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mmc: host: sh_mobile_sdhi: don't populate unneeded functions
[linux/fpc-iii.git] / drivers / gpu / drm / exynos / exynos_drm_fimd.c
blobd4721648898524e9dc76ee6476dd9a068c52520a
1 /* exynos_drm_fimd.c
2 *
3 * Copyright (C) 2011 Samsung Electronics Co.Ltd
4 * Authors:
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Inki Dae <inki.dae@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14 #include <drm/drmP.h>
15
16 #include <linux/kernel.h>
17 #include <linux/platform_device.h>
18 #include <linux/clk.h>
19 #include <linux/of.h>
20 #include <linux/of_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/component.h>
23 #include <linux/mfd/syscon.h>
24 #include <linux/regmap.h>
25
26 #include <video/of_display_timing.h>
27 #include <video/of_videomode.h>
28 #include <video/samsung_fimd.h>
29 #include <drm/exynos_drm.h>
30
31 #include "exynos_drm_drv.h"
32 #include "exynos_drm_fb.h"
33 #include "exynos_drm_crtc.h"
34 #include "exynos_drm_plane.h"
35 #include "exynos_drm_iommu.h"
36
37 /*
38 * FIMD stands for Fully Interactive Mobile Display and
39 * as a display controller, it transfers contents drawn on memory
40 * to a LCD Panel through Display Interfaces such as RGB or
41 * CPU Interface.
42 */
43
44 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
45
46 /* position control register for hardware window 0, 2 ~ 4.*/
47 #define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16)
48 #define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16)
49 /*
50 * size control register for hardware windows 0 and alpha control register
51 * for hardware windows 1 ~ 4
52 */
53 #define VIDOSD_C(win) (VIDOSD_BASE + 0x08 + (win) * 16)
54 /* size control register for hardware windows 1 ~ 2. */
55 #define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16)
56
57 #define VIDWnALPHA0(win) (VIDW_ALPHA + 0x00 + (win) * 8)
58 #define VIDWnALPHA1(win) (VIDW_ALPHA + 0x04 + (win) * 8)
59
60 #define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8)
61 #define VIDWx_BUF_START_S(win, buf) (VIDW_BUF_START_S(buf) + (win) * 8)
62 #define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8)
63 #define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4)
64
65 /* color key control register for hardware window 1 ~ 4. */
66 #define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + ((x - 1) * 8))
67 /* color key value register for hardware window 1 ~ 4. */
68 #define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + ((x - 1) * 8))
69
70 /* I80 trigger control register */
71 #define TRIGCON 0x1A4
72 #define TRGMODE_ENABLE (1 << 0)
73 #define SWTRGCMD_ENABLE (1 << 1)
74 /* Exynos3250, 3472, 4415, 5260 5410, 5420 and 5422 only supported. */
75 #define HWTRGEN_ENABLE (1 << 3)
76 #define HWTRGMASK_ENABLE (1 << 4)
77 /* Exynos3250, 3472, 4415, 5260, 5420 and 5422 only supported. */
78 #define HWTRIGEN_PER_ENABLE (1 << 31)
79
80 /* display mode change control register except exynos4 */
81 #define VIDOUT_CON 0x000
82 #define VIDOUT_CON_F_I80_LDI0 (0x2 << 8)
83
84 /* I80 interface control for main LDI register */
85 #define I80IFCONFAx(x) (0x1B0 + (x) * 4)
86 #define I80IFCONFBx(x) (0x1B8 + (x) * 4)
87 #define LCD_CS_SETUP(x) ((x) << 16)
88 #define LCD_WR_SETUP(x) ((x) << 12)
89 #define LCD_WR_ACTIVE(x) ((x) << 8)
90 #define LCD_WR_HOLD(x) ((x) << 4)
91 #define I80IFEN_ENABLE (1 << 0)
92
93 /* FIMD has totally five hardware windows. */
94 #define WINDOWS_NR 5
95
96 /* HW trigger flag on i80 panel. */
97 #define I80_HW_TRG (1 << 1)
98
99 struct fimd_driver_data {
100 unsigned int timing_base;
101 unsigned int lcdblk_offset;
102 unsigned int lcdblk_vt_shift;
103 unsigned int lcdblk_bypass_shift;
104 unsigned int lcdblk_mic_bypass_shift;
105 unsigned int trg_type;
106
107 unsigned int has_shadowcon:1;
108 unsigned int has_clksel:1;
109 unsigned int has_limited_fmt:1;
110 unsigned int has_vidoutcon:1;
111 unsigned int has_vtsel:1;
112 unsigned int has_mic_bypass:1;
113 unsigned int has_dp_clk:1;
114 unsigned int has_hw_trigger:1;
115 unsigned int has_trigger_per_te:1;
116 };
117
118 static struct fimd_driver_data s3c64xx_fimd_driver_data = {
119 .timing_base = 0x0,
120 .has_clksel = 1,
121 .has_limited_fmt = 1,
122 };
123
124 static struct fimd_driver_data exynos3_fimd_driver_data = {
125 .timing_base = 0x20000,
126 .lcdblk_offset = 0x210,
127 .lcdblk_bypass_shift = 1,
128 .trg_type = I80_HW_TRG,
129 .has_shadowcon = 1,
130 .has_vidoutcon = 1,
131 .has_trigger_per_te = 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 exynos4415_fimd_driver_data = {
144 .timing_base = 0x20000,
145 .lcdblk_offset = 0x210,
146 .lcdblk_vt_shift = 10,
147 .lcdblk_bypass_shift = 1,
148 .trg_type = I80_HW_TRG,
149 .has_shadowcon = 1,
150 .has_vidoutcon = 1,
151 .has_vtsel = 1,
152 .has_trigger_per_te = 1,
153 };
154
155 static struct fimd_driver_data exynos5_fimd_driver_data = {
156 .timing_base = 0x20000,
157 .lcdblk_offset = 0x214,
158 .lcdblk_vt_shift = 24,
159 .lcdblk_bypass_shift = 15,
160 .has_shadowcon = 1,
161 .has_vidoutcon = 1,
162 .has_vtsel = 1,
163 .has_dp_clk = 1,
164 };
165
166 static struct fimd_driver_data exynos5420_fimd_driver_data = {
167 .timing_base = 0x20000,
168 .lcdblk_offset = 0x214,
169 .lcdblk_vt_shift = 24,
170 .lcdblk_bypass_shift = 15,
171 .lcdblk_mic_bypass_shift = 11,
172 .has_shadowcon = 1,
173 .has_vidoutcon = 1,
174 .has_vtsel = 1,
175 .has_mic_bypass = 1,
176 .has_dp_clk = 1,
177 };
178
179 struct fimd_context {
180 struct device *dev;
181 struct drm_device *drm_dev;
182 struct exynos_drm_crtc *crtc;
183 struct exynos_drm_plane planes[WINDOWS_NR];
184 struct exynos_drm_plane_config configs[WINDOWS_NR];
185 struct clk *bus_clk;
186 struct clk *lcd_clk;
187 void __iomem *regs;
188 struct regmap *sysreg;
189 unsigned long irq_flags;
190 u32 vidcon0;
191 u32 vidcon1;
192 u32 vidout_con;
193 u32 i80ifcon;
194 bool i80_if;
195 bool suspended;
196 int pipe;
197 wait_queue_head_t wait_vsync_queue;
198 atomic_t wait_vsync_event;
199 atomic_t win_updated;
200 atomic_t triggering;
201
202 const struct fimd_driver_data *driver_data;
203 struct drm_encoder *encoder;
204 struct exynos_drm_clk dp_clk;
205 };
206
207 static const struct of_device_id fimd_driver_dt_match[] = {
208 { .compatible = "samsung,s3c6400-fimd",
209 .data = &s3c64xx_fimd_driver_data },
210 { .compatible = "samsung,exynos3250-fimd",
211 .data = &exynos3_fimd_driver_data },
212 { .compatible = "samsung,exynos4210-fimd",
213 .data = &exynos4_fimd_driver_data },
214 { .compatible = "samsung,exynos4415-fimd",
215 .data = &exynos4415_fimd_driver_data },
216 { .compatible = "samsung,exynos5250-fimd",
217 .data = &exynos5_fimd_driver_data },
218 { .compatible = "samsung,exynos5420-fimd",
219 .data = &exynos5420_fimd_driver_data },
220 {},
221 };
222 MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
223
224 static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
225 DRM_PLANE_TYPE_PRIMARY,
226 DRM_PLANE_TYPE_OVERLAY,
227 DRM_PLANE_TYPE_OVERLAY,
228 DRM_PLANE_TYPE_OVERLAY,
229 DRM_PLANE_TYPE_CURSOR,
230 };
231
232 static const uint32_t fimd_formats[] = {
233 DRM_FORMAT_C8,
234 DRM_FORMAT_XRGB1555,
235 DRM_FORMAT_RGB565,
236 DRM_FORMAT_XRGB8888,
237 DRM_FORMAT_ARGB8888,
238 };
239
240 static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
241 {
242 struct fimd_context *ctx = crtc->ctx;
243 u32 val;
244
245 if (ctx->suspended)
246 return -EPERM;
247
248 if (!test_and_set_bit(0, &ctx->irq_flags)) {
249 val = readl(ctx->regs + VIDINTCON0);
250
251 val |= VIDINTCON0_INT_ENABLE;
252
253 if (ctx->i80_if) {
254 val |= VIDINTCON0_INT_I80IFDONE;
255 val |= VIDINTCON0_INT_SYSMAINCON;
256 val &= ~VIDINTCON0_INT_SYSSUBCON;
257 } else {
258 val |= VIDINTCON0_INT_FRAME;
259
260 val &= ~VIDINTCON0_FRAMESEL0_MASK;
261 val |= VIDINTCON0_FRAMESEL0_VSYNC;
262 val &= ~VIDINTCON0_FRAMESEL1_MASK;
263 val |= VIDINTCON0_FRAMESEL1_NONE;
264 }
265
266 writel(val, ctx->regs + VIDINTCON0);
267 }
268
269 return 0;
270 }
271
272 static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
273 {
274 struct fimd_context *ctx = crtc->ctx;
275 u32 val;
276
277 if (ctx->suspended)
278 return;
279
280 if (test_and_clear_bit(0, &ctx->irq_flags)) {
281 val = readl(ctx->regs + VIDINTCON0);
282
283 val &= ~VIDINTCON0_INT_ENABLE;
284
285 if (ctx->i80_if) {
286 val &= ~VIDINTCON0_INT_I80IFDONE;
287 val &= ~VIDINTCON0_INT_SYSMAINCON;
288 val &= ~VIDINTCON0_INT_SYSSUBCON;
289 } else
290 val &= ~VIDINTCON0_INT_FRAME;
291
292 writel(val, ctx->regs + VIDINTCON0);
293 }
294 }
295
296 static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
297 {
298 struct fimd_context *ctx = crtc->ctx;
299
300 if (ctx->suspended)
301 return;
302
303 atomic_set(&ctx->wait_vsync_event, 1);
304
305 /*
306 * wait for FIMD to signal VSYNC interrupt or return after
307 * timeout which is set to 50ms (refresh rate of 20).
308 */
309 if (!wait_event_timeout(ctx->wait_vsync_queue,
310 !atomic_read(&ctx->wait_vsync_event),
311 HZ/20))
312 DRM_DEBUG_KMS("vblank wait timed out.\n");
313 }
314
315 static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
316 bool enable)
317 {
318 u32 val = readl(ctx->regs + WINCON(win));
319
320 if (enable)
321 val |= WINCONx_ENWIN;
322 else
323 val &= ~WINCONx_ENWIN;
324
325 writel(val, ctx->regs + WINCON(win));
326 }
327
328 static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
329 unsigned int win,
330 bool enable)
331 {
332 u32 val = readl(ctx->regs + SHADOWCON);
333
334 if (enable)
335 val |= SHADOWCON_CHx_ENABLE(win);
336 else
337 val &= ~SHADOWCON_CHx_ENABLE(win);
338
339 writel(val, ctx->regs + SHADOWCON);
340 }
341
342 static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
343 {
344 struct fimd_context *ctx = crtc->ctx;
345 unsigned int win, ch_enabled = 0;
346
347 DRM_DEBUG_KMS("%s\n", __FILE__);
348
349 /* Hardware is in unknown state, so ensure it gets enabled properly */
350 pm_runtime_get_sync(ctx->dev);
351
352 clk_prepare_enable(ctx->bus_clk);
353 clk_prepare_enable(ctx->lcd_clk);
354
355 /* Check if any channel is enabled. */
356 for (win = 0; win < WINDOWS_NR; win++) {
357 u32 val = readl(ctx->regs + WINCON(win));
358
359 if (val & WINCONx_ENWIN) {
360 fimd_enable_video_output(ctx, win, false);
361
362 if (ctx->driver_data->has_shadowcon)
363 fimd_enable_shadow_channel_path(ctx, win,
364 false);
365
366 ch_enabled = 1;
367 }
368 }
369
370 /* Wait for vsync, as disable channel takes effect at next vsync */
371 if (ch_enabled) {
372 int pipe = ctx->pipe;
373
374 /* ensure that vblank interrupt won't be reported to core */
375 ctx->suspended = false;
376 ctx->pipe = -1;
377
378 fimd_enable_vblank(ctx->crtc);
379 fimd_wait_for_vblank(ctx->crtc);
380 fimd_disable_vblank(ctx->crtc);
381
382 ctx->suspended = true;
383 ctx->pipe = pipe;
384 }
385
386 clk_disable_unprepare(ctx->lcd_clk);
387 clk_disable_unprepare(ctx->bus_clk);
388
389 pm_runtime_put(ctx->dev);
390 }
391
392 static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
393 const struct drm_display_mode *mode)
394 {
395 unsigned long ideal_clk;
396 u32 clkdiv;
397
398 if (mode->clock == 0) {
399 DRM_ERROR("Mode has zero clock value.\n");
400 return 0xff;
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 /* Find the clock divider value that gets us closest to ideal_clk */
414 clkdiv = DIV_ROUND_CLOSEST(clk_get_rate(ctx->lcd_clk), ideal_clk);
415
416 return (clkdiv < 0x100) ? clkdiv : 0xff;
417 }
418
419 static void fimd_setup_trigger(struct fimd_context *ctx)
420 {
421 void __iomem *timing_base = ctx->regs + ctx->driver_data->timing_base;
422 u32 trg_type = ctx->driver_data->trg_type;
423 u32 val = readl(timing_base + TRIGCON);
424
425 val &= ~(TRGMODE_ENABLE);
426
427 if (trg_type == I80_HW_TRG) {
428 if (ctx->driver_data->has_hw_trigger)
429 val |= HWTRGEN_ENABLE | HWTRGMASK_ENABLE;
430 if (ctx->driver_data->has_trigger_per_te)
431 val |= HWTRIGEN_PER_ENABLE;
432 } else {
433 val |= TRGMODE_ENABLE;
434 }
435
436 writel(val, timing_base + TRIGCON);
437 }
438
439 static void fimd_commit(struct exynos_drm_crtc *crtc)
440 {
441 struct fimd_context *ctx = crtc->ctx;
442 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
443 const struct fimd_driver_data *driver_data = ctx->driver_data;
444 void *timing_base = ctx->regs + driver_data->timing_base;
445 u32 val, clkdiv;
446
447 if (ctx->suspended)
448 return;
449
450 /* nothing to do if we haven't set the mode yet */
451 if (mode->htotal == 0 || mode->vtotal == 0)
452 return;
453
454 if (ctx->i80_if) {
455 val = ctx->i80ifcon | I80IFEN_ENABLE;
456 writel(val, timing_base + I80IFCONFAx(0));
457
458 /* disable auto frame rate */
459 writel(0, timing_base + I80IFCONFBx(0));
460
461 /* set video type selection to I80 interface */
462 if (driver_data->has_vtsel && ctx->sysreg &&
463 regmap_update_bits(ctx->sysreg,
464 driver_data->lcdblk_offset,
465 0x3 << driver_data->lcdblk_vt_shift,
466 0x1 << driver_data->lcdblk_vt_shift)) {
467 DRM_ERROR("Failed to update sysreg for I80 i/f.\n");
468 return;
469 }
470 } else {
471 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
472 u32 vidcon1;
473
474 /* setup polarity values */
475 vidcon1 = ctx->vidcon1;
476 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
477 vidcon1 |= VIDCON1_INV_VSYNC;
478 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
479 vidcon1 |= VIDCON1_INV_HSYNC;
480 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
481
482 /* setup vertical timing values. */
483 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
484 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
485 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
486
487 val = VIDTCON0_VBPD(vbpd - 1) |
488 VIDTCON0_VFPD(vfpd - 1) |
489 VIDTCON0_VSPW(vsync_len - 1);
490 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
491
492 /* setup horizontal timing values. */
493 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
494 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
495 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
496
497 val = VIDTCON1_HBPD(hbpd - 1) |
498 VIDTCON1_HFPD(hfpd - 1) |
499 VIDTCON1_HSPW(hsync_len - 1);
500 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
501 }
502
503 if (driver_data->has_vidoutcon)
504 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
505
506 /* set bypass selection */
507 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
508 driver_data->lcdblk_offset,
509 0x1 << driver_data->lcdblk_bypass_shift,
510 0x1 << driver_data->lcdblk_bypass_shift)) {
511 DRM_ERROR("Failed to update sysreg for bypass setting.\n");
512 return;
513 }
514
515 /* TODO: When MIC is enabled for display path, the lcdblk_mic_bypass
516 * bit should be cleared.
517 */
518 if (driver_data->has_mic_bypass && ctx->sysreg &&
519 regmap_update_bits(ctx->sysreg,
520 driver_data->lcdblk_offset,
521 0x1 << driver_data->lcdblk_mic_bypass_shift,
522 0x1 << driver_data->lcdblk_mic_bypass_shift)) {
523 DRM_ERROR("Failed to update sysreg for bypass mic.\n");
524 return;
525 }
526
527 /* setup horizontal and vertical display size. */
528 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
529 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
530 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
531 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
532 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
533
534 fimd_setup_trigger(ctx);
535
536 /*
537 * fields of register with prefix '_F' would be updated
538 * at vsync(same as dma start)
539 */
540 val = ctx->vidcon0;
541 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
542
543 if (ctx->driver_data->has_clksel)
544 val |= VIDCON0_CLKSEL_LCD;
545
546 clkdiv = fimd_calc_clkdiv(ctx, mode);
547 if (clkdiv > 1)
548 val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
549
550 writel(val, ctx->regs + VIDCON0);
551 }
552
553
554 static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
555 uint32_t pixel_format, int width)
556 {
557 unsigned long val;
558
559 val = WINCONx_ENWIN;
560
561 /*
562 * In case of s3c64xx, window 0 doesn't support alpha channel.
563 * So the request format is ARGB8888 then change it to XRGB8888.
564 */
565 if (ctx->driver_data->has_limited_fmt && !win) {
566 if (pixel_format == DRM_FORMAT_ARGB8888)
567 pixel_format = DRM_FORMAT_XRGB8888;
568 }
569
570 switch (pixel_format) {
571 case DRM_FORMAT_C8:
572 val |= WINCON0_BPPMODE_8BPP_PALETTE;
573 val |= WINCONx_BURSTLEN_8WORD;
574 val |= WINCONx_BYTSWP;
575 break;
576 case DRM_FORMAT_XRGB1555:
577 val |= WINCON0_BPPMODE_16BPP_1555;
578 val |= WINCONx_HAWSWP;
579 val |= WINCONx_BURSTLEN_16WORD;
580 break;
581 case DRM_FORMAT_RGB565:
582 val |= WINCON0_BPPMODE_16BPP_565;
583 val |= WINCONx_HAWSWP;
584 val |= WINCONx_BURSTLEN_16WORD;
585 break;
586 case DRM_FORMAT_XRGB8888:
587 val |= WINCON0_BPPMODE_24BPP_888;
588 val |= WINCONx_WSWP;
589 val |= WINCONx_BURSTLEN_16WORD;
590 break;
591 case DRM_FORMAT_ARGB8888:
592 val |= WINCON1_BPPMODE_25BPP_A1888
593 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
594 val |= WINCONx_WSWP;
595 val |= WINCONx_BURSTLEN_16WORD;
596 break;
597 default:
598 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
599
600 val |= WINCON0_BPPMODE_24BPP_888;
601 val |= WINCONx_WSWP;
602 val |= WINCONx_BURSTLEN_16WORD;
603 break;
604 }
605
606 /*
607 * Setting dma-burst to 16Word causes permanent tearing for very small
608 * buffers, e.g. cursor buffer. Burst Mode switching which based on
609 * plane size is not recommended as plane size varies alot towards the
610 * end of the screen and rapid movement causes unstable DMA, but it is
611 * still better to change dma-burst than displaying garbage.
612 */
613
614 if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
615 val &= ~WINCONx_BURSTLEN_MASK;
616 val |= WINCONx_BURSTLEN_4WORD;
617 }
618
619 writel(val, ctx->regs + WINCON(win));
620
621 /* hardware window 0 doesn't support alpha channel. */
622 if (win != 0) {
623 /* OSD alpha */
624 val = VIDISD14C_ALPHA0_R(0xf) |
625 VIDISD14C_ALPHA0_G(0xf) |
626 VIDISD14C_ALPHA0_B(0xf) |
627 VIDISD14C_ALPHA1_R(0xf) |
628 VIDISD14C_ALPHA1_G(0xf) |
629 VIDISD14C_ALPHA1_B(0xf);
630
631 writel(val, ctx->regs + VIDOSD_C(win));
632
633 val = VIDW_ALPHA_R(0xf) | VIDW_ALPHA_G(0xf) |
634 VIDW_ALPHA_G(0xf);
635 writel(val, ctx->regs + VIDWnALPHA0(win));
636 writel(val, ctx->regs + VIDWnALPHA1(win));
637 }
638 }
639
640 static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
641 {
642 unsigned int keycon0 = 0, keycon1 = 0;
643
644 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
645 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
646
647 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
648
649 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
650 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
651 }
652
653 /**
654 * shadow_protect_win() - disable updating values from shadow registers at vsync
655 *
656 * @win: window to protect registers for
657 * @protect: 1 to protect (disable updates)
658 */
659 static void fimd_shadow_protect_win(struct fimd_context *ctx,
660 unsigned int win, bool protect)
661 {
662 u32 reg, bits, val;
663
664 /*
665 * SHADOWCON/PRTCON register is used for enabling timing.
666 *
667 * for example, once only width value of a register is set,
668 * if the dma is started then fimd hardware could malfunction so
669 * with protect window setting, the register fields with prefix '_F'
670 * wouldn't be updated at vsync also but updated once unprotect window
671 * is set.
672 */
673
674 if (ctx->driver_data->has_shadowcon) {
675 reg = SHADOWCON;
676 bits = SHADOWCON_WINx_PROTECT(win);
677 } else {
678 reg = PRTCON;
679 bits = PRTCON_PROTECT;
680 }
681
682 val = readl(ctx->regs + reg);
683 if (protect)
684 val |= bits;
685 else
686 val &= ~bits;
687 writel(val, ctx->regs + reg);
688 }
689
690 static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
691 {
692 struct fimd_context *ctx = crtc->ctx;
693 int i;
694
695 if (ctx->suspended)
696 return;
697
698 for (i = 0; i < WINDOWS_NR; i++)
699 fimd_shadow_protect_win(ctx, i, true);
700 }
701
702 static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
703 {
704 struct fimd_context *ctx = crtc->ctx;
705 int i;
706
707 if (ctx->suspended)
708 return;
709
710 for (i = 0; i < WINDOWS_NR; i++)
711 fimd_shadow_protect_win(ctx, i, false);
712 }
713
714 static void fimd_update_plane(struct exynos_drm_crtc *crtc,
715 struct exynos_drm_plane *plane)
716 {
717 struct exynos_drm_plane_state *state =
718 to_exynos_plane_state(plane->base.state);
719 struct fimd_context *ctx = crtc->ctx;
720 struct drm_framebuffer *fb = state->base.fb;
721 dma_addr_t dma_addr;
722 unsigned long val, size, offset;
723 unsigned int last_x, last_y, buf_offsize, line_size;
724 unsigned int win = plane->index;
725 unsigned int bpp = fb->bits_per_pixel >> 3;
726 unsigned int pitch = fb->pitches[0];
727
728 if (ctx->suspended)
729 return;
730
731 offset = state->src.x * bpp;
732 offset += state->src.y * pitch;
733
734 /* buffer start address */
735 dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
736 val = (unsigned long)dma_addr;
737 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
738
739 /* buffer end address */
740 size = pitch * state->crtc.h;
741 val = (unsigned long)(dma_addr + size);
742 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
743
744 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
745 (unsigned long)dma_addr, val, size);
746 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
747 state->crtc.w, state->crtc.h);
748
749 /* buffer size */
750 buf_offsize = pitch - (state->crtc.w * bpp);
751 line_size = state->crtc.w * bpp;
752 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
753 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
754 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
755 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
756 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
757
758 /* OSD position */
759 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
760 VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
761 VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
762 VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
763 writel(val, ctx->regs + VIDOSD_A(win));
764
765 last_x = state->crtc.x + state->crtc.w;
766 if (last_x)
767 last_x--;
768 last_y = state->crtc.y + state->crtc.h;
769 if (last_y)
770 last_y--;
771
772 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
773 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
774
775 writel(val, ctx->regs + VIDOSD_B(win));
776
777 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
778 state->crtc.x, state->crtc.y, last_x, last_y);
779
780 /* OSD size */
781 if (win != 3 && win != 4) {
782 u32 offset = VIDOSD_D(win);
783 if (win == 0)
784 offset = VIDOSD_C(win);
785 val = state->crtc.w * state->crtc.h;
786 writel(val, ctx->regs + offset);
787
788 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
789 }
790
791 fimd_win_set_pixfmt(ctx, win, fb->pixel_format, state->src.w);
792
793 /* hardware window 0 doesn't support color key. */
794 if (win != 0)
795 fimd_win_set_colkey(ctx, win);
796
797 fimd_enable_video_output(ctx, win, true);
798
799 if (ctx->driver_data->has_shadowcon)
800 fimd_enable_shadow_channel_path(ctx, win, true);
801
802 if (ctx->i80_if)
803 atomic_set(&ctx->win_updated, 1);
804 }
805
806 static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
807 struct exynos_drm_plane *plane)
808 {
809 struct fimd_context *ctx = crtc->ctx;
810 unsigned int win = plane->index;
811
812 if (ctx->suspended)
813 return;
814
815 fimd_enable_video_output(ctx, win, false);
816
817 if (ctx->driver_data->has_shadowcon)
818 fimd_enable_shadow_channel_path(ctx, win, false);
819 }
820
821 static void fimd_enable(struct exynos_drm_crtc *crtc)
822 {
823 struct fimd_context *ctx = crtc->ctx;
824
825 if (!ctx->suspended)
826 return;
827
828 ctx->suspended = false;
829
830 pm_runtime_get_sync(ctx->dev);
831
832 /* if vblank was enabled status, enable it again. */
833 if (test_and_clear_bit(0, &ctx->irq_flags))
834 fimd_enable_vblank(ctx->crtc);
835
836 fimd_commit(ctx->crtc);
837 }
838
839 static void fimd_disable(struct exynos_drm_crtc *crtc)
840 {
841 struct fimd_context *ctx = crtc->ctx;
842 int i;
843
844 if (ctx->suspended)
845 return;
846
847 /*
848 * We need to make sure that all windows are disabled before we
849 * suspend that connector. Otherwise we might try to scan from
850 * a destroyed buffer later.
851 */
852 for (i = 0; i < WINDOWS_NR; i++)
853 fimd_disable_plane(crtc, &ctx->planes[i]);
854
855 fimd_enable_vblank(crtc);
856 fimd_wait_for_vblank(crtc);
857 fimd_disable_vblank(crtc);
858
859 writel(0, ctx->regs + VIDCON0);
860
861 pm_runtime_put_sync(ctx->dev);
862 ctx->suspended = true;
863 }
864
865 static void fimd_trigger(struct device *dev)
866 {
867 struct fimd_context *ctx = dev_get_drvdata(dev);
868 const struct fimd_driver_data *driver_data = ctx->driver_data;
869 void *timing_base = ctx->regs + driver_data->timing_base;
870 u32 reg;
871
872 /*
873 * Skips triggering if in triggering state, because multiple triggering
874 * requests can cause panel reset.
875 */
876 if (atomic_read(&ctx->triggering))
877 return;
878
879 /* Enters triggering mode */
880 atomic_set(&ctx->triggering, 1);
881
882 reg = readl(timing_base + TRIGCON);
883 reg |= (TRGMODE_ENABLE | SWTRGCMD_ENABLE);
884 writel(reg, timing_base + TRIGCON);
885
886 /*
887 * Exits triggering mode if vblank is not enabled yet, because when the
888 * VIDINTCON0 register is not set, it can not exit from triggering mode.
889 */
890 if (!test_bit(0, &ctx->irq_flags))
891 atomic_set(&ctx->triggering, 0);
892 }
893
894 static void fimd_te_handler(struct exynos_drm_crtc *crtc)
895 {
896 struct fimd_context *ctx = crtc->ctx;
897 u32 trg_type = ctx->driver_data->trg_type;
898
899 /* Checks the crtc is detached already from encoder */
900 if (ctx->pipe < 0 || !ctx->drm_dev)
901 return;
902
903 if (trg_type == I80_HW_TRG)
904 goto out;
905
906 /*
907 * If there is a page flip request, triggers and handles the page flip
908 * event so that current fb can be updated into panel GRAM.
909 */
910 if (atomic_add_unless(&ctx->win_updated, -1, 0))
911 fimd_trigger(ctx->dev);
912
913 out:
914 /* Wakes up vsync event queue */
915 if (atomic_read(&ctx->wait_vsync_event)) {
916 atomic_set(&ctx->wait_vsync_event, 0);
917 wake_up(&ctx->wait_vsync_queue);
918 }
919
920 if (test_bit(0, &ctx->irq_flags))
921 drm_crtc_handle_vblank(&ctx->crtc->base);
922 }
923
924 static void fimd_dp_clock_enable(struct exynos_drm_clk *clk, bool enable)
925 {
926 struct fimd_context *ctx = container_of(clk, struct fimd_context,
927 dp_clk);
928 u32 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
929 writel(val, ctx->regs + DP_MIE_CLKCON);
930 }
931
932 static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
933 .enable = fimd_enable,
934 .disable = fimd_disable,
935 .commit = fimd_commit,
936 .enable_vblank = fimd_enable_vblank,
937 .disable_vblank = fimd_disable_vblank,
938 .atomic_begin = fimd_atomic_begin,
939 .update_plane = fimd_update_plane,
940 .disable_plane = fimd_disable_plane,
941 .atomic_flush = fimd_atomic_flush,
942 .te_handler = fimd_te_handler,
943 };
944
945 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
946 {
947 struct fimd_context *ctx = (struct fimd_context *)dev_id;
948 u32 val, clear_bit, start, start_s;
949 int win;
950
951 val = readl(ctx->regs + VIDINTCON1);
952
953 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
954 if (val & clear_bit)
955 writel(clear_bit, ctx->regs + VIDINTCON1);
956
957 /* check the crtc is detached already from encoder */
958 if (ctx->pipe < 0 || !ctx->drm_dev)
959 goto out;
960
961 if (!ctx->i80_if)
962 drm_crtc_handle_vblank(&ctx->crtc->base);
963
964 for (win = 0 ; win < WINDOWS_NR ; win++) {
965 struct exynos_drm_plane *plane = &ctx->planes[win];
966
967 if (!plane->pending_fb)
968 continue;
969
970 start = readl(ctx->regs + VIDWx_BUF_START(win, 0));
971 start_s = readl(ctx->regs + VIDWx_BUF_START_S(win, 0));
972 if (start == start_s)
973 exynos_drm_crtc_finish_update(ctx->crtc, plane);
974 }
975
976 if (ctx->i80_if) {
977 /* Exits triggering mode */
978 atomic_set(&ctx->triggering, 0);
979 } else {
980 /* set wait vsync event to zero and wake up queue. */
981 if (atomic_read(&ctx->wait_vsync_event)) {
982 atomic_set(&ctx->wait_vsync_event, 0);
983 wake_up(&ctx->wait_vsync_queue);
984 }
985 }
986
987 out:
988 return IRQ_HANDLED;
989 }
990
991 static int fimd_bind(struct device *dev, struct device *master, void *data)
992 {
993 struct fimd_context *ctx = dev_get_drvdata(dev);
994 struct drm_device *drm_dev = data;
995 struct exynos_drm_private *priv = drm_dev->dev_private;
996 struct exynos_drm_plane *exynos_plane;
997 unsigned int i;
998 int ret;
999
1000 ctx->drm_dev = drm_dev;
1001 ctx->pipe = priv->pipe++;
1002
1003 for (i = 0; i < WINDOWS_NR; i++) {
1004 ctx->configs[i].pixel_formats = fimd_formats;
1005 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
1006 ctx->configs[i].zpos = i;
1007 ctx->configs[i].type = fimd_win_types[i];
1008 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
1009 1 << ctx->pipe, &ctx->configs[i]);
1010 if (ret)
1011 return ret;
1012 }
1013
1014 exynos_plane = &ctx->planes[DEFAULT_WIN];
1015 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
1016 ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
1017 &fimd_crtc_ops, ctx);
1018 if (IS_ERR(ctx->crtc))
1019 return PTR_ERR(ctx->crtc);
1020
1021 if (ctx->driver_data->has_dp_clk) {
1022 ctx->dp_clk.enable = fimd_dp_clock_enable;
1023 ctx->crtc->pipe_clk = &ctx->dp_clk;
1024 }
1025
1026 if (ctx->encoder)
1027 exynos_dpi_bind(drm_dev, ctx->encoder);
1028
1029 if (is_drm_iommu_supported(drm_dev))
1030 fimd_clear_channels(ctx->crtc);
1031
1032 ret = drm_iommu_attach_device(drm_dev, dev);
1033 if (ret)
1034 priv->pipe--;
1035
1036 return ret;
1037 }
1038
1039 static void fimd_unbind(struct device *dev, struct device *master,
1040 void *data)
1041 {
1042 struct fimd_context *ctx = dev_get_drvdata(dev);
1043
1044 fimd_disable(ctx->crtc);
1045
1046 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
1047
1048 if (ctx->encoder)
1049 exynos_dpi_remove(ctx->encoder);
1050 }
1051
1052 static const struct component_ops fimd_component_ops = {
1053 .bind = fimd_bind,
1054 .unbind = fimd_unbind,
1055 };
1056
1057 static int fimd_probe(struct platform_device *pdev)
1058 {
1059 struct device *dev = &pdev->dev;
1060 struct fimd_context *ctx;
1061 struct device_node *i80_if_timings;
1062 struct resource *res;
1063 int ret;
1064
1065 if (!dev->of_node)
1066 return -ENODEV;
1067
1068 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1069 if (!ctx)
1070 return -ENOMEM;
1071
1072 ctx->dev = dev;
1073 ctx->suspended = true;
1074 ctx->driver_data = of_device_get_match_data(dev);
1075
1076 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1077 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1078 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1079 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1080
1081 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1082 if (i80_if_timings) {
1083 u32 val;
1084
1085 ctx->i80_if = true;
1086
1087 if (ctx->driver_data->has_vidoutcon)
1088 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1089 else
1090 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1091 /*
1092 * The user manual describes that this "DSI_EN" bit is required
1093 * to enable I80 24-bit data interface.
1094 */
1095 ctx->vidcon0 |= VIDCON0_DSI_EN;
1096
1097 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1098 val = 0;
1099 ctx->i80ifcon = LCD_CS_SETUP(val);
1100 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1101 val = 0;
1102 ctx->i80ifcon |= LCD_WR_SETUP(val);
1103 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1104 val = 1;
1105 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1106 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1107 val = 0;
1108 ctx->i80ifcon |= LCD_WR_HOLD(val);
1109 }
1110 of_node_put(i80_if_timings);
1111
1112 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1113 "samsung,sysreg");
1114 if (IS_ERR(ctx->sysreg)) {
1115 dev_warn(dev, "failed to get system register.\n");
1116 ctx->sysreg = NULL;
1117 }
1118
1119 ctx->bus_clk = devm_clk_get(dev, "fimd");
1120 if (IS_ERR(ctx->bus_clk)) {
1121 dev_err(dev, "failed to get bus clock\n");
1122 return PTR_ERR(ctx->bus_clk);
1123 }
1124
1125 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1126 if (IS_ERR(ctx->lcd_clk)) {
1127 dev_err(dev, "failed to get lcd clock\n");
1128 return PTR_ERR(ctx->lcd_clk);
1129 }
1130
1131 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1132
1133 ctx->regs = devm_ioremap_resource(dev, res);
1134 if (IS_ERR(ctx->regs))
1135 return PTR_ERR(ctx->regs);
1136
1137 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1138 ctx->i80_if ? "lcd_sys" : "vsync");
1139 if (!res) {
1140 dev_err(dev, "irq request failed.\n");
1141 return -ENXIO;
1142 }
1143
1144 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1145 0, "drm_fimd", ctx);
1146 if (ret) {
1147 dev_err(dev, "irq request failed.\n");
1148 return ret;
1149 }
1150
1151 init_waitqueue_head(&ctx->wait_vsync_queue);
1152 atomic_set(&ctx->wait_vsync_event, 0);
1153
1154 platform_set_drvdata(pdev, ctx);
1155
1156 ctx->encoder = exynos_dpi_probe(dev);
1157 if (IS_ERR(ctx->encoder))
1158 return PTR_ERR(ctx->encoder);
1159
1160 pm_runtime_enable(dev);
1161
1162 ret = component_add(dev, &fimd_component_ops);
1163 if (ret)
1164 goto err_disable_pm_runtime;
1165
1166 return ret;
1167
1168 err_disable_pm_runtime:
1169 pm_runtime_disable(dev);
1170
1171 return ret;
1172 }
1173
1174 static int fimd_remove(struct platform_device *pdev)
1175 {
1176 pm_runtime_disable(&pdev->dev);
1177
1178 component_del(&pdev->dev, &fimd_component_ops);
1179
1180 return 0;
1181 }
1182
1183 #ifdef CONFIG_PM
1184 static int exynos_fimd_suspend(struct device *dev)
1185 {
1186 struct fimd_context *ctx = dev_get_drvdata(dev);
1187
1188 clk_disable_unprepare(ctx->lcd_clk);
1189 clk_disable_unprepare(ctx->bus_clk);
1190
1191 return 0;
1192 }
1193
1194 static int exynos_fimd_resume(struct device *dev)
1195 {
1196 struct fimd_context *ctx = dev_get_drvdata(dev);
1197 int ret;
1198
1199 ret = clk_prepare_enable(ctx->bus_clk);
1200 if (ret < 0) {
1201 DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
1202 return ret;
1203 }
1204
1205 ret = clk_prepare_enable(ctx->lcd_clk);
1206 if (ret < 0) {
1207 DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
1208 return ret;
1209 }
1210
1211 return 0;
1212 }
1213 #endif
1214
1215 static const struct dev_pm_ops exynos_fimd_pm_ops = {
1216 SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1217 };
1218
1219 struct platform_driver fimd_driver = {
1220 .probe = fimd_probe,
1221 .remove = fimd_remove,
1222 .driver = {
1223 .name = "exynos4-fb",
1224 .owner = THIS_MODULE,
1225 .pm = &exynos_fimd_pm_ops,
1226 .of_match_table = fimd_driver_dt_match,
1227 },
1228 };
Linux with added FPC-III support