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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* drivers/gpu/drm/exynos/exynos7_drm_decon.c
3 *
4 * Copyright (C) 2014 Samsung Electronics Co.Ltd
5 * Authors:
6 * Akshu Agarwal <akshua@gmail.com>
7 * Ajay Kumar <ajaykumar.rs@samsung.com>
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/platform_device.h>
16#include <linux/pm_runtime.h>
17
18#include <video/of_display_timing.h>
19#include <video/of_videomode.h>
20
21#include <drm/drm_fourcc.h>
22#include <drm/drm_framebuffer.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 * DECON stands for Display and Enhancement controller.
34 */
35
36#define MIN_FB_WIDTH_FOR_16WORD_BURST 128
37
38#define WINDOWS_NR 2
39
40struct decon_data {
41 unsigned int vidw_buf_start_base;
42 unsigned int shadowcon_win_protect_shift;
43 unsigned int wincon_burstlen_shift;
44};
45
46static struct decon_data exynos7_decon_data = {
47 .vidw_buf_start_base = 0x80,
48 .shadowcon_win_protect_shift = 10,
49 .wincon_burstlen_shift = 11,
50};
51
52static struct decon_data exynos7870_decon_data = {
53 .vidw_buf_start_base = 0x880,
54 .shadowcon_win_protect_shift = 8,
55 .wincon_burstlen_shift = 10,
56};
57
58struct decon_context {
59 struct device *dev;
60 struct drm_device *drm_dev;
61 void *dma_priv;
62 struct exynos_drm_crtc *crtc;
63 struct exynos_drm_plane planes[WINDOWS_NR];
64 struct exynos_drm_plane_config configs[WINDOWS_NR];
65 struct clk *pclk;
66 struct clk *aclk;
67 struct clk *eclk;
68 struct clk *vclk;
69 void __iomem *regs;
70 unsigned long irq_flags;
71 bool i80_if;
72 bool suspended;
73 wait_queue_head_t wait_vsync_queue;
74 atomic_t wait_vsync_event;
75
76 const struct decon_data *data;
77 struct drm_encoder *encoder;
78};
79
80static const struct of_device_id decon_driver_dt_match[] = {
81 {
82 .compatible = "samsung,exynos7-decon",
83 .data = &exynos7_decon_data,
84 },
85 {
86 .compatible = "samsung,exynos7870-decon",
87 .data = &exynos7870_decon_data,
88 },
89 {},
90};
91MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
92
93static const uint32_t decon_formats[] = {
94 DRM_FORMAT_RGB565,
95 DRM_FORMAT_XRGB8888,
96 DRM_FORMAT_XBGR8888,
97 DRM_FORMAT_RGBX8888,
98 DRM_FORMAT_BGRX8888,
99 DRM_FORMAT_ARGB8888,
100 DRM_FORMAT_ABGR8888,
101 DRM_FORMAT_RGBA8888,
102 DRM_FORMAT_BGRA8888,
103};
104
105static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
106 DRM_PLANE_TYPE_PRIMARY,
107 DRM_PLANE_TYPE_CURSOR,
108};
109
110/**
111 * decon_shadow_protect_win() - disable updating values from shadow registers at vsync
112 *
113 * @ctx: display and enhancement controller context
114 * @win: window to protect registers for
115 * @protect: 1 to protect (disable updates)
116 */
117static void decon_shadow_protect_win(struct decon_context *ctx,
118 unsigned int win, bool protect)
119{
120 u32 bits, val;
121 unsigned int shift = ctx->data->shadowcon_win_protect_shift;
122
123 bits = SHADOWCON_WINx_PROTECT(shift, win);
124
125 val = readl(ctx->regs + SHADOWCON);
126 if (protect)
127 val |= bits;
128 else
129 val &= ~bits;
130 writel(val, ctx->regs + SHADOWCON);
131}
132
133static void decon_wait_for_vblank(struct decon_context *ctx)
134{
135 if (ctx->suspended)
136 return;
137
138 atomic_set(&ctx->wait_vsync_event, 1);
139
140 /*
141 * wait for DECON to signal VSYNC interrupt or return after
142 * timeout which is set to 50ms (refresh rate of 20).
143 */
144 if (!wait_event_timeout(ctx->wait_vsync_queue,
145 !atomic_read(&ctx->wait_vsync_event),
146 HZ/20))
147 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
148}
149
150static void decon_clear_channels(struct decon_context *ctx)
151{
152 unsigned int win, ch_enabled = 0;
153 u32 val;
154
155 /* Check if any channel is enabled. */
156 for (win = 0; win < WINDOWS_NR; win++) {
157 val = readl(ctx->regs + WINCON(win));
158
159 if (val & WINCONx_ENWIN) {
160 decon_shadow_protect_win(ctx, win, true);
161
162 val &= ~WINCONx_ENWIN;
163 writel(val, ctx->regs + WINCON(win));
164 ch_enabled = 1;
165
166 decon_shadow_protect_win(ctx, win, false);
167 }
168 }
169
170 val = readl(ctx->regs + DECON_UPDATE);
171 val |= DECON_UPDATE_STANDALONE_F;
172 writel(val, ctx->regs + DECON_UPDATE);
173
174 /* Wait for vsync, as disable channel takes effect at next vsync */
175 if (ch_enabled)
176 decon_wait_for_vblank(ctx);
177}
178
179static int decon_ctx_initialize(struct decon_context *ctx,
180 struct drm_device *drm_dev)
181{
182 ctx->drm_dev = drm_dev;
183
184 decon_clear_channels(ctx);
185
186 return exynos_drm_register_dma(drm_dev, ctx->dev, &ctx->dma_priv);
187}
188
189static void decon_ctx_remove(struct decon_context *ctx)
190{
191 /* detach this sub driver from iommu mapping if supported. */
192 exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv);
193}
194
195static u32 decon_calc_clkdiv(struct decon_context *ctx,
196 const struct drm_display_mode *mode)
197{
198 unsigned long ideal_clk = mode->clock * 1000;
199 u32 clkdiv;
200
201 /* Find the clock divider value that gets us closest to ideal_clk */
202 clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
203
204 return (clkdiv < 0x100) ? clkdiv : 0xff;
205}
206
207static void decon_commit(struct exynos_drm_crtc *crtc)
208{
209 struct decon_context *ctx = crtc->ctx;
210 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
211 u32 val, clkdiv;
212
213 if (ctx->suspended)
214 return;
215
216 /* nothing to do if we haven't set the mode yet */
217 if (mode->htotal == 0 || mode->vtotal == 0)
218 return;
219
220 if (!ctx->i80_if) {
221 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
222 /* setup vertical timing values. */
223 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
224 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
225 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
226
227 val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);
228 writel(val, ctx->regs + VIDTCON0);
229
230 val = VIDTCON1_VSPW(vsync_len - 1);
231 writel(val, ctx->regs + VIDTCON1);
232
233 /* setup horizontal timing values. */
234 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
235 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
236 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
237
238 /* setup horizontal timing values. */
239 val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
240 writel(val, ctx->regs + VIDTCON2);
241
242 val = VIDTCON3_HSPW(hsync_len - 1);
243 writel(val, ctx->regs + VIDTCON3);
244 }
245
246 /* setup horizontal and vertical display size. */
247 val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
248 VIDTCON4_HOZVAL(mode->hdisplay - 1);
249 writel(val, ctx->regs + VIDTCON4);
250
251 writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
252
253 /*
254 * fields of register with prefix '_F' would be updated
255 * at vsync(same as dma start)
256 */
257 val = VIDCON0_ENVID | VIDCON0_ENVID_F;
258 writel(val, ctx->regs + VIDCON0);
259
260 clkdiv = decon_calc_clkdiv(ctx, mode);
261 if (clkdiv > 1) {
262 val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
263 writel(val, ctx->regs + VCLKCON1);
264 writel(val, ctx->regs + VCLKCON2);
265 }
266
267 val = readl(ctx->regs + DECON_UPDATE);
268 val |= DECON_UPDATE_STANDALONE_F;
269 writel(val, ctx->regs + DECON_UPDATE);
270}
271
272static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
273{
274 struct decon_context *ctx = crtc->ctx;
275 u32 val;
276
277 if (ctx->suspended)
278 return -EPERM;
279
280 if (!test_and_set_bit(0, &ctx->irq_flags)) {
281 val = readl(ctx->regs + VIDINTCON0);
282
283 val |= VIDINTCON0_INT_ENABLE;
284
285 if (!ctx->i80_if) {
286 val |= VIDINTCON0_INT_FRAME;
287 val &= ~VIDINTCON0_FRAMESEL0_MASK;
288 val |= VIDINTCON0_FRAMESEL0_VSYNC;
289 }
290
291 writel(val, ctx->regs + VIDINTCON0);
292 }
293
294 return 0;
295}
296
297static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
298{
299 struct decon_context *ctx = crtc->ctx;
300 u32 val;
301
302 if (ctx->suspended)
303 return;
304
305 if (test_and_clear_bit(0, &ctx->irq_flags)) {
306 val = readl(ctx->regs + VIDINTCON0);
307
308 val &= ~VIDINTCON0_INT_ENABLE;
309 if (!ctx->i80_if)
310 val &= ~VIDINTCON0_INT_FRAME;
311
312 writel(val, ctx->regs + VIDINTCON0);
313 }
314}
315
316static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
317 struct drm_framebuffer *fb)
318{
319 unsigned long val;
320 int padding;
321 unsigned int shift = ctx->data->wincon_burstlen_shift;
322
323 val = readl(ctx->regs + WINCON(win));
324 val &= ~WINCONx_BPPMODE_MASK;
325
326 switch (fb->format->format) {
327 case DRM_FORMAT_RGB565:
328 val |= WINCONx_BPPMODE_16BPP_565;
329 val |= WINCONx_BURSTLEN_16WORD(shift);
330 break;
331 case DRM_FORMAT_XRGB8888:
332 val |= WINCONx_BPPMODE_24BPP_xRGB;
333 val |= WINCONx_BURSTLEN_16WORD(shift);
334 break;
335 case DRM_FORMAT_XBGR8888:
336 val |= WINCONx_BPPMODE_24BPP_xBGR;
337 val |= WINCONx_BURSTLEN_16WORD(shift);
338 break;
339 case DRM_FORMAT_RGBX8888:
340 val |= WINCONx_BPPMODE_24BPP_RGBx;
341 val |= WINCONx_BURSTLEN_16WORD(shift);
342 break;
343 case DRM_FORMAT_BGRX8888:
344 val |= WINCONx_BPPMODE_24BPP_BGRx;
345 val |= WINCONx_BURSTLEN_16WORD(shift);
346 break;
347 case DRM_FORMAT_ARGB8888:
348 val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
349 WINCONx_ALPHA_SEL;
350 val |= WINCONx_BURSTLEN_16WORD(shift);
351 break;
352 case DRM_FORMAT_ABGR8888:
353 val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
354 WINCONx_ALPHA_SEL;
355 val |= WINCONx_BURSTLEN_16WORD(shift);
356 break;
357 case DRM_FORMAT_RGBA8888:
358 val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
359 WINCONx_ALPHA_SEL;
360 val |= WINCONx_BURSTLEN_16WORD(shift);
361 break;
362 case DRM_FORMAT_BGRA8888:
363 default:
364 val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
365 WINCONx_ALPHA_SEL;
366 val |= WINCONx_BURSTLEN_16WORD(shift);
367 break;
368 }
369
370 DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]);
371
372 /*
373 * In case of exynos, setting dma-burst to 16Word causes permanent
374 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
375 * switching which is based on plane size is not recommended as
376 * plane size varies a lot towards the end of the screen and rapid
377 * movement causes unstable DMA which results into iommu crash/tear.
378 */
379
380 padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width;
381 if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {
382 val &= ~WINCONx_BURSTLEN_MASK(shift);
383 val |= WINCONx_BURSTLEN_8WORD(shift);
384 }
385
386 writel(val, ctx->regs + WINCON(win));
387}
388
389static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
390{
391 unsigned int keycon0 = 0, keycon1 = 0;
392
393 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
394 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
395
396 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
397
398 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
399 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
400}
401
402static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
403{
404 struct decon_context *ctx = crtc->ctx;
405 int i;
406
407 if (ctx->suspended)
408 return;
409
410 for (i = 0; i < WINDOWS_NR; i++)
411 decon_shadow_protect_win(ctx, i, true);
412}
413
414static void decon_update_plane(struct exynos_drm_crtc *crtc,
415 struct exynos_drm_plane *plane)
416{
417 struct exynos_drm_plane_state *state =
418 to_exynos_plane_state(plane->base.state);
419 struct decon_context *ctx = crtc->ctx;
420 struct drm_framebuffer *fb = state->base.fb;
421 int padding;
422 unsigned long val, alpha;
423 unsigned int last_x;
424 unsigned int last_y;
425 unsigned int win = plane->index;
426 unsigned int cpp = fb->format->cpp[0];
427 unsigned int pitch = fb->pitches[0];
428 unsigned int vidw_addr0_base = ctx->data->vidw_buf_start_base;
429
430 if (ctx->suspended)
431 return;
432
433 /*
434 * SHADOWCON/PRTCON register is used for enabling timing.
435 *
436 * for example, once only width value of a register is set,
437 * if the dma is started then decon hardware could malfunction so
438 * with protect window setting, the register fields with prefix '_F'
439 * wouldn't be updated at vsync also but updated once unprotect window
440 * is set.
441 */
442
443 /* buffer start address */
444 val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0);
445 writel(val, ctx->regs + VIDW_BUF_START(vidw_addr0_base, win));
446
447 padding = (pitch / cpp) - fb->width;
448
449 /* buffer size */
450 writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));
451 writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win));
452
453 /* offset from the start of the buffer to read */
454 writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win));
455 writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win));
456
457 DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n",
458 (unsigned long)val);
459 DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
460 state->crtc.w, state->crtc.h);
461
462 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
463 VIDOSDxA_TOPLEFT_Y(state->crtc.y);
464 writel(val, ctx->regs + VIDOSD_A(win));
465
466 last_x = state->crtc.x + state->crtc.w;
467 if (last_x)
468 last_x--;
469 last_y = state->crtc.y + state->crtc.h;
470 if (last_y)
471 last_y--;
472
473 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y);
474
475 writel(val, ctx->regs + VIDOSD_B(win));
476
477 DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
478 state->crtc.x, state->crtc.y, last_x, last_y);
479
480 /* OSD alpha */
481 alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
482 VIDOSDxC_ALPHA0_G_F(0x0) |
483 VIDOSDxC_ALPHA0_B_F(0x0);
484
485 writel(alpha, ctx->regs + VIDOSD_C(win));
486
487 alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
488 VIDOSDxD_ALPHA1_G_F(0xff) |
489 VIDOSDxD_ALPHA1_B_F(0xff);
490
491 writel(alpha, ctx->regs + VIDOSD_D(win));
492
493 decon_win_set_pixfmt(ctx, win, fb);
494
495 /* hardware window 0 doesn't support color key. */
496 if (win != 0)
497 decon_win_set_colkey(ctx, win);
498
499 /* wincon */
500 val = readl(ctx->regs + WINCON(win));
501 val |= WINCONx_TRIPLE_BUF_MODE;
502 val |= WINCONx_ENWIN;
503 writel(val, ctx->regs + WINCON(win));
504
505 /* Enable DMA channel and unprotect windows */
506 decon_shadow_protect_win(ctx, win, false);
507
508 val = readl(ctx->regs + DECON_UPDATE);
509 val |= DECON_UPDATE_STANDALONE_F;
510 writel(val, ctx->regs + DECON_UPDATE);
511}
512
513static void decon_disable_plane(struct exynos_drm_crtc *crtc,
514 struct exynos_drm_plane *plane)
515{
516 struct decon_context *ctx = crtc->ctx;
517 unsigned int win = plane->index;
518 u32 val;
519
520 if (ctx->suspended)
521 return;
522
523 /* protect windows */
524 decon_shadow_protect_win(ctx, win, true);
525
526 /* wincon */
527 val = readl(ctx->regs + WINCON(win));
528 val &= ~WINCONx_ENWIN;
529 writel(val, ctx->regs + WINCON(win));
530
531 val = readl(ctx->regs + DECON_UPDATE);
532 val |= DECON_UPDATE_STANDALONE_F;
533 writel(val, ctx->regs + DECON_UPDATE);
534}
535
536static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
537{
538 struct decon_context *ctx = crtc->ctx;
539 int i;
540
541 if (ctx->suspended)
542 return;
543
544 for (i = 0; i < WINDOWS_NR; i++)
545 decon_shadow_protect_win(ctx, i, false);
546 exynos_crtc_handle_event(crtc);
547}
548
549static void decon_init(struct decon_context *ctx)
550{
551 u32 val;
552
553 writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
554
555 val = VIDOUTCON0_DISP_IF_0_ON;
556 if (!ctx->i80_if)
557 val |= VIDOUTCON0_RGBIF;
558 writel(val, ctx->regs + VIDOUTCON0);
559
560 writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
561
562 if (!ctx->i80_if)
563 writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
564}
565
566static void decon_atomic_enable(struct exynos_drm_crtc *crtc)
567{
568 struct decon_context *ctx = crtc->ctx;
569 int ret;
570
571 if (!ctx->suspended)
572 return;
573
574 ret = pm_runtime_resume_and_get(ctx->dev);
575 if (ret < 0) {
576 DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n");
577 return;
578 }
579
580 decon_init(ctx);
581
582 /* if vblank was enabled status, enable it again. */
583 if (test_and_clear_bit(0, &ctx->irq_flags))
584 decon_enable_vblank(ctx->crtc);
585
586 decon_commit(ctx->crtc);
587
588 ctx->suspended = false;
589}
590
591static void decon_atomic_disable(struct exynos_drm_crtc *crtc)
592{
593 struct decon_context *ctx = crtc->ctx;
594 int i;
595
596 if (ctx->suspended)
597 return;
598
599 /*
600 * We need to make sure that all windows are disabled before we
601 * suspend that connector. Otherwise we might try to scan from
602 * a destroyed buffer later.
603 */
604 for (i = 0; i < WINDOWS_NR; i++)
605 decon_disable_plane(crtc, &ctx->planes[i]);
606
607 pm_runtime_put_sync(ctx->dev);
608
609 ctx->suspended = true;
610}
611
612static const struct exynos_drm_crtc_ops decon_crtc_ops = {
613 .atomic_enable = decon_atomic_enable,
614 .atomic_disable = decon_atomic_disable,
615 .enable_vblank = decon_enable_vblank,
616 .disable_vblank = decon_disable_vblank,
617 .atomic_begin = decon_atomic_begin,
618 .update_plane = decon_update_plane,
619 .disable_plane = decon_disable_plane,
620 .atomic_flush = decon_atomic_flush,
621};
622
623
624static irqreturn_t decon_irq_handler(int irq, void *dev_id)
625{
626 struct decon_context *ctx = (struct decon_context *)dev_id;
627 u32 val, clear_bit;
628
629 val = readl(ctx->regs + VIDINTCON1);
630
631 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
632 if (val & clear_bit)
633 writel(clear_bit, ctx->regs + VIDINTCON1);
634
635 /* check the crtc is detached already from encoder */
636 if (!ctx->drm_dev)
637 goto out;
638
639 if (!ctx->i80_if) {
640 drm_crtc_handle_vblank(&ctx->crtc->base);
641
642 /* set wait vsync event to zero and wake up queue. */
643 if (atomic_read(&ctx->wait_vsync_event)) {
644 atomic_set(&ctx->wait_vsync_event, 0);
645 wake_up(&ctx->wait_vsync_queue);
646 }
647 }
648out:
649 return IRQ_HANDLED;
650}
651
652static int decon_bind(struct device *dev, struct device *master, void *data)
653{
654 struct decon_context *ctx = dev_get_drvdata(dev);
655 struct drm_device *drm_dev = data;
656 struct exynos_drm_plane *exynos_plane;
657 unsigned int i;
658 int ret;
659
660 ret = decon_ctx_initialize(ctx, drm_dev);
661 if (ret) {
662 DRM_DEV_ERROR(dev, "decon_ctx_initialize failed.\n");
663 return ret;
664 }
665
666 for (i = 0; i < WINDOWS_NR; i++) {
667 ctx->configs[i].pixel_formats = decon_formats;
668 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats);
669 ctx->configs[i].zpos = i;
670 ctx->configs[i].type = decon_win_types[i];
671
672 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
673 &ctx->configs[i]);
674 if (ret)
675 return ret;
676 }
677
678 exynos_plane = &ctx->planes[DEFAULT_WIN];
679 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
680 EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx);
681 if (IS_ERR(ctx->crtc)) {
682 decon_ctx_remove(ctx);
683 return PTR_ERR(ctx->crtc);
684 }
685
686 if (ctx->encoder)
687 exynos_dpi_bind(drm_dev, ctx->encoder);
688
689 return 0;
690
691}
692
693static void decon_unbind(struct device *dev, struct device *master,
694 void *data)
695{
696 struct decon_context *ctx = dev_get_drvdata(dev);
697
698 decon_atomic_disable(ctx->crtc);
699
700 if (ctx->encoder)
701 exynos_dpi_remove(ctx->encoder);
702
703 decon_ctx_remove(ctx);
704}
705
706static const struct component_ops decon_component_ops = {
707 .bind = decon_bind,
708 .unbind = decon_unbind,
709};
710
711static int decon_probe(struct platform_device *pdev)
712{
713 struct device *dev = &pdev->dev;
714 struct decon_context *ctx;
715 struct device_node *i80_if_timings;
716 int ret;
717
718 if (!dev->of_node)
719 return -ENODEV;
720
721 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
722 if (!ctx)
723 return -ENOMEM;
724
725 ctx->dev = dev;
726 ctx->suspended = true;
727 ctx->data = of_device_get_match_data(dev);
728
729 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
730 if (i80_if_timings)
731 ctx->i80_if = true;
732 of_node_put(i80_if_timings);
733
734 ctx->regs = of_iomap(dev->of_node, 0);
735 if (!ctx->regs)
736 return -ENOMEM;
737
738 ctx->pclk = devm_clk_get(dev, "pclk_decon0");
739 if (IS_ERR(ctx->pclk)) {
740 dev_err(dev, "failed to get bus clock pclk\n");
741 ret = PTR_ERR(ctx->pclk);
742 goto err_iounmap;
743 }
744
745 ctx->aclk = devm_clk_get(dev, "aclk_decon0");
746 if (IS_ERR(ctx->aclk)) {
747 dev_err(dev, "failed to get bus clock aclk\n");
748 ret = PTR_ERR(ctx->aclk);
749 goto err_iounmap;
750 }
751
752 ctx->eclk = devm_clk_get(dev, "decon0_eclk");
753 if (IS_ERR(ctx->eclk)) {
754 dev_err(dev, "failed to get eclock\n");
755 ret = PTR_ERR(ctx->eclk);
756 goto err_iounmap;
757 }
758
759 ctx->vclk = devm_clk_get(dev, "decon0_vclk");
760 if (IS_ERR(ctx->vclk)) {
761 dev_err(dev, "failed to get vclock\n");
762 ret = PTR_ERR(ctx->vclk);
763 goto err_iounmap;
764 }
765
766 ret = platform_get_irq_byname(pdev, ctx->i80_if ? "lcd_sys" : "vsync");
767 if (ret < 0)
768 goto err_iounmap;
769
770 ret = devm_request_irq(dev, ret, decon_irq_handler, 0, "drm_decon", ctx);
771 if (ret) {
772 dev_err(dev, "irq request failed.\n");
773 goto err_iounmap;
774 }
775
776 init_waitqueue_head(&ctx->wait_vsync_queue);
777 atomic_set(&ctx->wait_vsync_event, 0);
778
779 platform_set_drvdata(pdev, ctx);
780
781 ctx->encoder = exynos_dpi_probe(dev);
782 if (IS_ERR(ctx->encoder)) {
783 ret = PTR_ERR(ctx->encoder);
784 goto err_iounmap;
785 }
786
787 pm_runtime_enable(dev);
788
789 ret = component_add(dev, &decon_component_ops);
790 if (ret)
791 goto err_disable_pm_runtime;
792
793 return ret;
794
795err_disable_pm_runtime:
796 pm_runtime_disable(dev);
797
798err_iounmap:
799 iounmap(ctx->regs);
800
801 return ret;
802}
803
804static void decon_remove(struct platform_device *pdev)
805{
806 struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
807
808 pm_runtime_disable(&pdev->dev);
809
810 iounmap(ctx->regs);
811
812 component_del(&pdev->dev, &decon_component_ops);
813}
814
815static int exynos7_decon_suspend(struct device *dev)
816{
817 struct decon_context *ctx = dev_get_drvdata(dev);
818
819 clk_disable_unprepare(ctx->vclk);
820 clk_disable_unprepare(ctx->eclk);
821 clk_disable_unprepare(ctx->aclk);
822 clk_disable_unprepare(ctx->pclk);
823
824 return 0;
825}
826
827static int exynos7_decon_resume(struct device *dev)
828{
829 struct decon_context *ctx = dev_get_drvdata(dev);
830 int ret;
831
832 ret = clk_prepare_enable(ctx->pclk);
833 if (ret < 0) {
834 DRM_DEV_ERROR(dev, "Failed to prepare_enable the pclk [%d]\n",
835 ret);
836 goto err_pclk_enable;
837 }
838
839 ret = clk_prepare_enable(ctx->aclk);
840 if (ret < 0) {
841 DRM_DEV_ERROR(dev, "Failed to prepare_enable the aclk [%d]\n",
842 ret);
843 goto err_aclk_enable;
844 }
845
846 ret = clk_prepare_enable(ctx->eclk);
847 if (ret < 0) {
848 DRM_DEV_ERROR(dev, "Failed to prepare_enable the eclk [%d]\n",
849 ret);
850 goto err_eclk_enable;
851 }
852
853 ret = clk_prepare_enable(ctx->vclk);
854 if (ret < 0) {
855 DRM_DEV_ERROR(dev, "Failed to prepare_enable the vclk [%d]\n",
856 ret);
857 goto err_vclk_enable;
858 }
859
860 return 0;
861
862err_vclk_enable:
863 clk_disable_unprepare(ctx->eclk);
864err_eclk_enable:
865 clk_disable_unprepare(ctx->aclk);
866err_aclk_enable:
867 clk_disable_unprepare(ctx->pclk);
868err_pclk_enable:
869 return ret;
870}
871
872static DEFINE_RUNTIME_DEV_PM_OPS(exynos7_decon_pm_ops, exynos7_decon_suspend,
873 exynos7_decon_resume, NULL);
874
875struct platform_driver decon_driver = {
876 .probe = decon_probe,
877 .remove = decon_remove,
878 .driver = {
879 .name = "exynos-decon",
880 .pm = pm_ptr(&exynos7_decon_pm_ops),
881 .of_match_table = decon_driver_dt_match,
882 },
883};
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* drivers/gpu/drm/exynos/exynos7_drm_decon.c
3 *
4 * Copyright (C) 2014 Samsung Electronics Co.Ltd
5 * Authors:
6 * Akshu Agarwal <akshua@gmail.com>
7 * Ajay Kumar <ajaykumar.rs@samsung.com>
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 * DECON stands for Display and Enhancement controller.
34 */
35
36#define MIN_FB_WIDTH_FOR_16WORD_BURST 128
37
38#define WINDOWS_NR 2
39
40struct decon_context {
41 struct device *dev;
42 struct drm_device *drm_dev;
43 struct exynos_drm_crtc *crtc;
44 struct exynos_drm_plane planes[WINDOWS_NR];
45 struct exynos_drm_plane_config configs[WINDOWS_NR];
46 struct clk *pclk;
47 struct clk *aclk;
48 struct clk *eclk;
49 struct clk *vclk;
50 void __iomem *regs;
51 unsigned long irq_flags;
52 bool i80_if;
53 bool suspended;
54 wait_queue_head_t wait_vsync_queue;
55 atomic_t wait_vsync_event;
56
57 struct drm_encoder *encoder;
58};
59
60static const struct of_device_id decon_driver_dt_match[] = {
61 {.compatible = "samsung,exynos7-decon"},
62 {},
63};
64MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
65
66static const uint32_t decon_formats[] = {
67 DRM_FORMAT_RGB565,
68 DRM_FORMAT_XRGB8888,
69 DRM_FORMAT_XBGR8888,
70 DRM_FORMAT_RGBX8888,
71 DRM_FORMAT_BGRX8888,
72 DRM_FORMAT_ARGB8888,
73 DRM_FORMAT_ABGR8888,
74 DRM_FORMAT_RGBA8888,
75 DRM_FORMAT_BGRA8888,
76};
77
78static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
79 DRM_PLANE_TYPE_PRIMARY,
80 DRM_PLANE_TYPE_CURSOR,
81};
82
83static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
84{
85 struct decon_context *ctx = crtc->ctx;
86
87 if (ctx->suspended)
88 return;
89
90 atomic_set(&ctx->wait_vsync_event, 1);
91
92 /*
93 * wait for DECON to signal VSYNC interrupt or return after
94 * timeout which is set to 50ms (refresh rate of 20).
95 */
96 if (!wait_event_timeout(ctx->wait_vsync_queue,
97 !atomic_read(&ctx->wait_vsync_event),
98 HZ/20))
99 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
100}
101
102static void decon_clear_channels(struct exynos_drm_crtc *crtc)
103{
104 struct decon_context *ctx = crtc->ctx;
105 unsigned int win, ch_enabled = 0;
106
107 /* Check if any channel is enabled. */
108 for (win = 0; win < WINDOWS_NR; win++) {
109 u32 val = readl(ctx->regs + WINCON(win));
110
111 if (val & WINCONx_ENWIN) {
112 val &= ~WINCONx_ENWIN;
113 writel(val, ctx->regs + WINCON(win));
114 ch_enabled = 1;
115 }
116 }
117
118 /* Wait for vsync, as disable channel takes effect at next vsync */
119 if (ch_enabled)
120 decon_wait_for_vblank(ctx->crtc);
121}
122
123static int decon_ctx_initialize(struct decon_context *ctx,
124 struct drm_device *drm_dev)
125{
126 ctx->drm_dev = drm_dev;
127
128 decon_clear_channels(ctx->crtc);
129
130 return exynos_drm_register_dma(drm_dev, ctx->dev);
131}
132
133static void decon_ctx_remove(struct decon_context *ctx)
134{
135 /* detach this sub driver from iommu mapping if supported. */
136 exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev);
137}
138
139static u32 decon_calc_clkdiv(struct decon_context *ctx,
140 const struct drm_display_mode *mode)
141{
142 unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
143 u32 clkdiv;
144
145 /* Find the clock divider value that gets us closest to ideal_clk */
146 clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
147
148 return (clkdiv < 0x100) ? clkdiv : 0xff;
149}
150
151static void decon_commit(struct exynos_drm_crtc *crtc)
152{
153 struct decon_context *ctx = crtc->ctx;
154 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
155 u32 val, clkdiv;
156
157 if (ctx->suspended)
158 return;
159
160 /* nothing to do if we haven't set the mode yet */
161 if (mode->htotal == 0 || mode->vtotal == 0)
162 return;
163
164 if (!ctx->i80_if) {
165 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
166 /* setup vertical timing values. */
167 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
168 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
169 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
170
171 val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);
172 writel(val, ctx->regs + VIDTCON0);
173
174 val = VIDTCON1_VSPW(vsync_len - 1);
175 writel(val, ctx->regs + VIDTCON1);
176
177 /* setup horizontal timing values. */
178 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
179 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
180 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
181
182 /* setup horizontal timing values. */
183 val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
184 writel(val, ctx->regs + VIDTCON2);
185
186 val = VIDTCON3_HSPW(hsync_len - 1);
187 writel(val, ctx->regs + VIDTCON3);
188 }
189
190 /* setup horizontal and vertical display size. */
191 val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
192 VIDTCON4_HOZVAL(mode->hdisplay - 1);
193 writel(val, ctx->regs + VIDTCON4);
194
195 writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
196
197 /*
198 * fields of register with prefix '_F' would be updated
199 * at vsync(same as dma start)
200 */
201 val = VIDCON0_ENVID | VIDCON0_ENVID_F;
202 writel(val, ctx->regs + VIDCON0);
203
204 clkdiv = decon_calc_clkdiv(ctx, mode);
205 if (clkdiv > 1) {
206 val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
207 writel(val, ctx->regs + VCLKCON1);
208 writel(val, ctx->regs + VCLKCON2);
209 }
210
211 val = readl(ctx->regs + DECON_UPDATE);
212 val |= DECON_UPDATE_STANDALONE_F;
213 writel(val, ctx->regs + DECON_UPDATE);
214}
215
216static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
217{
218 struct decon_context *ctx = crtc->ctx;
219 u32 val;
220
221 if (ctx->suspended)
222 return -EPERM;
223
224 if (!test_and_set_bit(0, &ctx->irq_flags)) {
225 val = readl(ctx->regs + VIDINTCON0);
226
227 val |= VIDINTCON0_INT_ENABLE;
228
229 if (!ctx->i80_if) {
230 val |= VIDINTCON0_INT_FRAME;
231 val &= ~VIDINTCON0_FRAMESEL0_MASK;
232 val |= VIDINTCON0_FRAMESEL0_VSYNC;
233 }
234
235 writel(val, ctx->regs + VIDINTCON0);
236 }
237
238 return 0;
239}
240
241static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
242{
243 struct decon_context *ctx = crtc->ctx;
244 u32 val;
245
246 if (ctx->suspended)
247 return;
248
249 if (test_and_clear_bit(0, &ctx->irq_flags)) {
250 val = readl(ctx->regs + VIDINTCON0);
251
252 val &= ~VIDINTCON0_INT_ENABLE;
253 if (!ctx->i80_if)
254 val &= ~VIDINTCON0_INT_FRAME;
255
256 writel(val, ctx->regs + VIDINTCON0);
257 }
258}
259
260static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
261 struct drm_framebuffer *fb)
262{
263 unsigned long val;
264 int padding;
265
266 val = readl(ctx->regs + WINCON(win));
267 val &= ~WINCONx_BPPMODE_MASK;
268
269 switch (fb->format->format) {
270 case DRM_FORMAT_RGB565:
271 val |= WINCONx_BPPMODE_16BPP_565;
272 val |= WINCONx_BURSTLEN_16WORD;
273 break;
274 case DRM_FORMAT_XRGB8888:
275 val |= WINCONx_BPPMODE_24BPP_xRGB;
276 val |= WINCONx_BURSTLEN_16WORD;
277 break;
278 case DRM_FORMAT_XBGR8888:
279 val |= WINCONx_BPPMODE_24BPP_xBGR;
280 val |= WINCONx_BURSTLEN_16WORD;
281 break;
282 case DRM_FORMAT_RGBX8888:
283 val |= WINCONx_BPPMODE_24BPP_RGBx;
284 val |= WINCONx_BURSTLEN_16WORD;
285 break;
286 case DRM_FORMAT_BGRX8888:
287 val |= WINCONx_BPPMODE_24BPP_BGRx;
288 val |= WINCONx_BURSTLEN_16WORD;
289 break;
290 case DRM_FORMAT_ARGB8888:
291 val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
292 WINCONx_ALPHA_SEL;
293 val |= WINCONx_BURSTLEN_16WORD;
294 break;
295 case DRM_FORMAT_ABGR8888:
296 val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
297 WINCONx_ALPHA_SEL;
298 val |= WINCONx_BURSTLEN_16WORD;
299 break;
300 case DRM_FORMAT_RGBA8888:
301 val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
302 WINCONx_ALPHA_SEL;
303 val |= WINCONx_BURSTLEN_16WORD;
304 break;
305 case DRM_FORMAT_BGRA8888:
306 default:
307 val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
308 WINCONx_ALPHA_SEL;
309 val |= WINCONx_BURSTLEN_16WORD;
310 break;
311 }
312
313 DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]);
314
315 /*
316 * In case of exynos, setting dma-burst to 16Word causes permanent
317 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
318 * switching which is based on plane size is not recommended as
319 * plane size varies a lot towards the end of the screen and rapid
320 * movement causes unstable DMA which results into iommu crash/tear.
321 */
322
323 padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width;
324 if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {
325 val &= ~WINCONx_BURSTLEN_MASK;
326 val |= WINCONx_BURSTLEN_8WORD;
327 }
328
329 writel(val, ctx->regs + WINCON(win));
330}
331
332static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
333{
334 unsigned int keycon0 = 0, keycon1 = 0;
335
336 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
337 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
338
339 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
340
341 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
342 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
343}
344
345/**
346 * shadow_protect_win() - disable updating values from shadow registers at vsync
347 *
348 * @win: window to protect registers for
349 * @protect: 1 to protect (disable updates)
350 */
351static void decon_shadow_protect_win(struct decon_context *ctx,
352 unsigned int win, bool protect)
353{
354 u32 bits, val;
355
356 bits = SHADOWCON_WINx_PROTECT(win);
357
358 val = readl(ctx->regs + SHADOWCON);
359 if (protect)
360 val |= bits;
361 else
362 val &= ~bits;
363 writel(val, ctx->regs + SHADOWCON);
364}
365
366static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
367{
368 struct decon_context *ctx = crtc->ctx;
369 int i;
370
371 if (ctx->suspended)
372 return;
373
374 for (i = 0; i < WINDOWS_NR; i++)
375 decon_shadow_protect_win(ctx, i, true);
376}
377
378static void decon_update_plane(struct exynos_drm_crtc *crtc,
379 struct exynos_drm_plane *plane)
380{
381 struct exynos_drm_plane_state *state =
382 to_exynos_plane_state(plane->base.state);
383 struct decon_context *ctx = crtc->ctx;
384 struct drm_framebuffer *fb = state->base.fb;
385 int padding;
386 unsigned long val, alpha;
387 unsigned int last_x;
388 unsigned int last_y;
389 unsigned int win = plane->index;
390 unsigned int cpp = fb->format->cpp[0];
391 unsigned int pitch = fb->pitches[0];
392
393 if (ctx->suspended)
394 return;
395
396 /*
397 * SHADOWCON/PRTCON register is used for enabling timing.
398 *
399 * for example, once only width value of a register is set,
400 * if the dma is started then decon hardware could malfunction so
401 * with protect window setting, the register fields with prefix '_F'
402 * wouldn't be updated at vsync also but updated once unprotect window
403 * is set.
404 */
405
406 /* buffer start address */
407 val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0);
408 writel(val, ctx->regs + VIDW_BUF_START(win));
409
410 padding = (pitch / cpp) - fb->width;
411
412 /* buffer size */
413 writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));
414 writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win));
415
416 /* offset from the start of the buffer to read */
417 writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win));
418 writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win));
419
420 DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n",
421 (unsigned long)val);
422 DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
423 state->crtc.w, state->crtc.h);
424
425 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
426 VIDOSDxA_TOPLEFT_Y(state->crtc.y);
427 writel(val, ctx->regs + VIDOSD_A(win));
428
429 last_x = state->crtc.x + state->crtc.w;
430 if (last_x)
431 last_x--;
432 last_y = state->crtc.y + state->crtc.h;
433 if (last_y)
434 last_y--;
435
436 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y);
437
438 writel(val, ctx->regs + VIDOSD_B(win));
439
440 DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
441 state->crtc.x, state->crtc.y, last_x, last_y);
442
443 /* OSD alpha */
444 alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
445 VIDOSDxC_ALPHA0_G_F(0x0) |
446 VIDOSDxC_ALPHA0_B_F(0x0);
447
448 writel(alpha, ctx->regs + VIDOSD_C(win));
449
450 alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
451 VIDOSDxD_ALPHA1_G_F(0xff) |
452 VIDOSDxD_ALPHA1_B_F(0xff);
453
454 writel(alpha, ctx->regs + VIDOSD_D(win));
455
456 decon_win_set_pixfmt(ctx, win, fb);
457
458 /* hardware window 0 doesn't support color key. */
459 if (win != 0)
460 decon_win_set_colkey(ctx, win);
461
462 /* wincon */
463 val = readl(ctx->regs + WINCON(win));
464 val |= WINCONx_TRIPLE_BUF_MODE;
465 val |= WINCONx_ENWIN;
466 writel(val, ctx->regs + WINCON(win));
467
468 /* Enable DMA channel and unprotect windows */
469 decon_shadow_protect_win(ctx, win, false);
470
471 val = readl(ctx->regs + DECON_UPDATE);
472 val |= DECON_UPDATE_STANDALONE_F;
473 writel(val, ctx->regs + DECON_UPDATE);
474}
475
476static void decon_disable_plane(struct exynos_drm_crtc *crtc,
477 struct exynos_drm_plane *plane)
478{
479 struct decon_context *ctx = crtc->ctx;
480 unsigned int win = plane->index;
481 u32 val;
482
483 if (ctx->suspended)
484 return;
485
486 /* protect windows */
487 decon_shadow_protect_win(ctx, win, true);
488
489 /* wincon */
490 val = readl(ctx->regs + WINCON(win));
491 val &= ~WINCONx_ENWIN;
492 writel(val, ctx->regs + WINCON(win));
493
494 val = readl(ctx->regs + DECON_UPDATE);
495 val |= DECON_UPDATE_STANDALONE_F;
496 writel(val, ctx->regs + DECON_UPDATE);
497}
498
499static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
500{
501 struct decon_context *ctx = crtc->ctx;
502 int i;
503
504 if (ctx->suspended)
505 return;
506
507 for (i = 0; i < WINDOWS_NR; i++)
508 decon_shadow_protect_win(ctx, i, false);
509 exynos_crtc_handle_event(crtc);
510}
511
512static void decon_init(struct decon_context *ctx)
513{
514 u32 val;
515
516 writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
517
518 val = VIDOUTCON0_DISP_IF_0_ON;
519 if (!ctx->i80_if)
520 val |= VIDOUTCON0_RGBIF;
521 writel(val, ctx->regs + VIDOUTCON0);
522
523 writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
524
525 if (!ctx->i80_if)
526 writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
527}
528
529static void decon_enable(struct exynos_drm_crtc *crtc)
530{
531 struct decon_context *ctx = crtc->ctx;
532
533 if (!ctx->suspended)
534 return;
535
536 pm_runtime_get_sync(ctx->dev);
537
538 decon_init(ctx);
539
540 /* if vblank was enabled status, enable it again. */
541 if (test_and_clear_bit(0, &ctx->irq_flags))
542 decon_enable_vblank(ctx->crtc);
543
544 decon_commit(ctx->crtc);
545
546 ctx->suspended = false;
547}
548
549static void decon_disable(struct exynos_drm_crtc *crtc)
550{
551 struct decon_context *ctx = crtc->ctx;
552 int i;
553
554 if (ctx->suspended)
555 return;
556
557 /*
558 * We need to make sure that all windows are disabled before we
559 * suspend that connector. Otherwise we might try to scan from
560 * a destroyed buffer later.
561 */
562 for (i = 0; i < WINDOWS_NR; i++)
563 decon_disable_plane(crtc, &ctx->planes[i]);
564
565 pm_runtime_put_sync(ctx->dev);
566
567 ctx->suspended = true;
568}
569
570static const struct exynos_drm_crtc_ops decon_crtc_ops = {
571 .enable = decon_enable,
572 .disable = decon_disable,
573 .enable_vblank = decon_enable_vblank,
574 .disable_vblank = decon_disable_vblank,
575 .atomic_begin = decon_atomic_begin,
576 .update_plane = decon_update_plane,
577 .disable_plane = decon_disable_plane,
578 .atomic_flush = decon_atomic_flush,
579};
580
581
582static irqreturn_t decon_irq_handler(int irq, void *dev_id)
583{
584 struct decon_context *ctx = (struct decon_context *)dev_id;
585 u32 val, clear_bit;
586
587 val = readl(ctx->regs + VIDINTCON1);
588
589 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
590 if (val & clear_bit)
591 writel(clear_bit, ctx->regs + VIDINTCON1);
592
593 /* check the crtc is detached already from encoder */
594 if (!ctx->drm_dev)
595 goto out;
596
597 if (!ctx->i80_if) {
598 drm_crtc_handle_vblank(&ctx->crtc->base);
599
600 /* set wait vsync event to zero and wake up queue. */
601 if (atomic_read(&ctx->wait_vsync_event)) {
602 atomic_set(&ctx->wait_vsync_event, 0);
603 wake_up(&ctx->wait_vsync_queue);
604 }
605 }
606out:
607 return IRQ_HANDLED;
608}
609
610static int decon_bind(struct device *dev, struct device *master, void *data)
611{
612 struct decon_context *ctx = dev_get_drvdata(dev);
613 struct drm_device *drm_dev = data;
614 struct exynos_drm_plane *exynos_plane;
615 unsigned int i;
616 int ret;
617
618 ret = decon_ctx_initialize(ctx, drm_dev);
619 if (ret) {
620 DRM_DEV_ERROR(dev, "decon_ctx_initialize failed.\n");
621 return ret;
622 }
623
624 for (i = 0; i < WINDOWS_NR; i++) {
625 ctx->configs[i].pixel_formats = decon_formats;
626 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats);
627 ctx->configs[i].zpos = i;
628 ctx->configs[i].type = decon_win_types[i];
629
630 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
631 &ctx->configs[i]);
632 if (ret)
633 return ret;
634 }
635
636 exynos_plane = &ctx->planes[DEFAULT_WIN];
637 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
638 EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx);
639 if (IS_ERR(ctx->crtc)) {
640 decon_ctx_remove(ctx);
641 return PTR_ERR(ctx->crtc);
642 }
643
644 if (ctx->encoder)
645 exynos_dpi_bind(drm_dev, ctx->encoder);
646
647 return 0;
648
649}
650
651static void decon_unbind(struct device *dev, struct device *master,
652 void *data)
653{
654 struct decon_context *ctx = dev_get_drvdata(dev);
655
656 decon_disable(ctx->crtc);
657
658 if (ctx->encoder)
659 exynos_dpi_remove(ctx->encoder);
660
661 decon_ctx_remove(ctx);
662}
663
664static const struct component_ops decon_component_ops = {
665 .bind = decon_bind,
666 .unbind = decon_unbind,
667};
668
669static int decon_probe(struct platform_device *pdev)
670{
671 struct device *dev = &pdev->dev;
672 struct decon_context *ctx;
673 struct device_node *i80_if_timings;
674 struct resource *res;
675 int ret;
676
677 if (!dev->of_node)
678 return -ENODEV;
679
680 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
681 if (!ctx)
682 return -ENOMEM;
683
684 ctx->dev = dev;
685 ctx->suspended = true;
686
687 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
688 if (i80_if_timings)
689 ctx->i80_if = true;
690 of_node_put(i80_if_timings);
691
692 ctx->regs = of_iomap(dev->of_node, 0);
693 if (!ctx->regs)
694 return -ENOMEM;
695
696 ctx->pclk = devm_clk_get(dev, "pclk_decon0");
697 if (IS_ERR(ctx->pclk)) {
698 dev_err(dev, "failed to get bus clock pclk\n");
699 ret = PTR_ERR(ctx->pclk);
700 goto err_iounmap;
701 }
702
703 ctx->aclk = devm_clk_get(dev, "aclk_decon0");
704 if (IS_ERR(ctx->aclk)) {
705 dev_err(dev, "failed to get bus clock aclk\n");
706 ret = PTR_ERR(ctx->aclk);
707 goto err_iounmap;
708 }
709
710 ctx->eclk = devm_clk_get(dev, "decon0_eclk");
711 if (IS_ERR(ctx->eclk)) {
712 dev_err(dev, "failed to get eclock\n");
713 ret = PTR_ERR(ctx->eclk);
714 goto err_iounmap;
715 }
716
717 ctx->vclk = devm_clk_get(dev, "decon0_vclk");
718 if (IS_ERR(ctx->vclk)) {
719 dev_err(dev, "failed to get vclock\n");
720 ret = PTR_ERR(ctx->vclk);
721 goto err_iounmap;
722 }
723
724 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
725 ctx->i80_if ? "lcd_sys" : "vsync");
726 if (!res) {
727 dev_err(dev, "irq request failed.\n");
728 ret = -ENXIO;
729 goto err_iounmap;
730 }
731
732 ret = devm_request_irq(dev, res->start, decon_irq_handler,
733 0, "drm_decon", ctx);
734 if (ret) {
735 dev_err(dev, "irq request failed.\n");
736 goto err_iounmap;
737 }
738
739 init_waitqueue_head(&ctx->wait_vsync_queue);
740 atomic_set(&ctx->wait_vsync_event, 0);
741
742 platform_set_drvdata(pdev, ctx);
743
744 ctx->encoder = exynos_dpi_probe(dev);
745 if (IS_ERR(ctx->encoder)) {
746 ret = PTR_ERR(ctx->encoder);
747 goto err_iounmap;
748 }
749
750 pm_runtime_enable(dev);
751
752 ret = component_add(dev, &decon_component_ops);
753 if (ret)
754 goto err_disable_pm_runtime;
755
756 return ret;
757
758err_disable_pm_runtime:
759 pm_runtime_disable(dev);
760
761err_iounmap:
762 iounmap(ctx->regs);
763
764 return ret;
765}
766
767static int decon_remove(struct platform_device *pdev)
768{
769 struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
770
771 pm_runtime_disable(&pdev->dev);
772
773 iounmap(ctx->regs);
774
775 component_del(&pdev->dev, &decon_component_ops);
776
777 return 0;
778}
779
780#ifdef CONFIG_PM
781static int exynos7_decon_suspend(struct device *dev)
782{
783 struct decon_context *ctx = dev_get_drvdata(dev);
784
785 clk_disable_unprepare(ctx->vclk);
786 clk_disable_unprepare(ctx->eclk);
787 clk_disable_unprepare(ctx->aclk);
788 clk_disable_unprepare(ctx->pclk);
789
790 return 0;
791}
792
793static int exynos7_decon_resume(struct device *dev)
794{
795 struct decon_context *ctx = dev_get_drvdata(dev);
796 int ret;
797
798 ret = clk_prepare_enable(ctx->pclk);
799 if (ret < 0) {
800 DRM_DEV_ERROR(dev, "Failed to prepare_enable the pclk [%d]\n",
801 ret);
802 return ret;
803 }
804
805 ret = clk_prepare_enable(ctx->aclk);
806 if (ret < 0) {
807 DRM_DEV_ERROR(dev, "Failed to prepare_enable the aclk [%d]\n",
808 ret);
809 return ret;
810 }
811
812 ret = clk_prepare_enable(ctx->eclk);
813 if (ret < 0) {
814 DRM_DEV_ERROR(dev, "Failed to prepare_enable the eclk [%d]\n",
815 ret);
816 return ret;
817 }
818
819 ret = clk_prepare_enable(ctx->vclk);
820 if (ret < 0) {
821 DRM_DEV_ERROR(dev, "Failed to prepare_enable the vclk [%d]\n",
822 ret);
823 return ret;
824 }
825
826 return 0;
827}
828#endif
829
830static const struct dev_pm_ops exynos7_decon_pm_ops = {
831 SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume,
832 NULL)
833 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
834 pm_runtime_force_resume)
835};
836
837struct platform_driver decon_driver = {
838 .probe = decon_probe,
839 .remove = decon_remove,
840 .driver = {
841 .name = "exynos-decon",
842 .pm = &exynos7_decon_pm_ops,
843 .of_match_table = decon_driver_dt_match,
844 },
845};