1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* exynos_drm_fimd.c
3 *
4 * Copyright (C) 2011 Samsung Electronics Co.Ltd
5 * Authors:
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Inki Dae <inki.dae@samsung.com>
8 */
9
10 #include <linux/clk.h>
11 #include <linux/component.h>
12 #include <linux/kernel.h>
13 #include <linux/mfd/syscon.h>
14 #include <linux/of.h>
15 #include <linux/of_device.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/regmap.h>
19
20 #include <video/of_display_timing.h>
21 #include <video/of_videomode.h>
22 #include <video/samsung_fimd.h>
23
24 #include <drm/drm_fourcc.h>
25 #include <drm/drm_vblank.h>
26 #include <drm/exynos_drm.h>
27
28 #include "exynos_drm_crtc.h"
29 #include "exynos_drm_drv.h"
30 #include "exynos_drm_fb.h"
31 #include "exynos_drm_plane.h"
32
33 /*
34 * FIMD stands for Fully Interactive Mobile Display and
35 * as a display controller, it transfers contents drawn on memory
36 * to a LCD Panel through Display Interfaces such as RGB or
37 * CPU Interface.
38 */
39
40 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
41
42 /* position control register for hardware window 0, 2 ~ 4.*/
43 #define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16)
44 #define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16)
45 /*
46 * size control register for hardware windows 0 and alpha control register
47 * for hardware windows 1 ~ 4
48 */
49 #define VIDOSD_C(win) (VIDOSD_BASE + 0x08 + (win) * 16)
50 /* size control register for hardware windows 1 ~ 2. */
51 #define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16)
52
53 #define VIDWnALPHA0(win) (VIDW_ALPHA + 0x00 + (win) * 8)
54 #define VIDWnALPHA1(win) (VIDW_ALPHA + 0x04 + (win) * 8)
55
56 #define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8)
57 #define VIDWx_BUF_START_S(win, buf) (VIDW_BUF_START_S(buf) + (win) * 8)
58 #define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8)
59 #define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4)
60
61 /* color key control register for hardware window 1 ~ 4. */
62 #define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + ((x - 1) * 8))
63 /* color key value register for hardware window 1 ~ 4. */
64 #define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + ((x - 1) * 8))
65
66 /* I80 trigger control register */
67 #define TRIGCON 0x1A4
68 #define TRGMODE_ENABLE (1 << 0)
69 #define SWTRGCMD_ENABLE (1 << 1)
70 /* Exynos3250, 3472, 5260 5410, 5420 and 5422 only supported. */
71 #define HWTRGEN_ENABLE (1 << 3)
72 #define HWTRGMASK_ENABLE (1 << 4)
73 /* Exynos3250, 3472, 5260, 5420 and 5422 only supported. */
74 #define HWTRIGEN_PER_ENABLE (1 << 31)
75
76 /* display mode change control register except exynos4 */
77 #define VIDOUT_CON 0x000
78 #define VIDOUT_CON_F_I80_LDI0 (0x2 << 8)
79
80 /* I80 interface control for main LDI register */
81 #define I80IFCONFAx(x) (0x1B0 + (x) * 4)
82 #define I80IFCONFBx(x) (0x1B8 + (x) * 4)
83 #define LCD_CS_SETUP(x) ((x) << 16)
84 #define LCD_WR_SETUP(x) ((x) << 12)
85 #define LCD_WR_ACTIVE(x) ((x) << 8)
86 #define LCD_WR_HOLD(x) ((x) << 4)
87 #define I80IFEN_ENABLE (1 << 0)
88
89 /* FIMD has totally five hardware windows. */
90 #define WINDOWS_NR 5
91
92 /* HW trigger flag on i80 panel. */
93 #define I80_HW_TRG (1 << 1)
94
95 struct fimd_driver_data {
96 unsigned int timing_base;
97 unsigned int lcdblk_offset;
98 unsigned int lcdblk_vt_shift;
99 unsigned int lcdblk_bypass_shift;
100 unsigned int lcdblk_mic_bypass_shift;
101 unsigned int trg_type;
102
103 unsigned int has_shadowcon:1;
104 unsigned int has_clksel:1;
105 unsigned int has_limited_fmt:1;
106 unsigned int has_vidoutcon:1;
107 unsigned int has_vtsel:1;
108 unsigned int has_mic_bypass:1;
109 unsigned int has_dp_clk:1;
110 unsigned int has_hw_trigger:1;
111 unsigned int has_trigger_per_te:1;
112 };
113
114 static struct fimd_driver_data s3c64xx_fimd_driver_data = {
115 .timing_base = 0x0,
116 .has_clksel = 1,
117 .has_limited_fmt = 1,
118 };
119
120 static struct fimd_driver_data s5pv210_fimd_driver_data = {
121 .timing_base = 0x0,
122 .has_shadowcon = 1,
123 .has_clksel = 1,
124 };
125
126 static struct fimd_driver_data exynos3_fimd_driver_data = {
127 .timing_base = 0x20000,
128 .lcdblk_offset = 0x210,
129 .lcdblk_bypass_shift = 1,
130 .has_shadowcon = 1,
131 .has_vidoutcon = 1,
132 };
133
134 static struct fimd_driver_data exynos4_fimd_driver_data = {
135 .timing_base = 0x0,
136 .lcdblk_offset = 0x210,
137 .lcdblk_vt_shift = 10,
138 .lcdblk_bypass_shift = 1,
139 .has_shadowcon = 1,
140 .has_vtsel = 1,
141 };
142
143 static struct fimd_driver_data exynos5_fimd_driver_data = {
144 .timing_base = 0x20000,
145 .lcdblk_offset = 0x214,
146 .lcdblk_vt_shift = 24,
147 .lcdblk_bypass_shift = 15,
148 .has_shadowcon = 1,
149 .has_vidoutcon = 1,
150 .has_vtsel = 1,
151 .has_dp_clk = 1,
152 };
153
154 static struct fimd_driver_data exynos5420_fimd_driver_data = {
155 .timing_base = 0x20000,
156 .lcdblk_offset = 0x214,
157 .lcdblk_vt_shift = 24,
158 .lcdblk_bypass_shift = 15,
159 .lcdblk_mic_bypass_shift = 11,
160 .has_shadowcon = 1,
161 .has_vidoutcon = 1,
162 .has_vtsel = 1,
163 .has_mic_bypass = 1,
164 .has_dp_clk = 1,
165 };
166
167 struct fimd_context {
168 struct device *dev;
169 struct drm_device *drm_dev;
170 void *dma_priv;
171 struct exynos_drm_crtc *crtc;
172 struct exynos_drm_plane planes[WINDOWS_NR];
173 struct exynos_drm_plane_config configs[WINDOWS_NR];
174 struct clk *bus_clk;
175 struct clk *lcd_clk;
176 void __iomem *regs;
177 struct regmap *sysreg;
178 unsigned long irq_flags;
179 u32 vidcon0;
180 u32 vidcon1;
181 u32 vidout_con;
182 u32 i80ifcon;
183 bool i80_if;
184 bool suspended;
185 wait_queue_head_t wait_vsync_queue;
186 atomic_t wait_vsync_event;
187 atomic_t win_updated;
188 atomic_t triggering;
189 u32 clkdiv;
190
191 const struct fimd_driver_data *driver_data;
192 struct drm_encoder *encoder;
193 struct exynos_drm_clk dp_clk;
194 };
195
196 static const struct of_device_id fimd_driver_dt_match[] = {
197 { .compatible = "samsung,s3c6400-fimd",
198 .data = &s3c64xx_fimd_driver_data },
199 { .compatible = "samsung,s5pv210-fimd",
200 .data = &s5pv210_fimd_driver_data },
201 { .compatible = "samsung,exynos3250-fimd",
202 .data = &exynos3_fimd_driver_data },
203 { .compatible = "samsung,exynos4210-fimd",
204 .data = &exynos4_fimd_driver_data },
205 { .compatible = "samsung,exynos5250-fimd",
206 .data = &exynos5_fimd_driver_data },
207 { .compatible = "samsung,exynos5420-fimd",
208 .data = &exynos5420_fimd_driver_data },
209 {},
210 };
211 MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
212
213 static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
214 DRM_PLANE_TYPE_PRIMARY,
215 DRM_PLANE_TYPE_OVERLAY,
216 DRM_PLANE_TYPE_OVERLAY,
217 DRM_PLANE_TYPE_OVERLAY,
218 DRM_PLANE_TYPE_CURSOR,
219 };
220
221 static const uint32_t fimd_formats[] = {
222 DRM_FORMAT_C8,
223 DRM_FORMAT_XRGB1555,
224 DRM_FORMAT_RGB565,
225 DRM_FORMAT_XRGB8888,
226 DRM_FORMAT_ARGB8888,
227 };
228
229 static const unsigned int capabilities[WINDOWS_NR] = {
230 0,
231 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
232 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
233 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
234 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
235 };
236
fimd_set_bits(struct fimd_context * ctx,u32 reg,u32 mask,u32 val)237 static inline void fimd_set_bits(struct fimd_context *ctx, u32 reg, u32 mask,
238 u32 val)
239 {
240 val = (val & mask) | (readl(ctx->regs + reg) & ~mask);
241 writel(val, ctx->regs + reg);
242 }
243
fimd_enable_vblank(struct exynos_drm_crtc * crtc)244 static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
245 {
246 struct fimd_context *ctx = crtc->ctx;
247 u32 val;
248
249 if (ctx->suspended)
250 return -EPERM;
251
252 if (!test_and_set_bit(0, &ctx->irq_flags)) {
253 val = readl(ctx->regs + VIDINTCON0);
254
255 val |= VIDINTCON0_INT_ENABLE;
256
257 if (ctx->i80_if) {
258 val |= VIDINTCON0_INT_I80IFDONE;
259 val |= VIDINTCON0_INT_SYSMAINCON;
260 val &= ~VIDINTCON0_INT_SYSSUBCON;
261 } else {
262 val |= VIDINTCON0_INT_FRAME;
263
264 val &= ~VIDINTCON0_FRAMESEL0_MASK;
265 val |= VIDINTCON0_FRAMESEL0_FRONTPORCH;
266 val &= ~VIDINTCON0_FRAMESEL1_MASK;
267 val |= VIDINTCON0_FRAMESEL1_NONE;
268 }
269
270 writel(val, ctx->regs + VIDINTCON0);
271 }
272
273 return 0;
274 }
275
fimd_disable_vblank(struct exynos_drm_crtc * crtc)276 static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
277 {
278 struct fimd_context *ctx = crtc->ctx;
279 u32 val;
280
281 if (ctx->suspended)
282 return;
283
284 if (test_and_clear_bit(0, &ctx->irq_flags)) {
285 val = readl(ctx->regs + VIDINTCON0);
286
287 val &= ~VIDINTCON0_INT_ENABLE;
288
289 if (ctx->i80_if) {
290 val &= ~VIDINTCON0_INT_I80IFDONE;
291 val &= ~VIDINTCON0_INT_SYSMAINCON;
292 val &= ~VIDINTCON0_INT_SYSSUBCON;
293 } else
294 val &= ~VIDINTCON0_INT_FRAME;
295
296 writel(val, ctx->regs + VIDINTCON0);
297 }
298 }
299
fimd_wait_for_vblank(struct exynos_drm_crtc * crtc)300 static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
301 {
302 struct fimd_context *ctx = crtc->ctx;
303
304 if (ctx->suspended)
305 return;
306
307 atomic_set(&ctx->wait_vsync_event, 1);
308
309 /*
310 * wait for FIMD to signal VSYNC interrupt or return after
311 * timeout which is set to 50ms (refresh rate of 20).
312 */
313 if (!wait_event_timeout(ctx->wait_vsync_queue,
314 !atomic_read(&ctx->wait_vsync_event),
315 HZ/20))
316 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
317 }
318
fimd_enable_video_output(struct fimd_context * ctx,unsigned int win,bool enable)319 static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
320 bool enable)
321 {
322 u32 val = readl(ctx->regs + WINCON(win));
323
324 if (enable)
325 val |= WINCONx_ENWIN;
326 else
327 val &= ~WINCONx_ENWIN;
328
329 writel(val, ctx->regs + WINCON(win));
330 }
331
fimd_enable_shadow_channel_path(struct fimd_context * ctx,unsigned int win,bool enable)332 static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
333 unsigned int win,
334 bool enable)
335 {
336 u32 val = readl(ctx->regs + SHADOWCON);
337
338 if (enable)
339 val |= SHADOWCON_CHx_ENABLE(win);
340 else
341 val &= ~SHADOWCON_CHx_ENABLE(win);
342
343 writel(val, ctx->regs + SHADOWCON);
344 }
345
fimd_clear_channels(struct exynos_drm_crtc * crtc)346 static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
347 {
348 struct fimd_context *ctx = crtc->ctx;
349 unsigned int win, ch_enabled = 0;
350
351 /* Hardware is in unknown state, so ensure it gets enabled properly */
352 pm_runtime_get_sync(ctx->dev);
353
354 clk_prepare_enable(ctx->bus_clk);
355 clk_prepare_enable(ctx->lcd_clk);
356
357 /* Check if any channel is enabled. */
358 for (win = 0; win < WINDOWS_NR; win++) {
359 u32 val = readl(ctx->regs + WINCON(win));
360
361 if (val & WINCONx_ENWIN) {
362 fimd_enable_video_output(ctx, win, false);
363
364 if (ctx->driver_data->has_shadowcon)
365 fimd_enable_shadow_channel_path(ctx, win,
366 false);
367
368 ch_enabled = 1;
369 }
370 }
371
372 /* Wait for vsync, as disable channel takes effect at next vsync */
373 if (ch_enabled) {
374 ctx->suspended = false;
375
376 fimd_enable_vblank(ctx->crtc);
377 fimd_wait_for_vblank(ctx->crtc);
378 fimd_disable_vblank(ctx->crtc);
379
380 ctx->suspended = true;
381 }
382
383 clk_disable_unprepare(ctx->lcd_clk);
384 clk_disable_unprepare(ctx->bus_clk);
385
386 pm_runtime_put(ctx->dev);
387 }
388
389
fimd_atomic_check(struct exynos_drm_crtc * crtc,struct drm_crtc_state * state)390 static int fimd_atomic_check(struct exynos_drm_crtc *crtc,
391 struct drm_crtc_state *state)
392 {
393 struct drm_display_mode *mode = &state->adjusted_mode;
394 struct fimd_context *ctx = crtc->ctx;
395 unsigned long ideal_clk, lcd_rate;
396 u32 clkdiv;
397
398 if (mode->clock == 0) {
399 DRM_DEV_ERROR(ctx->dev, "Mode has zero clock value.\n");
400 return -EINVAL;
401 }
402
403 ideal_clk = mode->clock * 1000;
404
405 if (ctx->i80_if) {
406 /*
407 * The frame done interrupt should be occurred prior to the
408 * next TE signal.
409 */
410 ideal_clk *= 2;
411 }
412
413 lcd_rate = clk_get_rate(ctx->lcd_clk);
414 if (2 * lcd_rate < ideal_clk) {
415 DRM_DEV_ERROR(ctx->dev,
416 "sclk_fimd clock too low(%lu) for requested pixel clock(%lu)\n",
417 lcd_rate, ideal_clk);
418 return -EINVAL;
419 }
420
421 /* Find the clock divider value that gets us closest to ideal_clk */
422 clkdiv = DIV_ROUND_CLOSEST(lcd_rate, ideal_clk);
423 if (clkdiv >= 0x200) {
424 DRM_DEV_ERROR(ctx->dev, "requested pixel clock(%lu) too low\n",
425 ideal_clk);
426 return -EINVAL;
427 }
428
429 ctx->clkdiv = (clkdiv < 0x100) ? clkdiv : 0xff;
430
431 return 0;
432 }
433
fimd_setup_trigger(struct fimd_context * ctx)434 static void fimd_setup_trigger(struct fimd_context *ctx)
435 {
436 void __iomem *timing_base = ctx->regs + ctx->driver_data->timing_base;
437 u32 trg_type = ctx->driver_data->trg_type;
438 u32 val = readl(timing_base + TRIGCON);
439
440 val &= ~(TRGMODE_ENABLE);
441
442 if (trg_type == I80_HW_TRG) {
443 if (ctx->driver_data->has_hw_trigger)
444 val |= HWTRGEN_ENABLE | HWTRGMASK_ENABLE;
445 if (ctx->driver_data->has_trigger_per_te)
446 val |= HWTRIGEN_PER_ENABLE;
447 } else {
448 val |= TRGMODE_ENABLE;
449 }
450
451 writel(val, timing_base + TRIGCON);
452 }
453
fimd_commit(struct exynos_drm_crtc * crtc)454 static void fimd_commit(struct exynos_drm_crtc *crtc)
455 {
456 struct fimd_context *ctx = crtc->ctx;
457 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
458 const struct fimd_driver_data *driver_data = ctx->driver_data;
459 void *timing_base = ctx->regs + driver_data->timing_base;
460 u32 val;
461
462 if (ctx->suspended)
463 return;
464
465 /* nothing to do if we haven't set the mode yet */
466 if (mode->htotal == 0 || mode->vtotal == 0)
467 return;
468
469 if (ctx->i80_if) {
470 val = ctx->i80ifcon | I80IFEN_ENABLE;
471 writel(val, timing_base + I80IFCONFAx(0));
472
473 /* disable auto frame rate */
474 writel(0, timing_base + I80IFCONFBx(0));
475
476 /* set video type selection to I80 interface */
477 if (driver_data->has_vtsel && ctx->sysreg &&
478 regmap_update_bits(ctx->sysreg,
479 driver_data->lcdblk_offset,
480 0x3 << driver_data->lcdblk_vt_shift,
481 0x1 << driver_data->lcdblk_vt_shift)) {
482 DRM_DEV_ERROR(ctx->dev,
483 "Failed to update sysreg for I80 i/f.\n");
484 return;
485 }
486 } else {
487 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
488 u32 vidcon1;
489
490 /* setup polarity values */
491 vidcon1 = ctx->vidcon1;
492 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
493 vidcon1 |= VIDCON1_INV_VSYNC;
494 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
495 vidcon1 |= VIDCON1_INV_HSYNC;
496 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
497
498 /* setup vertical timing values. */
499 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
500 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
501 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
502
503 val = VIDTCON0_VBPD(vbpd - 1) |
504 VIDTCON0_VFPD(vfpd - 1) |
505 VIDTCON0_VSPW(vsync_len - 1);
506 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
507
508 /* setup horizontal timing values. */
509 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
510 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
511 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
512
513 val = VIDTCON1_HBPD(hbpd - 1) |
514 VIDTCON1_HFPD(hfpd - 1) |
515 VIDTCON1_HSPW(hsync_len - 1);
516 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
517 }
518
519 if (driver_data->has_vidoutcon)
520 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
521
522 /* set bypass selection */
523 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
524 driver_data->lcdblk_offset,
525 0x1 << driver_data->lcdblk_bypass_shift,
526 0x1 << driver_data->lcdblk_bypass_shift)) {
527 DRM_DEV_ERROR(ctx->dev,
528 "Failed to update sysreg for bypass setting.\n");
529 return;
530 }
531
532 /* TODO: When MIC is enabled for display path, the lcdblk_mic_bypass
533 * bit should be cleared.
534 */
535 if (driver_data->has_mic_bypass && ctx->sysreg &&
536 regmap_update_bits(ctx->sysreg,
537 driver_data->lcdblk_offset,
538 0x1 << driver_data->lcdblk_mic_bypass_shift,
539 0x1 << driver_data->lcdblk_mic_bypass_shift)) {
540 DRM_DEV_ERROR(ctx->dev,
541 "Failed to update sysreg for bypass mic.\n");
542 return;
543 }
544
545 /* setup horizontal and vertical display size. */
546 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
547 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
548 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
549 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
550 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
551
552 fimd_setup_trigger(ctx);
553
554 /*
555 * fields of register with prefix '_F' would be updated
556 * at vsync(same as dma start)
557 */
558 val = ctx->vidcon0;
559 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
560
561 if (ctx->driver_data->has_clksel)
562 val |= VIDCON0_CLKSEL_LCD;
563
564 if (ctx->clkdiv > 1)
565 val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR;
566
567 writel(val, ctx->regs + VIDCON0);
568 }
569
fimd_win_set_bldeq(struct fimd_context * ctx,unsigned int win,unsigned int alpha,unsigned int pixel_alpha)570 static void fimd_win_set_bldeq(struct fimd_context *ctx, unsigned int win,
571 unsigned int alpha, unsigned int pixel_alpha)
572 {
573 u32 mask = BLENDEQ_A_FUNC_F(0xf) | BLENDEQ_B_FUNC_F(0xf);
574 u32 val = 0;
575
576 switch (pixel_alpha) {
577 case DRM_MODE_BLEND_PIXEL_NONE:
578 case DRM_MODE_BLEND_COVERAGE:
579 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ALPHA_A);
580 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
581 break;
582 case DRM_MODE_BLEND_PREMULTI:
583 default:
584 if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
585 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ALPHA0);
586 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
587 } else {
588 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ONE);
589 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
590 }
591 break;
592 }
593 fimd_set_bits(ctx, BLENDEQx(win), mask, val);
594 }
595
fimd_win_set_bldmod(struct fimd_context * ctx,unsigned int win,unsigned int alpha,unsigned int pixel_alpha)596 static void fimd_win_set_bldmod(struct fimd_context *ctx, unsigned int win,
597 unsigned int alpha, unsigned int pixel_alpha)
598 {
599 u32 win_alpha_l = (alpha >> 8) & 0xf;
600 u32 win_alpha_h = alpha >> 12;
601 u32 val = 0;
602
603 switch (pixel_alpha) {
604 case DRM_MODE_BLEND_PIXEL_NONE:
605 break;
606 case DRM_MODE_BLEND_COVERAGE:
607 case DRM_MODE_BLEND_PREMULTI:
608 default:
609 val |= WINCON1_ALPHA_SEL;
610 val |= WINCON1_BLD_PIX;
611 val |= WINCON1_ALPHA_MUL;
612 break;
613 }
614 fimd_set_bits(ctx, WINCON(win), WINCONx_BLEND_MODE_MASK, val);
615
616 /* OSD alpha */
617 val = VIDISD14C_ALPHA0_R(win_alpha_h) |
618 VIDISD14C_ALPHA0_G(win_alpha_h) |
619 VIDISD14C_ALPHA0_B(win_alpha_h) |
620 VIDISD14C_ALPHA1_R(0x0) |
621 VIDISD14C_ALPHA1_G(0x0) |
622 VIDISD14C_ALPHA1_B(0x0);
623 writel(val, ctx->regs + VIDOSD_C(win));
624
625 val = VIDW_ALPHA_R(win_alpha_l) | VIDW_ALPHA_G(win_alpha_l) |
626 VIDW_ALPHA_B(win_alpha_l);
627 writel(val, ctx->regs + VIDWnALPHA0(win));
628
629 val = VIDW_ALPHA_R(0x0) | VIDW_ALPHA_G(0x0) |
630 VIDW_ALPHA_B(0x0);
631 writel(val, ctx->regs + VIDWnALPHA1(win));
632
633 fimd_set_bits(ctx, BLENDCON, BLENDCON_NEW_MASK,
634 BLENDCON_NEW_8BIT_ALPHA_VALUE);
635 }
636
fimd_win_set_pixfmt(struct fimd_context * ctx,unsigned int win,struct drm_framebuffer * fb,int width)637 static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
638 struct drm_framebuffer *fb, int width)
639 {
640 struct exynos_drm_plane plane = ctx->planes[win];
641 struct exynos_drm_plane_state *state =
642 to_exynos_plane_state(plane.base.state);
643 uint32_t pixel_format = fb->format->format;
644 unsigned int alpha = state->base.alpha;
645 u32 val = WINCONx_ENWIN;
646 unsigned int pixel_alpha;
647
648 if (fb->format->has_alpha)
649 pixel_alpha = state->base.pixel_blend_mode;
650 else
651 pixel_alpha = DRM_MODE_BLEND_PIXEL_NONE;
652
653 /*
654 * In case of s3c64xx, window 0 doesn't support alpha channel.
655 * So the request format is ARGB8888 then change it to XRGB8888.
656 */
657 if (ctx->driver_data->has_limited_fmt && !win) {
658 if (pixel_format == DRM_FORMAT_ARGB8888)
659 pixel_format = DRM_FORMAT_XRGB8888;
660 }
661
662 switch (pixel_format) {
663 case DRM_FORMAT_C8:
664 val |= WINCON0_BPPMODE_8BPP_PALETTE;
665 val |= WINCONx_BURSTLEN_8WORD;
666 val |= WINCONx_BYTSWP;
667 break;
668 case DRM_FORMAT_XRGB1555:
669 val |= WINCON0_BPPMODE_16BPP_1555;
670 val |= WINCONx_HAWSWP;
671 val |= WINCONx_BURSTLEN_16WORD;
672 break;
673 case DRM_FORMAT_RGB565:
674 val |= WINCON0_BPPMODE_16BPP_565;
675 val |= WINCONx_HAWSWP;
676 val |= WINCONx_BURSTLEN_16WORD;
677 break;
678 case DRM_FORMAT_XRGB8888:
679 val |= WINCON0_BPPMODE_24BPP_888;
680 val |= WINCONx_WSWP;
681 val |= WINCONx_BURSTLEN_16WORD;
682 break;
683 case DRM_FORMAT_ARGB8888:
684 default:
685 val |= WINCON1_BPPMODE_25BPP_A1888;
686 val |= WINCONx_WSWP;
687 val |= WINCONx_BURSTLEN_16WORD;
688 break;
689 }
690
691 /*
692 * Setting dma-burst to 16Word causes permanent tearing for very small
693 * buffers, e.g. cursor buffer. Burst Mode switching which based on
694 * plane size is not recommended as plane size varies alot towards the
695 * end of the screen and rapid movement causes unstable DMA, but it is
696 * still better to change dma-burst than displaying garbage.
697 */
698
699 if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
700 val &= ~WINCONx_BURSTLEN_MASK;
701 val |= WINCONx_BURSTLEN_4WORD;
702 }
703 fimd_set_bits(ctx, WINCON(win), ~WINCONx_BLEND_MODE_MASK, val);
704
705 /* hardware window 0 doesn't support alpha channel. */
706 if (win != 0) {
707 fimd_win_set_bldmod(ctx, win, alpha, pixel_alpha);
708 fimd_win_set_bldeq(ctx, win, alpha, pixel_alpha);
709 }
710 }
711
fimd_win_set_colkey(struct fimd_context * ctx,unsigned int win)712 static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
713 {
714 unsigned int keycon0 = 0, keycon1 = 0;
715
716 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
717 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
718
719 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
720
721 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
722 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
723 }
724
725 /**
726 * shadow_protect_win() - disable updating values from shadow registers at vsync
727 *
728 * @win: window to protect registers for
729 * @protect: 1 to protect (disable updates)
730 */
fimd_shadow_protect_win(struct fimd_context * ctx,unsigned int win,bool protect)731 static void fimd_shadow_protect_win(struct fimd_context *ctx,
732 unsigned int win, bool protect)
733 {
734 u32 reg, bits, val;
735
736 /*
737 * SHADOWCON/PRTCON register is used for enabling timing.
738 *
739 * for example, once only width value of a register is set,
740 * if the dma is started then fimd hardware could malfunction so
741 * with protect window setting, the register fields with prefix '_F'
742 * wouldn't be updated at vsync also but updated once unprotect window
743 * is set.
744 */
745
746 if (ctx->driver_data->has_shadowcon) {
747 reg = SHADOWCON;
748 bits = SHADOWCON_WINx_PROTECT(win);
749 } else {
750 reg = PRTCON;
751 bits = PRTCON_PROTECT;
752 }
753
754 val = readl(ctx->regs + reg);
755 if (protect)
756 val |= bits;
757 else
758 val &= ~bits;
759 writel(val, ctx->regs + reg);
760 }
761
fimd_atomic_begin(struct exynos_drm_crtc * crtc)762 static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
763 {
764 struct fimd_context *ctx = crtc->ctx;
765 int i;
766
767 if (ctx->suspended)
768 return;
769
770 for (i = 0; i < WINDOWS_NR; i++)
771 fimd_shadow_protect_win(ctx, i, true);
772 }
773
fimd_atomic_flush(struct exynos_drm_crtc * crtc)774 static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
775 {
776 struct fimd_context *ctx = crtc->ctx;
777 int i;
778
779 if (ctx->suspended)
780 return;
781
782 for (i = 0; i < WINDOWS_NR; i++)
783 fimd_shadow_protect_win(ctx, i, false);
784
785 exynos_crtc_handle_event(crtc);
786 }
787
fimd_update_plane(struct exynos_drm_crtc * crtc,struct exynos_drm_plane * plane)788 static void fimd_update_plane(struct exynos_drm_crtc *crtc,
789 struct exynos_drm_plane *plane)
790 {
791 struct exynos_drm_plane_state *state =
792 to_exynos_plane_state(plane->base.state);
793 struct fimd_context *ctx = crtc->ctx;
794 struct drm_framebuffer *fb = state->base.fb;
795 dma_addr_t dma_addr;
796 unsigned long val, size, offset;
797 unsigned int last_x, last_y, buf_offsize, line_size;
798 unsigned int win = plane->index;
799 unsigned int cpp = fb->format->cpp[0];
800 unsigned int pitch = fb->pitches[0];
801
802 if (ctx->suspended)
803 return;
804
805 offset = state->src.x * cpp;
806 offset += state->src.y * pitch;
807
808 /* buffer start address */
809 dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
810 val = (unsigned long)dma_addr;
811 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
812
813 /* buffer end address */
814 size = pitch * state->crtc.h;
815 val = (unsigned long)(dma_addr + size);
816 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
817
818 DRM_DEV_DEBUG_KMS(ctx->dev,
819 "start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
820 (unsigned long)dma_addr, val, size);
821 DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
822 state->crtc.w, state->crtc.h);
823
824 /* buffer size */
825 buf_offsize = pitch - (state->crtc.w * cpp);
826 line_size = state->crtc.w * cpp;
827 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
828 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
829 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
830 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
831 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
832
833 /* OSD position */
834 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
835 VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
836 VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
837 VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
838 writel(val, ctx->regs + VIDOSD_A(win));
839
840 last_x = state->crtc.x + state->crtc.w;
841 if (last_x)
842 last_x--;
843 last_y = state->crtc.y + state->crtc.h;
844 if (last_y)
845 last_y--;
846
847 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
848 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
849
850 writel(val, ctx->regs + VIDOSD_B(win));
851
852 DRM_DEV_DEBUG_KMS(ctx->dev,
853 "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
854 state->crtc.x, state->crtc.y, last_x, last_y);
855
856 /* OSD size */
857 if (win != 3 && win != 4) {
858 u32 offset = VIDOSD_D(win);
859 if (win == 0)
860 offset = VIDOSD_C(win);
861 val = state->crtc.w * state->crtc.h;
862 writel(val, ctx->regs + offset);
863
864 DRM_DEV_DEBUG_KMS(ctx->dev, "osd size = 0x%x\n",
865 (unsigned int)val);
866 }
867
868 fimd_win_set_pixfmt(ctx, win, fb, state->src.w);
869
870 /* hardware window 0 doesn't support color key. */
871 if (win != 0)
872 fimd_win_set_colkey(ctx, win);
873
874 fimd_enable_video_output(ctx, win, true);
875
876 if (ctx->driver_data->has_shadowcon)
877 fimd_enable_shadow_channel_path(ctx, win, true);
878
879 if (ctx->i80_if)
880 atomic_set(&ctx->win_updated, 1);
881 }
882
fimd_disable_plane(struct exynos_drm_crtc * crtc,struct exynos_drm_plane * plane)883 static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
884 struct exynos_drm_plane *plane)
885 {
886 struct fimd_context *ctx = crtc->ctx;
887 unsigned int win = plane->index;
888
889 if (ctx->suspended)
890 return;
891
892 fimd_enable_video_output(ctx, win, false);
893
894 if (ctx->driver_data->has_shadowcon)
895 fimd_enable_shadow_channel_path(ctx, win, false);
896 }
897
fimd_atomic_enable(struct exynos_drm_crtc * crtc)898 static void fimd_atomic_enable(struct exynos_drm_crtc *crtc)
899 {
900 struct fimd_context *ctx = crtc->ctx;
901
902 if (!ctx->suspended)
903 return;
904
905 ctx->suspended = false;
906
907 pm_runtime_get_sync(ctx->dev);
908
909 /* if vblank was enabled status, enable it again. */
910 if (test_and_clear_bit(0, &ctx->irq_flags))
911 fimd_enable_vblank(ctx->crtc);
912
913 fimd_commit(ctx->crtc);
914 }
915
fimd_atomic_disable(struct exynos_drm_crtc * crtc)916 static void fimd_atomic_disable(struct exynos_drm_crtc *crtc)
917 {
918 struct fimd_context *ctx = crtc->ctx;
919 int i;
920
921 if (ctx->suspended)
922 return;
923
924 /*
925 * We need to make sure that all windows are disabled before we
926 * suspend that connector. Otherwise we might try to scan from
927 * a destroyed buffer later.
928 */
929 for (i = 0; i < WINDOWS_NR; i++)
930 fimd_disable_plane(crtc, &ctx->planes[i]);
931
932 fimd_enable_vblank(crtc);
933 fimd_wait_for_vblank(crtc);
934 fimd_disable_vblank(crtc);
935
936 writel(0, ctx->regs + VIDCON0);
937
938 pm_runtime_put_sync(ctx->dev);
939 ctx->suspended = true;
940 }
941
fimd_trigger(struct device * dev)942 static void fimd_trigger(struct device *dev)
943 {
944 struct fimd_context *ctx = dev_get_drvdata(dev);
945 const struct fimd_driver_data *driver_data = ctx->driver_data;
946 void *timing_base = ctx->regs + driver_data->timing_base;
947 u32 reg;
948
949 /*
950 * Skips triggering if in triggering state, because multiple triggering
951 * requests can cause panel reset.
952 */
953 if (atomic_read(&ctx->triggering))
954 return;
955
956 /* Enters triggering mode */
957 atomic_set(&ctx->triggering, 1);
958
959 reg = readl(timing_base + TRIGCON);
960 reg |= (TRGMODE_ENABLE | SWTRGCMD_ENABLE);
961 writel(reg, timing_base + TRIGCON);
962
963 /*
964 * Exits triggering mode if vblank is not enabled yet, because when the
965 * VIDINTCON0 register is not set, it can not exit from triggering mode.
966 */
967 if (!test_bit(0, &ctx->irq_flags))
968 atomic_set(&ctx->triggering, 0);
969 }
970
fimd_te_handler(struct exynos_drm_crtc * crtc)971 static void fimd_te_handler(struct exynos_drm_crtc *crtc)
972 {
973 struct fimd_context *ctx = crtc->ctx;
974 u32 trg_type = ctx->driver_data->trg_type;
975
976 /* Checks the crtc is detached already from encoder */
977 if (!ctx->drm_dev)
978 return;
979
980 if (trg_type == I80_HW_TRG)
981 goto out;
982
983 /*
984 * If there is a page flip request, triggers and handles the page flip
985 * event so that current fb can be updated into panel GRAM.
986 */
987 if (atomic_add_unless(&ctx->win_updated, -1, 0))
988 fimd_trigger(ctx->dev);
989
990 out:
991 /* Wakes up vsync event queue */
992 if (atomic_read(&ctx->wait_vsync_event)) {
993 atomic_set(&ctx->wait_vsync_event, 0);
994 wake_up(&ctx->wait_vsync_queue);
995 }
996
997 if (test_bit(0, &ctx->irq_flags))
998 drm_crtc_handle_vblank(&ctx->crtc->base);
999 }
1000
fimd_dp_clock_enable(struct exynos_drm_clk * clk,bool enable)1001 static void fimd_dp_clock_enable(struct exynos_drm_clk *clk, bool enable)
1002 {
1003 struct fimd_context *ctx = container_of(clk, struct fimd_context,
1004 dp_clk);
1005 u32 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
1006 writel(val, ctx->regs + DP_MIE_CLKCON);
1007 }
1008
1009 static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
1010 .atomic_enable = fimd_atomic_enable,
1011 .atomic_disable = fimd_atomic_disable,
1012 .enable_vblank = fimd_enable_vblank,
1013 .disable_vblank = fimd_disable_vblank,
1014 .atomic_begin = fimd_atomic_begin,
1015 .update_plane = fimd_update_plane,
1016 .disable_plane = fimd_disable_plane,
1017 .atomic_flush = fimd_atomic_flush,
1018 .atomic_check = fimd_atomic_check,
1019 .te_handler = fimd_te_handler,
1020 };
1021
fimd_irq_handler(int irq,void * dev_id)1022 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
1023 {
1024 struct fimd_context *ctx = (struct fimd_context *)dev_id;
1025 u32 val, clear_bit;
1026
1027 val = readl(ctx->regs + VIDINTCON1);
1028
1029 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
1030 if (val & clear_bit)
1031 writel(clear_bit, ctx->regs + VIDINTCON1);
1032
1033 /* check the crtc is detached already from encoder */
1034 if (!ctx->drm_dev)
1035 goto out;
1036
1037 if (!ctx->i80_if)
1038 drm_crtc_handle_vblank(&ctx->crtc->base);
1039
1040 if (ctx->i80_if) {
1041 /* Exits triggering mode */
1042 atomic_set(&ctx->triggering, 0);
1043 } else {
1044 /* set wait vsync event to zero and wake up queue. */
1045 if (atomic_read(&ctx->wait_vsync_event)) {
1046 atomic_set(&ctx->wait_vsync_event, 0);
1047 wake_up(&ctx->wait_vsync_queue);
1048 }
1049 }
1050
1051 out:
1052 return IRQ_HANDLED;
1053 }
1054
fimd_bind(struct device * dev,struct device * master,void * data)1055 static int fimd_bind(struct device *dev, struct device *master, void *data)
1056 {
1057 struct fimd_context *ctx = dev_get_drvdata(dev);
1058 struct drm_device *drm_dev = data;
1059 struct exynos_drm_plane *exynos_plane;
1060 unsigned int i;
1061 int ret;
1062
1063 ctx->drm_dev = drm_dev;
1064
1065 for (i = 0; i < WINDOWS_NR; i++) {
1066 ctx->configs[i].pixel_formats = fimd_formats;
1067 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
1068 ctx->configs[i].zpos = i;
1069 ctx->configs[i].type = fimd_win_types[i];
1070 ctx->configs[i].capabilities = capabilities[i];
1071 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
1072 &ctx->configs[i]);
1073 if (ret)
1074 return ret;
1075 }
1076
1077 exynos_plane = &ctx->planes[DEFAULT_WIN];
1078 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
1079 EXYNOS_DISPLAY_TYPE_LCD, &fimd_crtc_ops, ctx);
1080 if (IS_ERR(ctx->crtc))
1081 return PTR_ERR(ctx->crtc);
1082
1083 if (ctx->driver_data->has_dp_clk) {
1084 ctx->dp_clk.enable = fimd_dp_clock_enable;
1085 ctx->crtc->pipe_clk = &ctx->dp_clk;
1086 }
1087
1088 if (ctx->encoder)
1089 exynos_dpi_bind(drm_dev, ctx->encoder);
1090
1091 if (is_drm_iommu_supported(drm_dev))
1092 fimd_clear_channels(ctx->crtc);
1093
1094 return exynos_drm_register_dma(drm_dev, dev, &ctx->dma_priv);
1095 }
1096
fimd_unbind(struct device * dev,struct device * master,void * data)1097 static void fimd_unbind(struct device *dev, struct device *master,
1098 void *data)
1099 {
1100 struct fimd_context *ctx = dev_get_drvdata(dev);
1101
1102 fimd_atomic_disable(ctx->crtc);
1103
1104 exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv);
1105
1106 if (ctx->encoder)
1107 exynos_dpi_remove(ctx->encoder);
1108 }
1109
1110 static const struct component_ops fimd_component_ops = {
1111 .bind = fimd_bind,
1112 .unbind = fimd_unbind,
1113 };
1114
fimd_probe(struct platform_device * pdev)1115 static int fimd_probe(struct platform_device *pdev)
1116 {
1117 struct device *dev = &pdev->dev;
1118 struct fimd_context *ctx;
1119 struct device_node *i80_if_timings;
1120 struct resource *res;
1121 int ret;
1122
1123 if (!dev->of_node)
1124 return -ENODEV;
1125
1126 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1127 if (!ctx)
1128 return -ENOMEM;
1129
1130 ctx->dev = dev;
1131 ctx->suspended = true;
1132 ctx->driver_data = of_device_get_match_data(dev);
1133
1134 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1135 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1136 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1137 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1138
1139 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1140 if (i80_if_timings) {
1141 u32 val;
1142
1143 ctx->i80_if = true;
1144
1145 if (ctx->driver_data->has_vidoutcon)
1146 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1147 else
1148 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1149 /*
1150 * The user manual describes that this "DSI_EN" bit is required
1151 * to enable I80 24-bit data interface.
1152 */
1153 ctx->vidcon0 |= VIDCON0_DSI_EN;
1154
1155 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1156 val = 0;
1157 ctx->i80ifcon = LCD_CS_SETUP(val);
1158 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1159 val = 0;
1160 ctx->i80ifcon |= LCD_WR_SETUP(val);
1161 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1162 val = 1;
1163 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1164 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1165 val = 0;
1166 ctx->i80ifcon |= LCD_WR_HOLD(val);
1167 }
1168 of_node_put(i80_if_timings);
1169
1170 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1171 "samsung,sysreg");
1172 if (IS_ERR(ctx->sysreg)) {
1173 dev_warn(dev, "failed to get system register.\n");
1174 ctx->sysreg = NULL;
1175 }
1176
1177 ctx->bus_clk = devm_clk_get(dev, "fimd");
1178 if (IS_ERR(ctx->bus_clk)) {
1179 dev_err(dev, "failed to get bus clock\n");
1180 return PTR_ERR(ctx->bus_clk);
1181 }
1182
1183 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1184 if (IS_ERR(ctx->lcd_clk)) {
1185 dev_err(dev, "failed to get lcd clock\n");
1186 return PTR_ERR(ctx->lcd_clk);
1187 }
1188
1189 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1190
1191 ctx->regs = devm_ioremap_resource(dev, res);
1192 if (IS_ERR(ctx->regs))
1193 return PTR_ERR(ctx->regs);
1194
1195 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1196 ctx->i80_if ? "lcd_sys" : "vsync");
1197 if (!res) {
1198 dev_err(dev, "irq request failed.\n");
1199 return -ENXIO;
1200 }
1201
1202 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1203 0, "drm_fimd", ctx);
1204 if (ret) {
1205 dev_err(dev, "irq request failed.\n");
1206 return ret;
1207 }
1208
1209 init_waitqueue_head(&ctx->wait_vsync_queue);
1210 atomic_set(&ctx->wait_vsync_event, 0);
1211
1212 platform_set_drvdata(pdev, ctx);
1213
1214 ctx->encoder = exynos_dpi_probe(dev);
1215 if (IS_ERR(ctx->encoder))
1216 return PTR_ERR(ctx->encoder);
1217
1218 pm_runtime_enable(dev);
1219
1220 ret = component_add(dev, &fimd_component_ops);
1221 if (ret)
1222 goto err_disable_pm_runtime;
1223
1224 return ret;
1225
1226 err_disable_pm_runtime:
1227 pm_runtime_disable(dev);
1228
1229 return ret;
1230 }
1231
fimd_remove(struct platform_device * pdev)1232 static int fimd_remove(struct platform_device *pdev)
1233 {
1234 pm_runtime_disable(&pdev->dev);
1235
1236 component_del(&pdev->dev, &fimd_component_ops);
1237
1238 return 0;
1239 }
1240
1241 #ifdef CONFIG_PM
exynos_fimd_suspend(struct device * dev)1242 static int exynos_fimd_suspend(struct device *dev)
1243 {
1244 struct fimd_context *ctx = dev_get_drvdata(dev);
1245
1246 clk_disable_unprepare(ctx->lcd_clk);
1247 clk_disable_unprepare(ctx->bus_clk);
1248
1249 return 0;
1250 }
1251
exynos_fimd_resume(struct device * dev)1252 static int exynos_fimd_resume(struct device *dev)
1253 {
1254 struct fimd_context *ctx = dev_get_drvdata(dev);
1255 int ret;
1256
1257 ret = clk_prepare_enable(ctx->bus_clk);
1258 if (ret < 0) {
1259 DRM_DEV_ERROR(dev,
1260 "Failed to prepare_enable the bus clk [%d]\n",
1261 ret);
1262 return ret;
1263 }
1264
1265 ret = clk_prepare_enable(ctx->lcd_clk);
1266 if (ret < 0) {
1267 DRM_DEV_ERROR(dev,
1268 "Failed to prepare_enable the lcd clk [%d]\n",
1269 ret);
1270 return ret;
1271 }
1272
1273 return 0;
1274 }
1275 #endif
1276
1277 static const struct dev_pm_ops exynos_fimd_pm_ops = {
1278 SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1279 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1280 pm_runtime_force_resume)
1281 };
1282
1283 struct platform_driver fimd_driver = {
1284 .probe = fimd_probe,
1285 .remove = fimd_remove,
1286 .driver = {
1287 .name = "exynos4-fb",
1288 .owner = THIS_MODULE,
1289 .pm = &exynos_fimd_pm_ops,
1290 .of_match_table = fimd_driver_dt_match,
1291 },
1292 };
1293