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 unsigned int has_bgr_support:1;
113 };
114
115 static struct fimd_driver_data s3c64xx_fimd_driver_data = {
116 .timing_base = 0x0,
117 .has_clksel = 1,
118 .has_limited_fmt = 1,
119 };
120
121 static struct fimd_driver_data s5pv210_fimd_driver_data = {
122 .timing_base = 0x0,
123 .has_shadowcon = 1,
124 .has_clksel = 1,
125 };
126
127 static struct fimd_driver_data exynos3_fimd_driver_data = {
128 .timing_base = 0x20000,
129 .lcdblk_offset = 0x210,
130 .lcdblk_bypass_shift = 1,
131 .has_shadowcon = 1,
132 .has_vidoutcon = 1,
133 };
134
135 static struct fimd_driver_data exynos4_fimd_driver_data = {
136 .timing_base = 0x0,
137 .lcdblk_offset = 0x210,
138 .lcdblk_vt_shift = 10,
139 .lcdblk_bypass_shift = 1,
140 .has_shadowcon = 1,
141 .has_vtsel = 1,
142 .has_bgr_support = 1,
143 };
144
145 static struct fimd_driver_data exynos5_fimd_driver_data = {
146 .timing_base = 0x20000,
147 .lcdblk_offset = 0x214,
148 .lcdblk_vt_shift = 24,
149 .lcdblk_bypass_shift = 15,
150 .has_shadowcon = 1,
151 .has_vidoutcon = 1,
152 .has_vtsel = 1,
153 .has_dp_clk = 1,
154 .has_bgr_support = 1,
155 };
156
157 static struct fimd_driver_data exynos5420_fimd_driver_data = {
158 .timing_base = 0x20000,
159 .lcdblk_offset = 0x214,
160 .lcdblk_vt_shift = 24,
161 .lcdblk_bypass_shift = 15,
162 .lcdblk_mic_bypass_shift = 11,
163 .has_shadowcon = 1,
164 .has_vidoutcon = 1,
165 .has_vtsel = 1,
166 .has_mic_bypass = 1,
167 .has_dp_clk = 1,
168 .has_bgr_support = 1,
169 };
170
171 struct fimd_context {
172 struct device *dev;
173 struct drm_device *drm_dev;
174 void *dma_priv;
175 struct exynos_drm_crtc *crtc;
176 struct exynos_drm_plane planes[WINDOWS_NR];
177 struct exynos_drm_plane_config configs[WINDOWS_NR];
178 struct clk *bus_clk;
179 struct clk *lcd_clk;
180 void __iomem *regs;
181 struct regmap *sysreg;
182 unsigned long irq_flags;
183 u32 vidcon0;
184 u32 vidcon1;
185 u32 vidout_con;
186 u32 i80ifcon;
187 bool i80_if;
188 bool suspended;
189 wait_queue_head_t wait_vsync_queue;
190 atomic_t wait_vsync_event;
191 atomic_t win_updated;
192 atomic_t triggering;
193 u32 clkdiv;
194
195 const struct fimd_driver_data *driver_data;
196 struct drm_encoder *encoder;
197 struct exynos_drm_clk dp_clk;
198 };
199
200 static const struct of_device_id fimd_driver_dt_match[] = {
201 { .compatible = "samsung,s3c6400-fimd",
202 .data = &s3c64xx_fimd_driver_data },
203 { .compatible = "samsung,s5pv210-fimd",
204 .data = &s5pv210_fimd_driver_data },
205 { .compatible = "samsung,exynos3250-fimd",
206 .data = &exynos3_fimd_driver_data },
207 { .compatible = "samsung,exynos4210-fimd",
208 .data = &exynos4_fimd_driver_data },
209 { .compatible = "samsung,exynos5250-fimd",
210 .data = &exynos5_fimd_driver_data },
211 { .compatible = "samsung,exynos5420-fimd",
212 .data = &exynos5420_fimd_driver_data },
213 {},
214 };
215 MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
216
217 static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
218 DRM_PLANE_TYPE_PRIMARY,
219 DRM_PLANE_TYPE_OVERLAY,
220 DRM_PLANE_TYPE_OVERLAY,
221 DRM_PLANE_TYPE_OVERLAY,
222 DRM_PLANE_TYPE_CURSOR,
223 };
224
225 static const uint32_t fimd_formats[] = {
226 DRM_FORMAT_C8,
227 DRM_FORMAT_XRGB1555,
228 DRM_FORMAT_RGB565,
229 DRM_FORMAT_XRGB8888,
230 DRM_FORMAT_ARGB8888,
231 };
232
233 static const uint32_t fimd_extended_formats[] = {
234 DRM_FORMAT_C8,
235 DRM_FORMAT_XRGB1555,
236 DRM_FORMAT_XBGR1555,
237 DRM_FORMAT_RGB565,
238 DRM_FORMAT_BGR565,
239 DRM_FORMAT_XRGB8888,
240 DRM_FORMAT_XBGR8888,
241 DRM_FORMAT_ARGB8888,
242 DRM_FORMAT_ABGR8888,
243 };
244
245 static const unsigned int capabilities[WINDOWS_NR] = {
246 0,
247 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
248 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
249 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
250 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
251 };
252
fimd_set_bits(struct fimd_context * ctx,u32 reg,u32 mask,u32 val)253 static inline void fimd_set_bits(struct fimd_context *ctx, u32 reg, u32 mask,
254 u32 val)
255 {
256 val = (val & mask) | (readl(ctx->regs + reg) & ~mask);
257 writel(val, ctx->regs + reg);
258 }
259
fimd_enable_vblank(struct exynos_drm_crtc * crtc)260 static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
261 {
262 struct fimd_context *ctx = crtc->ctx;
263 u32 val;
264
265 if (ctx->suspended)
266 return -EPERM;
267
268 if (!test_and_set_bit(0, &ctx->irq_flags)) {
269 val = readl(ctx->regs + VIDINTCON0);
270
271 val |= VIDINTCON0_INT_ENABLE;
272
273 if (ctx->i80_if) {
274 val |= VIDINTCON0_INT_I80IFDONE;
275 val |= VIDINTCON0_INT_SYSMAINCON;
276 val &= ~VIDINTCON0_INT_SYSSUBCON;
277 } else {
278 val |= VIDINTCON0_INT_FRAME;
279
280 val &= ~VIDINTCON0_FRAMESEL0_MASK;
281 val |= VIDINTCON0_FRAMESEL0_FRONTPORCH;
282 val &= ~VIDINTCON0_FRAMESEL1_MASK;
283 val |= VIDINTCON0_FRAMESEL1_NONE;
284 }
285
286 writel(val, ctx->regs + VIDINTCON0);
287 }
288
289 return 0;
290 }
291
fimd_disable_vblank(struct exynos_drm_crtc * crtc)292 static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
293 {
294 struct fimd_context *ctx = crtc->ctx;
295 u32 val;
296
297 if (ctx->suspended)
298 return;
299
300 if (test_and_clear_bit(0, &ctx->irq_flags)) {
301 val = readl(ctx->regs + VIDINTCON0);
302
303 val &= ~VIDINTCON0_INT_ENABLE;
304
305 if (ctx->i80_if) {
306 val &= ~VIDINTCON0_INT_I80IFDONE;
307 val &= ~VIDINTCON0_INT_SYSMAINCON;
308 val &= ~VIDINTCON0_INT_SYSSUBCON;
309 } else
310 val &= ~VIDINTCON0_INT_FRAME;
311
312 writel(val, ctx->regs + VIDINTCON0);
313 }
314 }
315
fimd_wait_for_vblank(struct exynos_drm_crtc * crtc)316 static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
317 {
318 struct fimd_context *ctx = crtc->ctx;
319
320 if (ctx->suspended)
321 return;
322
323 atomic_set(&ctx->wait_vsync_event, 1);
324
325 /*
326 * wait for FIMD to signal VSYNC interrupt or return after
327 * timeout which is set to 50ms (refresh rate of 20).
328 */
329 if (!wait_event_timeout(ctx->wait_vsync_queue,
330 !atomic_read(&ctx->wait_vsync_event),
331 HZ/20))
332 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
333 }
334
fimd_enable_video_output(struct fimd_context * ctx,unsigned int win,bool enable)335 static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
336 bool enable)
337 {
338 u32 val = readl(ctx->regs + WINCON(win));
339
340 if (enable)
341 val |= WINCONx_ENWIN;
342 else
343 val &= ~WINCONx_ENWIN;
344
345 writel(val, ctx->regs + WINCON(win));
346 }
347
fimd_enable_shadow_channel_path(struct fimd_context * ctx,unsigned int win,bool enable)348 static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
349 unsigned int win,
350 bool enable)
351 {
352 u32 val = readl(ctx->regs + SHADOWCON);
353
354 if (enable)
355 val |= SHADOWCON_CHx_ENABLE(win);
356 else
357 val &= ~SHADOWCON_CHx_ENABLE(win);
358
359 writel(val, ctx->regs + SHADOWCON);
360 }
361
fimd_clear_channels(struct exynos_drm_crtc * crtc)362 static int fimd_clear_channels(struct exynos_drm_crtc *crtc)
363 {
364 struct fimd_context *ctx = crtc->ctx;
365 unsigned int win, ch_enabled = 0;
366 int ret;
367
368 /* Hardware is in unknown state, so ensure it gets enabled properly */
369 ret = pm_runtime_resume_and_get(ctx->dev);
370 if (ret < 0) {
371 dev_err(ctx->dev, "failed to enable FIMD device.\n");
372 return ret;
373 }
374
375 clk_prepare_enable(ctx->bus_clk);
376 clk_prepare_enable(ctx->lcd_clk);
377
378 /* Check if any channel is enabled. */
379 for (win = 0; win < WINDOWS_NR; win++) {
380 u32 val = readl(ctx->regs + WINCON(win));
381
382 if (val & WINCONx_ENWIN) {
383 fimd_enable_video_output(ctx, win, false);
384
385 if (ctx->driver_data->has_shadowcon)
386 fimd_enable_shadow_channel_path(ctx, win,
387 false);
388
389 ch_enabled = 1;
390 }
391 }
392
393 /* Wait for vsync, as disable channel takes effect at next vsync */
394 if (ch_enabled) {
395 ctx->suspended = false;
396
397 fimd_enable_vblank(ctx->crtc);
398 fimd_wait_for_vblank(ctx->crtc);
399 fimd_disable_vblank(ctx->crtc);
400
401 ctx->suspended = true;
402 }
403
404 clk_disable_unprepare(ctx->lcd_clk);
405 clk_disable_unprepare(ctx->bus_clk);
406
407 pm_runtime_put(ctx->dev);
408
409 return 0;
410 }
411
412
fimd_atomic_check(struct exynos_drm_crtc * crtc,struct drm_crtc_state * state)413 static int fimd_atomic_check(struct exynos_drm_crtc *crtc,
414 struct drm_crtc_state *state)
415 {
416 struct drm_display_mode *mode = &state->adjusted_mode;
417 struct fimd_context *ctx = crtc->ctx;
418 unsigned long ideal_clk, lcd_rate;
419 u32 clkdiv;
420
421 if (mode->clock == 0) {
422 DRM_DEV_ERROR(ctx->dev, "Mode has zero clock value.\n");
423 return -EINVAL;
424 }
425
426 ideal_clk = mode->clock * 1000;
427
428 if (ctx->i80_if) {
429 /*
430 * The frame done interrupt should be occurred prior to the
431 * next TE signal.
432 */
433 ideal_clk *= 2;
434 }
435
436 lcd_rate = clk_get_rate(ctx->lcd_clk);
437 if (2 * lcd_rate < ideal_clk) {
438 DRM_DEV_ERROR(ctx->dev,
439 "sclk_fimd clock too low(%lu) for requested pixel clock(%lu)\n",
440 lcd_rate, ideal_clk);
441 return -EINVAL;
442 }
443
444 /* Find the clock divider value that gets us closest to ideal_clk */
445 clkdiv = DIV_ROUND_CLOSEST(lcd_rate, ideal_clk);
446 if (clkdiv >= 0x200) {
447 DRM_DEV_ERROR(ctx->dev, "requested pixel clock(%lu) too low\n",
448 ideal_clk);
449 return -EINVAL;
450 }
451
452 ctx->clkdiv = (clkdiv < 0x100) ? clkdiv : 0xff;
453
454 return 0;
455 }
456
fimd_setup_trigger(struct fimd_context * ctx)457 static void fimd_setup_trigger(struct fimd_context *ctx)
458 {
459 void __iomem *timing_base = ctx->regs + ctx->driver_data->timing_base;
460 u32 trg_type = ctx->driver_data->trg_type;
461 u32 val = readl(timing_base + TRIGCON);
462
463 val &= ~(TRGMODE_ENABLE);
464
465 if (trg_type == I80_HW_TRG) {
466 if (ctx->driver_data->has_hw_trigger)
467 val |= HWTRGEN_ENABLE | HWTRGMASK_ENABLE;
468 if (ctx->driver_data->has_trigger_per_te)
469 val |= HWTRIGEN_PER_ENABLE;
470 } else {
471 val |= TRGMODE_ENABLE;
472 }
473
474 writel(val, timing_base + TRIGCON);
475 }
476
fimd_commit(struct exynos_drm_crtc * crtc)477 static void fimd_commit(struct exynos_drm_crtc *crtc)
478 {
479 struct fimd_context *ctx = crtc->ctx;
480 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
481 const struct fimd_driver_data *driver_data = ctx->driver_data;
482 void *timing_base = ctx->regs + driver_data->timing_base;
483 u32 val;
484
485 if (ctx->suspended)
486 return;
487
488 /* nothing to do if we haven't set the mode yet */
489 if (mode->htotal == 0 || mode->vtotal == 0)
490 return;
491
492 if (ctx->i80_if) {
493 val = ctx->i80ifcon | I80IFEN_ENABLE;
494 writel(val, timing_base + I80IFCONFAx(0));
495
496 /* disable auto frame rate */
497 writel(0, timing_base + I80IFCONFBx(0));
498
499 /* set video type selection to I80 interface */
500 if (driver_data->has_vtsel && ctx->sysreg &&
501 regmap_update_bits(ctx->sysreg,
502 driver_data->lcdblk_offset,
503 0x3 << driver_data->lcdblk_vt_shift,
504 0x1 << driver_data->lcdblk_vt_shift)) {
505 DRM_DEV_ERROR(ctx->dev,
506 "Failed to update sysreg for I80 i/f.\n");
507 return;
508 }
509 } else {
510 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
511 u32 vidcon1;
512
513 /* setup polarity values */
514 vidcon1 = ctx->vidcon1;
515 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
516 vidcon1 |= VIDCON1_INV_VSYNC;
517 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
518 vidcon1 |= VIDCON1_INV_HSYNC;
519 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
520
521 /* setup vertical timing values. */
522 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
523 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
524 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
525
526 val = VIDTCON0_VBPD(vbpd - 1) |
527 VIDTCON0_VFPD(vfpd - 1) |
528 VIDTCON0_VSPW(vsync_len - 1);
529 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
530
531 /* setup horizontal timing values. */
532 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
533 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
534 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
535
536 val = VIDTCON1_HBPD(hbpd - 1) |
537 VIDTCON1_HFPD(hfpd - 1) |
538 VIDTCON1_HSPW(hsync_len - 1);
539 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
540 }
541
542 if (driver_data->has_vidoutcon)
543 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
544
545 /* set bypass selection */
546 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
547 driver_data->lcdblk_offset,
548 0x1 << driver_data->lcdblk_bypass_shift,
549 0x1 << driver_data->lcdblk_bypass_shift)) {
550 DRM_DEV_ERROR(ctx->dev,
551 "Failed to update sysreg for bypass setting.\n");
552 return;
553 }
554
555 /* TODO: When MIC is enabled for display path, the lcdblk_mic_bypass
556 * bit should be cleared.
557 */
558 if (driver_data->has_mic_bypass && ctx->sysreg &&
559 regmap_update_bits(ctx->sysreg,
560 driver_data->lcdblk_offset,
561 0x1 << driver_data->lcdblk_mic_bypass_shift,
562 0x1 << driver_data->lcdblk_mic_bypass_shift)) {
563 DRM_DEV_ERROR(ctx->dev,
564 "Failed to update sysreg for bypass mic.\n");
565 return;
566 }
567
568 /* setup horizontal and vertical display size. */
569 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
570 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
571 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
572 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
573 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
574
575 fimd_setup_trigger(ctx);
576
577 /*
578 * fields of register with prefix '_F' would be updated
579 * at vsync(same as dma start)
580 */
581 val = ctx->vidcon0;
582 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
583
584 if (ctx->driver_data->has_clksel)
585 val |= VIDCON0_CLKSEL_LCD;
586
587 if (ctx->clkdiv > 1)
588 val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR;
589
590 writel(val, ctx->regs + VIDCON0);
591 }
592
fimd_win_set_bldeq(struct fimd_context * ctx,unsigned int win,unsigned int alpha,unsigned int pixel_alpha)593 static void fimd_win_set_bldeq(struct fimd_context *ctx, unsigned int win,
594 unsigned int alpha, unsigned int pixel_alpha)
595 {
596 u32 mask = BLENDEQ_A_FUNC_F(0xf) | BLENDEQ_B_FUNC_F(0xf);
597 u32 val = 0;
598
599 switch (pixel_alpha) {
600 case DRM_MODE_BLEND_PIXEL_NONE:
601 case DRM_MODE_BLEND_COVERAGE:
602 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ALPHA_A);
603 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
604 break;
605 case DRM_MODE_BLEND_PREMULTI:
606 default:
607 if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
608 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ALPHA0);
609 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
610 } else {
611 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ONE);
612 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
613 }
614 break;
615 }
616 fimd_set_bits(ctx, BLENDEQx(win), mask, val);
617 }
618
fimd_win_set_bldmod(struct fimd_context * ctx,unsigned int win,unsigned int alpha,unsigned int pixel_alpha)619 static void fimd_win_set_bldmod(struct fimd_context *ctx, unsigned int win,
620 unsigned int alpha, unsigned int pixel_alpha)
621 {
622 u32 win_alpha_l = (alpha >> 8) & 0xf;
623 u32 win_alpha_h = alpha >> 12;
624 u32 val = 0;
625
626 switch (pixel_alpha) {
627 case DRM_MODE_BLEND_PIXEL_NONE:
628 break;
629 case DRM_MODE_BLEND_COVERAGE:
630 case DRM_MODE_BLEND_PREMULTI:
631 default:
632 val |= WINCON1_ALPHA_SEL;
633 val |= WINCON1_BLD_PIX;
634 val |= WINCON1_ALPHA_MUL;
635 break;
636 }
637 fimd_set_bits(ctx, WINCON(win), WINCONx_BLEND_MODE_MASK, val);
638
639 /* OSD alpha */
640 val = VIDISD14C_ALPHA0_R(win_alpha_h) |
641 VIDISD14C_ALPHA0_G(win_alpha_h) |
642 VIDISD14C_ALPHA0_B(win_alpha_h) |
643 VIDISD14C_ALPHA1_R(0x0) |
644 VIDISD14C_ALPHA1_G(0x0) |
645 VIDISD14C_ALPHA1_B(0x0);
646 writel(val, ctx->regs + VIDOSD_C(win));
647
648 val = VIDW_ALPHA_R(win_alpha_l) | VIDW_ALPHA_G(win_alpha_l) |
649 VIDW_ALPHA_B(win_alpha_l);
650 writel(val, ctx->regs + VIDWnALPHA0(win));
651
652 val = VIDW_ALPHA_R(0x0) | VIDW_ALPHA_G(0x0) |
653 VIDW_ALPHA_B(0x0);
654 writel(val, ctx->regs + VIDWnALPHA1(win));
655
656 fimd_set_bits(ctx, BLENDCON, BLENDCON_NEW_MASK,
657 BLENDCON_NEW_8BIT_ALPHA_VALUE);
658 }
659
fimd_win_set_pixfmt(struct fimd_context * ctx,unsigned int win,struct drm_framebuffer * fb,int width)660 static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
661 struct drm_framebuffer *fb, int width)
662 {
663 struct exynos_drm_plane plane = ctx->planes[win];
664 struct exynos_drm_plane_state *state =
665 to_exynos_plane_state(plane.base.state);
666 uint32_t pixel_format = fb->format->format;
667 unsigned int alpha = state->base.alpha;
668 u32 val = WINCONx_ENWIN;
669 unsigned int pixel_alpha;
670
671 if (fb->format->has_alpha)
672 pixel_alpha = state->base.pixel_blend_mode;
673 else
674 pixel_alpha = DRM_MODE_BLEND_PIXEL_NONE;
675
676 /*
677 * In case of s3c64xx, window 0 doesn't support alpha channel.
678 * So the request format is ARGB8888 then change it to XRGB8888.
679 */
680 if (ctx->driver_data->has_limited_fmt && !win) {
681 if (pixel_format == DRM_FORMAT_ARGB8888)
682 pixel_format = DRM_FORMAT_XRGB8888;
683 }
684
685 switch (pixel_format) {
686 case DRM_FORMAT_C8:
687 val |= WINCON0_BPPMODE_8BPP_PALETTE;
688 val |= WINCONx_BURSTLEN_8WORD;
689 val |= WINCONx_BYTSWP;
690 break;
691 case DRM_FORMAT_XRGB1555:
692 case DRM_FORMAT_XBGR1555:
693 val |= WINCON0_BPPMODE_16BPP_1555;
694 val |= WINCONx_HAWSWP;
695 val |= WINCONx_BURSTLEN_16WORD;
696 break;
697 case DRM_FORMAT_RGB565:
698 case DRM_FORMAT_BGR565:
699 val |= WINCON0_BPPMODE_16BPP_565;
700 val |= WINCONx_HAWSWP;
701 val |= WINCONx_BURSTLEN_16WORD;
702 break;
703 case DRM_FORMAT_XRGB8888:
704 case DRM_FORMAT_XBGR8888:
705 val |= WINCON0_BPPMODE_24BPP_888;
706 val |= WINCONx_WSWP;
707 val |= WINCONx_BURSTLEN_16WORD;
708 break;
709 case DRM_FORMAT_ARGB8888:
710 case DRM_FORMAT_ABGR8888:
711 default:
712 val |= WINCON1_BPPMODE_25BPP_A1888;
713 val |= WINCONx_WSWP;
714 val |= WINCONx_BURSTLEN_16WORD;
715 break;
716 }
717
718 switch (pixel_format) {
719 case DRM_FORMAT_XBGR1555:
720 case DRM_FORMAT_XBGR8888:
721 case DRM_FORMAT_ABGR8888:
722 case DRM_FORMAT_BGR565:
723 writel(WIN_RGB_ORDER_REVERSE, ctx->regs + WIN_RGB_ORDER(win));
724 break;
725 default:
726 writel(WIN_RGB_ORDER_FORWARD, ctx->regs + WIN_RGB_ORDER(win));
727 break;
728 }
729
730 /*
731 * Setting dma-burst to 16Word causes permanent tearing for very small
732 * buffers, e.g. cursor buffer. Burst Mode switching which based on
733 * plane size is not recommended as plane size varies alot towards the
734 * end of the screen and rapid movement causes unstable DMA, but it is
735 * still better to change dma-burst than displaying garbage.
736 */
737
738 if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
739 val &= ~WINCONx_BURSTLEN_MASK;
740 val |= WINCONx_BURSTLEN_4WORD;
741 }
742 fimd_set_bits(ctx, WINCON(win), ~WINCONx_BLEND_MODE_MASK, val);
743
744 /* hardware window 0 doesn't support alpha channel. */
745 if (win != 0) {
746 fimd_win_set_bldmod(ctx, win, alpha, pixel_alpha);
747 fimd_win_set_bldeq(ctx, win, alpha, pixel_alpha);
748 }
749 }
750
fimd_win_set_colkey(struct fimd_context * ctx,unsigned int win)751 static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
752 {
753 unsigned int keycon0 = 0, keycon1 = 0;
754
755 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
756 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
757
758 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
759
760 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
761 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
762 }
763
764 /**
765 * fimd_shadow_protect_win() - disable updating values from shadow registers at vsync
766 *
767 * @ctx: local driver data
768 * @win: window to protect registers for
769 * @protect: 1 to protect (disable updates)
770 */
fimd_shadow_protect_win(struct fimd_context * ctx,unsigned int win,bool protect)771 static void fimd_shadow_protect_win(struct fimd_context *ctx,
772 unsigned int win, bool protect)
773 {
774 u32 reg, bits, val;
775
776 /*
777 * SHADOWCON/PRTCON register is used for enabling timing.
778 *
779 * for example, once only width value of a register is set,
780 * if the dma is started then fimd hardware could malfunction so
781 * with protect window setting, the register fields with prefix '_F'
782 * wouldn't be updated at vsync also but updated once unprotect window
783 * is set.
784 */
785
786 if (ctx->driver_data->has_shadowcon) {
787 reg = SHADOWCON;
788 bits = SHADOWCON_WINx_PROTECT(win);
789 } else {
790 reg = PRTCON;
791 bits = PRTCON_PROTECT;
792 }
793
794 val = readl(ctx->regs + reg);
795 if (protect)
796 val |= bits;
797 else
798 val &= ~bits;
799 writel(val, ctx->regs + reg);
800 }
801
fimd_atomic_begin(struct exynos_drm_crtc * crtc)802 static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
803 {
804 struct fimd_context *ctx = crtc->ctx;
805 int i;
806
807 if (ctx->suspended)
808 return;
809
810 for (i = 0; i < WINDOWS_NR; i++)
811 fimd_shadow_protect_win(ctx, i, true);
812 }
813
fimd_atomic_flush(struct exynos_drm_crtc * crtc)814 static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
815 {
816 struct fimd_context *ctx = crtc->ctx;
817 int i;
818
819 if (ctx->suspended)
820 return;
821
822 for (i = 0; i < WINDOWS_NR; i++)
823 fimd_shadow_protect_win(ctx, i, false);
824
825 exynos_crtc_handle_event(crtc);
826 }
827
fimd_update_plane(struct exynos_drm_crtc * crtc,struct exynos_drm_plane * plane)828 static void fimd_update_plane(struct exynos_drm_crtc *crtc,
829 struct exynos_drm_plane *plane)
830 {
831 struct exynos_drm_plane_state *state =
832 to_exynos_plane_state(plane->base.state);
833 struct fimd_context *ctx = crtc->ctx;
834 struct drm_framebuffer *fb = state->base.fb;
835 dma_addr_t dma_addr;
836 unsigned long val, size, offset;
837 unsigned int last_x, last_y, buf_offsize, line_size;
838 unsigned int win = plane->index;
839 unsigned int cpp = fb->format->cpp[0];
840 unsigned int pitch = fb->pitches[0];
841
842 if (ctx->suspended)
843 return;
844
845 offset = state->src.x * cpp;
846 offset += state->src.y * pitch;
847
848 /* buffer start address */
849 dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
850 val = (unsigned long)dma_addr;
851 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
852
853 /* buffer end address */
854 size = pitch * state->crtc.h;
855 val = (unsigned long)(dma_addr + size);
856 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
857
858 DRM_DEV_DEBUG_KMS(ctx->dev,
859 "start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
860 (unsigned long)dma_addr, val, size);
861 DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
862 state->crtc.w, state->crtc.h);
863
864 /* buffer size */
865 buf_offsize = pitch - (state->crtc.w * cpp);
866 line_size = state->crtc.w * cpp;
867 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
868 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
869 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
870 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
871 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
872
873 /* OSD position */
874 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
875 VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
876 VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
877 VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
878 writel(val, ctx->regs + VIDOSD_A(win));
879
880 last_x = state->crtc.x + state->crtc.w;
881 if (last_x)
882 last_x--;
883 last_y = state->crtc.y + state->crtc.h;
884 if (last_y)
885 last_y--;
886
887 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
888 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
889
890 writel(val, ctx->regs + VIDOSD_B(win));
891
892 DRM_DEV_DEBUG_KMS(ctx->dev,
893 "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
894 state->crtc.x, state->crtc.y, last_x, last_y);
895
896 /* OSD size */
897 if (win != 3 && win != 4) {
898 u32 offset = VIDOSD_D(win);
899 if (win == 0)
900 offset = VIDOSD_C(win);
901 val = state->crtc.w * state->crtc.h;
902 writel(val, ctx->regs + offset);
903
904 DRM_DEV_DEBUG_KMS(ctx->dev, "osd size = 0x%x\n",
905 (unsigned int)val);
906 }
907
908 fimd_win_set_pixfmt(ctx, win, fb, state->src.w);
909
910 /* hardware window 0 doesn't support color key. */
911 if (win != 0)
912 fimd_win_set_colkey(ctx, win);
913
914 fimd_enable_video_output(ctx, win, true);
915
916 if (ctx->driver_data->has_shadowcon)
917 fimd_enable_shadow_channel_path(ctx, win, true);
918
919 if (ctx->i80_if)
920 atomic_set(&ctx->win_updated, 1);
921 }
922
fimd_disable_plane(struct exynos_drm_crtc * crtc,struct exynos_drm_plane * plane)923 static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
924 struct exynos_drm_plane *plane)
925 {
926 struct fimd_context *ctx = crtc->ctx;
927 unsigned int win = plane->index;
928
929 if (ctx->suspended)
930 return;
931
932 fimd_enable_video_output(ctx, win, false);
933
934 if (ctx->driver_data->has_shadowcon)
935 fimd_enable_shadow_channel_path(ctx, win, false);
936 }
937
fimd_atomic_enable(struct exynos_drm_crtc * crtc)938 static void fimd_atomic_enable(struct exynos_drm_crtc *crtc)
939 {
940 struct fimd_context *ctx = crtc->ctx;
941
942 if (!ctx->suspended)
943 return;
944
945 ctx->suspended = false;
946
947 if (pm_runtime_resume_and_get(ctx->dev) < 0) {
948 dev_warn(ctx->dev, "failed to enable FIMD device.\n");
949 return;
950 }
951
952 /* if vblank was enabled status, enable it again. */
953 if (test_and_clear_bit(0, &ctx->irq_flags))
954 fimd_enable_vblank(ctx->crtc);
955
956 fimd_commit(ctx->crtc);
957 }
958
fimd_atomic_disable(struct exynos_drm_crtc * crtc)959 static void fimd_atomic_disable(struct exynos_drm_crtc *crtc)
960 {
961 struct fimd_context *ctx = crtc->ctx;
962 int i;
963
964 if (ctx->suspended)
965 return;
966
967 /*
968 * We need to make sure that all windows are disabled before we
969 * suspend that connector. Otherwise we might try to scan from
970 * a destroyed buffer later.
971 */
972 for (i = 0; i < WINDOWS_NR; i++)
973 fimd_disable_plane(crtc, &ctx->planes[i]);
974
975 fimd_enable_vblank(crtc);
976 fimd_wait_for_vblank(crtc);
977 fimd_disable_vblank(crtc);
978
979 writel(0, ctx->regs + VIDCON0);
980
981 pm_runtime_put_sync(ctx->dev);
982 ctx->suspended = true;
983 }
984
fimd_trigger(struct device * dev)985 static void fimd_trigger(struct device *dev)
986 {
987 struct fimd_context *ctx = dev_get_drvdata(dev);
988 const struct fimd_driver_data *driver_data = ctx->driver_data;
989 void *timing_base = ctx->regs + driver_data->timing_base;
990 u32 reg;
991
992 /*
993 * Skips triggering if in triggering state, because multiple triggering
994 * requests can cause panel reset.
995 */
996 if (atomic_read(&ctx->triggering))
997 return;
998
999 /* Enters triggering mode */
1000 atomic_set(&ctx->triggering, 1);
1001
1002 reg = readl(timing_base + TRIGCON);
1003 reg |= (TRGMODE_ENABLE | SWTRGCMD_ENABLE);
1004 writel(reg, timing_base + TRIGCON);
1005
1006 /*
1007 * Exits triggering mode if vblank is not enabled yet, because when the
1008 * VIDINTCON0 register is not set, it can not exit from triggering mode.
1009 */
1010 if (!test_bit(0, &ctx->irq_flags))
1011 atomic_set(&ctx->triggering, 0);
1012 }
1013
fimd_te_handler(struct exynos_drm_crtc * crtc)1014 static void fimd_te_handler(struct exynos_drm_crtc *crtc)
1015 {
1016 struct fimd_context *ctx = crtc->ctx;
1017 u32 trg_type = ctx->driver_data->trg_type;
1018
1019 /* Checks the crtc is detached already from encoder */
1020 if (!ctx->drm_dev)
1021 return;
1022
1023 if (trg_type == I80_HW_TRG)
1024 goto out;
1025
1026 /*
1027 * If there is a page flip request, triggers and handles the page flip
1028 * event so that current fb can be updated into panel GRAM.
1029 */
1030 if (atomic_add_unless(&ctx->win_updated, -1, 0))
1031 fimd_trigger(ctx->dev);
1032
1033 out:
1034 /* Wakes up vsync event queue */
1035 if (atomic_read(&ctx->wait_vsync_event)) {
1036 atomic_set(&ctx->wait_vsync_event, 0);
1037 wake_up(&ctx->wait_vsync_queue);
1038 }
1039
1040 if (test_bit(0, &ctx->irq_flags))
1041 drm_crtc_handle_vblank(&ctx->crtc->base);
1042 }
1043
fimd_dp_clock_enable(struct exynos_drm_clk * clk,bool enable)1044 static void fimd_dp_clock_enable(struct exynos_drm_clk *clk, bool enable)
1045 {
1046 struct fimd_context *ctx = container_of(clk, struct fimd_context,
1047 dp_clk);
1048 u32 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
1049 writel(val, ctx->regs + DP_MIE_CLKCON);
1050 }
1051
1052 static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
1053 .atomic_enable = fimd_atomic_enable,
1054 .atomic_disable = fimd_atomic_disable,
1055 .enable_vblank = fimd_enable_vblank,
1056 .disable_vblank = fimd_disable_vblank,
1057 .atomic_begin = fimd_atomic_begin,
1058 .update_plane = fimd_update_plane,
1059 .disable_plane = fimd_disable_plane,
1060 .atomic_flush = fimd_atomic_flush,
1061 .atomic_check = fimd_atomic_check,
1062 .te_handler = fimd_te_handler,
1063 };
1064
fimd_irq_handler(int irq,void * dev_id)1065 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
1066 {
1067 struct fimd_context *ctx = (struct fimd_context *)dev_id;
1068 u32 val, clear_bit;
1069
1070 val = readl(ctx->regs + VIDINTCON1);
1071
1072 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
1073 if (val & clear_bit)
1074 writel(clear_bit, ctx->regs + VIDINTCON1);
1075
1076 /* check the crtc is detached already from encoder */
1077 if (!ctx->drm_dev)
1078 goto out;
1079
1080 if (!ctx->i80_if)
1081 drm_crtc_handle_vblank(&ctx->crtc->base);
1082
1083 if (ctx->i80_if) {
1084 /* Exits triggering mode */
1085 atomic_set(&ctx->triggering, 0);
1086 } else {
1087 /* set wait vsync event to zero and wake up queue. */
1088 if (atomic_read(&ctx->wait_vsync_event)) {
1089 atomic_set(&ctx->wait_vsync_event, 0);
1090 wake_up(&ctx->wait_vsync_queue);
1091 }
1092 }
1093
1094 out:
1095 return IRQ_HANDLED;
1096 }
1097
fimd_bind(struct device * dev,struct device * master,void * data)1098 static int fimd_bind(struct device *dev, struct device *master, void *data)
1099 {
1100 struct fimd_context *ctx = dev_get_drvdata(dev);
1101 struct drm_device *drm_dev = data;
1102 struct exynos_drm_plane *exynos_plane;
1103 unsigned int i;
1104 int ret;
1105
1106 ctx->drm_dev = drm_dev;
1107
1108 for (i = 0; i < WINDOWS_NR; i++) {
1109 if (ctx->driver_data->has_bgr_support) {
1110 ctx->configs[i].pixel_formats = fimd_extended_formats;
1111 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_extended_formats);
1112 } else {
1113 ctx->configs[i].pixel_formats = fimd_formats;
1114 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
1115 }
1116
1117 ctx->configs[i].zpos = i;
1118 ctx->configs[i].type = fimd_win_types[i];
1119 ctx->configs[i].capabilities = capabilities[i];
1120 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
1121 &ctx->configs[i]);
1122 if (ret)
1123 return ret;
1124 }
1125
1126 exynos_plane = &ctx->planes[DEFAULT_WIN];
1127 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
1128 EXYNOS_DISPLAY_TYPE_LCD, &fimd_crtc_ops, ctx);
1129 if (IS_ERR(ctx->crtc))
1130 return PTR_ERR(ctx->crtc);
1131
1132 if (ctx->driver_data->has_dp_clk) {
1133 ctx->dp_clk.enable = fimd_dp_clock_enable;
1134 ctx->crtc->pipe_clk = &ctx->dp_clk;
1135 }
1136
1137 if (ctx->encoder)
1138 exynos_dpi_bind(drm_dev, ctx->encoder);
1139
1140 if (is_drm_iommu_supported(drm_dev)) {
1141 int ret;
1142
1143 ret = fimd_clear_channels(ctx->crtc);
1144 if (ret < 0)
1145 return ret;
1146 }
1147
1148 return exynos_drm_register_dma(drm_dev, dev, &ctx->dma_priv);
1149 }
1150
fimd_unbind(struct device * dev,struct device * master,void * data)1151 static void fimd_unbind(struct device *dev, struct device *master,
1152 void *data)
1153 {
1154 struct fimd_context *ctx = dev_get_drvdata(dev);
1155
1156 fimd_atomic_disable(ctx->crtc);
1157
1158 exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv);
1159
1160 if (ctx->encoder)
1161 exynos_dpi_remove(ctx->encoder);
1162 }
1163
1164 static const struct component_ops fimd_component_ops = {
1165 .bind = fimd_bind,
1166 .unbind = fimd_unbind,
1167 };
1168
fimd_probe(struct platform_device * pdev)1169 static int fimd_probe(struct platform_device *pdev)
1170 {
1171 struct device *dev = &pdev->dev;
1172 struct fimd_context *ctx;
1173 struct device_node *i80_if_timings;
1174 int ret;
1175
1176 if (!dev->of_node)
1177 return -ENODEV;
1178
1179 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1180 if (!ctx)
1181 return -ENOMEM;
1182
1183 ctx->dev = dev;
1184 ctx->suspended = true;
1185 ctx->driver_data = of_device_get_match_data(dev);
1186
1187 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1188 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1189 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1190 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1191
1192 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1193 if (i80_if_timings) {
1194 u32 val;
1195
1196 ctx->i80_if = true;
1197
1198 if (ctx->driver_data->has_vidoutcon)
1199 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1200 else
1201 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1202 /*
1203 * The user manual describes that this "DSI_EN" bit is required
1204 * to enable I80 24-bit data interface.
1205 */
1206 ctx->vidcon0 |= VIDCON0_DSI_EN;
1207
1208 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1209 val = 0;
1210 ctx->i80ifcon = LCD_CS_SETUP(val);
1211 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1212 val = 0;
1213 ctx->i80ifcon |= LCD_WR_SETUP(val);
1214 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1215 val = 1;
1216 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1217 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1218 val = 0;
1219 ctx->i80ifcon |= LCD_WR_HOLD(val);
1220 }
1221 of_node_put(i80_if_timings);
1222
1223 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1224 "samsung,sysreg");
1225 if (IS_ERR(ctx->sysreg)) {
1226 dev_warn(dev, "failed to get system register.\n");
1227 ctx->sysreg = NULL;
1228 }
1229
1230 ctx->bus_clk = devm_clk_get(dev, "fimd");
1231 if (IS_ERR(ctx->bus_clk)) {
1232 dev_err(dev, "failed to get bus clock\n");
1233 return PTR_ERR(ctx->bus_clk);
1234 }
1235
1236 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1237 if (IS_ERR(ctx->lcd_clk)) {
1238 dev_err(dev, "failed to get lcd clock\n");
1239 return PTR_ERR(ctx->lcd_clk);
1240 }
1241
1242 ctx->regs = devm_platform_ioremap_resource(pdev, 0);
1243 if (IS_ERR(ctx->regs))
1244 return PTR_ERR(ctx->regs);
1245
1246 ret = platform_get_irq_byname(pdev, ctx->i80_if ? "lcd_sys" : "vsync");
1247 if (ret < 0)
1248 return ret;
1249
1250 ret = devm_request_irq(dev, ret, fimd_irq_handler, 0, "drm_fimd", ctx);
1251 if (ret) {
1252 dev_err(dev, "irq request failed.\n");
1253 return ret;
1254 }
1255
1256 init_waitqueue_head(&ctx->wait_vsync_queue);
1257 atomic_set(&ctx->wait_vsync_event, 0);
1258
1259 platform_set_drvdata(pdev, ctx);
1260
1261 ctx->encoder = exynos_dpi_probe(dev);
1262 if (IS_ERR(ctx->encoder))
1263 return PTR_ERR(ctx->encoder);
1264
1265 pm_runtime_enable(dev);
1266
1267 ret = component_add(dev, &fimd_component_ops);
1268 if (ret)
1269 goto err_disable_pm_runtime;
1270
1271 return ret;
1272
1273 err_disable_pm_runtime:
1274 pm_runtime_disable(dev);
1275
1276 return ret;
1277 }
1278
fimd_remove(struct platform_device * pdev)1279 static int fimd_remove(struct platform_device *pdev)
1280 {
1281 pm_runtime_disable(&pdev->dev);
1282
1283 component_del(&pdev->dev, &fimd_component_ops);
1284
1285 return 0;
1286 }
1287
1288 #ifdef CONFIG_PM
exynos_fimd_suspend(struct device * dev)1289 static int exynos_fimd_suspend(struct device *dev)
1290 {
1291 struct fimd_context *ctx = dev_get_drvdata(dev);
1292
1293 clk_disable_unprepare(ctx->lcd_clk);
1294 clk_disable_unprepare(ctx->bus_clk);
1295
1296 return 0;
1297 }
1298
exynos_fimd_resume(struct device * dev)1299 static int exynos_fimd_resume(struct device *dev)
1300 {
1301 struct fimd_context *ctx = dev_get_drvdata(dev);
1302 int ret;
1303
1304 ret = clk_prepare_enable(ctx->bus_clk);
1305 if (ret < 0) {
1306 DRM_DEV_ERROR(dev,
1307 "Failed to prepare_enable the bus clk [%d]\n",
1308 ret);
1309 return ret;
1310 }
1311
1312 ret = clk_prepare_enable(ctx->lcd_clk);
1313 if (ret < 0) {
1314 DRM_DEV_ERROR(dev,
1315 "Failed to prepare_enable the lcd clk [%d]\n",
1316 ret);
1317 return ret;
1318 }
1319
1320 return 0;
1321 }
1322 #endif
1323
1324 static const struct dev_pm_ops exynos_fimd_pm_ops = {
1325 SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1326 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1327 pm_runtime_force_resume)
1328 };
1329
1330 struct platform_driver fimd_driver = {
1331 .probe = fimd_probe,
1332 .remove = fimd_remove,
1333 .driver = {
1334 .name = "exynos4-fb",
1335 .owner = THIS_MODULE,
1336 .pm = &exynos_fimd_pm_ops,
1337 .of_match_table = fimd_driver_dt_match,
1338 },
1339 };
1340