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Linux 4.9.243
[linux/fpc-iii.git] / drivers / gpu / drm / exynos / exynos_drm_fimd.c
blobe2e405170d35762a209ae9cb13d58fde87e310e7
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 u32 clkdiv;
202
203 const struct fimd_driver_data *driver_data;
204 struct drm_encoder *encoder;
205 struct exynos_drm_clk dp_clk;
206 };
207
208 static const struct of_device_id fimd_driver_dt_match[] = {
209 { .compatible = "samsung,s3c6400-fimd",
210 .data = &s3c64xx_fimd_driver_data },
211 { .compatible = "samsung,exynos3250-fimd",
212 .data = &exynos3_fimd_driver_data },
213 { .compatible = "samsung,exynos4210-fimd",
214 .data = &exynos4_fimd_driver_data },
215 { .compatible = "samsung,exynos4415-fimd",
216 .data = &exynos4415_fimd_driver_data },
217 { .compatible = "samsung,exynos5250-fimd",
218 .data = &exynos5_fimd_driver_data },
219 { .compatible = "samsung,exynos5420-fimd",
220 .data = &exynos5420_fimd_driver_data },
221 {},
222 };
223 MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
224
225 static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
226 DRM_PLANE_TYPE_PRIMARY,
227 DRM_PLANE_TYPE_OVERLAY,
228 DRM_PLANE_TYPE_OVERLAY,
229 DRM_PLANE_TYPE_OVERLAY,
230 DRM_PLANE_TYPE_CURSOR,
231 };
232
233 static const uint32_t fimd_formats[] = {
234 DRM_FORMAT_C8,
235 DRM_FORMAT_XRGB1555,
236 DRM_FORMAT_RGB565,
237 DRM_FORMAT_XRGB8888,
238 DRM_FORMAT_ARGB8888,
239 };
240
241 static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
242 {
243 struct fimd_context *ctx = crtc->ctx;
244 u32 val;
245
246 if (ctx->suspended)
247 return -EPERM;
248
249 if (!test_and_set_bit(0, &ctx->irq_flags)) {
250 val = readl(ctx->regs + VIDINTCON0);
251
252 val |= VIDINTCON0_INT_ENABLE;
253
254 if (ctx->i80_if) {
255 val |= VIDINTCON0_INT_I80IFDONE;
256 val |= VIDINTCON0_INT_SYSMAINCON;
257 val &= ~VIDINTCON0_INT_SYSSUBCON;
258 } else {
259 val |= VIDINTCON0_INT_FRAME;
260
261 val &= ~VIDINTCON0_FRAMESEL0_MASK;
262 val |= VIDINTCON0_FRAMESEL0_VSYNC;
263 val &= ~VIDINTCON0_FRAMESEL1_MASK;
264 val |= VIDINTCON0_FRAMESEL1_NONE;
265 }
266
267 writel(val, ctx->regs + VIDINTCON0);
268 }
269
270 return 0;
271 }
272
273 static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
274 {
275 struct fimd_context *ctx = crtc->ctx;
276 u32 val;
277
278 if (ctx->suspended)
279 return;
280
281 if (test_and_clear_bit(0, &ctx->irq_flags)) {
282 val = readl(ctx->regs + VIDINTCON0);
283
284 val &= ~VIDINTCON0_INT_ENABLE;
285
286 if (ctx->i80_if) {
287 val &= ~VIDINTCON0_INT_I80IFDONE;
288 val &= ~VIDINTCON0_INT_SYSMAINCON;
289 val &= ~VIDINTCON0_INT_SYSSUBCON;
290 } else
291 val &= ~VIDINTCON0_INT_FRAME;
292
293 writel(val, ctx->regs + VIDINTCON0);
294 }
295 }
296
297 static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
298 {
299 struct fimd_context *ctx = crtc->ctx;
300
301 if (ctx->suspended)
302 return;
303
304 atomic_set(&ctx->wait_vsync_event, 1);
305
306 /*
307 * wait for FIMD to signal VSYNC interrupt or return after
308 * timeout which is set to 50ms (refresh rate of 20).
309 */
310 if (!wait_event_timeout(ctx->wait_vsync_queue,
311 !atomic_read(&ctx->wait_vsync_event),
312 HZ/20))
313 DRM_DEBUG_KMS("vblank wait timed out.\n");
314 }
315
316 static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
317 bool enable)
318 {
319 u32 val = readl(ctx->regs + WINCON(win));
320
321 if (enable)
322 val |= WINCONx_ENWIN;
323 else
324 val &= ~WINCONx_ENWIN;
325
326 writel(val, ctx->regs + WINCON(win));
327 }
328
329 static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
330 unsigned int win,
331 bool enable)
332 {
333 u32 val = readl(ctx->regs + SHADOWCON);
334
335 if (enable)
336 val |= SHADOWCON_CHx_ENABLE(win);
337 else
338 val &= ~SHADOWCON_CHx_ENABLE(win);
339
340 writel(val, ctx->regs + SHADOWCON);
341 }
342
343 static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
344 {
345 struct fimd_context *ctx = crtc->ctx;
346 unsigned int win, ch_enabled = 0;
347
348 DRM_DEBUG_KMS("%s\n", __FILE__);
349
350 /* Hardware is in unknown state, so ensure it gets enabled properly */
351 pm_runtime_get_sync(ctx->dev);
352
353 clk_prepare_enable(ctx->bus_clk);
354 clk_prepare_enable(ctx->lcd_clk);
355
356 /* Check if any channel is enabled. */
357 for (win = 0; win < WINDOWS_NR; win++) {
358 u32 val = readl(ctx->regs + WINCON(win));
359
360 if (val & WINCONx_ENWIN) {
361 fimd_enable_video_output(ctx, win, false);
362
363 if (ctx->driver_data->has_shadowcon)
364 fimd_enable_shadow_channel_path(ctx, win,
365 false);
366
367 ch_enabled = 1;
368 }
369 }
370
371 /* Wait for vsync, as disable channel takes effect at next vsync */
372 if (ch_enabled) {
373 int pipe = ctx->pipe;
374
375 /* ensure that vblank interrupt won't be reported to core */
376 ctx->suspended = false;
377 ctx->pipe = -1;
378
379 fimd_enable_vblank(ctx->crtc);
380 fimd_wait_for_vblank(ctx->crtc);
381 fimd_disable_vblank(ctx->crtc);
382
383 ctx->suspended = true;
384 ctx->pipe = pipe;
385 }
386
387 clk_disable_unprepare(ctx->lcd_clk);
388 clk_disable_unprepare(ctx->bus_clk);
389
390 pm_runtime_put(ctx->dev);
391 }
392
393
394 static int fimd_atomic_check(struct exynos_drm_crtc *crtc,
395 struct drm_crtc_state *state)
396 {
397 struct drm_display_mode *mode = &state->adjusted_mode;
398 struct fimd_context *ctx = crtc->ctx;
399 unsigned long ideal_clk, lcd_rate;
400 u32 clkdiv;
401
402 if (mode->clock == 0) {
403 DRM_INFO("Mode has zero clock value.\n");
404 return -EINVAL;
405 }
406
407 ideal_clk = mode->clock * 1000;
408
409 if (ctx->i80_if) {
410 /*
411 * The frame done interrupt should be occurred prior to the
412 * next TE signal.
413 */
414 ideal_clk *= 2;
415 }
416
417 lcd_rate = clk_get_rate(ctx->lcd_clk);
418 if (2 * lcd_rate < ideal_clk) {
419 DRM_INFO("sclk_fimd clock too low(%lu) for requested pixel clock(%lu)\n",
420 lcd_rate, ideal_clk);
421 return -EINVAL;
422 }
423
424 /* Find the clock divider value that gets us closest to ideal_clk */
425 clkdiv = DIV_ROUND_CLOSEST(lcd_rate, ideal_clk);
426 if (clkdiv >= 0x200) {
427 DRM_INFO("requested pixel clock(%lu) too low\n", ideal_clk);
428 return -EINVAL;
429 }
430
431 ctx->clkdiv = (clkdiv < 0x100) ? clkdiv : 0xff;
432
433 return 0;
434 }
435
436 static void fimd_setup_trigger(struct fimd_context *ctx)
437 {
438 void __iomem *timing_base = ctx->regs + ctx->driver_data->timing_base;
439 u32 trg_type = ctx->driver_data->trg_type;
440 u32 val = readl(timing_base + TRIGCON);
441
442 val &= ~(TRGMODE_ENABLE);
443
444 if (trg_type == I80_HW_TRG) {
445 if (ctx->driver_data->has_hw_trigger)
446 val |= HWTRGEN_ENABLE | HWTRGMASK_ENABLE;
447 if (ctx->driver_data->has_trigger_per_te)
448 val |= HWTRIGEN_PER_ENABLE;
449 } else {
450 val |= TRGMODE_ENABLE;
451 }
452
453 writel(val, timing_base + TRIGCON);
454 }
455
456 static void fimd_commit(struct exynos_drm_crtc *crtc)
457 {
458 struct fimd_context *ctx = crtc->ctx;
459 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
460 const struct fimd_driver_data *driver_data = ctx->driver_data;
461 void *timing_base = ctx->regs + driver_data->timing_base;
462 u32 val;
463
464 if (ctx->suspended)
465 return;
466
467 /* nothing to do if we haven't set the mode yet */
468 if (mode->htotal == 0 || mode->vtotal == 0)
469 return;
470
471 if (ctx->i80_if) {
472 val = ctx->i80ifcon | I80IFEN_ENABLE;
473 writel(val, timing_base + I80IFCONFAx(0));
474
475 /* disable auto frame rate */
476 writel(0, timing_base + I80IFCONFBx(0));
477
478 /* set video type selection to I80 interface */
479 if (driver_data->has_vtsel && ctx->sysreg &&
480 regmap_update_bits(ctx->sysreg,
481 driver_data->lcdblk_offset,
482 0x3 << driver_data->lcdblk_vt_shift,
483 0x1 << driver_data->lcdblk_vt_shift)) {
484 DRM_ERROR("Failed to update sysreg for I80 i/f.\n");
485 return;
486 }
487 } else {
488 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
489 u32 vidcon1;
490
491 /* setup polarity values */
492 vidcon1 = ctx->vidcon1;
493 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
494 vidcon1 |= VIDCON1_INV_VSYNC;
495 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
496 vidcon1 |= VIDCON1_INV_HSYNC;
497 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
498
499 /* setup vertical timing values. */
500 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
501 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
502 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
503
504 val = VIDTCON0_VBPD(vbpd - 1) |
505 VIDTCON0_VFPD(vfpd - 1) |
506 VIDTCON0_VSPW(vsync_len - 1);
507 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
508
509 /* setup horizontal timing values. */
510 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
511 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
512 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
513
514 val = VIDTCON1_HBPD(hbpd - 1) |
515 VIDTCON1_HFPD(hfpd - 1) |
516 VIDTCON1_HSPW(hsync_len - 1);
517 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
518 }
519
520 if (driver_data->has_vidoutcon)
521 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
522
523 /* set bypass selection */
524 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
525 driver_data->lcdblk_offset,
526 0x1 << driver_data->lcdblk_bypass_shift,
527 0x1 << driver_data->lcdblk_bypass_shift)) {
528 DRM_ERROR("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_ERROR("Failed to update sysreg for bypass mic.\n");
541 return;
542 }
543
544 /* setup horizontal and vertical display size. */
545 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
546 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
547 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
548 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
549 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
550
551 fimd_setup_trigger(ctx);
552
553 /*
554 * fields of register with prefix '_F' would be updated
555 * at vsync(same as dma start)
556 */
557 val = ctx->vidcon0;
558 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
559
560 if (ctx->driver_data->has_clksel)
561 val |= VIDCON0_CLKSEL_LCD;
562
563 if (ctx->clkdiv > 1)
564 val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR;
565
566 writel(val, ctx->regs + VIDCON0);
567 }
568
569
570 static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
571 uint32_t pixel_format, int width)
572 {
573 unsigned long val;
574
575 val = WINCONx_ENWIN;
576
577 /*
578 * In case of s3c64xx, window 0 doesn't support alpha channel.
579 * So the request format is ARGB8888 then change it to XRGB8888.
580 */
581 if (ctx->driver_data->has_limited_fmt && !win) {
582 if (pixel_format == DRM_FORMAT_ARGB8888)
583 pixel_format = DRM_FORMAT_XRGB8888;
584 }
585
586 switch (pixel_format) {
587 case DRM_FORMAT_C8:
588 val |= WINCON0_BPPMODE_8BPP_PALETTE;
589 val |= WINCONx_BURSTLEN_8WORD;
590 val |= WINCONx_BYTSWP;
591 break;
592 case DRM_FORMAT_XRGB1555:
593 val |= WINCON0_BPPMODE_16BPP_1555;
594 val |= WINCONx_HAWSWP;
595 val |= WINCONx_BURSTLEN_16WORD;
596 break;
597 case DRM_FORMAT_RGB565:
598 val |= WINCON0_BPPMODE_16BPP_565;
599 val |= WINCONx_HAWSWP;
600 val |= WINCONx_BURSTLEN_16WORD;
601 break;
602 case DRM_FORMAT_XRGB8888:
603 val |= WINCON0_BPPMODE_24BPP_888;
604 val |= WINCONx_WSWP;
605 val |= WINCONx_BURSTLEN_16WORD;
606 break;
607 case DRM_FORMAT_ARGB8888:
608 val |= WINCON1_BPPMODE_25BPP_A1888
609 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
610 val |= WINCONx_WSWP;
611 val |= WINCONx_BURSTLEN_16WORD;
612 break;
613 default:
614 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
615
616 val |= WINCON0_BPPMODE_24BPP_888;
617 val |= WINCONx_WSWP;
618 val |= WINCONx_BURSTLEN_16WORD;
619 break;
620 }
621
622 /*
623 * Setting dma-burst to 16Word causes permanent tearing for very small
624 * buffers, e.g. cursor buffer. Burst Mode switching which based on
625 * plane size is not recommended as plane size varies alot towards the
626 * end of the screen and rapid movement causes unstable DMA, but it is
627 * still better to change dma-burst than displaying garbage.
628 */
629
630 if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
631 val &= ~WINCONx_BURSTLEN_MASK;
632 val |= WINCONx_BURSTLEN_4WORD;
633 }
634
635 writel(val, ctx->regs + WINCON(win));
636
637 /* hardware window 0 doesn't support alpha channel. */
638 if (win != 0) {
639 /* OSD alpha */
640 val = VIDISD14C_ALPHA0_R(0xf) |
641 VIDISD14C_ALPHA0_G(0xf) |
642 VIDISD14C_ALPHA0_B(0xf) |
643 VIDISD14C_ALPHA1_R(0xf) |
644 VIDISD14C_ALPHA1_G(0xf) |
645 VIDISD14C_ALPHA1_B(0xf);
646
647 writel(val, ctx->regs + VIDOSD_C(win));
648
649 val = VIDW_ALPHA_R(0xf) | VIDW_ALPHA_G(0xf) |
650 VIDW_ALPHA_G(0xf);
651 writel(val, ctx->regs + VIDWnALPHA0(win));
652 writel(val, ctx->regs + VIDWnALPHA1(win));
653 }
654 }
655
656 static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
657 {
658 unsigned int keycon0 = 0, keycon1 = 0;
659
660 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
661 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
662
663 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
664
665 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
666 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
667 }
668
669 /**
670 * shadow_protect_win() - disable updating values from shadow registers at vsync
671 *
672 * @win: window to protect registers for
673 * @protect: 1 to protect (disable updates)
674 */
675 static void fimd_shadow_protect_win(struct fimd_context *ctx,
676 unsigned int win, bool protect)
677 {
678 u32 reg, bits, val;
679
680 /*
681 * SHADOWCON/PRTCON register is used for enabling timing.
682 *
683 * for example, once only width value of a register is set,
684 * if the dma is started then fimd hardware could malfunction so
685 * with protect window setting, the register fields with prefix '_F'
686 * wouldn't be updated at vsync also but updated once unprotect window
687 * is set.
688 */
689
690 if (ctx->driver_data->has_shadowcon) {
691 reg = SHADOWCON;
692 bits = SHADOWCON_WINx_PROTECT(win);
693 } else {
694 reg = PRTCON;
695 bits = PRTCON_PROTECT;
696 }
697
698 val = readl(ctx->regs + reg);
699 if (protect)
700 val |= bits;
701 else
702 val &= ~bits;
703 writel(val, ctx->regs + reg);
704 }
705
706 static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
707 {
708 struct fimd_context *ctx = crtc->ctx;
709 int i;
710
711 if (ctx->suspended)
712 return;
713
714 for (i = 0; i < WINDOWS_NR; i++)
715 fimd_shadow_protect_win(ctx, i, true);
716 }
717
718 static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
719 {
720 struct fimd_context *ctx = crtc->ctx;
721 int i;
722
723 if (ctx->suspended)
724 return;
725
726 for (i = 0; i < WINDOWS_NR; i++)
727 fimd_shadow_protect_win(ctx, i, false);
728 }
729
730 static void fimd_update_plane(struct exynos_drm_crtc *crtc,
731 struct exynos_drm_plane *plane)
732 {
733 struct exynos_drm_plane_state *state =
734 to_exynos_plane_state(plane->base.state);
735 struct fimd_context *ctx = crtc->ctx;
736 struct drm_framebuffer *fb = state->base.fb;
737 dma_addr_t dma_addr;
738 unsigned long val, size, offset;
739 unsigned int last_x, last_y, buf_offsize, line_size;
740 unsigned int win = plane->index;
741 unsigned int bpp = fb->bits_per_pixel >> 3;
742 unsigned int pitch = fb->pitches[0];
743
744 if (ctx->suspended)
745 return;
746
747 offset = state->src.x * bpp;
748 offset += state->src.y * pitch;
749
750 /* buffer start address */
751 dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
752 val = (unsigned long)dma_addr;
753 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
754
755 /* buffer end address */
756 size = pitch * state->crtc.h;
757 val = (unsigned long)(dma_addr + size);
758 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
759
760 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
761 (unsigned long)dma_addr, val, size);
762 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
763 state->crtc.w, state->crtc.h);
764
765 /* buffer size */
766 buf_offsize = pitch - (state->crtc.w * bpp);
767 line_size = state->crtc.w * bpp;
768 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
769 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
770 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
771 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
772 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
773
774 /* OSD position */
775 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
776 VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
777 VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
778 VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
779 writel(val, ctx->regs + VIDOSD_A(win));
780
781 last_x = state->crtc.x + state->crtc.w;
782 if (last_x)
783 last_x--;
784 last_y = state->crtc.y + state->crtc.h;
785 if (last_y)
786 last_y--;
787
788 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
789 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
790
791 writel(val, ctx->regs + VIDOSD_B(win));
792
793 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
794 state->crtc.x, state->crtc.y, last_x, last_y);
795
796 /* OSD size */
797 if (win != 3 && win != 4) {
798 u32 offset = VIDOSD_D(win);
799 if (win == 0)
800 offset = VIDOSD_C(win);
801 val = state->crtc.w * state->crtc.h;
802 writel(val, ctx->regs + offset);
803
804 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
805 }
806
807 fimd_win_set_pixfmt(ctx, win, fb->pixel_format, state->src.w);
808
809 /* hardware window 0 doesn't support color key. */
810 if (win != 0)
811 fimd_win_set_colkey(ctx, win);
812
813 fimd_enable_video_output(ctx, win, true);
814
815 if (ctx->driver_data->has_shadowcon)
816 fimd_enable_shadow_channel_path(ctx, win, true);
817
818 if (ctx->i80_if)
819 atomic_set(&ctx->win_updated, 1);
820 }
821
822 static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
823 struct exynos_drm_plane *plane)
824 {
825 struct fimd_context *ctx = crtc->ctx;
826 unsigned int win = plane->index;
827
828 if (ctx->suspended)
829 return;
830
831 fimd_enable_video_output(ctx, win, false);
832
833 if (ctx->driver_data->has_shadowcon)
834 fimd_enable_shadow_channel_path(ctx, win, false);
835 }
836
837 static void fimd_enable(struct exynos_drm_crtc *crtc)
838 {
839 struct fimd_context *ctx = crtc->ctx;
840
841 if (!ctx->suspended)
842 return;
843
844 ctx->suspended = false;
845
846 pm_runtime_get_sync(ctx->dev);
847
848 /* if vblank was enabled status, enable it again. */
849 if (test_and_clear_bit(0, &ctx->irq_flags))
850 fimd_enable_vblank(ctx->crtc);
851
852 fimd_commit(ctx->crtc);
853 }
854
855 static void fimd_disable(struct exynos_drm_crtc *crtc)
856 {
857 struct fimd_context *ctx = crtc->ctx;
858 int i;
859
860 if (ctx->suspended)
861 return;
862
863 /*
864 * We need to make sure that all windows are disabled before we
865 * suspend that connector. Otherwise we might try to scan from
866 * a destroyed buffer later.
867 */
868 for (i = 0; i < WINDOWS_NR; i++)
869 fimd_disable_plane(crtc, &ctx->planes[i]);
870
871 fimd_enable_vblank(crtc);
872 fimd_wait_for_vblank(crtc);
873 fimd_disable_vblank(crtc);
874
875 writel(0, ctx->regs + VIDCON0);
876
877 pm_runtime_put_sync(ctx->dev);
878 ctx->suspended = true;
879 }
880
881 static void fimd_trigger(struct device *dev)
882 {
883 struct fimd_context *ctx = dev_get_drvdata(dev);
884 const struct fimd_driver_data *driver_data = ctx->driver_data;
885 void *timing_base = ctx->regs + driver_data->timing_base;
886 u32 reg;
887
888 /*
889 * Skips triggering if in triggering state, because multiple triggering
890 * requests can cause panel reset.
891 */
892 if (atomic_read(&ctx->triggering))
893 return;
894
895 /* Enters triggering mode */
896 atomic_set(&ctx->triggering, 1);
897
898 reg = readl(timing_base + TRIGCON);
899 reg |= (TRGMODE_ENABLE | SWTRGCMD_ENABLE);
900 writel(reg, timing_base + TRIGCON);
901
902 /*
903 * Exits triggering mode if vblank is not enabled yet, because when the
904 * VIDINTCON0 register is not set, it can not exit from triggering mode.
905 */
906 if (!test_bit(0, &ctx->irq_flags))
907 atomic_set(&ctx->triggering, 0);
908 }
909
910 static void fimd_te_handler(struct exynos_drm_crtc *crtc)
911 {
912 struct fimd_context *ctx = crtc->ctx;
913 u32 trg_type = ctx->driver_data->trg_type;
914
915 /* Checks the crtc is detached already from encoder */
916 if (ctx->pipe < 0 || !ctx->drm_dev)
917 return;
918
919 if (trg_type == I80_HW_TRG)
920 goto out;
921
922 /*
923 * If there is a page flip request, triggers and handles the page flip
924 * event so that current fb can be updated into panel GRAM.
925 */
926 if (atomic_add_unless(&ctx->win_updated, -1, 0))
927 fimd_trigger(ctx->dev);
928
929 out:
930 /* Wakes up vsync event queue */
931 if (atomic_read(&ctx->wait_vsync_event)) {
932 atomic_set(&ctx->wait_vsync_event, 0);
933 wake_up(&ctx->wait_vsync_queue);
934 }
935
936 if (test_bit(0, &ctx->irq_flags))
937 drm_crtc_handle_vblank(&ctx->crtc->base);
938 }
939
940 static void fimd_dp_clock_enable(struct exynos_drm_clk *clk, bool enable)
941 {
942 struct fimd_context *ctx = container_of(clk, struct fimd_context,
943 dp_clk);
944 u32 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
945 writel(val, ctx->regs + DP_MIE_CLKCON);
946 }
947
948 static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
949 .enable = fimd_enable,
950 .disable = fimd_disable,
951 .commit = fimd_commit,
952 .enable_vblank = fimd_enable_vblank,
953 .disable_vblank = fimd_disable_vblank,
954 .atomic_begin = fimd_atomic_begin,
955 .update_plane = fimd_update_plane,
956 .disable_plane = fimd_disable_plane,
957 .atomic_flush = fimd_atomic_flush,
958 .atomic_check = fimd_atomic_check,
959 .te_handler = fimd_te_handler,
960 };
961
962 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
963 {
964 struct fimd_context *ctx = (struct fimd_context *)dev_id;
965 u32 val, clear_bit;
966
967 val = readl(ctx->regs + VIDINTCON1);
968
969 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
970 if (val & clear_bit)
971 writel(clear_bit, ctx->regs + VIDINTCON1);
972
973 /* check the crtc is detached already from encoder */
974 if (ctx->pipe < 0 || !ctx->drm_dev)
975 goto out;
976
977 if (!ctx->i80_if)
978 drm_crtc_handle_vblank(&ctx->crtc->base);
979
980 if (ctx->i80_if) {
981 /* Exits triggering mode */
982 atomic_set(&ctx->triggering, 0);
983 } else {
984 /* set wait vsync event to zero and wake up queue. */
985 if (atomic_read(&ctx->wait_vsync_event)) {
986 atomic_set(&ctx->wait_vsync_event, 0);
987 wake_up(&ctx->wait_vsync_queue);
988 }
989 }
990
991 out:
992 return IRQ_HANDLED;
993 }
994
995 static int fimd_bind(struct device *dev, struct device *master, void *data)
996 {
997 struct fimd_context *ctx = dev_get_drvdata(dev);
998 struct drm_device *drm_dev = data;
999 struct exynos_drm_private *priv = drm_dev->dev_private;
1000 struct exynos_drm_plane *exynos_plane;
1001 unsigned int i;
1002 int ret;
1003
1004 ctx->drm_dev = drm_dev;
1005 ctx->pipe = priv->pipe++;
1006
1007 for (i = 0; i < WINDOWS_NR; i++) {
1008 ctx->configs[i].pixel_formats = fimd_formats;
1009 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
1010 ctx->configs[i].zpos = i;
1011 ctx->configs[i].type = fimd_win_types[i];
1012 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
1013 1 << ctx->pipe, &ctx->configs[i]);
1014 if (ret)
1015 return ret;
1016 }
1017
1018 exynos_plane = &ctx->planes[DEFAULT_WIN];
1019 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
1020 ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
1021 &fimd_crtc_ops, ctx);
1022 if (IS_ERR(ctx->crtc))
1023 return PTR_ERR(ctx->crtc);
1024
1025 if (ctx->driver_data->has_dp_clk) {
1026 ctx->dp_clk.enable = fimd_dp_clock_enable;
1027 ctx->crtc->pipe_clk = &ctx->dp_clk;
1028 }
1029
1030 if (ctx->encoder)
1031 exynos_dpi_bind(drm_dev, ctx->encoder);
1032
1033 if (is_drm_iommu_supported(drm_dev))
1034 fimd_clear_channels(ctx->crtc);
1035
1036 ret = drm_iommu_attach_device(drm_dev, dev);
1037 if (ret)
1038 priv->pipe--;
1039
1040 return ret;
1041 }
1042
1043 static void fimd_unbind(struct device *dev, struct device *master,
1044 void *data)
1045 {
1046 struct fimd_context *ctx = dev_get_drvdata(dev);
1047
1048 fimd_disable(ctx->crtc);
1049
1050 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
1051
1052 if (ctx->encoder)
1053 exynos_dpi_remove(ctx->encoder);
1054 }
1055
1056 static const struct component_ops fimd_component_ops = {
1057 .bind = fimd_bind,
1058 .unbind = fimd_unbind,
1059 };
1060
1061 static int fimd_probe(struct platform_device *pdev)
1062 {
1063 struct device *dev = &pdev->dev;
1064 struct fimd_context *ctx;
1065 struct device_node *i80_if_timings;
1066 struct resource *res;
1067 int ret;
1068
1069 if (!dev->of_node)
1070 return -ENODEV;
1071
1072 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1073 if (!ctx)
1074 return -ENOMEM;
1075
1076 ctx->dev = dev;
1077 ctx->suspended = true;
1078 ctx->driver_data = of_device_get_match_data(dev);
1079
1080 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1081 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1082 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1083 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1084
1085 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1086 if (i80_if_timings) {
1087 u32 val;
1088
1089 ctx->i80_if = true;
1090
1091 if (ctx->driver_data->has_vidoutcon)
1092 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1093 else
1094 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1095 /*
1096 * The user manual describes that this "DSI_EN" bit is required
1097 * to enable I80 24-bit data interface.
1098 */
1099 ctx->vidcon0 |= VIDCON0_DSI_EN;
1100
1101 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1102 val = 0;
1103 ctx->i80ifcon = LCD_CS_SETUP(val);
1104 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1105 val = 0;
1106 ctx->i80ifcon |= LCD_WR_SETUP(val);
1107 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1108 val = 1;
1109 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1110 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1111 val = 0;
1112 ctx->i80ifcon |= LCD_WR_HOLD(val);
1113 }
1114 of_node_put(i80_if_timings);
1115
1116 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1117 "samsung,sysreg");
1118 if (IS_ERR(ctx->sysreg)) {
1119 dev_warn(dev, "failed to get system register.\n");
1120 ctx->sysreg = NULL;
1121 }
1122
1123 ctx->bus_clk = devm_clk_get(dev, "fimd");
1124 if (IS_ERR(ctx->bus_clk)) {
1125 dev_err(dev, "failed to get bus clock\n");
1126 return PTR_ERR(ctx->bus_clk);
1127 }
1128
1129 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1130 if (IS_ERR(ctx->lcd_clk)) {
1131 dev_err(dev, "failed to get lcd clock\n");
1132 return PTR_ERR(ctx->lcd_clk);
1133 }
1134
1135 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1136
1137 ctx->regs = devm_ioremap_resource(dev, res);
1138 if (IS_ERR(ctx->regs))
1139 return PTR_ERR(ctx->regs);
1140
1141 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1142 ctx->i80_if ? "lcd_sys" : "vsync");
1143 if (!res) {
1144 dev_err(dev, "irq request failed.\n");
1145 return -ENXIO;
1146 }
1147
1148 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1149 0, "drm_fimd", ctx);
1150 if (ret) {
1151 dev_err(dev, "irq request failed.\n");
1152 return ret;
1153 }
1154
1155 init_waitqueue_head(&ctx->wait_vsync_queue);
1156 atomic_set(&ctx->wait_vsync_event, 0);
1157
1158 platform_set_drvdata(pdev, ctx);
1159
1160 ctx->encoder = exynos_dpi_probe(dev);
1161 if (IS_ERR(ctx->encoder))
1162 return PTR_ERR(ctx->encoder);
1163
1164 pm_runtime_enable(dev);
1165
1166 ret = component_add(dev, &fimd_component_ops);
1167 if (ret)
1168 goto err_disable_pm_runtime;
1169
1170 return ret;
1171
1172 err_disable_pm_runtime:
1173 pm_runtime_disable(dev);
1174
1175 return ret;
1176 }
1177
1178 static int fimd_remove(struct platform_device *pdev)
1179 {
1180 pm_runtime_disable(&pdev->dev);
1181
1182 component_del(&pdev->dev, &fimd_component_ops);
1183
1184 return 0;
1185 }
1186
1187 #ifdef CONFIG_PM
1188 static int exynos_fimd_suspend(struct device *dev)
1189 {
1190 struct fimd_context *ctx = dev_get_drvdata(dev);
1191
1192 clk_disable_unprepare(ctx->lcd_clk);
1193 clk_disable_unprepare(ctx->bus_clk);
1194
1195 return 0;
1196 }
1197
1198 static int exynos_fimd_resume(struct device *dev)
1199 {
1200 struct fimd_context *ctx = dev_get_drvdata(dev);
1201 int ret;
1202
1203 ret = clk_prepare_enable(ctx->bus_clk);
1204 if (ret < 0) {
1205 DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
1206 return ret;
1207 }
1208
1209 ret = clk_prepare_enable(ctx->lcd_clk);
1210 if (ret < 0) {
1211 DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
1212 return ret;
1213 }
1214
1215 return 0;
1216 }
1217 #endif
1218
1219 static const struct dev_pm_ops exynos_fimd_pm_ops = {
1220 SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1221 };
1222
1223 struct platform_driver fimd_driver = {
1224 .probe = fimd_probe,
1225 .remove = fimd_remove,
1226 .driver = {
1227 .name = "exynos4-fb",
1228 .owner = THIS_MODULE,
1229 .pm = &exynos_fimd_pm_ops,
1230 .of_match_table = fimd_driver_dt_match,
1231 },
1232 };
Linux with added FPC-III support