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14#include <linux/backlight.h>
15#include <linux/clk.h>
16
17#include <drm/drmP.h>
18#include <drm/drm_crtc.h>
19#include <drm/drm_crtc_helper.h>
20#include <drm/drm_fb_cma_helper.h>
21#include <drm/drm_gem_cma_helper.h>
22#include <drm/drm_plane_helper.h>
23
24#include "shmob_drm_backlight.h"
25#include "shmob_drm_crtc.h"
26#include "shmob_drm_drv.h"
27#include "shmob_drm_kms.h"
28#include "shmob_drm_plane.h"
29#include "shmob_drm_regs.h"
30
31
32
33
34
35
36
37
38
39static int shmob_drm_clk_on(struct shmob_drm_device *sdev)
40{
41 int ret;
42
43 if (sdev->clock) {
44 ret = clk_prepare_enable(sdev->clock);
45 if (ret < 0)
46 return ret;
47 }
48
49 return 0;
50}
51
52static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
53{
54 if (sdev->clock)
55 clk_disable_unprepare(sdev->clock);
56}
57
58
59
60
61
62static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
63{
64 struct drm_crtc *crtc = &scrtc->crtc;
65 struct shmob_drm_device *sdev = crtc->dev->dev_private;
66 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
67 const struct drm_display_mode *mode = &crtc->mode;
68 u32 value;
69
70 value = sdev->ldmt1r
71 | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
72 | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
73 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
74 | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
75 | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
76 | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
77 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
78 lcdc_write(sdev, LDMT1R, value);
79
80 if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
81 idata->interface <= SHMOB_DRM_IFACE_SYS24) {
82
83 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
84 | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
85 | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
86 | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
87 | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
88 | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
89 lcdc_write(sdev, LDMT2R, value);
90
91 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
92 | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
93 | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
94 | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
95 lcdc_write(sdev, LDMT3R, value);
96 }
97
98 value = ((mode->hdisplay / 8) << 16)
99 | (mode->htotal / 8);
100 lcdc_write(sdev, LDHCNR, value);
101
102 value = (((mode->hsync_end - mode->hsync_start) / 8) << 16)
103 | (mode->hsync_start / 8);
104 lcdc_write(sdev, LDHSYNR, value);
105
106 value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
107 | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
108 | (mode->hsync_start & 7);
109 lcdc_write(sdev, LDHAJR, value);
110
111 value = ((mode->vdisplay) << 16)
112 | mode->vtotal;
113 lcdc_write(sdev, LDVLNR, value);
114
115 value = ((mode->vsync_end - mode->vsync_start) << 16)
116 | mode->vsync_start;
117 lcdc_write(sdev, LDVSYNR, value);
118}
119
120static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
121{
122 struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
123 u32 value;
124
125 value = lcdc_read(sdev, LDCNT2R);
126 if (start)
127 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
128 else
129 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
130
131
132 while (1) {
133 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
134 if ((start && value) || (!start && !value))
135 break;
136
137 cpu_relax();
138 }
139
140 if (!start) {
141
142 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
143 }
144}
145
146
147
148
149
150
151
152
153static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
154{
155 struct drm_crtc *crtc = &scrtc->crtc;
156 struct shmob_drm_device *sdev = crtc->dev->dev_private;
157 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
158 const struct shmob_drm_format_info *format;
159 struct drm_device *dev = sdev->ddev;
160 struct drm_plane *plane;
161 u32 value;
162 int ret;
163
164 if (scrtc->started)
165 return;
166
167 format = shmob_drm_format_info(crtc->primary->fb->format->format);
168 if (WARN_ON(format == NULL))
169 return;
170
171
172 ret = shmob_drm_clk_on(sdev);
173 if (ret < 0)
174 return;
175
176
177 lcdc_write(sdev, LDCNT2R, lcdc_read(sdev, LDCNT2R) | LDCNT2R_BR);
178 lcdc_wait_bit(sdev, LDCNT2R, LDCNT2R_BR, 0);
179 lcdc_write(sdev, LDCNT2R, LDCNT2R_ME);
180
181
182 shmob_drm_crtc_start_stop(scrtc, false);
183 lcdc_write(sdev, LDINTR, 0);
184
185
186 lcdc_write(sdev, LDPMR, 0);
187
188 value = sdev->lddckr;
189 if (idata->clk_div) {
190
191
192
193 lcdc_write(sdev, LDDCKPAT1R, 0);
194 lcdc_write(sdev, LDDCKPAT2R, (1 << (idata->clk_div / 2)) - 1);
195
196 if (idata->clk_div == 1)
197 value |= LDDCKR_MOSEL;
198 else
199 value |= idata->clk_div;
200 }
201
202 lcdc_write(sdev, LDDCKR, value);
203 lcdc_write(sdev, LDDCKSTPR, 0);
204 lcdc_wait_bit(sdev, LDDCKSTPR, ~0, 0);
205
206
207
208
209 shmob_drm_crtc_setup_geometry(scrtc);
210
211
212 lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
213 lcdc_write(sdev, LDMLSR, scrtc->line_size);
214 lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
215 if (format->yuv)
216 lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
217 lcdc_write(sdev, LDSM1R, 0);
218
219
220 switch (format->fourcc) {
221 case DRM_FORMAT_RGB565:
222 case DRM_FORMAT_NV21:
223 case DRM_FORMAT_NV61:
224 case DRM_FORMAT_NV42:
225 value = LDDDSR_LS | LDDDSR_WS;
226 break;
227 case DRM_FORMAT_RGB888:
228 case DRM_FORMAT_NV12:
229 case DRM_FORMAT_NV16:
230 case DRM_FORMAT_NV24:
231 value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
232 break;
233 case DRM_FORMAT_ARGB8888:
234 default:
235 value = LDDDSR_LS;
236 break;
237 }
238 lcdc_write(sdev, LDDDSR, value);
239
240
241 drm_for_each_legacy_plane(plane, dev) {
242 if (plane->crtc == crtc)
243 shmob_drm_plane_setup(plane);
244 }
245
246
247 lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
248
249 shmob_drm_crtc_start_stop(scrtc, true);
250
251 scrtc->started = true;
252}
253
254static void shmob_drm_crtc_stop(struct shmob_drm_crtc *scrtc)
255{
256 struct drm_crtc *crtc = &scrtc->crtc;
257 struct shmob_drm_device *sdev = crtc->dev->dev_private;
258
259 if (!scrtc->started)
260 return;
261
262
263 shmob_drm_crtc_start_stop(scrtc, false);
264
265
266 lcdc_write(sdev, LDCNT1R, 0);
267
268
269 shmob_drm_clk_off(sdev);
270
271 scrtc->started = false;
272}
273
274void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
275{
276 shmob_drm_crtc_stop(scrtc);
277}
278
279void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
280{
281 if (scrtc->dpms != DRM_MODE_DPMS_ON)
282 return;
283
284 shmob_drm_crtc_start(scrtc);
285}
286
287static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
288 int x, int y)
289{
290 struct drm_crtc *crtc = &scrtc->crtc;
291 struct drm_framebuffer *fb = crtc->primary->fb;
292 struct drm_gem_cma_object *gem;
293 unsigned int bpp;
294
295 bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
296 gem = drm_fb_cma_get_gem_obj(fb, 0);
297 scrtc->dma[0] = gem->paddr + fb->offsets[0]
298 + y * fb->pitches[0] + x * bpp / 8;
299
300 if (scrtc->format->yuv) {
301 bpp = scrtc->format->bpp - 8;
302 gem = drm_fb_cma_get_gem_obj(fb, 1);
303 scrtc->dma[1] = gem->paddr + fb->offsets[1]
304 + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
305 + x * (bpp == 16 ? 2 : 1);
306 }
307}
308
309static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
310{
311 struct drm_crtc *crtc = &scrtc->crtc;
312 struct shmob_drm_device *sdev = crtc->dev->dev_private;
313
314 shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
315
316 lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
317 if (scrtc->format->yuv)
318 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
319
320 lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
321}
322
323#define to_shmob_crtc(c) container_of(c, struct shmob_drm_crtc, crtc)
324
325static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
326{
327 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
328
329 if (scrtc->dpms == mode)
330 return;
331
332 if (mode == DRM_MODE_DPMS_ON)
333 shmob_drm_crtc_start(scrtc);
334 else
335 shmob_drm_crtc_stop(scrtc);
336
337 scrtc->dpms = mode;
338}
339
340static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
341{
342 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
343}
344
345static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
346 struct drm_display_mode *mode,
347 struct drm_display_mode *adjusted_mode,
348 int x, int y,
349 struct drm_framebuffer *old_fb)
350{
351 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
352 struct shmob_drm_device *sdev = crtc->dev->dev_private;
353 const struct shmob_drm_format_info *format;
354
355 format = shmob_drm_format_info(crtc->primary->fb->format->format);
356 if (format == NULL) {
357 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
358 crtc->primary->fb->format->format);
359 return -EINVAL;
360 }
361
362 scrtc->format = format;
363 scrtc->line_size = crtc->primary->fb->pitches[0];
364
365 shmob_drm_crtc_compute_base(scrtc, x, y);
366
367 return 0;
368}
369
370static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
371{
372 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
373}
374
375static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
376 struct drm_framebuffer *old_fb)
377{
378 shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
379
380 return 0;
381}
382
383static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
384 .dpms = shmob_drm_crtc_dpms,
385 .prepare = shmob_drm_crtc_mode_prepare,
386 .commit = shmob_drm_crtc_mode_commit,
387 .mode_set = shmob_drm_crtc_mode_set,
388 .mode_set_base = shmob_drm_crtc_mode_set_base,
389};
390
391void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
392{
393 struct drm_pending_vblank_event *event;
394 struct drm_device *dev = scrtc->crtc.dev;
395 unsigned long flags;
396
397 spin_lock_irqsave(&dev->event_lock, flags);
398 event = scrtc->event;
399 scrtc->event = NULL;
400 if (event) {
401 drm_crtc_send_vblank_event(&scrtc->crtc, event);
402 drm_crtc_vblank_put(&scrtc->crtc);
403 }
404 spin_unlock_irqrestore(&dev->event_lock, flags);
405}
406
407static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
408 struct drm_framebuffer *fb,
409 struct drm_pending_vblank_event *event,
410 uint32_t page_flip_flags,
411 struct drm_modeset_acquire_ctx *ctx)
412{
413 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
414 struct drm_device *dev = scrtc->crtc.dev;
415 unsigned long flags;
416
417 spin_lock_irqsave(&dev->event_lock, flags);
418 if (scrtc->event != NULL) {
419 spin_unlock_irqrestore(&dev->event_lock, flags);
420 return -EBUSY;
421 }
422 spin_unlock_irqrestore(&dev->event_lock, flags);
423
424 crtc->primary->fb = fb;
425 shmob_drm_crtc_update_base(scrtc);
426
427 if (event) {
428 event->pipe = 0;
429 drm_crtc_vblank_get(&scrtc->crtc);
430 spin_lock_irqsave(&dev->event_lock, flags);
431 scrtc->event = event;
432 spin_unlock_irqrestore(&dev->event_lock, flags);
433 }
434
435 return 0;
436}
437
438static void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev,
439 bool enable)
440{
441 unsigned long flags;
442 u32 ldintr;
443
444
445 spin_lock_irqsave(&sdev->irq_lock, flags);
446 ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
447 if (enable)
448 ldintr |= LDINTR_VEE;
449 else
450 ldintr &= ~LDINTR_VEE;
451 lcdc_write(sdev, LDINTR, ldintr);
452 spin_unlock_irqrestore(&sdev->irq_lock, flags);
453}
454
455static int shmob_drm_enable_vblank(struct drm_crtc *crtc)
456{
457 struct shmob_drm_device *sdev = crtc->dev->dev_private;
458
459 shmob_drm_crtc_enable_vblank(sdev, true);
460
461 return 0;
462}
463
464static void shmob_drm_disable_vblank(struct drm_crtc *crtc)
465{
466 struct shmob_drm_device *sdev = crtc->dev->dev_private;
467
468 shmob_drm_crtc_enable_vblank(sdev, false);
469}
470
471static const struct drm_crtc_funcs crtc_funcs = {
472 .destroy = drm_crtc_cleanup,
473 .set_config = drm_crtc_helper_set_config,
474 .page_flip = shmob_drm_crtc_page_flip,
475 .enable_vblank = shmob_drm_enable_vblank,
476 .disable_vblank = shmob_drm_disable_vblank,
477};
478
479int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
480{
481 struct drm_crtc *crtc = &sdev->crtc.crtc;
482 int ret;
483
484 sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
485
486 ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
487 if (ret < 0)
488 return ret;
489
490 drm_crtc_helper_add(crtc, &crtc_helper_funcs);
491
492 return 0;
493}
494
495
496
497
498
499#define to_shmob_encoder(e) \
500 container_of(e, struct shmob_drm_encoder, encoder)
501
502static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
503{
504 struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
505 struct shmob_drm_device *sdev = encoder->dev->dev_private;
506 struct shmob_drm_connector *scon = &sdev->connector;
507
508 if (senc->dpms == mode)
509 return;
510
511 shmob_drm_backlight_dpms(scon, mode);
512
513 senc->dpms = mode;
514}
515
516static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
517 const struct drm_display_mode *mode,
518 struct drm_display_mode *adjusted_mode)
519{
520 struct drm_device *dev = encoder->dev;
521 struct shmob_drm_device *sdev = dev->dev_private;
522 struct drm_connector *connector = &sdev->connector.connector;
523 const struct drm_display_mode *panel_mode;
524
525 if (list_empty(&connector->modes)) {
526 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
527 return false;
528 }
529
530
531 panel_mode = list_first_entry(&connector->modes,
532 struct drm_display_mode, head);
533 drm_mode_copy(adjusted_mode, panel_mode);
534
535 return true;
536}
537
538static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
539{
540
541}
542
543static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
544 struct drm_display_mode *mode,
545 struct drm_display_mode *adjusted_mode)
546{
547
548}
549
550static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
551{
552
553}
554
555static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
556 .dpms = shmob_drm_encoder_dpms,
557 .mode_fixup = shmob_drm_encoder_mode_fixup,
558 .prepare = shmob_drm_encoder_mode_prepare,
559 .commit = shmob_drm_encoder_mode_commit,
560 .mode_set = shmob_drm_encoder_mode_set,
561};
562
563static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
564{
565 drm_encoder_cleanup(encoder);
566}
567
568static const struct drm_encoder_funcs encoder_funcs = {
569 .destroy = shmob_drm_encoder_destroy,
570};
571
572int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
573{
574 struct drm_encoder *encoder = &sdev->encoder.encoder;
575 int ret;
576
577 sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
578
579 encoder->possible_crtcs = 1;
580
581 ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
582 DRM_MODE_ENCODER_LVDS, NULL);
583 if (ret < 0)
584 return ret;
585
586 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
587
588 return 0;
589}
590
591
592
593
594
595#define to_shmob_connector(c) \
596 container_of(c, struct shmob_drm_connector, connector)
597
598static int shmob_drm_connector_get_modes(struct drm_connector *connector)
599{
600 struct shmob_drm_device *sdev = connector->dev->dev_private;
601 struct drm_display_mode *mode;
602
603 mode = drm_mode_create(connector->dev);
604 if (mode == NULL)
605 return 0;
606
607 mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
608 mode->clock = sdev->pdata->panel.mode.clock;
609 mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
610 mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
611 mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
612 mode->htotal = sdev->pdata->panel.mode.htotal;
613 mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
614 mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
615 mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
616 mode->vtotal = sdev->pdata->panel.mode.vtotal;
617 mode->flags = sdev->pdata->panel.mode.flags;
618
619 drm_mode_set_name(mode);
620 drm_mode_probed_add(connector, mode);
621
622 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
623 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
624
625 return 1;
626}
627
628static struct drm_encoder *
629shmob_drm_connector_best_encoder(struct drm_connector *connector)
630{
631 struct shmob_drm_connector *scon = to_shmob_connector(connector);
632
633 return scon->encoder;
634}
635
636static const struct drm_connector_helper_funcs connector_helper_funcs = {
637 .get_modes = shmob_drm_connector_get_modes,
638 .best_encoder = shmob_drm_connector_best_encoder,
639};
640
641static void shmob_drm_connector_destroy(struct drm_connector *connector)
642{
643 struct shmob_drm_connector *scon = to_shmob_connector(connector);
644
645 shmob_drm_backlight_exit(scon);
646 drm_connector_unregister(connector);
647 drm_connector_cleanup(connector);
648}
649
650static const struct drm_connector_funcs connector_funcs = {
651 .dpms = drm_helper_connector_dpms,
652 .fill_modes = drm_helper_probe_single_connector_modes,
653 .destroy = shmob_drm_connector_destroy,
654};
655
656int shmob_drm_connector_create(struct shmob_drm_device *sdev,
657 struct drm_encoder *encoder)
658{
659 struct drm_connector *connector = &sdev->connector.connector;
660 int ret;
661
662 sdev->connector.encoder = encoder;
663
664 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
665 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
666
667 ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
668 DRM_MODE_CONNECTOR_LVDS);
669 if (ret < 0)
670 return ret;
671
672 drm_connector_helper_add(connector, &connector_helper_funcs);
673
674 ret = shmob_drm_backlight_init(&sdev->connector);
675 if (ret < 0)
676 goto err_cleanup;
677
678 ret = drm_mode_connector_attach_encoder(connector, encoder);
679 if (ret < 0)
680 goto err_backlight;
681
682 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
683 drm_object_property_set_value(&connector->base,
684 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
685
686 return 0;
687
688err_backlight:
689 shmob_drm_backlight_exit(&sdev->connector);
690err_cleanup:
691 drm_connector_cleanup(connector);
692 return ret;
693}
694
