1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * shmob_drm_crtc.c -- SH Mobile DRM CRTCs
4 *
5 * Copyright (C) 2012 Renesas Electronics Corporation
6 *
7 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
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_dma_helper.h>
16 #include <drm/drm_fourcc.h>
17 #include <drm/drm_framebuffer.h>
18 #include <drm/drm_gem_dma_helper.h>
19 #include <drm/drm_modeset_helper.h>
20 #include <drm/drm_modeset_helper_vtables.h>
21 #include <drm/drm_plane_helper.h>
22 #include <drm/drm_probe_helper.h>
23 #include <drm/drm_simple_kms_helper.h>
24 #include <drm/drm_vblank.h>
25
26 #include "shmob_drm_backlight.h"
27 #include "shmob_drm_crtc.h"
28 #include "shmob_drm_drv.h"
29 #include "shmob_drm_kms.h"
30 #include "shmob_drm_plane.h"
31 #include "shmob_drm_regs.h"
32
33 /*
34 * TODO: panel support
35 */
36
37 /* -----------------------------------------------------------------------------
38 * Clock management
39 */
40
shmob_drm_clk_on(struct shmob_drm_device * sdev)41 static int shmob_drm_clk_on(struct shmob_drm_device *sdev)
42 {
43 int ret;
44
45 if (sdev->clock) {
46 ret = clk_prepare_enable(sdev->clock);
47 if (ret < 0)
48 return ret;
49 }
50
51 return 0;
52 }
53
shmob_drm_clk_off(struct shmob_drm_device * sdev)54 static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
55 {
56 if (sdev->clock)
57 clk_disable_unprepare(sdev->clock);
58 }
59
60 /* -----------------------------------------------------------------------------
61 * CRTC
62 */
63
shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc * scrtc)64 static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
65 {
66 struct drm_crtc *crtc = &scrtc->crtc;
67 struct shmob_drm_device *sdev = crtc->dev->dev_private;
68 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
69 const struct drm_display_mode *mode = &crtc->mode;
70 u32 value;
71
72 value = sdev->ldmt1r
73 | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
74 | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
75 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
76 | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
77 | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
78 | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
79 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
80 lcdc_write(sdev, LDMT1R, value);
81
82 if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
83 idata->interface <= SHMOB_DRM_IFACE_SYS24) {
84 /* Setup SYS bus. */
85 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
86 | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
87 | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
88 | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
89 | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
90 | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
91 lcdc_write(sdev, LDMT2R, value);
92
93 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
94 | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
95 | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
96 | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
97 lcdc_write(sdev, LDMT3R, value);
98 }
99
100 value = ((mode->hdisplay / 8) << 16) /* HDCN */
101 | (mode->htotal / 8); /* HTCN */
102 lcdc_write(sdev, LDHCNR, value);
103
104 value = (((mode->hsync_end - mode->hsync_start) / 8) << 16) /* HSYNW */
105 | (mode->hsync_start / 8); /* HSYNP */
106 lcdc_write(sdev, LDHSYNR, value);
107
108 value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
109 | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
110 | (mode->hsync_start & 7);
111 lcdc_write(sdev, LDHAJR, value);
112
113 value = ((mode->vdisplay) << 16) /* VDLN */
114 | mode->vtotal; /* VTLN */
115 lcdc_write(sdev, LDVLNR, value);
116
117 value = ((mode->vsync_end - mode->vsync_start) << 16) /* VSYNW */
118 | mode->vsync_start; /* VSYNP */
119 lcdc_write(sdev, LDVSYNR, value);
120 }
121
shmob_drm_crtc_start_stop(struct shmob_drm_crtc * scrtc,bool start)122 static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
123 {
124 struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
125 u32 value;
126
127 value = lcdc_read(sdev, LDCNT2R);
128 if (start)
129 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
130 else
131 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
132
133 /* Wait until power is applied/stopped. */
134 while (1) {
135 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
136 if ((start && value) || (!start && !value))
137 break;
138
139 cpu_relax();
140 }
141
142 if (!start) {
143 /* Stop the dot clock. */
144 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
145 }
146 }
147
148 /*
149 * shmob_drm_crtc_start - Configure and start the LCDC
150 * @scrtc: the SH Mobile CRTC
151 *
152 * Configure and start the LCDC device. External devices (clocks, MERAM, panels,
153 * ...) are not touched by this function.
154 */
shmob_drm_crtc_start(struct shmob_drm_crtc * scrtc)155 static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
156 {
157 struct drm_crtc *crtc = &scrtc->crtc;
158 struct shmob_drm_device *sdev = crtc->dev->dev_private;
159 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
160 const struct shmob_drm_format_info *format;
161 struct drm_device *dev = sdev->ddev;
162 struct drm_plane *plane;
163 u32 value;
164 int ret;
165
166 if (scrtc->started)
167 return;
168
169 format = shmob_drm_format_info(crtc->primary->fb->format->format);
170 if (WARN_ON(format == NULL))
171 return;
172
173 /* Enable clocks before accessing the hardware. */
174 ret = shmob_drm_clk_on(sdev);
175 if (ret < 0)
176 return;
177
178 /* Reset and enable the LCDC. */
179 lcdc_write(sdev, LDCNT2R, lcdc_read(sdev, LDCNT2R) | LDCNT2R_BR);
180 lcdc_wait_bit(sdev, LDCNT2R, LDCNT2R_BR, 0);
181 lcdc_write(sdev, LDCNT2R, LDCNT2R_ME);
182
183 /* Stop the LCDC first and disable all interrupts. */
184 shmob_drm_crtc_start_stop(scrtc, false);
185 lcdc_write(sdev, LDINTR, 0);
186
187 /* Configure power supply, dot clocks and start them. */
188 lcdc_write(sdev, LDPMR, 0);
189
190 value = sdev->lddckr;
191 if (idata->clk_div) {
192 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
193 * denominator.
194 */
195 lcdc_write(sdev, LDDCKPAT1R, 0);
196 lcdc_write(sdev, LDDCKPAT2R, (1 << (idata->clk_div / 2)) - 1);
197
198 if (idata->clk_div == 1)
199 value |= LDDCKR_MOSEL;
200 else
201 value |= idata->clk_div;
202 }
203
204 lcdc_write(sdev, LDDCKR, value);
205 lcdc_write(sdev, LDDCKSTPR, 0);
206 lcdc_wait_bit(sdev, LDDCKSTPR, ~0, 0);
207
208 /* TODO: Setup SYS panel */
209
210 /* Setup geometry, format, frame buffer memory and operation mode. */
211 shmob_drm_crtc_setup_geometry(scrtc);
212
213 /* TODO: Handle YUV colorspaces. Hardcode REC709 for now. */
214 lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
215 lcdc_write(sdev, LDMLSR, scrtc->line_size);
216 lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
217 if (format->yuv)
218 lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
219 lcdc_write(sdev, LDSM1R, 0);
220
221 /* Word and long word swap. */
222 switch (format->fourcc) {
223 case DRM_FORMAT_RGB565:
224 case DRM_FORMAT_NV21:
225 case DRM_FORMAT_NV61:
226 case DRM_FORMAT_NV42:
227 value = LDDDSR_LS | LDDDSR_WS;
228 break;
229 case DRM_FORMAT_RGB888:
230 case DRM_FORMAT_NV12:
231 case DRM_FORMAT_NV16:
232 case DRM_FORMAT_NV24:
233 value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
234 break;
235 case DRM_FORMAT_ARGB8888:
236 case DRM_FORMAT_XRGB8888:
237 default:
238 value = LDDDSR_LS;
239 break;
240 }
241 lcdc_write(sdev, LDDDSR, value);
242
243 /* Setup planes. */
244 drm_for_each_legacy_plane(plane, dev) {
245 if (plane->crtc == crtc)
246 shmob_drm_plane_setup(plane);
247 }
248
249 /* Enable the display output. */
250 lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
251
252 shmob_drm_crtc_start_stop(scrtc, true);
253
254 scrtc->started = true;
255 }
256
shmob_drm_crtc_stop(struct shmob_drm_crtc * scrtc)257 static void shmob_drm_crtc_stop(struct shmob_drm_crtc *scrtc)
258 {
259 struct drm_crtc *crtc = &scrtc->crtc;
260 struct shmob_drm_device *sdev = crtc->dev->dev_private;
261
262 if (!scrtc->started)
263 return;
264
265 /* Stop the LCDC. */
266 shmob_drm_crtc_start_stop(scrtc, false);
267
268 /* Disable the display output. */
269 lcdc_write(sdev, LDCNT1R, 0);
270
271 /* Stop clocks. */
272 shmob_drm_clk_off(sdev);
273
274 scrtc->started = false;
275 }
276
shmob_drm_crtc_suspend(struct shmob_drm_crtc * scrtc)277 void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
278 {
279 shmob_drm_crtc_stop(scrtc);
280 }
281
shmob_drm_crtc_resume(struct shmob_drm_crtc * scrtc)282 void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
283 {
284 if (scrtc->dpms != DRM_MODE_DPMS_ON)
285 return;
286
287 shmob_drm_crtc_start(scrtc);
288 }
289
shmob_drm_crtc_compute_base(struct shmob_drm_crtc * scrtc,int x,int y)290 static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
291 int x, int y)
292 {
293 struct drm_crtc *crtc = &scrtc->crtc;
294 struct drm_framebuffer *fb = crtc->primary->fb;
295 struct drm_gem_dma_object *gem;
296 unsigned int bpp;
297
298 bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
299 gem = drm_fb_dma_get_gem_obj(fb, 0);
300 scrtc->dma[0] = gem->dma_addr + fb->offsets[0]
301 + y * fb->pitches[0] + x * bpp / 8;
302
303 if (scrtc->format->yuv) {
304 bpp = scrtc->format->bpp - 8;
305 gem = drm_fb_dma_get_gem_obj(fb, 1);
306 scrtc->dma[1] = gem->dma_addr + fb->offsets[1]
307 + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
308 + x * (bpp == 16 ? 2 : 1);
309 }
310 }
311
shmob_drm_crtc_update_base(struct shmob_drm_crtc * scrtc)312 static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
313 {
314 struct drm_crtc *crtc = &scrtc->crtc;
315 struct shmob_drm_device *sdev = crtc->dev->dev_private;
316
317 shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
318
319 lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
320 if (scrtc->format->yuv)
321 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
322
323 lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
324 }
325
326 #define to_shmob_crtc(c) container_of(c, struct shmob_drm_crtc, crtc)
327
shmob_drm_crtc_dpms(struct drm_crtc * crtc,int mode)328 static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
329 {
330 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
331
332 if (scrtc->dpms == mode)
333 return;
334
335 if (mode == DRM_MODE_DPMS_ON)
336 shmob_drm_crtc_start(scrtc);
337 else
338 shmob_drm_crtc_stop(scrtc);
339
340 scrtc->dpms = mode;
341 }
342
shmob_drm_crtc_mode_prepare(struct drm_crtc * crtc)343 static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
344 {
345 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
346 }
347
shmob_drm_crtc_mode_set(struct drm_crtc * crtc,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode,int x,int y,struct drm_framebuffer * old_fb)348 static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
349 struct drm_display_mode *mode,
350 struct drm_display_mode *adjusted_mode,
351 int x, int y,
352 struct drm_framebuffer *old_fb)
353 {
354 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
355 struct shmob_drm_device *sdev = crtc->dev->dev_private;
356 const struct shmob_drm_format_info *format;
357
358 format = shmob_drm_format_info(crtc->primary->fb->format->format);
359 if (format == NULL) {
360 dev_dbg(sdev->dev, "mode_set: unsupported format %p4cc\n",
361 &crtc->primary->fb->format->format);
362 return -EINVAL;
363 }
364
365 scrtc->format = format;
366 scrtc->line_size = crtc->primary->fb->pitches[0];
367
368 shmob_drm_crtc_compute_base(scrtc, x, y);
369
370 return 0;
371 }
372
shmob_drm_crtc_mode_commit(struct drm_crtc * crtc)373 static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
374 {
375 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
376 }
377
shmob_drm_crtc_mode_set_base(struct drm_crtc * crtc,int x,int y,struct drm_framebuffer * old_fb)378 static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
379 struct drm_framebuffer *old_fb)
380 {
381 shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
382
383 return 0;
384 }
385
386 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
387 .dpms = shmob_drm_crtc_dpms,
388 .prepare = shmob_drm_crtc_mode_prepare,
389 .commit = shmob_drm_crtc_mode_commit,
390 .mode_set = shmob_drm_crtc_mode_set,
391 .mode_set_base = shmob_drm_crtc_mode_set_base,
392 };
393
shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc * scrtc)394 void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
395 {
396 struct drm_pending_vblank_event *event;
397 struct drm_device *dev = scrtc->crtc.dev;
398 unsigned long flags;
399
400 spin_lock_irqsave(&dev->event_lock, flags);
401 event = scrtc->event;
402 scrtc->event = NULL;
403 if (event) {
404 drm_crtc_send_vblank_event(&scrtc->crtc, event);
405 drm_crtc_vblank_put(&scrtc->crtc);
406 }
407 spin_unlock_irqrestore(&dev->event_lock, flags);
408 }
409
shmob_drm_crtc_page_flip(struct drm_crtc * crtc,struct drm_framebuffer * fb,struct drm_pending_vblank_event * event,uint32_t page_flip_flags,struct drm_modeset_acquire_ctx * ctx)410 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
411 struct drm_framebuffer *fb,
412 struct drm_pending_vblank_event *event,
413 uint32_t page_flip_flags,
414 struct drm_modeset_acquire_ctx *ctx)
415 {
416 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
417 struct drm_device *dev = scrtc->crtc.dev;
418 unsigned long flags;
419
420 spin_lock_irqsave(&dev->event_lock, flags);
421 if (scrtc->event != NULL) {
422 spin_unlock_irqrestore(&dev->event_lock, flags);
423 return -EBUSY;
424 }
425 spin_unlock_irqrestore(&dev->event_lock, flags);
426
427 crtc->primary->fb = fb;
428 shmob_drm_crtc_update_base(scrtc);
429
430 if (event) {
431 event->pipe = 0;
432 drm_crtc_vblank_get(&scrtc->crtc);
433 spin_lock_irqsave(&dev->event_lock, flags);
434 scrtc->event = event;
435 spin_unlock_irqrestore(&dev->event_lock, flags);
436 }
437
438 return 0;
439 }
440
shmob_drm_crtc_enable_vblank(struct shmob_drm_device * sdev,bool enable)441 static void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev,
442 bool enable)
443 {
444 unsigned long flags;
445 u32 ldintr;
446
447 /* Be careful not to acknowledge any pending interrupt. */
448 spin_lock_irqsave(&sdev->irq_lock, flags);
449 ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
450 if (enable)
451 ldintr |= LDINTR_VEE;
452 else
453 ldintr &= ~LDINTR_VEE;
454 lcdc_write(sdev, LDINTR, ldintr);
455 spin_unlock_irqrestore(&sdev->irq_lock, flags);
456 }
457
shmob_drm_enable_vblank(struct drm_crtc * crtc)458 static int shmob_drm_enable_vblank(struct drm_crtc *crtc)
459 {
460 struct shmob_drm_device *sdev = crtc->dev->dev_private;
461
462 shmob_drm_crtc_enable_vblank(sdev, true);
463
464 return 0;
465 }
466
shmob_drm_disable_vblank(struct drm_crtc * crtc)467 static void shmob_drm_disable_vblank(struct drm_crtc *crtc)
468 {
469 struct shmob_drm_device *sdev = crtc->dev->dev_private;
470
471 shmob_drm_crtc_enable_vblank(sdev, false);
472 }
473
474 static const struct drm_crtc_funcs crtc_funcs = {
475 .destroy = drm_crtc_cleanup,
476 .set_config = drm_crtc_helper_set_config,
477 .page_flip = shmob_drm_crtc_page_flip,
478 .enable_vblank = shmob_drm_enable_vblank,
479 .disable_vblank = shmob_drm_disable_vblank,
480 };
481
482 static const uint32_t modeset_formats[] = {
483 DRM_FORMAT_RGB565,
484 DRM_FORMAT_RGB888,
485 DRM_FORMAT_ARGB8888,
486 DRM_FORMAT_XRGB8888,
487 };
488
489 static const struct drm_plane_funcs primary_plane_funcs = {
490 DRM_PLANE_NON_ATOMIC_FUNCS,
491 };
492
shmob_drm_crtc_create(struct shmob_drm_device * sdev)493 int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
494 {
495 struct drm_crtc *crtc = &sdev->crtc.crtc;
496 struct drm_plane *primary;
497 int ret;
498
499 sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
500
501 primary = __drm_universal_plane_alloc(sdev->ddev, sizeof(*primary), 0,
502 0, &primary_plane_funcs,
503 modeset_formats,
504 ARRAY_SIZE(modeset_formats),
505 NULL, DRM_PLANE_TYPE_PRIMARY,
506 NULL);
507 if (IS_ERR(primary))
508 return PTR_ERR(primary);
509
510 ret = drm_crtc_init_with_planes(sdev->ddev, crtc, primary, NULL,
511 &crtc_funcs, NULL);
512 if (ret < 0) {
513 drm_plane_cleanup(primary);
514 kfree(primary);
515 return ret;
516 }
517
518 drm_crtc_helper_add(crtc, &crtc_helper_funcs);
519
520 return 0;
521 }
522
523 /* -----------------------------------------------------------------------------
524 * Encoder
525 */
526
527 #define to_shmob_encoder(e) \
528 container_of(e, struct shmob_drm_encoder, encoder)
529
shmob_drm_encoder_dpms(struct drm_encoder * encoder,int mode)530 static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
531 {
532 struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
533 struct shmob_drm_device *sdev = encoder->dev->dev_private;
534 struct shmob_drm_connector *scon = &sdev->connector;
535
536 if (senc->dpms == mode)
537 return;
538
539 shmob_drm_backlight_dpms(scon, mode);
540
541 senc->dpms = mode;
542 }
543
shmob_drm_encoder_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)544 static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
545 const struct drm_display_mode *mode,
546 struct drm_display_mode *adjusted_mode)
547 {
548 struct drm_device *dev = encoder->dev;
549 struct shmob_drm_device *sdev = dev->dev_private;
550 struct drm_connector *connector = &sdev->connector.connector;
551 const struct drm_display_mode *panel_mode;
552
553 if (list_empty(&connector->modes)) {
554 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
555 return false;
556 }
557
558 /* The flat panel mode is fixed, just copy it to the adjusted mode. */
559 panel_mode = list_first_entry(&connector->modes,
560 struct drm_display_mode, head);
561 drm_mode_copy(adjusted_mode, panel_mode);
562
563 return true;
564 }
565
shmob_drm_encoder_mode_prepare(struct drm_encoder * encoder)566 static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
567 {
568 /* No-op, everything is handled in the CRTC code. */
569 }
570
shmob_drm_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)571 static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
572 struct drm_display_mode *mode,
573 struct drm_display_mode *adjusted_mode)
574 {
575 /* No-op, everything is handled in the CRTC code. */
576 }
577
shmob_drm_encoder_mode_commit(struct drm_encoder * encoder)578 static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
579 {
580 /* No-op, everything is handled in the CRTC code. */
581 }
582
583 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
584 .dpms = shmob_drm_encoder_dpms,
585 .mode_fixup = shmob_drm_encoder_mode_fixup,
586 .prepare = shmob_drm_encoder_mode_prepare,
587 .commit = shmob_drm_encoder_mode_commit,
588 .mode_set = shmob_drm_encoder_mode_set,
589 };
590
shmob_drm_encoder_create(struct shmob_drm_device * sdev)591 int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
592 {
593 struct drm_encoder *encoder = &sdev->encoder.encoder;
594 int ret;
595
596 sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
597
598 encoder->possible_crtcs = 1;
599
600 ret = drm_simple_encoder_init(sdev->ddev, encoder,
601 DRM_MODE_ENCODER_LVDS);
602 if (ret < 0)
603 return ret;
604
605 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
606
607 return 0;
608 }
609
610 /* -----------------------------------------------------------------------------
611 * Connector
612 */
613
614 #define to_shmob_connector(c) \
615 container_of(c, struct shmob_drm_connector, connector)
616
shmob_drm_connector_get_modes(struct drm_connector * connector)617 static int shmob_drm_connector_get_modes(struct drm_connector *connector)
618 {
619 struct shmob_drm_device *sdev = connector->dev->dev_private;
620 struct drm_display_mode *mode;
621
622 mode = drm_mode_create(connector->dev);
623 if (mode == NULL)
624 return 0;
625
626 mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
627 mode->clock = sdev->pdata->panel.mode.clock;
628 mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
629 mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
630 mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
631 mode->htotal = sdev->pdata->panel.mode.htotal;
632 mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
633 mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
634 mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
635 mode->vtotal = sdev->pdata->panel.mode.vtotal;
636 mode->flags = sdev->pdata->panel.mode.flags;
637
638 drm_mode_set_name(mode);
639 drm_mode_probed_add(connector, mode);
640
641 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
642 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
643
644 return 1;
645 }
646
647 static struct drm_encoder *
shmob_drm_connector_best_encoder(struct drm_connector * connector)648 shmob_drm_connector_best_encoder(struct drm_connector *connector)
649 {
650 struct shmob_drm_connector *scon = to_shmob_connector(connector);
651
652 return scon->encoder;
653 }
654
655 static const struct drm_connector_helper_funcs connector_helper_funcs = {
656 .get_modes = shmob_drm_connector_get_modes,
657 .best_encoder = shmob_drm_connector_best_encoder,
658 };
659
shmob_drm_connector_destroy(struct drm_connector * connector)660 static void shmob_drm_connector_destroy(struct drm_connector *connector)
661 {
662 struct shmob_drm_connector *scon = to_shmob_connector(connector);
663
664 shmob_drm_backlight_exit(scon);
665 drm_connector_unregister(connector);
666 drm_connector_cleanup(connector);
667 }
668
669 static const struct drm_connector_funcs connector_funcs = {
670 .dpms = drm_helper_connector_dpms,
671 .fill_modes = drm_helper_probe_single_connector_modes,
672 .destroy = shmob_drm_connector_destroy,
673 };
674
shmob_drm_connector_create(struct shmob_drm_device * sdev,struct drm_encoder * encoder)675 int shmob_drm_connector_create(struct shmob_drm_device *sdev,
676 struct drm_encoder *encoder)
677 {
678 struct drm_connector *connector = &sdev->connector.connector;
679 int ret;
680
681 sdev->connector.encoder = encoder;
682
683 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
684 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
685
686 ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
687 DRM_MODE_CONNECTOR_LVDS);
688 if (ret < 0)
689 return ret;
690
691 drm_connector_helper_add(connector, &connector_helper_funcs);
692
693 ret = shmob_drm_backlight_init(&sdev->connector);
694 if (ret < 0)
695 goto err_cleanup;
696
697 ret = drm_connector_attach_encoder(connector, encoder);
698 if (ret < 0)
699 goto err_backlight;
700
701 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
702 drm_object_property_set_value(&connector->base,
703 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
704
705 return 0;
706
707 err_backlight:
708 shmob_drm_backlight_exit(&sdev->connector);
709 err_cleanup:
710 drm_connector_cleanup(connector);
711 return ret;
712 }
713