This source file includes following definitions.
- decon_wait_for_vblank
- decon_clear_channels
- decon_ctx_initialize
- decon_ctx_remove
- decon_calc_clkdiv
- decon_commit
- decon_enable_vblank
- decon_disable_vblank
- decon_win_set_pixfmt
- decon_win_set_colkey
- decon_shadow_protect_win
- decon_atomic_begin
- decon_update_plane
- decon_disable_plane
- decon_atomic_flush
- decon_init
- decon_enable
- decon_disable
- decon_irq_handler
- decon_bind
- decon_unbind
- decon_probe
- decon_remove
- exynos7_decon_suspend
- exynos7_decon_resume
1
2
3
4
5
6
7
8
9
10 #include <linux/clk.h>
11 #include <linux/component.h>
12 #include <linux/kernel.h>
13 #include <linux/of.h>
14 #include <linux/of_address.h>
15 #include <linux/of_device.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18
19 #include <video/of_display_timing.h>
20 #include <video/of_videomode.h>
21
22 #include <drm/drm_fourcc.h>
23 #include <drm/drm_vblank.h>
24 #include <drm/exynos_drm.h>
25
26 #include "exynos_drm_crtc.h"
27 #include "exynos_drm_drv.h"
28 #include "exynos_drm_fb.h"
29 #include "exynos_drm_plane.h"
30 #include "regs-decon7.h"
31
32
33
34
35
36 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
37
38 #define WINDOWS_NR 2
39
40 struct decon_context {
41 struct device *dev;
42 struct drm_device *drm_dev;
43 void *dma_priv;
44 struct exynos_drm_crtc *crtc;
45 struct exynos_drm_plane planes[WINDOWS_NR];
46 struct exynos_drm_plane_config configs[WINDOWS_NR];
47 struct clk *pclk;
48 struct clk *aclk;
49 struct clk *eclk;
50 struct clk *vclk;
51 void __iomem *regs;
52 unsigned long irq_flags;
53 bool i80_if;
54 bool suspended;
55 wait_queue_head_t wait_vsync_queue;
56 atomic_t wait_vsync_event;
57
58 struct drm_encoder *encoder;
59 };
60
61 static const struct of_device_id decon_driver_dt_match[] = {
62 {.compatible = "samsung,exynos7-decon"},
63 {},
64 };
65 MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
66
67 static const uint32_t decon_formats[] = {
68 DRM_FORMAT_RGB565,
69 DRM_FORMAT_XRGB8888,
70 DRM_FORMAT_XBGR8888,
71 DRM_FORMAT_RGBX8888,
72 DRM_FORMAT_BGRX8888,
73 DRM_FORMAT_ARGB8888,
74 DRM_FORMAT_ABGR8888,
75 DRM_FORMAT_RGBA8888,
76 DRM_FORMAT_BGRA8888,
77 };
78
79 static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
80 DRM_PLANE_TYPE_PRIMARY,
81 DRM_PLANE_TYPE_CURSOR,
82 };
83
84 static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
85 {
86 struct decon_context *ctx = crtc->ctx;
87
88 if (ctx->suspended)
89 return;
90
91 atomic_set(&ctx->wait_vsync_event, 1);
92
93
94
95
96
97 if (!wait_event_timeout(ctx->wait_vsync_queue,
98 !atomic_read(&ctx->wait_vsync_event),
99 HZ/20))
100 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
101 }
102
103 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
104 {
105 struct decon_context *ctx = crtc->ctx;
106 unsigned int win, ch_enabled = 0;
107
108
109 for (win = 0; win < WINDOWS_NR; win++) {
110 u32 val = readl(ctx->regs + WINCON(win));
111
112 if (val & WINCONx_ENWIN) {
113 val &= ~WINCONx_ENWIN;
114 writel(val, ctx->regs + WINCON(win));
115 ch_enabled = 1;
116 }
117 }
118
119
120 if (ch_enabled)
121 decon_wait_for_vblank(ctx->crtc);
122 }
123
124 static int decon_ctx_initialize(struct decon_context *ctx,
125 struct drm_device *drm_dev)
126 {
127 ctx->drm_dev = drm_dev;
128
129 decon_clear_channels(ctx->crtc);
130
131 return exynos_drm_register_dma(drm_dev, ctx->dev, &ctx->dma_priv);
132 }
133
134 static void decon_ctx_remove(struct decon_context *ctx)
135 {
136
137 exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv);
138 }
139
140 static u32 decon_calc_clkdiv(struct decon_context *ctx,
141 const struct drm_display_mode *mode)
142 {
143 unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
144 u32 clkdiv;
145
146
147 clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
148
149 return (clkdiv < 0x100) ? clkdiv : 0xff;
150 }
151
152 static void decon_commit(struct exynos_drm_crtc *crtc)
153 {
154 struct decon_context *ctx = crtc->ctx;
155 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
156 u32 val, clkdiv;
157
158 if (ctx->suspended)
159 return;
160
161
162 if (mode->htotal == 0 || mode->vtotal == 0)
163 return;
164
165 if (!ctx->i80_if) {
166 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
167
168 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
169 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
170 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
171
172 val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);
173 writel(val, ctx->regs + VIDTCON0);
174
175 val = VIDTCON1_VSPW(vsync_len - 1);
176 writel(val, ctx->regs + VIDTCON1);
177
178
179 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
180 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
181 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
182
183
184 val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
185 writel(val, ctx->regs + VIDTCON2);
186
187 val = VIDTCON3_HSPW(hsync_len - 1);
188 writel(val, ctx->regs + VIDTCON3);
189 }
190
191
192 val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
193 VIDTCON4_HOZVAL(mode->hdisplay - 1);
194 writel(val, ctx->regs + VIDTCON4);
195
196 writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
197
198
199
200
201
202 val = VIDCON0_ENVID | VIDCON0_ENVID_F;
203 writel(val, ctx->regs + VIDCON0);
204
205 clkdiv = decon_calc_clkdiv(ctx, mode);
206 if (clkdiv > 1) {
207 val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
208 writel(val, ctx->regs + VCLKCON1);
209 writel(val, ctx->regs + VCLKCON2);
210 }
211
212 val = readl(ctx->regs + DECON_UPDATE);
213 val |= DECON_UPDATE_STANDALONE_F;
214 writel(val, ctx->regs + DECON_UPDATE);
215 }
216
217 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
218 {
219 struct decon_context *ctx = crtc->ctx;
220 u32 val;
221
222 if (ctx->suspended)
223 return -EPERM;
224
225 if (!test_and_set_bit(0, &ctx->irq_flags)) {
226 val = readl(ctx->regs + VIDINTCON0);
227
228 val |= VIDINTCON0_INT_ENABLE;
229
230 if (!ctx->i80_if) {
231 val |= VIDINTCON0_INT_FRAME;
232 val &= ~VIDINTCON0_FRAMESEL0_MASK;
233 val |= VIDINTCON0_FRAMESEL0_VSYNC;
234 }
235
236 writel(val, ctx->regs + VIDINTCON0);
237 }
238
239 return 0;
240 }
241
242 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
243 {
244 struct decon_context *ctx = crtc->ctx;
245 u32 val;
246
247 if (ctx->suspended)
248 return;
249
250 if (test_and_clear_bit(0, &ctx->irq_flags)) {
251 val = readl(ctx->regs + VIDINTCON0);
252
253 val &= ~VIDINTCON0_INT_ENABLE;
254 if (!ctx->i80_if)
255 val &= ~VIDINTCON0_INT_FRAME;
256
257 writel(val, ctx->regs + VIDINTCON0);
258 }
259 }
260
261 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
262 struct drm_framebuffer *fb)
263 {
264 unsigned long val;
265 int padding;
266
267 val = readl(ctx->regs + WINCON(win));
268 val &= ~WINCONx_BPPMODE_MASK;
269
270 switch (fb->format->format) {
271 case DRM_FORMAT_RGB565:
272 val |= WINCONx_BPPMODE_16BPP_565;
273 val |= WINCONx_BURSTLEN_16WORD;
274 break;
275 case DRM_FORMAT_XRGB8888:
276 val |= WINCONx_BPPMODE_24BPP_xRGB;
277 val |= WINCONx_BURSTLEN_16WORD;
278 break;
279 case DRM_FORMAT_XBGR8888:
280 val |= WINCONx_BPPMODE_24BPP_xBGR;
281 val |= WINCONx_BURSTLEN_16WORD;
282 break;
283 case DRM_FORMAT_RGBX8888:
284 val |= WINCONx_BPPMODE_24BPP_RGBx;
285 val |= WINCONx_BURSTLEN_16WORD;
286 break;
287 case DRM_FORMAT_BGRX8888:
288 val |= WINCONx_BPPMODE_24BPP_BGRx;
289 val |= WINCONx_BURSTLEN_16WORD;
290 break;
291 case DRM_FORMAT_ARGB8888:
292 val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
293 WINCONx_ALPHA_SEL;
294 val |= WINCONx_BURSTLEN_16WORD;
295 break;
296 case DRM_FORMAT_ABGR8888:
297 val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
298 WINCONx_ALPHA_SEL;
299 val |= WINCONx_BURSTLEN_16WORD;
300 break;
301 case DRM_FORMAT_RGBA8888:
302 val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
303 WINCONx_ALPHA_SEL;
304 val |= WINCONx_BURSTLEN_16WORD;
305 break;
306 case DRM_FORMAT_BGRA8888:
307 default:
308 val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
309 WINCONx_ALPHA_SEL;
310 val |= WINCONx_BURSTLEN_16WORD;
311 break;
312 }
313
314 DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]);
315
316
317
318
319
320
321
322
323
324 padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width;
325 if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {
326 val &= ~WINCONx_BURSTLEN_MASK;
327 val |= WINCONx_BURSTLEN_8WORD;
328 }
329
330 writel(val, ctx->regs + WINCON(win));
331 }
332
333 static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
334 {
335 unsigned int keycon0 = 0, keycon1 = 0;
336
337 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
338 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
339
340 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
341
342 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
343 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
344 }
345
346
347
348
349
350
351
352 static void decon_shadow_protect_win(struct decon_context *ctx,
353 unsigned int win, bool protect)
354 {
355 u32 bits, val;
356
357 bits = SHADOWCON_WINx_PROTECT(win);
358
359 val = readl(ctx->regs + SHADOWCON);
360 if (protect)
361 val |= bits;
362 else
363 val &= ~bits;
364 writel(val, ctx->regs + SHADOWCON);
365 }
366
367 static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
368 {
369 struct decon_context *ctx = crtc->ctx;
370 int i;
371
372 if (ctx->suspended)
373 return;
374
375 for (i = 0; i < WINDOWS_NR; i++)
376 decon_shadow_protect_win(ctx, i, true);
377 }
378
379 static void decon_update_plane(struct exynos_drm_crtc *crtc,
380 struct exynos_drm_plane *plane)
381 {
382 struct exynos_drm_plane_state *state =
383 to_exynos_plane_state(plane->base.state);
384 struct decon_context *ctx = crtc->ctx;
385 struct drm_framebuffer *fb = state->base.fb;
386 int padding;
387 unsigned long val, alpha;
388 unsigned int last_x;
389 unsigned int last_y;
390 unsigned int win = plane->index;
391 unsigned int cpp = fb->format->cpp[0];
392 unsigned int pitch = fb->pitches[0];
393
394 if (ctx->suspended)
395 return;
396
397
398
399
400
401
402
403
404
405
406
407
408 val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0);
409 writel(val, ctx->regs + VIDW_BUF_START(win));
410
411 padding = (pitch / cpp) - fb->width;
412
413
414 writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));
415 writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win));
416
417
418 writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win));
419 writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win));
420
421 DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n",
422 (unsigned long)val);
423 DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
424 state->crtc.w, state->crtc.h);
425
426 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
427 VIDOSDxA_TOPLEFT_Y(state->crtc.y);
428 writel(val, ctx->regs + VIDOSD_A(win));
429
430 last_x = state->crtc.x + state->crtc.w;
431 if (last_x)
432 last_x--;
433 last_y = state->crtc.y + state->crtc.h;
434 if (last_y)
435 last_y--;
436
437 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y);
438
439 writel(val, ctx->regs + VIDOSD_B(win));
440
441 DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
442 state->crtc.x, state->crtc.y, last_x, last_y);
443
444
445 alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
446 VIDOSDxC_ALPHA0_G_F(0x0) |
447 VIDOSDxC_ALPHA0_B_F(0x0);
448
449 writel(alpha, ctx->regs + VIDOSD_C(win));
450
451 alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
452 VIDOSDxD_ALPHA1_G_F(0xff) |
453 VIDOSDxD_ALPHA1_B_F(0xff);
454
455 writel(alpha, ctx->regs + VIDOSD_D(win));
456
457 decon_win_set_pixfmt(ctx, win, fb);
458
459
460 if (win != 0)
461 decon_win_set_colkey(ctx, win);
462
463
464 val = readl(ctx->regs + WINCON(win));
465 val |= WINCONx_TRIPLE_BUF_MODE;
466 val |= WINCONx_ENWIN;
467 writel(val, ctx->regs + WINCON(win));
468
469
470 decon_shadow_protect_win(ctx, win, false);
471
472 val = readl(ctx->regs + DECON_UPDATE);
473 val |= DECON_UPDATE_STANDALONE_F;
474 writel(val, ctx->regs + DECON_UPDATE);
475 }
476
477 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
478 struct exynos_drm_plane *plane)
479 {
480 struct decon_context *ctx = crtc->ctx;
481 unsigned int win = plane->index;
482 u32 val;
483
484 if (ctx->suspended)
485 return;
486
487
488 decon_shadow_protect_win(ctx, win, true);
489
490
491 val = readl(ctx->regs + WINCON(win));
492 val &= ~WINCONx_ENWIN;
493 writel(val, ctx->regs + WINCON(win));
494
495 val = readl(ctx->regs + DECON_UPDATE);
496 val |= DECON_UPDATE_STANDALONE_F;
497 writel(val, ctx->regs + DECON_UPDATE);
498 }
499
500 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
501 {
502 struct decon_context *ctx = crtc->ctx;
503 int i;
504
505 if (ctx->suspended)
506 return;
507
508 for (i = 0; i < WINDOWS_NR; i++)
509 decon_shadow_protect_win(ctx, i, false);
510 exynos_crtc_handle_event(crtc);
511 }
512
513 static void decon_init(struct decon_context *ctx)
514 {
515 u32 val;
516
517 writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
518
519 val = VIDOUTCON0_DISP_IF_0_ON;
520 if (!ctx->i80_if)
521 val |= VIDOUTCON0_RGBIF;
522 writel(val, ctx->regs + VIDOUTCON0);
523
524 writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
525
526 if (!ctx->i80_if)
527 writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
528 }
529
530 static void decon_enable(struct exynos_drm_crtc *crtc)
531 {
532 struct decon_context *ctx = crtc->ctx;
533
534 if (!ctx->suspended)
535 return;
536
537 pm_runtime_get_sync(ctx->dev);
538
539 decon_init(ctx);
540
541
542 if (test_and_clear_bit(0, &ctx->irq_flags))
543 decon_enable_vblank(ctx->crtc);
544
545 decon_commit(ctx->crtc);
546
547 ctx->suspended = false;
548 }
549
550 static void decon_disable(struct exynos_drm_crtc *crtc)
551 {
552 struct decon_context *ctx = crtc->ctx;
553 int i;
554
555 if (ctx->suspended)
556 return;
557
558
559
560
561
562
563 for (i = 0; i < WINDOWS_NR; i++)
564 decon_disable_plane(crtc, &ctx->planes[i]);
565
566 pm_runtime_put_sync(ctx->dev);
567
568 ctx->suspended = true;
569 }
570
571 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
572 .enable = decon_enable,
573 .disable = decon_disable,
574 .enable_vblank = decon_enable_vblank,
575 .disable_vblank = decon_disable_vblank,
576 .atomic_begin = decon_atomic_begin,
577 .update_plane = decon_update_plane,
578 .disable_plane = decon_disable_plane,
579 .atomic_flush = decon_atomic_flush,
580 };
581
582
583 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
584 {
585 struct decon_context *ctx = (struct decon_context *)dev_id;
586 u32 val, clear_bit;
587
588 val = readl(ctx->regs + VIDINTCON1);
589
590 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
591 if (val & clear_bit)
592 writel(clear_bit, ctx->regs + VIDINTCON1);
593
594
595 if (!ctx->drm_dev)
596 goto out;
597
598 if (!ctx->i80_if) {
599 drm_crtc_handle_vblank(&ctx->crtc->base);
600
601
602 if (atomic_read(&ctx->wait_vsync_event)) {
603 atomic_set(&ctx->wait_vsync_event, 0);
604 wake_up(&ctx->wait_vsync_queue);
605 }
606 }
607 out:
608 return IRQ_HANDLED;
609 }
610
611 static int decon_bind(struct device *dev, struct device *master, void *data)
612 {
613 struct decon_context *ctx = dev_get_drvdata(dev);
614 struct drm_device *drm_dev = data;
615 struct exynos_drm_plane *exynos_plane;
616 unsigned int i;
617 int ret;
618
619 ret = decon_ctx_initialize(ctx, drm_dev);
620 if (ret) {
621 DRM_DEV_ERROR(dev, "decon_ctx_initialize failed.\n");
622 return ret;
623 }
624
625 for (i = 0; i < WINDOWS_NR; i++) {
626 ctx->configs[i].pixel_formats = decon_formats;
627 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats);
628 ctx->configs[i].zpos = i;
629 ctx->configs[i].type = decon_win_types[i];
630
631 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
632 &ctx->configs[i]);
633 if (ret)
634 return ret;
635 }
636
637 exynos_plane = &ctx->planes[DEFAULT_WIN];
638 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
639 EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx);
640 if (IS_ERR(ctx->crtc)) {
641 decon_ctx_remove(ctx);
642 return PTR_ERR(ctx->crtc);
643 }
644
645 if (ctx->encoder)
646 exynos_dpi_bind(drm_dev, ctx->encoder);
647
648 return 0;
649
650 }
651
652 static void decon_unbind(struct device *dev, struct device *master,
653 void *data)
654 {
655 struct decon_context *ctx = dev_get_drvdata(dev);
656
657 decon_disable(ctx->crtc);
658
659 if (ctx->encoder)
660 exynos_dpi_remove(ctx->encoder);
661
662 decon_ctx_remove(ctx);
663 }
664
665 static const struct component_ops decon_component_ops = {
666 .bind = decon_bind,
667 .unbind = decon_unbind,
668 };
669
670 static int decon_probe(struct platform_device *pdev)
671 {
672 struct device *dev = &pdev->dev;
673 struct decon_context *ctx;
674 struct device_node *i80_if_timings;
675 struct resource *res;
676 int ret;
677
678 if (!dev->of_node)
679 return -ENODEV;
680
681 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
682 if (!ctx)
683 return -ENOMEM;
684
685 ctx->dev = dev;
686 ctx->suspended = true;
687
688 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
689 if (i80_if_timings)
690 ctx->i80_if = true;
691 of_node_put(i80_if_timings);
692
693 ctx->regs = of_iomap(dev->of_node, 0);
694 if (!ctx->regs)
695 return -ENOMEM;
696
697 ctx->pclk = devm_clk_get(dev, "pclk_decon0");
698 if (IS_ERR(ctx->pclk)) {
699 dev_err(dev, "failed to get bus clock pclk\n");
700 ret = PTR_ERR(ctx->pclk);
701 goto err_iounmap;
702 }
703
704 ctx->aclk = devm_clk_get(dev, "aclk_decon0");
705 if (IS_ERR(ctx->aclk)) {
706 dev_err(dev, "failed to get bus clock aclk\n");
707 ret = PTR_ERR(ctx->aclk);
708 goto err_iounmap;
709 }
710
711 ctx->eclk = devm_clk_get(dev, "decon0_eclk");
712 if (IS_ERR(ctx->eclk)) {
713 dev_err(dev, "failed to get eclock\n");
714 ret = PTR_ERR(ctx->eclk);
715 goto err_iounmap;
716 }
717
718 ctx->vclk = devm_clk_get(dev, "decon0_vclk");
719 if (IS_ERR(ctx->vclk)) {
720 dev_err(dev, "failed to get vclock\n");
721 ret = PTR_ERR(ctx->vclk);
722 goto err_iounmap;
723 }
724
725 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
726 ctx->i80_if ? "lcd_sys" : "vsync");
727 if (!res) {
728 dev_err(dev, "irq request failed.\n");
729 ret = -ENXIO;
730 goto err_iounmap;
731 }
732
733 ret = devm_request_irq(dev, res->start, decon_irq_handler,
734 0, "drm_decon", ctx);
735 if (ret) {
736 dev_err(dev, "irq request failed.\n");
737 goto err_iounmap;
738 }
739
740 init_waitqueue_head(&ctx->wait_vsync_queue);
741 atomic_set(&ctx->wait_vsync_event, 0);
742
743 platform_set_drvdata(pdev, ctx);
744
745 ctx->encoder = exynos_dpi_probe(dev);
746 if (IS_ERR(ctx->encoder)) {
747 ret = PTR_ERR(ctx->encoder);
748 goto err_iounmap;
749 }
750
751 pm_runtime_enable(dev);
752
753 ret = component_add(dev, &decon_component_ops);
754 if (ret)
755 goto err_disable_pm_runtime;
756
757 return ret;
758
759 err_disable_pm_runtime:
760 pm_runtime_disable(dev);
761
762 err_iounmap:
763 iounmap(ctx->regs);
764
765 return ret;
766 }
767
768 static int decon_remove(struct platform_device *pdev)
769 {
770 struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
771
772 pm_runtime_disable(&pdev->dev);
773
774 iounmap(ctx->regs);
775
776 component_del(&pdev->dev, &decon_component_ops);
777
778 return 0;
779 }
780
781 #ifdef CONFIG_PM
782 static int exynos7_decon_suspend(struct device *dev)
783 {
784 struct decon_context *ctx = dev_get_drvdata(dev);
785
786 clk_disable_unprepare(ctx->vclk);
787 clk_disable_unprepare(ctx->eclk);
788 clk_disable_unprepare(ctx->aclk);
789 clk_disable_unprepare(ctx->pclk);
790
791 return 0;
792 }
793
794 static int exynos7_decon_resume(struct device *dev)
795 {
796 struct decon_context *ctx = dev_get_drvdata(dev);
797 int ret;
798
799 ret = clk_prepare_enable(ctx->pclk);
800 if (ret < 0) {
801 DRM_DEV_ERROR(dev, "Failed to prepare_enable the pclk [%d]\n",
802 ret);
803 return ret;
804 }
805
806 ret = clk_prepare_enable(ctx->aclk);
807 if (ret < 0) {
808 DRM_DEV_ERROR(dev, "Failed to prepare_enable the aclk [%d]\n",
809 ret);
810 return ret;
811 }
812
813 ret = clk_prepare_enable(ctx->eclk);
814 if (ret < 0) {
815 DRM_DEV_ERROR(dev, "Failed to prepare_enable the eclk [%d]\n",
816 ret);
817 return ret;
818 }
819
820 ret = clk_prepare_enable(ctx->vclk);
821 if (ret < 0) {
822 DRM_DEV_ERROR(dev, "Failed to prepare_enable the vclk [%d]\n",
823 ret);
824 return ret;
825 }
826
827 return 0;
828 }
829 #endif
830
831 static const struct dev_pm_ops exynos7_decon_pm_ops = {
832 SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume,
833 NULL)
834 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
835 pm_runtime_force_resume)
836 };
837
838 struct platform_driver decon_driver = {
839 .probe = decon_probe,
840 .remove = decon_remove,
841 .driver = {
842 .name = "exynos-decon",
843 .pm = &exynos7_decon_pm_ops,
844 .of_match_table = decon_driver_dt_match,
845 },
846 };