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drm/exynos: add drm_iommu_attach_device_if_possible()
[deliverable/linux.git] / drivers / gpu / drm / exynos / exynos7_drm_decon.c
1 /* drivers/gpu/drm/exynos/exynos7_drm_decon.c
2 *
3 * Copyright (C) 2014 Samsung Electronics Co.Ltd
4 * Authors:
5 * Akshu Agarwal <akshua@gmail.com>
6 * Ajay Kumar <ajaykumar.rs@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14 #include <drm/drmP.h>
15 #include <drm/exynos_drm.h>
16
17 #include <linux/clk.h>
18 #include <linux/component.h>
19 #include <linux/kernel.h>
20 #include <linux/of.h>
21 #include <linux/of_address.h>
22 #include <linux/of_device.h>
23 #include <linux/platform_device.h>
24 #include <linux/pm_runtime.h>
25
26 #include <video/of_display_timing.h>
27 #include <video/of_videomode.h>
28 #include <video/exynos7_decon.h>
29
30 #include "exynos_drm_crtc.h"
31 #include "exynos_drm_plane.h"
32 #include "exynos_drm_drv.h"
33 #include "exynos_drm_fbdev.h"
34 #include "exynos_drm_iommu.h"
35
36 /*
37 * DECON stands for Display and Enhancement controller.
38 */
39
40 #define DECON_DEFAULT_FRAMERATE 60
41 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
42
43 #define WINDOWS_NR 2
44
45 struct decon_context {
46 struct device *dev;
47 struct drm_device *drm_dev;
48 struct exynos_drm_crtc *crtc;
49 struct exynos_drm_plane planes[WINDOWS_NR];
50 struct clk *pclk;
51 struct clk *aclk;
52 struct clk *eclk;
53 struct clk *vclk;
54 void __iomem *regs;
55 unsigned int default_win;
56 unsigned long irq_flags;
57 bool i80_if;
58 bool suspended;
59 int pipe;
60 wait_queue_head_t wait_vsync_queue;
61 atomic_t wait_vsync_event;
62
63 struct exynos_drm_panel_info panel;
64 struct exynos_drm_display *display;
65 };
66
67 static const struct of_device_id decon_driver_dt_match[] = {
68 {.compatible = "samsung,exynos7-decon"},
69 {},
70 };
71 MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
72
73 static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
74 {
75 struct decon_context *ctx = crtc->ctx;
76
77 if (ctx->suspended)
78 return;
79
80 atomic_set(&ctx->wait_vsync_event, 1);
81
82 /*
83 * wait for DECON to signal VSYNC interrupt or return after
84 * timeout which is set to 50ms (refresh rate of 20).
85 */
86 if (!wait_event_timeout(ctx->wait_vsync_queue,
87 !atomic_read(&ctx->wait_vsync_event),
88 HZ/20))
89 DRM_DEBUG_KMS("vblank wait timed out.\n");
90 }
91
92 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
93 {
94 struct decon_context *ctx = crtc->ctx;
95 unsigned int win, ch_enabled = 0;
96
97 DRM_DEBUG_KMS("%s\n", __FILE__);
98
99 /* Check if any channel is enabled. */
100 for (win = 0; win < WINDOWS_NR; win++) {
101 u32 val = readl(ctx->regs + WINCON(win));
102
103 if (val & WINCONx_ENWIN) {
104 val &= ~WINCONx_ENWIN;
105 writel(val, ctx->regs + WINCON(win));
106 ch_enabled = 1;
107 }
108 }
109
110 /* Wait for vsync, as disable channel takes effect at next vsync */
111 if (ch_enabled) {
112 unsigned int state = ctx->suspended;
113
114 ctx->suspended = 0;
115 decon_wait_for_vblank(ctx->crtc);
116 ctx->suspended = state;
117 }
118 }
119
120 static int decon_ctx_initialize(struct decon_context *ctx,
121 struct drm_device *drm_dev)
122 {
123 struct exynos_drm_private *priv = drm_dev->dev_private;
124 int ret;
125
126 ctx->drm_dev = drm_dev;
127 ctx->pipe = priv->pipe++;
128
129 ret = drm_iommu_attach_device_if_possible(ctx->crtc, drm_dev, ctx->dev);
130 if (ret)
131 priv->pipe--;
132
133 return ret;
134 }
135
136 static void decon_ctx_remove(struct decon_context *ctx)
137 {
138 /* detach this sub driver from iommu mapping if supported. */
139 if (is_drm_iommu_supported(ctx->drm_dev))
140 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
141 }
142
143 static u32 decon_calc_clkdiv(struct decon_context *ctx,
144 const struct drm_display_mode *mode)
145 {
146 unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
147 u32 clkdiv;
148
149 /* Find the clock divider value that gets us closest to ideal_clk */
150 clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
151
152 return (clkdiv < 0x100) ? clkdiv : 0xff;
153 }
154
155 static bool decon_mode_fixup(struct exynos_drm_crtc *crtc,
156 const struct drm_display_mode *mode,
157 struct drm_display_mode *adjusted_mode)
158 {
159 if (adjusted_mode->vrefresh == 0)
160 adjusted_mode->vrefresh = DECON_DEFAULT_FRAMERATE;
161
162 return true;
163 }
164
165 static void decon_commit(struct exynos_drm_crtc *crtc)
166 {
167 struct decon_context *ctx = crtc->ctx;
168 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
169 u32 val, clkdiv;
170
171 if (ctx->suspended)
172 return;
173
174 /* nothing to do if we haven't set the mode yet */
175 if (mode->htotal == 0 || mode->vtotal == 0)
176 return;
177
178 if (!ctx->i80_if) {
179 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
180 /* setup vertical timing values. */
181 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
182 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
183 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
184
185 val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);
186 writel(val, ctx->regs + VIDTCON0);
187
188 val = VIDTCON1_VSPW(vsync_len - 1);
189 writel(val, ctx->regs + VIDTCON1);
190
191 /* setup horizontal timing values. */
192 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
193 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
194 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
195
196 /* setup horizontal timing values. */
197 val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
198 writel(val, ctx->regs + VIDTCON2);
199
200 val = VIDTCON3_HSPW(hsync_len - 1);
201 writel(val, ctx->regs + VIDTCON3);
202 }
203
204 /* setup horizontal and vertical display size. */
205 val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
206 VIDTCON4_HOZVAL(mode->hdisplay - 1);
207 writel(val, ctx->regs + VIDTCON4);
208
209 writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
210
211 /*
212 * fields of register with prefix '_F' would be updated
213 * at vsync(same as dma start)
214 */
215 val = VIDCON0_ENVID | VIDCON0_ENVID_F;
216 writel(val, ctx->regs + VIDCON0);
217
218 clkdiv = decon_calc_clkdiv(ctx, mode);
219 if (clkdiv > 1) {
220 val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
221 writel(val, ctx->regs + VCLKCON1);
222 writel(val, ctx->regs + VCLKCON2);
223 }
224
225 val = readl(ctx->regs + DECON_UPDATE);
226 val |= DECON_UPDATE_STANDALONE_F;
227 writel(val, ctx->regs + DECON_UPDATE);
228 }
229
230 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
231 {
232 struct decon_context *ctx = crtc->ctx;
233 u32 val;
234
235 if (ctx->suspended)
236 return -EPERM;
237
238 if (!test_and_set_bit(0, &ctx->irq_flags)) {
239 val = readl(ctx->regs + VIDINTCON0);
240
241 val |= VIDINTCON0_INT_ENABLE;
242
243 if (!ctx->i80_if) {
244 val |= VIDINTCON0_INT_FRAME;
245 val &= ~VIDINTCON0_FRAMESEL0_MASK;
246 val |= VIDINTCON0_FRAMESEL0_VSYNC;
247 }
248
249 writel(val, ctx->regs + VIDINTCON0);
250 }
251
252 return 0;
253 }
254
255 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
256 {
257 struct decon_context *ctx = crtc->ctx;
258 u32 val;
259
260 if (ctx->suspended)
261 return;
262
263 if (test_and_clear_bit(0, &ctx->irq_flags)) {
264 val = readl(ctx->regs + VIDINTCON0);
265
266 val &= ~VIDINTCON0_INT_ENABLE;
267 if (!ctx->i80_if)
268 val &= ~VIDINTCON0_INT_FRAME;
269
270 writel(val, ctx->regs + VIDINTCON0);
271 }
272 }
273
274 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win)
275 {
276 struct exynos_drm_plane *plane = &ctx->planes[win];
277 unsigned long val;
278 int padding;
279
280 val = readl(ctx->regs + WINCON(win));
281 val &= ~WINCONx_BPPMODE_MASK;
282
283 switch (plane->pixel_format) {
284 case DRM_FORMAT_RGB565:
285 val |= WINCONx_BPPMODE_16BPP_565;
286 val |= WINCONx_BURSTLEN_16WORD;
287 break;
288 case DRM_FORMAT_XRGB8888:
289 val |= WINCONx_BPPMODE_24BPP_xRGB;
290 val |= WINCONx_BURSTLEN_16WORD;
291 break;
292 case DRM_FORMAT_XBGR8888:
293 val |= WINCONx_BPPMODE_24BPP_xBGR;
294 val |= WINCONx_BURSTLEN_16WORD;
295 break;
296 case DRM_FORMAT_RGBX8888:
297 val |= WINCONx_BPPMODE_24BPP_RGBx;
298 val |= WINCONx_BURSTLEN_16WORD;
299 break;
300 case DRM_FORMAT_BGRX8888:
301 val |= WINCONx_BPPMODE_24BPP_BGRx;
302 val |= WINCONx_BURSTLEN_16WORD;
303 break;
304 case DRM_FORMAT_ARGB8888:
305 val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
306 WINCONx_ALPHA_SEL;
307 val |= WINCONx_BURSTLEN_16WORD;
308 break;
309 case DRM_FORMAT_ABGR8888:
310 val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
311 WINCONx_ALPHA_SEL;
312 val |= WINCONx_BURSTLEN_16WORD;
313 break;
314 case DRM_FORMAT_RGBA8888:
315 val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
316 WINCONx_ALPHA_SEL;
317 val |= WINCONx_BURSTLEN_16WORD;
318 break;
319 case DRM_FORMAT_BGRA8888:
320 val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
321 WINCONx_ALPHA_SEL;
322 val |= WINCONx_BURSTLEN_16WORD;
323 break;
324 default:
325 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
326
327 val |= WINCONx_BPPMODE_24BPP_xRGB;
328 val |= WINCONx_BURSTLEN_16WORD;
329 break;
330 }
331
332 DRM_DEBUG_KMS("bpp = %d\n", plane->bpp);
333
334 /*
335 * In case of exynos, setting dma-burst to 16Word causes permanent
336 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
337 * switching which is based on plane size is not recommended as
338 * plane size varies a lot towards the end of the screen and rapid
339 * movement causes unstable DMA which results into iommu crash/tear.
340 */
341
342 padding = (plane->pitch / (plane->bpp >> 3)) - plane->fb_width;
343 if (plane->fb_width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {
344 val &= ~WINCONx_BURSTLEN_MASK;
345 val |= WINCONx_BURSTLEN_8WORD;
346 }
347
348 writel(val, ctx->regs + WINCON(win));
349 }
350
351 static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
352 {
353 unsigned int keycon0 = 0, keycon1 = 0;
354
355 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
356 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
357
358 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
359
360 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
361 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
362 }
363
364 /**
365 * shadow_protect_win() - disable updating values from shadow registers at vsync
366 *
367 * @win: window to protect registers for
368 * @protect: 1 to protect (disable updates)
369 */
370 static void decon_shadow_protect_win(struct decon_context *ctx,
371 unsigned int win, bool protect)
372 {
373 u32 bits, val;
374
375 bits = SHADOWCON_WINx_PROTECT(win);
376
377 val = readl(ctx->regs + SHADOWCON);
378 if (protect)
379 val |= bits;
380 else
381 val &= ~bits;
382 writel(val, ctx->regs + SHADOWCON);
383 }
384
385 static void decon_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
386 {
387 struct decon_context *ctx = crtc->ctx;
388 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
389 struct exynos_drm_plane *plane;
390 int padding;
391 unsigned long val, alpha;
392 unsigned int last_x;
393 unsigned int last_y;
394
395 if (ctx->suspended)
396 return;
397
398 if (win < 0 || win >= WINDOWS_NR)
399 return;
400
401 plane = &ctx->planes[win];
402
403 if (ctx->suspended)
404 return;
405
406 /*
407 * SHADOWCON/PRTCON register is used for enabling timing.
408 *
409 * for example, once only width value of a register is set,
410 * if the dma is started then decon hardware could malfunction so
411 * with protect window setting, the register fields with prefix '_F'
412 * wouldn't be updated at vsync also but updated once unprotect window
413 * is set.
414 */
415
416 /* protect windows */
417 decon_shadow_protect_win(ctx, win, true);
418
419 /* buffer start address */
420 val = (unsigned long)plane->dma_addr[0];
421 writel(val, ctx->regs + VIDW_BUF_START(win));
422
423 padding = (plane->pitch / (plane->bpp >> 3)) - plane->fb_width;
424
425 /* buffer size */
426 writel(plane->fb_width + padding, ctx->regs + VIDW_WHOLE_X(win));
427 writel(plane->fb_height, ctx->regs + VIDW_WHOLE_Y(win));
428
429 /* offset from the start of the buffer to read */
430 writel(plane->src_x, ctx->regs + VIDW_OFFSET_X(win));
431 writel(plane->src_y, ctx->regs + VIDW_OFFSET_Y(win));
432
433 DRM_DEBUG_KMS("start addr = 0x%lx\n",
434 (unsigned long)val);
435 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
436 plane->crtc_width, plane->crtc_height);
437
438 /*
439 * OSD position.
440 * In case the window layout goes of LCD layout, DECON fails.
441 */
442 if ((plane->crtc_x + plane->crtc_width) > mode->hdisplay)
443 plane->crtc_x = mode->hdisplay - plane->crtc_width;
444 if ((plane->crtc_y + plane->crtc_height) > mode->vdisplay)
445 plane->crtc_y = mode->vdisplay - plane->crtc_height;
446
447 val = VIDOSDxA_TOPLEFT_X(plane->crtc_x) |
448 VIDOSDxA_TOPLEFT_Y(plane->crtc_y);
449 writel(val, ctx->regs + VIDOSD_A(win));
450
451 last_x = plane->crtc_x + plane->crtc_width;
452 if (last_x)
453 last_x--;
454 last_y = plane->crtc_y + plane->crtc_height;
455 if (last_y)
456 last_y--;
457
458 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y);
459
460 writel(val, ctx->regs + VIDOSD_B(win));
461
462 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
463 plane->crtc_x, plane->crtc_y, last_x, last_y);
464
465 /* OSD alpha */
466 alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
467 VIDOSDxC_ALPHA0_G_F(0x0) |
468 VIDOSDxC_ALPHA0_B_F(0x0);
469
470 writel(alpha, ctx->regs + VIDOSD_C(win));
471
472 alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
473 VIDOSDxD_ALPHA1_G_F(0xff) |
474 VIDOSDxD_ALPHA1_B_F(0xff);
475
476 writel(alpha, ctx->regs + VIDOSD_D(win));
477
478 decon_win_set_pixfmt(ctx, win);
479
480 /* hardware window 0 doesn't support color key. */
481 if (win != 0)
482 decon_win_set_colkey(ctx, win);
483
484 /* wincon */
485 val = readl(ctx->regs + WINCON(win));
486 val |= WINCONx_TRIPLE_BUF_MODE;
487 val |= WINCONx_ENWIN;
488 writel(val, ctx->regs + WINCON(win));
489
490 /* Enable DMA channel and unprotect windows */
491 decon_shadow_protect_win(ctx, win, false);
492
493 val = readl(ctx->regs + DECON_UPDATE);
494 val |= DECON_UPDATE_STANDALONE_F;
495 writel(val, ctx->regs + DECON_UPDATE);
496 }
497
498 static void decon_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
499 {
500 struct decon_context *ctx = crtc->ctx;
501 struct exynos_drm_plane *plane;
502 u32 val;
503
504 if (win < 0 || win >= WINDOWS_NR)
505 return;
506
507 plane = &ctx->planes[win];
508
509 if (ctx->suspended)
510 return;
511
512 /* protect windows */
513 decon_shadow_protect_win(ctx, win, true);
514
515 /* wincon */
516 val = readl(ctx->regs + WINCON(win));
517 val &= ~WINCONx_ENWIN;
518 writel(val, ctx->regs + WINCON(win));
519
520 /* unprotect windows */
521 decon_shadow_protect_win(ctx, win, false);
522
523 val = readl(ctx->regs + DECON_UPDATE);
524 val |= DECON_UPDATE_STANDALONE_F;
525 writel(val, ctx->regs + DECON_UPDATE);
526 }
527
528 static void decon_init(struct decon_context *ctx)
529 {
530 u32 val;
531
532 writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
533
534 val = VIDOUTCON0_DISP_IF_0_ON;
535 if (!ctx->i80_if)
536 val |= VIDOUTCON0_RGBIF;
537 writel(val, ctx->regs + VIDOUTCON0);
538
539 writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
540
541 if (!ctx->i80_if)
542 writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
543 }
544
545 static void decon_enable(struct exynos_drm_crtc *crtc)
546 {
547 struct decon_context *ctx = crtc->ctx;
548 int ret;
549
550 if (!ctx->suspended)
551 return;
552
553 ctx->suspended = false;
554
555 pm_runtime_get_sync(ctx->dev);
556
557 ret = clk_prepare_enable(ctx->pclk);
558 if (ret < 0) {
559 DRM_ERROR("Failed to prepare_enable the pclk [%d]\n", ret);
560 return;
561 }
562
563 ret = clk_prepare_enable(ctx->aclk);
564 if (ret < 0) {
565 DRM_ERROR("Failed to prepare_enable the aclk [%d]\n", ret);
566 return;
567 }
568
569 ret = clk_prepare_enable(ctx->eclk);
570 if (ret < 0) {
571 DRM_ERROR("Failed to prepare_enable the eclk [%d]\n", ret);
572 return;
573 }
574
575 ret = clk_prepare_enable(ctx->vclk);
576 if (ret < 0) {
577 DRM_ERROR("Failed to prepare_enable the vclk [%d]\n", ret);
578 return;
579 }
580
581 decon_init(ctx);
582
583 /* if vblank was enabled status, enable it again. */
584 if (test_and_clear_bit(0, &ctx->irq_flags))
585 decon_enable_vblank(ctx->crtc);
586
587 decon_commit(ctx->crtc);
588 }
589
590 static void decon_disable(struct exynos_drm_crtc *crtc)
591 {
592 struct decon_context *ctx = crtc->ctx;
593 int i;
594
595 if (ctx->suspended)
596 return;
597
598 /*
599 * We need to make sure that all windows are disabled before we
600 * suspend that connector. Otherwise we might try to scan from
601 * a destroyed buffer later.
602 */
603 for (i = 0; i < WINDOWS_NR; i++)
604 decon_win_disable(crtc, i);
605
606 clk_disable_unprepare(ctx->vclk);
607 clk_disable_unprepare(ctx->eclk);
608 clk_disable_unprepare(ctx->aclk);
609 clk_disable_unprepare(ctx->pclk);
610
611 pm_runtime_put_sync(ctx->dev);
612
613 ctx->suspended = true;
614 }
615
616 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
617 .enable = decon_enable,
618 .disable = decon_disable,
619 .mode_fixup = decon_mode_fixup,
620 .commit = decon_commit,
621 .enable_vblank = decon_enable_vblank,
622 .disable_vblank = decon_disable_vblank,
623 .wait_for_vblank = decon_wait_for_vblank,
624 .win_commit = decon_win_commit,
625 .win_disable = decon_win_disable,
626 .clear_channels = decon_clear_channels,
627 };
628
629
630 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
631 {
632 struct decon_context *ctx = (struct decon_context *)dev_id;
633 u32 val, clear_bit;
634
635 val = readl(ctx->regs + VIDINTCON1);
636
637 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
638 if (val & clear_bit)
639 writel(clear_bit, ctx->regs + VIDINTCON1);
640
641 /* check the crtc is detached already from encoder */
642 if (ctx->pipe < 0 || !ctx->drm_dev)
643 goto out;
644
645 if (!ctx->i80_if) {
646 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
647 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
648
649 /* set wait vsync event to zero and wake up queue. */
650 if (atomic_read(&ctx->wait_vsync_event)) {
651 atomic_set(&ctx->wait_vsync_event, 0);
652 wake_up(&ctx->wait_vsync_queue);
653 }
654 }
655 out:
656 return IRQ_HANDLED;
657 }
658
659 static int decon_bind(struct device *dev, struct device *master, void *data)
660 {
661 struct decon_context *ctx = dev_get_drvdata(dev);
662 struct drm_device *drm_dev = data;
663 struct exynos_drm_plane *exynos_plane;
664 enum drm_plane_type type;
665 unsigned int zpos;
666 int ret;
667
668 ret = decon_ctx_initialize(ctx, drm_dev);
669 if (ret) {
670 DRM_ERROR("decon_ctx_initialize failed.\n");
671 return ret;
672 }
673
674 for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
675 type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
676 DRM_PLANE_TYPE_OVERLAY;
677 ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
678 1 << ctx->pipe, type, zpos);
679 if (ret)
680 return ret;
681 }
682
683 exynos_plane = &ctx->planes[ctx->default_win];
684 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
685 ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
686 &decon_crtc_ops, ctx);
687 if (IS_ERR(ctx->crtc)) {
688 decon_ctx_remove(ctx);
689 return PTR_ERR(ctx->crtc);
690 }
691
692 if (ctx->display)
693 exynos_drm_create_enc_conn(drm_dev, ctx->display);
694
695 return 0;
696
697 }
698
699 static void decon_unbind(struct device *dev, struct device *master,
700 void *data)
701 {
702 struct decon_context *ctx = dev_get_drvdata(dev);
703
704 decon_disable(ctx->crtc);
705
706 if (ctx->display)
707 exynos_dpi_remove(ctx->display);
708
709 decon_ctx_remove(ctx);
710 }
711
712 static const struct component_ops decon_component_ops = {
713 .bind = decon_bind,
714 .unbind = decon_unbind,
715 };
716
717 static int decon_probe(struct platform_device *pdev)
718 {
719 struct device *dev = &pdev->dev;
720 struct decon_context *ctx;
721 struct device_node *i80_if_timings;
722 struct resource *res;
723 int ret;
724
725 if (!dev->of_node)
726 return -ENODEV;
727
728 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
729 if (!ctx)
730 return -ENOMEM;
731
732 ctx->dev = dev;
733 ctx->suspended = true;
734
735 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
736 if (i80_if_timings)
737 ctx->i80_if = true;
738 of_node_put(i80_if_timings);
739
740 ctx->regs = of_iomap(dev->of_node, 0);
741 if (!ctx->regs)
742 return -ENOMEM;
743
744 ctx->pclk = devm_clk_get(dev, "pclk_decon0");
745 if (IS_ERR(ctx->pclk)) {
746 dev_err(dev, "failed to get bus clock pclk\n");
747 ret = PTR_ERR(ctx->pclk);
748 goto err_iounmap;
749 }
750
751 ctx->aclk = devm_clk_get(dev, "aclk_decon0");
752 if (IS_ERR(ctx->aclk)) {
753 dev_err(dev, "failed to get bus clock aclk\n");
754 ret = PTR_ERR(ctx->aclk);
755 goto err_iounmap;
756 }
757
758 ctx->eclk = devm_clk_get(dev, "decon0_eclk");
759 if (IS_ERR(ctx->eclk)) {
760 dev_err(dev, "failed to get eclock\n");
761 ret = PTR_ERR(ctx->eclk);
762 goto err_iounmap;
763 }
764
765 ctx->vclk = devm_clk_get(dev, "decon0_vclk");
766 if (IS_ERR(ctx->vclk)) {
767 dev_err(dev, "failed to get vclock\n");
768 ret = PTR_ERR(ctx->vclk);
769 goto err_iounmap;
770 }
771
772 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
773 ctx->i80_if ? "lcd_sys" : "vsync");
774 if (!res) {
775 dev_err(dev, "irq request failed.\n");
776 ret = -ENXIO;
777 goto err_iounmap;
778 }
779
780 ret = devm_request_irq(dev, res->start, decon_irq_handler,
781 0, "drm_decon", ctx);
782 if (ret) {
783 dev_err(dev, "irq request failed.\n");
784 goto err_iounmap;
785 }
786
787 init_waitqueue_head(&ctx->wait_vsync_queue);
788 atomic_set(&ctx->wait_vsync_event, 0);
789
790 platform_set_drvdata(pdev, ctx);
791
792 ctx->display = exynos_dpi_probe(dev);
793 if (IS_ERR(ctx->display)) {
794 ret = PTR_ERR(ctx->display);
795 goto err_iounmap;
796 }
797
798 pm_runtime_enable(dev);
799
800 ret = component_add(dev, &decon_component_ops);
801 if (ret)
802 goto err_disable_pm_runtime;
803
804 return ret;
805
806 err_disable_pm_runtime:
807 pm_runtime_disable(dev);
808
809 err_iounmap:
810 iounmap(ctx->regs);
811
812 return ret;
813 }
814
815 static int decon_remove(struct platform_device *pdev)
816 {
817 struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
818
819 pm_runtime_disable(&pdev->dev);
820
821 iounmap(ctx->regs);
822
823 component_del(&pdev->dev, &decon_component_ops);
824
825 return 0;
826 }
827
828 struct platform_driver decon_driver = {
829 .probe = decon_probe,
830 .remove = decon_remove,
831 .driver = {
832 .name = "exynos-decon",
833 .of_match_table = decon_driver_dt_match,
834 },
835 };
Linux kernel - Deliverables
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