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[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / exynos / exynos5433_drm_decon.c
1 /* drivers/gpu/drm/exynos5433_drm_decon.c
2 *
3 * Copyright (C) 2015 Samsung Electronics Co.Ltd
4 * Authors:
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Hyungwon Hwang <human.hwang@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundationr
11 */
12
13 #include <linux/platform_device.h>
14 #include <linux/clk.h>
15 #include <linux/component.h>
16 #include <linux/iopoll.h>
17 #include <linux/mfd/syscon.h>
18 #include <linux/of_device.h>
19 #include <linux/of_gpio.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/regmap.h>
22
23 #include <video/exynos5433_decon.h>
24
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_crtc.h"
27 #include "exynos_drm_fb.h"
28 #include "exynos_drm_plane.h"
29 #include "exynos_drm_iommu.h"
30
31 #define DSD_CFG_MUX 0x1004
32 #define DSD_CFG_MUX_TE_UNMASK_GLOBAL BIT(13)
33
34 #define WINDOWS_NR 3
35 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
36
37 #define I80_HW_TRG (1 << 0)
38 #define IFTYPE_HDMI (1 << 1)
39
40 static const char * const decon_clks_name[] = {
41 "pclk",
42 "aclk_decon",
43 "aclk_smmu_decon0x",
44 "aclk_xiu_decon0x",
45 "pclk_smmu_decon0x",
46 "sclk_decon_vclk",
47 "sclk_decon_eclk",
48 };
49
50 struct decon_context {
51 struct device *dev;
52 struct drm_device *drm_dev;
53 struct exynos_drm_crtc *crtc;
54 struct exynos_drm_plane planes[WINDOWS_NR];
55 struct exynos_drm_plane_config configs[WINDOWS_NR];
56 void __iomem *addr;
57 struct regmap *sysreg;
58 struct clk *clks[ARRAY_SIZE(decon_clks_name)];
59 unsigned int irq;
60 unsigned int irq_vsync;
61 unsigned int irq_lcd_sys;
62 unsigned int te_irq;
63 unsigned long out_type;
64 int first_win;
65 spinlock_t vblank_lock;
66 u32 frame_id;
67 };
68
69 static const uint32_t decon_formats[] = {
70 DRM_FORMAT_XRGB1555,
71 DRM_FORMAT_RGB565,
72 DRM_FORMAT_XRGB8888,
73 DRM_FORMAT_ARGB8888,
74 };
75
76 static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
77 DRM_PLANE_TYPE_PRIMARY,
78 DRM_PLANE_TYPE_OVERLAY,
79 DRM_PLANE_TYPE_CURSOR,
80 };
81
82 static inline void decon_set_bits(struct decon_context *ctx, u32 reg, u32 mask,
83 u32 val)
84 {
85 val = (val & mask) | (readl(ctx->addr + reg) & ~mask);
86 writel(val, ctx->addr + reg);
87 }
88
89 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
90 {
91 struct decon_context *ctx = crtc->ctx;
92 u32 val;
93
94 val = VIDINTCON0_INTEN;
95 if (crtc->i80_mode)
96 val |= VIDINTCON0_FRAMEDONE;
97 else
98 val |= VIDINTCON0_INTFRMEN | VIDINTCON0_FRAMESEL_FP;
99
100 writel(val, ctx->addr + DECON_VIDINTCON0);
101
102 enable_irq(ctx->irq);
103 if (!(ctx->out_type & I80_HW_TRG))
104 enable_irq(ctx->te_irq);
105
106 return 0;
107 }
108
109 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
110 {
111 struct decon_context *ctx = crtc->ctx;
112
113 if (!(ctx->out_type & I80_HW_TRG))
114 disable_irq_nosync(ctx->te_irq);
115 disable_irq_nosync(ctx->irq);
116
117 writel(0, ctx->addr + DECON_VIDINTCON0);
118 }
119
120 /* return number of starts/ends of frame transmissions since reset */
121 static u32 decon_get_frame_count(struct decon_context *ctx, bool end)
122 {
123 u32 frm, pfrm, status, cnt = 2;
124
125 /* To get consistent result repeat read until frame id is stable.
126 * Usually the loop will be executed once, in rare cases when the loop
127 * is executed at frame change time 2nd pass will be needed.
128 */
129 frm = readl(ctx->addr + DECON_CRFMID);
130 do {
131 status = readl(ctx->addr + DECON_VIDCON1);
132 pfrm = frm;
133 frm = readl(ctx->addr + DECON_CRFMID);
134 } while (frm != pfrm && --cnt);
135
136 /* CRFMID is incremented on BPORCH in case of I80 and on VSYNC in case
137 * of RGB, it should be taken into account.
138 */
139 if (!frm)
140 return 0;
141
142 switch (status & (VIDCON1_VSTATUS_MASK | VIDCON1_I80_ACTIVE)) {
143 case VIDCON1_VSTATUS_VS:
144 if (!(ctx->crtc->i80_mode))
145 --frm;
146 break;
147 case VIDCON1_VSTATUS_BP:
148 --frm;
149 break;
150 case VIDCON1_I80_ACTIVE:
151 case VIDCON1_VSTATUS_AC:
152 if (end)
153 --frm;
154 break;
155 default:
156 break;
157 }
158
159 return frm;
160 }
161
162 static u32 decon_get_vblank_counter(struct exynos_drm_crtc *crtc)
163 {
164 struct decon_context *ctx = crtc->ctx;
165
166 return decon_get_frame_count(ctx, false);
167 }
168
169 static void decon_setup_trigger(struct decon_context *ctx)
170 {
171 if (!ctx->crtc->i80_mode && !(ctx->out_type & I80_HW_TRG))
172 return;
173
174 if (!(ctx->out_type & I80_HW_TRG)) {
175 writel(TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
176 TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN,
177 ctx->addr + DECON_TRIGCON);
178 return;
179 }
180
181 writel(TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F | TRIGCON_HWTRIGMASK
182 | TRIGCON_HWTRIGEN, ctx->addr + DECON_TRIGCON);
183
184 if (regmap_update_bits(ctx->sysreg, DSD_CFG_MUX,
185 DSD_CFG_MUX_TE_UNMASK_GLOBAL, ~0))
186 DRM_ERROR("Cannot update sysreg.\n");
187 }
188
189 static void decon_commit(struct exynos_drm_crtc *crtc)
190 {
191 struct decon_context *ctx = crtc->ctx;
192 struct drm_display_mode *m = &crtc->base.mode;
193 bool interlaced = false;
194 u32 val;
195
196 if (ctx->out_type & IFTYPE_HDMI) {
197 m->crtc_hsync_start = m->crtc_hdisplay + 10;
198 m->crtc_hsync_end = m->crtc_htotal - 92;
199 m->crtc_vsync_start = m->crtc_vdisplay + 1;
200 m->crtc_vsync_end = m->crtc_vsync_start + 1;
201 if (m->flags & DRM_MODE_FLAG_INTERLACE)
202 interlaced = true;
203 }
204
205 decon_setup_trigger(ctx);
206
207 /* lcd on and use command if */
208 val = VIDOUT_LCD_ON;
209 if (interlaced)
210 val |= VIDOUT_INTERLACE_EN_F;
211 if (crtc->i80_mode) {
212 val |= VIDOUT_COMMAND_IF;
213 } else {
214 val |= VIDOUT_RGB_IF;
215 }
216
217 writel(val, ctx->addr + DECON_VIDOUTCON0);
218
219 if (interlaced)
220 val = VIDTCON2_LINEVAL(m->vdisplay / 2 - 1) |
221 VIDTCON2_HOZVAL(m->hdisplay - 1);
222 else
223 val = VIDTCON2_LINEVAL(m->vdisplay - 1) |
224 VIDTCON2_HOZVAL(m->hdisplay - 1);
225 writel(val, ctx->addr + DECON_VIDTCON2);
226
227 if (!crtc->i80_mode) {
228 int vbp = m->crtc_vtotal - m->crtc_vsync_end;
229 int vfp = m->crtc_vsync_start - m->crtc_vdisplay;
230
231 if (interlaced)
232 vbp = vbp / 2 - 1;
233 val = VIDTCON00_VBPD_F(vbp - 1) | VIDTCON00_VFPD_F(vfp - 1);
234 writel(val, ctx->addr + DECON_VIDTCON00);
235
236 val = VIDTCON01_VSPW_F(
237 m->crtc_vsync_end - m->crtc_vsync_start - 1);
238 writel(val, ctx->addr + DECON_VIDTCON01);
239
240 val = VIDTCON10_HBPD_F(
241 m->crtc_htotal - m->crtc_hsync_end - 1) |
242 VIDTCON10_HFPD_F(
243 m->crtc_hsync_start - m->crtc_hdisplay - 1);
244 writel(val, ctx->addr + DECON_VIDTCON10);
245
246 val = VIDTCON11_HSPW_F(
247 m->crtc_hsync_end - m->crtc_hsync_start - 1);
248 writel(val, ctx->addr + DECON_VIDTCON11);
249 }
250
251 /* enable output and display signal */
252 decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
253
254 decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
255 }
256
257 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
258 struct drm_framebuffer *fb)
259 {
260 unsigned long val;
261
262 val = readl(ctx->addr + DECON_WINCONx(win));
263 val &= ~WINCONx_BPPMODE_MASK;
264
265 switch (fb->format->format) {
266 case DRM_FORMAT_XRGB1555:
267 val |= WINCONx_BPPMODE_16BPP_I1555;
268 val |= WINCONx_HAWSWP_F;
269 val |= WINCONx_BURSTLEN_16WORD;
270 break;
271 case DRM_FORMAT_RGB565:
272 val |= WINCONx_BPPMODE_16BPP_565;
273 val |= WINCONx_HAWSWP_F;
274 val |= WINCONx_BURSTLEN_16WORD;
275 break;
276 case DRM_FORMAT_XRGB8888:
277 val |= WINCONx_BPPMODE_24BPP_888;
278 val |= WINCONx_WSWP_F;
279 val |= WINCONx_BURSTLEN_16WORD;
280 break;
281 case DRM_FORMAT_ARGB8888:
282 default:
283 val |= WINCONx_BPPMODE_32BPP_A8888;
284 val |= WINCONx_WSWP_F | WINCONx_BLD_PIX_F | WINCONx_ALPHA_SEL_F;
285 val |= WINCONx_BURSTLEN_16WORD;
286 break;
287 }
288
289 DRM_DEBUG_KMS("cpp = %u\n", fb->format->cpp[0]);
290
291 /*
292 * In case of exynos, setting dma-burst to 16Word causes permanent
293 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
294 * switching which is based on plane size is not recommended as
295 * plane size varies a lot towards the end of the screen and rapid
296 * movement causes unstable DMA which results into iommu crash/tear.
297 */
298
299 if (fb->width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
300 val &= ~WINCONx_BURSTLEN_MASK;
301 val |= WINCONx_BURSTLEN_8WORD;
302 }
303
304 writel(val, ctx->addr + DECON_WINCONx(win));
305 }
306
307 static void decon_shadow_protect(struct decon_context *ctx, bool protect)
308 {
309 decon_set_bits(ctx, DECON_SHADOWCON, SHADOWCON_PROTECT_MASK,
310 protect ? ~0 : 0);
311 }
312
313 static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
314 {
315 struct decon_context *ctx = crtc->ctx;
316
317 decon_shadow_protect(ctx, true);
318 }
319
320 #define BIT_VAL(x, e, s) (((x) & ((1 << ((e) - (s) + 1)) - 1)) << (s))
321 #define COORDINATE_X(x) BIT_VAL((x), 23, 12)
322 #define COORDINATE_Y(x) BIT_VAL((x), 11, 0)
323
324 static void decon_update_plane(struct exynos_drm_crtc *crtc,
325 struct exynos_drm_plane *plane)
326 {
327 struct exynos_drm_plane_state *state =
328 to_exynos_plane_state(plane->base.state);
329 struct decon_context *ctx = crtc->ctx;
330 struct drm_framebuffer *fb = state->base.fb;
331 unsigned int win = plane->index;
332 unsigned int cpp = fb->format->cpp[0];
333 unsigned int pitch = fb->pitches[0];
334 dma_addr_t dma_addr = exynos_drm_fb_dma_addr(fb, 0);
335 u32 val;
336
337 if (crtc->base.mode.flags & DRM_MODE_FLAG_INTERLACE) {
338 val = COORDINATE_X(state->crtc.x) |
339 COORDINATE_Y(state->crtc.y / 2);
340 writel(val, ctx->addr + DECON_VIDOSDxA(win));
341
342 val = COORDINATE_X(state->crtc.x + state->crtc.w - 1) |
343 COORDINATE_Y((state->crtc.y + state->crtc.h) / 2 - 1);
344 writel(val, ctx->addr + DECON_VIDOSDxB(win));
345 } else {
346 val = COORDINATE_X(state->crtc.x) | COORDINATE_Y(state->crtc.y);
347 writel(val, ctx->addr + DECON_VIDOSDxA(win));
348
349 val = COORDINATE_X(state->crtc.x + state->crtc.w - 1) |
350 COORDINATE_Y(state->crtc.y + state->crtc.h - 1);
351 writel(val, ctx->addr + DECON_VIDOSDxB(win));
352 }
353
354 val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
355 VIDOSD_Wx_ALPHA_B_F(0x0);
356 writel(val, ctx->addr + DECON_VIDOSDxC(win));
357
358 val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
359 VIDOSD_Wx_ALPHA_B_F(0x0);
360 writel(val, ctx->addr + DECON_VIDOSDxD(win));
361
362 writel(dma_addr, ctx->addr + DECON_VIDW0xADD0B0(win));
363
364 val = dma_addr + pitch * state->src.h;
365 writel(val, ctx->addr + DECON_VIDW0xADD1B0(win));
366
367 if (!(ctx->out_type & IFTYPE_HDMI))
368 val = BIT_VAL(pitch - state->crtc.w * cpp, 27, 14)
369 | BIT_VAL(state->crtc.w * cpp, 13, 0);
370 else
371 val = BIT_VAL(pitch - state->crtc.w * cpp, 29, 15)
372 | BIT_VAL(state->crtc.w * cpp, 14, 0);
373 writel(val, ctx->addr + DECON_VIDW0xADD2(win));
374
375 decon_win_set_pixfmt(ctx, win, fb);
376
377 /* window enable */
378 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, ~0);
379 }
380
381 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
382 struct exynos_drm_plane *plane)
383 {
384 struct decon_context *ctx = crtc->ctx;
385 unsigned int win = plane->index;
386
387 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
388 }
389
390 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
391 {
392 struct decon_context *ctx = crtc->ctx;
393 unsigned long flags;
394
395 spin_lock_irqsave(&ctx->vblank_lock, flags);
396
397 decon_shadow_protect(ctx, false);
398
399 decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
400
401 ctx->frame_id = decon_get_frame_count(ctx, true);
402
403 exynos_crtc_handle_event(crtc);
404
405 spin_unlock_irqrestore(&ctx->vblank_lock, flags);
406 }
407
408 static void decon_swreset(struct decon_context *ctx)
409 {
410 unsigned long flags;
411 u32 val;
412 int ret;
413
414 writel(0, ctx->addr + DECON_VIDCON0);
415 readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
416 ~val & VIDCON0_STOP_STATUS, 12, 20000);
417
418 writel(VIDCON0_SWRESET, ctx->addr + DECON_VIDCON0);
419 ret = readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
420 ~val & VIDCON0_SWRESET, 12, 20000);
421
422 WARN(ret < 0, "failed to software reset DECON\n");
423
424 spin_lock_irqsave(&ctx->vblank_lock, flags);
425 ctx->frame_id = 0;
426 spin_unlock_irqrestore(&ctx->vblank_lock, flags);
427
428 if (!(ctx->out_type & IFTYPE_HDMI))
429 return;
430
431 writel(VIDCON0_CLKVALUP | VIDCON0_VLCKFREE, ctx->addr + DECON_VIDCON0);
432 decon_set_bits(ctx, DECON_CMU,
433 CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F, ~0);
434 writel(VIDCON1_VCLK_RUN_VDEN_DISABLE, ctx->addr + DECON_VIDCON1);
435 writel(CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F | CRCCTRL_CRCCLKEN,
436 ctx->addr + DECON_CRCCTRL);
437 }
438
439 static void decon_enable(struct exynos_drm_crtc *crtc)
440 {
441 struct decon_context *ctx = crtc->ctx;
442
443 pm_runtime_get_sync(ctx->dev);
444
445 exynos_drm_pipe_clk_enable(crtc, true);
446
447 decon_swreset(ctx);
448
449 decon_commit(ctx->crtc);
450 }
451
452 static void decon_disable(struct exynos_drm_crtc *crtc)
453 {
454 struct decon_context *ctx = crtc->ctx;
455 int i;
456
457 if (!(ctx->out_type & I80_HW_TRG))
458 synchronize_irq(ctx->te_irq);
459 synchronize_irq(ctx->irq);
460
461 /*
462 * We need to make sure that all windows are disabled before we
463 * suspend that connector. Otherwise we might try to scan from
464 * a destroyed buffer later.
465 */
466 for (i = ctx->first_win; i < WINDOWS_NR; i++)
467 decon_disable_plane(crtc, &ctx->planes[i]);
468
469 decon_swreset(ctx);
470
471 exynos_drm_pipe_clk_enable(crtc, false);
472
473 pm_runtime_put_sync(ctx->dev);
474 }
475
476 static irqreturn_t decon_te_irq_handler(int irq, void *dev_id)
477 {
478 struct decon_context *ctx = dev_id;
479
480 decon_set_bits(ctx, DECON_TRIGCON, TRIGCON_SWTRIGCMD, ~0);
481
482 return IRQ_HANDLED;
483 }
484
485 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
486 {
487 struct decon_context *ctx = crtc->ctx;
488 int win, i, ret;
489
490 DRM_DEBUG_KMS("%s\n", __FILE__);
491
492 for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
493 ret = clk_prepare_enable(ctx->clks[i]);
494 if (ret < 0)
495 goto err;
496 }
497
498 decon_shadow_protect(ctx, true);
499 for (win = 0; win < WINDOWS_NR; win++)
500 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
501 decon_shadow_protect(ctx, false);
502
503 decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
504
505 /* TODO: wait for possible vsync */
506 msleep(50);
507
508 err:
509 while (--i >= 0)
510 clk_disable_unprepare(ctx->clks[i]);
511 }
512
513 static enum drm_mode_status decon_mode_valid(struct exynos_drm_crtc *crtc,
514 const struct drm_display_mode *mode)
515 {
516 struct decon_context *ctx = crtc->ctx;
517
518 ctx->irq = crtc->i80_mode ? ctx->irq_lcd_sys : ctx->irq_vsync;
519
520 if (ctx->irq)
521 return MODE_OK;
522
523 dev_info(ctx->dev, "Sink requires %s mode, but appropriate interrupt is not provided.\n",
524 crtc->i80_mode ? "command" : "video");
525
526 return MODE_BAD;
527 }
528
529 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
530 .enable = decon_enable,
531 .disable = decon_disable,
532 .enable_vblank = decon_enable_vblank,
533 .disable_vblank = decon_disable_vblank,
534 .get_vblank_counter = decon_get_vblank_counter,
535 .atomic_begin = decon_atomic_begin,
536 .update_plane = decon_update_plane,
537 .disable_plane = decon_disable_plane,
538 .mode_valid = decon_mode_valid,
539 .atomic_flush = decon_atomic_flush,
540 };
541
542 static int decon_bind(struct device *dev, struct device *master, void *data)
543 {
544 struct decon_context *ctx = dev_get_drvdata(dev);
545 struct drm_device *drm_dev = data;
546 struct exynos_drm_plane *exynos_plane;
547 enum exynos_drm_output_type out_type;
548 unsigned int win;
549 int ret;
550
551 ctx->drm_dev = drm_dev;
552 drm_dev->max_vblank_count = 0xffffffff;
553
554 for (win = ctx->first_win; win < WINDOWS_NR; win++) {
555 int tmp = (win == ctx->first_win) ? 0 : win;
556
557 ctx->configs[win].pixel_formats = decon_formats;
558 ctx->configs[win].num_pixel_formats = ARRAY_SIZE(decon_formats);
559 ctx->configs[win].zpos = win;
560 ctx->configs[win].type = decon_win_types[tmp];
561
562 ret = exynos_plane_init(drm_dev, &ctx->planes[win], win,
563 &ctx->configs[win]);
564 if (ret)
565 return ret;
566 }
567
568 exynos_plane = &ctx->planes[ctx->first_win];
569 out_type = (ctx->out_type & IFTYPE_HDMI) ? EXYNOS_DISPLAY_TYPE_HDMI
570 : EXYNOS_DISPLAY_TYPE_LCD;
571 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
572 out_type, &decon_crtc_ops, ctx);
573 if (IS_ERR(ctx->crtc))
574 return PTR_ERR(ctx->crtc);
575
576 decon_clear_channels(ctx->crtc);
577
578 return drm_iommu_attach_device(drm_dev, dev);
579 }
580
581 static void decon_unbind(struct device *dev, struct device *master, void *data)
582 {
583 struct decon_context *ctx = dev_get_drvdata(dev);
584
585 decon_disable(ctx->crtc);
586
587 /* detach this sub driver from iommu mapping if supported. */
588 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
589 }
590
591 static const struct component_ops decon_component_ops = {
592 .bind = decon_bind,
593 .unbind = decon_unbind,
594 };
595
596 static void decon_handle_vblank(struct decon_context *ctx)
597 {
598 u32 frm;
599
600 spin_lock(&ctx->vblank_lock);
601
602 frm = decon_get_frame_count(ctx, true);
603
604 if (frm != ctx->frame_id) {
605 /* handle only if incremented, take care of wrap-around */
606 if ((s32)(frm - ctx->frame_id) > 0)
607 drm_crtc_handle_vblank(&ctx->crtc->base);
608 ctx->frame_id = frm;
609 }
610
611 spin_unlock(&ctx->vblank_lock);
612 }
613
614 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
615 {
616 struct decon_context *ctx = dev_id;
617 u32 val;
618
619 val = readl(ctx->addr + DECON_VIDINTCON1);
620 val &= VIDINTCON1_INTFRMDONEPEND | VIDINTCON1_INTFRMPEND;
621
622 if (val) {
623 writel(val, ctx->addr + DECON_VIDINTCON1);
624 if (ctx->out_type & IFTYPE_HDMI) {
625 val = readl(ctx->addr + DECON_VIDOUTCON0);
626 val &= VIDOUT_INTERLACE_EN_F | VIDOUT_INTERLACE_FIELD_F;
627 if (val ==
628 (VIDOUT_INTERLACE_EN_F | VIDOUT_INTERLACE_FIELD_F))
629 return IRQ_HANDLED;
630 }
631 decon_handle_vblank(ctx);
632 }
633
634 return IRQ_HANDLED;
635 }
636
637 #ifdef CONFIG_PM
638 static int exynos5433_decon_suspend(struct device *dev)
639 {
640 struct decon_context *ctx = dev_get_drvdata(dev);
641 int i = ARRAY_SIZE(decon_clks_name);
642
643 while (--i >= 0)
644 clk_disable_unprepare(ctx->clks[i]);
645
646 return 0;
647 }
648
649 static int exynos5433_decon_resume(struct device *dev)
650 {
651 struct decon_context *ctx = dev_get_drvdata(dev);
652 int i, ret;
653
654 for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
655 ret = clk_prepare_enable(ctx->clks[i]);
656 if (ret < 0)
657 goto err;
658 }
659
660 return 0;
661
662 err:
663 while (--i >= 0)
664 clk_disable_unprepare(ctx->clks[i]);
665
666 return ret;
667 }
668 #endif
669
670 static const struct dev_pm_ops exynos5433_decon_pm_ops = {
671 SET_RUNTIME_PM_OPS(exynos5433_decon_suspend, exynos5433_decon_resume,
672 NULL)
673 };
674
675 static const struct of_device_id exynos5433_decon_driver_dt_match[] = {
676 {
677 .compatible = "samsung,exynos5433-decon",
678 .data = (void *)I80_HW_TRG
679 },
680 {
681 .compatible = "samsung,exynos5433-decon-tv",
682 .data = (void *)(I80_HW_TRG | IFTYPE_HDMI)
683 },
684 {},
685 };
686 MODULE_DEVICE_TABLE(of, exynos5433_decon_driver_dt_match);
687
688 static int decon_conf_irq(struct decon_context *ctx, const char *name,
689 irq_handler_t handler, unsigned long int flags)
690 {
691 struct platform_device *pdev = to_platform_device(ctx->dev);
692 int ret, irq = platform_get_irq_byname(pdev, name);
693
694 if (irq < 0) {
695 switch (irq) {
696 case -EPROBE_DEFER:
697 return irq;
698 case -ENODATA:
699 case -ENXIO:
700 return 0;
701 default:
702 dev_err(ctx->dev, "IRQ %s get failed, %d\n", name, irq);
703 return irq;
704 }
705 }
706 irq_set_status_flags(irq, IRQ_NOAUTOEN);
707 ret = devm_request_irq(ctx->dev, irq, handler, flags, "drm_decon", ctx);
708 if (ret < 0) {
709 dev_err(ctx->dev, "IRQ %s request failed\n", name);
710 return ret;
711 }
712
713 return irq;
714 }
715
716 static int exynos5433_decon_probe(struct platform_device *pdev)
717 {
718 struct device *dev = &pdev->dev;
719 struct decon_context *ctx;
720 struct resource *res;
721 int ret;
722 int i;
723
724 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
725 if (!ctx)
726 return -ENOMEM;
727
728 ctx->dev = dev;
729 ctx->out_type = (unsigned long)of_device_get_match_data(dev);
730 spin_lock_init(&ctx->vblank_lock);
731
732 if (ctx->out_type & IFTYPE_HDMI)
733 ctx->first_win = 1;
734
735 for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
736 struct clk *clk;
737
738 clk = devm_clk_get(ctx->dev, decon_clks_name[i]);
739 if (IS_ERR(clk))
740 return PTR_ERR(clk);
741
742 ctx->clks[i] = clk;
743 }
744
745 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
746 if (!res) {
747 dev_err(dev, "cannot find IO resource\n");
748 return -ENXIO;
749 }
750
751 ctx->addr = devm_ioremap_resource(dev, res);
752 if (IS_ERR(ctx->addr)) {
753 dev_err(dev, "ioremap failed\n");
754 return PTR_ERR(ctx->addr);
755 }
756
757 ret = decon_conf_irq(ctx, "vsync", decon_irq_handler, 0);
758 if (ret < 0)
759 return ret;
760 ctx->irq_vsync = ret;
761
762 ret = decon_conf_irq(ctx, "lcd_sys", decon_irq_handler, 0);
763 if (ret < 0)
764 return ret;
765 ctx->irq_lcd_sys = ret;
766
767 ret = decon_conf_irq(ctx, "te", decon_te_irq_handler,
768 IRQF_TRIGGER_RISING);
769 if (ret < 0)
770 return ret;
771 if (ret) {
772 ctx->te_irq = ret;
773 ctx->out_type &= ~I80_HW_TRG;
774 }
775
776 if (ctx->out_type & I80_HW_TRG) {
777 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
778 "samsung,disp-sysreg");
779 if (IS_ERR(ctx->sysreg)) {
780 dev_err(dev, "failed to get system register\n");
781 return PTR_ERR(ctx->sysreg);
782 }
783 }
784
785 platform_set_drvdata(pdev, ctx);
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 0;
794
795 err_disable_pm_runtime:
796 pm_runtime_disable(dev);
797
798 return ret;
799 }
800
801 static int exynos5433_decon_remove(struct platform_device *pdev)
802 {
803 pm_runtime_disable(&pdev->dev);
804
805 component_del(&pdev->dev, &decon_component_ops);
806
807 return 0;
808 }
809
810 struct platform_driver exynos5433_decon_driver = {
811 .probe = exynos5433_decon_probe,
812 .remove = exynos5433_decon_remove,
813 .driver = {
814 .name = "exynos5433-decon",
815 .pm = &exynos5433_decon_pm_ops,
816 .of_match_table = exynos5433_decon_driver_dt_match,
817 },
818 };
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