98 | (mode->htotal / 8);
99 lcdc_write(sdev, LDHCNR, value);
100
101 value = (((mode->hsync_end - mode->hsync_start) / 8) << 16)
102 | (mode->hsync_start / 8);
103 lcdc_write(sdev, LDHSYNR, value);
104
105 value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
106 | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
107 | (mode->hsync_start & 7);
108 lcdc_write(sdev, LDHAJR, value);
109
110 value = ((mode->vdisplay) << 16)
111 | mode->vtotal;
112 lcdc_write(sdev, LDVLNR, value);
113
114 value = ((mode->vsync_end - mode->vsync_start) << 16)
115 | mode->vsync_start;
116 lcdc_write(sdev, LDVSYNR, value);
117}
118
119static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
120{
121 struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
122 u32 value;
123
124 value = lcdc_read(sdev, LDCNT2R);
125 if (start)
126 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
127 else
128 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
129
130
131 while (1) {
132 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
133 if ((start && value) || (!start && !value))
134 break;
135
136 cpu_relax();
137 }
138
139 if (!start) {
140
141 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
142 }
143}
144
145
146
147
148
149
150
151
152static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
153{
154 struct drm_crtc *crtc = &scrtc->crtc;
155 struct shmob_drm_device *sdev = crtc->dev->dev_private;
156 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
157 const struct shmob_drm_format_info *format;
158 struct drm_device *dev = sdev->ddev;
159 struct drm_plane *plane;
160 u32 value;
161 int ret;
162
163 if (scrtc->started)
164 return;
165
166 format = shmob_drm_format_info(crtc->primary->fb->format->format);
167 if (WARN_ON(format == NULL))
168 return;
169
170
171 ret = shmob_drm_clk_on(sdev);
172 if (ret < 0)
173 return;
174
175
176 lcdc_write(sdev, LDCNT2R, lcdc_read(sdev, LDCNT2R) | LDCNT2R_BR);
177 lcdc_wait_bit(sdev, LDCNT2R, LDCNT2R_BR, 0);
178 lcdc_write(sdev, LDCNT2R, LDCNT2R_ME);
179
180
181 shmob_drm_crtc_start_stop(scrtc, false);
182 lcdc_write(sdev, LDINTR, 0);
183
184
185 lcdc_write(sdev, LDPMR, 0);
186
187 value = sdev->lddckr;
188 if (idata->clk_div) {
189
190
191
192 lcdc_write(sdev, LDDCKPAT1R, 0);
193 lcdc_write(sdev, LDDCKPAT2R, (1 << (idata->clk_div / 2)) - 1);
194
195 if (idata->clk_div == 1)
196 value |= LDDCKR_MOSEL;
197 else
198 value |= idata->clk_div;
199 }
200
201 lcdc_write(sdev, LDDCKR, value);
202 lcdc_write(sdev, LDDCKSTPR, 0);
203 lcdc_wait_bit(sdev, LDDCKSTPR, ~0, 0);
204
205
206
207
208 shmob_drm_crtc_setup_geometry(scrtc);
209
210
211 lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
212 lcdc_write(sdev, LDMLSR, scrtc->line_size);
213 lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
214 if (format->yuv)
215 lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
216 lcdc_write(sdev, LDSM1R, 0);
217
218
219 switch (format->fourcc) {
220 case DRM_FORMAT_RGB565:
221 case DRM_FORMAT_NV21:
222 case DRM_FORMAT_NV61:
223 case DRM_FORMAT_NV42:
224 value = LDDDSR_LS | LDDDSR_WS;
225 break;
226 case DRM_FORMAT_RGB888:
227 case DRM_FORMAT_NV12:
228 case DRM_FORMAT_NV16:
229 case DRM_FORMAT_NV24:
230 value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
231 break;
232 case DRM_FORMAT_ARGB8888:
233 default:
234 value = LDDDSR_LS;
235 break;
236 }
237 lcdc_write(sdev, LDDDSR, value);
238
239
240 drm_for_each_legacy_plane(plane, dev) {
241 if (plane->crtc == crtc)
242 shmob_drm_plane_setup(plane);
243 }
244
245
246 lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
247
248 shmob_drm_crtc_start_stop(scrtc, true);
249
250 scrtc->started = true;
251}
252
253static void shmob_drm_crtc_stop(struct shmob_drm_crtc *scrtc)
254{
255 struct drm_crtc *crtc = &scrtc->crtc;
256 struct shmob_drm_device *sdev = crtc->dev->dev_private;
257
258 if (!scrtc->started)
259 return;
260
261
262 shmob_drm_crtc_start_stop(scrtc, false);
263
264
265 lcdc_write(sdev, LDCNT1R, 0);
266
267
268 shmob_drm_clk_off(sdev);
269
270 scrtc->started = false;
271}
272
273void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
274{
275 shmob_drm_crtc_stop(scrtc);
276}
277
278void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
279{
280 if (scrtc->dpms != DRM_MODE_DPMS_ON)
281 return;
282
283 shmob_drm_crtc_start(scrtc);
284}
285
286static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
287 int x, int y)
288{
289 struct drm_crtc *crtc = &scrtc->crtc;
290 struct drm_framebuffer *fb = crtc->primary->fb;
291 struct drm_gem_cma_object *gem;
292 unsigned int bpp;
293
294 bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
295 gem = drm_fb_cma_get_gem_obj(fb, 0);
296 scrtc->dma[0] = gem->paddr + fb->offsets[0]
297 + y * fb->pitches[0] + x * bpp / 8;
298
299 if (scrtc->format->yuv) {
300 bpp = scrtc->format->bpp - 8;
301 gem = drm_fb_cma_get_gem_obj(fb, 1);
302 scrtc->dma[1] = gem->paddr + fb->offsets[1]
303 + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
304 + x * (bpp == 16 ? 2 : 1);
305 }
306}
307
308static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
309{
310 struct drm_crtc *crtc = &scrtc->crtc;
311 struct shmob_drm_device *sdev = crtc->dev->dev_private;
312
313 shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
314
315 lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
316 if (scrtc->format->yuv)
317 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
318
319 lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
320}
321
322#define to_shmob_crtc(c) container_of(c, struct shmob_drm_crtc, crtc)
323
324static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
325{
326 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
327
328 if (scrtc->dpms == mode)
329 return;
330
331 if (mode == DRM_MODE_DPMS_ON)
332 shmob_drm_crtc_start(scrtc);
333 else
334 shmob_drm_crtc_stop(scrtc);
335
336 scrtc->dpms = mode;
337}
338
339static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
340{
341 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
342}
343
344static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
345 struct drm_display_mode *mode,
346 struct drm_display_mode *adjusted_mode,
347 int x, int y,
348 struct drm_framebuffer *old_fb)
349{
350 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
351 struct shmob_drm_device *sdev = crtc->dev->dev_private;
352 const struct shmob_drm_format_info *format;
353
354 format = shmob_drm_format_info(crtc->primary->fb->format->format);
355 if (format == NULL) {
356 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
357 crtc->primary->fb->format->format);
358 return -EINVAL;
359 }
360
361 scrtc->format = format;
362 scrtc->line_size = crtc->primary->fb->pitches[0];
363
364 shmob_drm_crtc_compute_base(scrtc, x, y);
365
366 return 0;
367}
368
369static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
370{
371 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
372}
373
374static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
375 struct drm_framebuffer *old_fb)
376{
377 shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
378
379 return 0;
380}
381
382static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
383 .dpms = shmob_drm_crtc_dpms,
384 .prepare = shmob_drm_crtc_mode_prepare,
385 .commit = shmob_drm_crtc_mode_commit,
386 .mode_set = shmob_drm_crtc_mode_set,
387 .mode_set_base = shmob_drm_crtc_mode_set_base,
388};
389
390void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
391{
392 struct drm_pending_vblank_event *event;
393 struct drm_device *dev = scrtc->crtc.dev;
394 unsigned long flags;
395
396 spin_lock_irqsave(&dev->event_lock, flags);
397 event = scrtc->event;
398 scrtc->event = NULL;
399 if (event) {
400 drm_crtc_send_vblank_event(&scrtc->crtc, event);
401 drm_crtc_vblank_put(&scrtc->crtc);
402 }
403 spin_unlock_irqrestore(&dev->event_lock, flags);
404}
405
406static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
407 struct drm_framebuffer *fb,
408 struct drm_pending_vblank_event *event,
409 uint32_t page_flip_flags,
410 struct drm_modeset_acquire_ctx *ctx)
411{
412 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
413 struct drm_device *dev = scrtc->crtc.dev;
414 unsigned long flags;
415
416 spin_lock_irqsave(&dev->event_lock, flags);
417 if (scrtc->event != NULL) {
418 spin_unlock_irqrestore(&dev->event_lock, flags);
419 return -EBUSY;
420 }
421 spin_unlock_irqrestore(&dev->event_lock, flags);
422
423 crtc->primary->fb = fb;
424 shmob_drm_crtc_update_base(scrtc);
425
426 if (event) {
427 event->pipe = 0;
428 drm_crtc_vblank_get(&scrtc->crtc);
429 spin_lock_irqsave(&dev->event_lock, flags);
430 scrtc->event = event;
431 spin_unlock_irqrestore(&dev->event_lock, flags);
432 }
433
434 return 0;
435}
436
437static void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev,
438 bool enable)
439{
440 unsigned long flags;
441 u32 ldintr;
442
443
444 spin_lock_irqsave(&sdev->irq_lock, flags);
445 ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
446 if (enable)
447 ldintr |= LDINTR_VEE;
448 else
449 ldintr &= ~LDINTR_VEE;
450 lcdc_write(sdev, LDINTR, ldintr);
451 spin_unlock_irqrestore(&sdev->irq_lock, flags);
452}
453
454static int shmob_drm_enable_vblank(struct drm_crtc *crtc)
455{
456 struct shmob_drm_device *sdev = crtc->dev->dev_private;
457
458 shmob_drm_crtc_enable_vblank(sdev, true);
459
460 return 0;
461}
462
463static void shmob_drm_disable_vblank(struct drm_crtc *crtc)
464{
465 struct shmob_drm_device *sdev = crtc->dev->dev_private;
466
467 shmob_drm_crtc_enable_vblank(sdev, false);
468}
469
470static const struct drm_crtc_funcs crtc_funcs = {
471 .destroy = drm_crtc_cleanup,
472 .set_config = drm_crtc_helper_set_config,
473 .page_flip = shmob_drm_crtc_page_flip,
474 .enable_vblank = shmob_drm_enable_vblank,
475 .disable_vblank = shmob_drm_disable_vblank,
476};
477
478int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
479{
480 struct drm_crtc *crtc = &sdev->crtc.crtc;
481 int ret;
482
483 sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
484
485 ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
486 if (ret < 0)
487 return ret;
488
489 drm_crtc_helper_add(crtc, &crtc_helper_funcs);
490
491 return 0;
492}
493
494
495
496
497
498#define to_shmob_encoder(e) \
499 container_of(e, struct shmob_drm_encoder, encoder)
500
501static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
502{
503 struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
504 struct shmob_drm_device *sdev = encoder->dev->dev_private;
505 struct shmob_drm_connector *scon = &sdev->connector;
506
507 if (senc->dpms == mode)
508 return;
509
510 shmob_drm_backlight_dpms(scon, mode);
511
512 senc->dpms = mode;
513}
514
515static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
516 const struct drm_display_mode *mode,
517 struct drm_display_mode *adjusted_mode)
518{
519 struct drm_device *dev = encoder->dev;
520 struct shmob_drm_device *sdev = dev->dev_private;
521 struct drm_connector *connector = &sdev->connector.connector;
522 const struct drm_display_mode *panel_mode;
523
524 if (list_empty(&connector->modes)) {
525 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
526 return false;
527 }
528
529
530 panel_mode = list_first_entry(&connector->modes,
531 struct drm_display_mode, head);
532 drm_mode_copy(adjusted_mode, panel_mode);
533
534 return true;
535}
536
537static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
538{
539
540}
541
542static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
543 struct drm_display_mode *mode,
544 struct drm_display_mode *adjusted_mode)
545{
546
547}
548
549static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
550{
551
552}
553
554static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
555 .dpms = shmob_drm_encoder_dpms,
556 .mode_fixup = shmob_drm_encoder_mode_fixup,
557 .prepare = shmob_drm_encoder_mode_prepare,
558 .commit = shmob_drm_encoder_mode_commit,
559 .mode_set = shmob_drm_encoder_mode_set,
560};
561
562int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
563{
564 struct drm_encoder *encoder = &sdev->encoder.encoder;
565 int ret;
566
567 sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
568
569 encoder->possible_crtcs = 1;
570
571 ret = drm_simple_encoder_init(sdev->ddev, encoder,
572 DRM_MODE_ENCODER_LVDS);
573 if (ret < 0)
574 return ret;
575
576 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
577
578 return 0;
579}
580
581
582
583
584
585#define to_shmob_connector(c) \
586 container_of(c, struct shmob_drm_connector, connector)
587
588static int shmob_drm_connector_get_modes(struct drm_connector *connector)
589{
590 struct shmob_drm_device *sdev = connector->dev->dev_private;
591 struct drm_display_mode *mode;
592
593 mode = drm_mode_create(connector->dev);
594 if (mode == NULL)
595 return 0;
596
597 mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
598 mode->clock = sdev->pdata->panel.mode.clock;
599 mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
600 mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
601 mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
602 mode->htotal = sdev->pdata->panel.mode.htotal;
603 mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
604 mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
605 mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
606 mode->vtotal = sdev->pdata->panel.mode.vtotal;
607 mode->flags = sdev->pdata->panel.mode.flags;
608
609 drm_mode_set_name(mode);
610 drm_mode_probed_add(connector, mode);
611
612 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
613 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
614
615 return 1;
616}
617
618static struct drm_encoder *
619shmob_drm_connector_best_encoder(struct drm_connector *connector)
620{
621 struct shmob_drm_connector *scon = to_shmob_connector(connector);
622
623 return scon->encoder;
624}
625
626static const struct drm_connector_helper_funcs connector_helper_funcs = {
627 .get_modes = shmob_drm_connector_get_modes,
628 .best_encoder = shmob_drm_connector_best_encoder,
629};
630
631static void shmob_drm_connector_destroy(struct drm_connector *connector)
632{
633 struct shmob_drm_connector *scon = to_shmob_connector(connector);
634
635 shmob_drm_backlight_exit(scon);
636 drm_connector_unregister(connector);
637 drm_connector_cleanup(connector);
638}
639
640static const struct drm_connector_funcs connector_funcs = {
641 .dpms = drm_helper_connector_dpms,
642 .fill_modes = drm_helper_probe_single_connector_modes,
643 .destroy = shmob_drm_connector_destroy,
644};
645
646int shmob_drm_connector_create(struct shmob_drm_device *sdev,
647 struct drm_encoder *encoder)
648{
649 struct drm_connector *connector = &sdev->connector.connector;
650 int ret;
651
652 sdev->connector.encoder = encoder;
653
654 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
655 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
656
657 ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
658 DRM_MODE_CONNECTOR_LVDS);
659 if (ret < 0)
660 return ret;
661
662 drm_connector_helper_add(connector, &connector_helper_funcs);
663
664 ret = shmob_drm_backlight_init(&sdev->connector);
665 if (ret < 0)
666 goto err_cleanup;
667
668 ret = drm_connector_attach_encoder(connector, encoder);
669 if (ret < 0)
670 goto err_backlight;
671
672 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
673 drm_object_property_set_value(&connector->base,
674 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
675
676 return 0;
677
678err_backlight:
679 shmob_drm_backlight_exit(&sdev->connector);
680err_cleanup:
681 drm_connector_cleanup(connector);
682 return ret;
683}
684
