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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_fbdev.h"
34#include "exynos_drm_crtc.h"
35#include "exynos_drm_plane.h"
36#include "exynos_drm_iommu.h"
37
38/*
39 * FIMD stands for Fully Interactive Mobile Display and
40 * as a display controller, it transfers contents drawn on memory
41 * to a LCD Panel through Display Interfaces such as RGB or
42 * CPU Interface.
43 */
44
45#define MIN_FB_WIDTH_FOR_16WORD_BURST 128
46
47/* position control register for hardware window 0, 2 ~ 4.*/
48#define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16)
49#define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16)
50/*
51 * size control register for hardware windows 0 and alpha control register
52 * for hardware windows 1 ~ 4
53 */
54#define VIDOSD_C(win) (VIDOSD_BASE + 0x08 + (win) * 16)
55/* size control register for hardware windows 1 ~ 2. */
56#define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16)
57
58#define VIDWnALPHA0(win) (VIDW_ALPHA + 0x00 + (win) * 8)
59#define VIDWnALPHA1(win) (VIDW_ALPHA + 0x04 + (win) * 8)
60
61#define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8)
62#define VIDWx_BUF_START_S(win, buf) (VIDW_BUF_START_S(buf) + (win) * 8)
63#define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8)
64#define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4)
65
66/* color key control register for hardware window 1 ~ 4. */
67#define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + ((x - 1) * 8))
68/* color key value register for hardware window 1 ~ 4. */
69#define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + ((x - 1) * 8))
70
71/* I80 / RGB trigger control register */
72#define TRIGCON 0x1A4
73#define TRGMODE_I80_RGB_ENABLE_I80 (1 << 0)
74#define SWTRGCMD_I80_RGB_ENABLE (1 << 1)
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
92struct fimd_driver_data {
93 unsigned int timing_base;
94 unsigned int lcdblk_offset;
95 unsigned int lcdblk_vt_shift;
96 unsigned int lcdblk_bypass_shift;
97 unsigned int lcdblk_mic_bypass_shift;
98
99 unsigned int has_shadowcon:1;
100 unsigned int has_clksel:1;
101 unsigned int has_limited_fmt:1;
102 unsigned int has_vidoutcon:1;
103 unsigned int has_vtsel:1;
104 unsigned int has_mic_bypass:1;
105};
106
107static struct fimd_driver_data s3c64xx_fimd_driver_data = {
108 .timing_base = 0x0,
109 .has_clksel = 1,
110 .has_limited_fmt = 1,
111};
112
113static struct fimd_driver_data exynos3_fimd_driver_data = {
114 .timing_base = 0x20000,
115 .lcdblk_offset = 0x210,
116 .lcdblk_bypass_shift = 1,
117 .has_shadowcon = 1,
118 .has_vidoutcon = 1,
119};
120
121static struct fimd_driver_data exynos4_fimd_driver_data = {
122 .timing_base = 0x0,
123 .lcdblk_offset = 0x210,
124 .lcdblk_vt_shift = 10,
125 .lcdblk_bypass_shift = 1,
126 .has_shadowcon = 1,
127 .has_vtsel = 1,
128};
129
130static struct fimd_driver_data exynos4415_fimd_driver_data = {
131 .timing_base = 0x20000,
132 .lcdblk_offset = 0x210,
133 .lcdblk_vt_shift = 10,
134 .lcdblk_bypass_shift = 1,
135 .has_shadowcon = 1,
136 .has_vidoutcon = 1,
137 .has_vtsel = 1,
138};
139
140static struct fimd_driver_data exynos5_fimd_driver_data = {
141 .timing_base = 0x20000,
142 .lcdblk_offset = 0x214,
143 .lcdblk_vt_shift = 24,
144 .lcdblk_bypass_shift = 15,
145 .has_shadowcon = 1,
146 .has_vidoutcon = 1,
147 .has_vtsel = 1,
148};
149
150static struct fimd_driver_data exynos5420_fimd_driver_data = {
151 .timing_base = 0x20000,
152 .lcdblk_offset = 0x214,
153 .lcdblk_vt_shift = 24,
154 .lcdblk_bypass_shift = 15,
155 .lcdblk_mic_bypass_shift = 11,
156 .has_shadowcon = 1,
157 .has_vidoutcon = 1,
158 .has_vtsel = 1,
159 .has_mic_bypass = 1,
160};
161
162struct fimd_context {
163 struct device *dev;
164 struct drm_device *drm_dev;
165 struct exynos_drm_crtc *crtc;
166 struct exynos_drm_plane planes[WINDOWS_NR];
167 struct exynos_drm_plane_config configs[WINDOWS_NR];
168 struct clk *bus_clk;
169 struct clk *lcd_clk;
170 void __iomem *regs;
171 struct regmap *sysreg;
172 unsigned long irq_flags;
173 u32 vidcon0;
174 u32 vidcon1;
175 u32 vidout_con;
176 u32 i80ifcon;
177 bool i80_if;
178 bool suspended;
179 int pipe;
180 wait_queue_head_t wait_vsync_queue;
181 atomic_t wait_vsync_event;
182 atomic_t win_updated;
183 atomic_t triggering;
184
185 struct fimd_driver_data *driver_data;
186 struct drm_encoder *encoder;
187};
188
189static const struct of_device_id fimd_driver_dt_match[] = {
190 { .compatible = "samsung,s3c6400-fimd",
191 .data = &s3c64xx_fimd_driver_data },
192 { .compatible = "samsung,exynos3250-fimd",
193 .data = &exynos3_fimd_driver_data },
194 { .compatible = "samsung,exynos4210-fimd",
195 .data = &exynos4_fimd_driver_data },
196 { .compatible = "samsung,exynos4415-fimd",
197 .data = &exynos4415_fimd_driver_data },
198 { .compatible = "samsung,exynos5250-fimd",
199 .data = &exynos5_fimd_driver_data },
200 { .compatible = "samsung,exynos5420-fimd",
201 .data = &exynos5420_fimd_driver_data },
202 {},
203};
204MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
205
206static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
207 DRM_PLANE_TYPE_PRIMARY,
208 DRM_PLANE_TYPE_OVERLAY,
209 DRM_PLANE_TYPE_OVERLAY,
210 DRM_PLANE_TYPE_OVERLAY,
211 DRM_PLANE_TYPE_CURSOR,
212};
213
214static const uint32_t fimd_formats[] = {
215 DRM_FORMAT_C8,
216 DRM_FORMAT_XRGB1555,
217 DRM_FORMAT_RGB565,
218 DRM_FORMAT_XRGB8888,
219 DRM_FORMAT_ARGB8888,
220};
221
222static inline struct fimd_driver_data *drm_fimd_get_driver_data(
223 struct platform_device *pdev)
224{
225 const struct of_device_id *of_id =
226 of_match_device(fimd_driver_dt_match, &pdev->dev);
227
228 return (struct fimd_driver_data *)of_id->data;
229}
230
231static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
232{
233 struct fimd_context *ctx = crtc->ctx;
234 u32 val;
235
236 if (ctx->suspended)
237 return -EPERM;
238
239 if (!test_and_set_bit(0, &ctx->irq_flags)) {
240 val = readl(ctx->regs + VIDINTCON0);
241
242 val |= VIDINTCON0_INT_ENABLE;
243
244 if (ctx->i80_if) {
245 val |= VIDINTCON0_INT_I80IFDONE;
246 val |= VIDINTCON0_INT_SYSMAINCON;
247 val &= ~VIDINTCON0_INT_SYSSUBCON;
248 } else {
249 val |= VIDINTCON0_INT_FRAME;
250
251 val &= ~VIDINTCON0_FRAMESEL0_MASK;
252 val |= VIDINTCON0_FRAMESEL0_VSYNC;
253 val &= ~VIDINTCON0_FRAMESEL1_MASK;
254 val |= VIDINTCON0_FRAMESEL1_NONE;
255 }
256
257 writel(val, ctx->regs + VIDINTCON0);
258 }
259
260 return 0;
261}
262
263static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
264{
265 struct fimd_context *ctx = crtc->ctx;
266 u32 val;
267
268 if (ctx->suspended)
269 return;
270
271 if (test_and_clear_bit(0, &ctx->irq_flags)) {
272 val = readl(ctx->regs + VIDINTCON0);
273
274 val &= ~VIDINTCON0_INT_ENABLE;
275
276 if (ctx->i80_if) {
277 val &= ~VIDINTCON0_INT_I80IFDONE;
278 val &= ~VIDINTCON0_INT_SYSMAINCON;
279 val &= ~VIDINTCON0_INT_SYSSUBCON;
280 } else
281 val &= ~VIDINTCON0_INT_FRAME;
282
283 writel(val, ctx->regs + VIDINTCON0);
284 }
285}
286
287static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
288{
289 struct fimd_context *ctx = crtc->ctx;
290
291 if (ctx->suspended)
292 return;
293
294 atomic_set(&ctx->wait_vsync_event, 1);
295
296 /*
297 * wait for FIMD to signal VSYNC interrupt or return after
298 * timeout which is set to 50ms (refresh rate of 20).
299 */
300 if (!wait_event_timeout(ctx->wait_vsync_queue,
301 !atomic_read(&ctx->wait_vsync_event),
302 HZ/20))
303 DRM_DEBUG_KMS("vblank wait timed out.\n");
304}
305
306static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
307 bool enable)
308{
309 u32 val = readl(ctx->regs + WINCON(win));
310
311 if (enable)
312 val |= WINCONx_ENWIN;
313 else
314 val &= ~WINCONx_ENWIN;
315
316 writel(val, ctx->regs + WINCON(win));
317}
318
319static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
320 unsigned int win,
321 bool enable)
322{
323 u32 val = readl(ctx->regs + SHADOWCON);
324
325 if (enable)
326 val |= SHADOWCON_CHx_ENABLE(win);
327 else
328 val &= ~SHADOWCON_CHx_ENABLE(win);
329
330 writel(val, ctx->regs + SHADOWCON);
331}
332
333static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
334{
335 struct fimd_context *ctx = crtc->ctx;
336 unsigned int win, ch_enabled = 0;
337
338 DRM_DEBUG_KMS("%s\n", __FILE__);
339
340 /* Hardware is in unknown state, so ensure it gets enabled properly */
341 pm_runtime_get_sync(ctx->dev);
342
343 clk_prepare_enable(ctx->bus_clk);
344 clk_prepare_enable(ctx->lcd_clk);
345
346 /* Check if any channel is enabled. */
347 for (win = 0; win < WINDOWS_NR; win++) {
348 u32 val = readl(ctx->regs + WINCON(win));
349
350 if (val & WINCONx_ENWIN) {
351 fimd_enable_video_output(ctx, win, false);
352
353 if (ctx->driver_data->has_shadowcon)
354 fimd_enable_shadow_channel_path(ctx, win,
355 false);
356
357 ch_enabled = 1;
358 }
359 }
360
361 /* Wait for vsync, as disable channel takes effect at next vsync */
362 if (ch_enabled) {
363 int pipe = ctx->pipe;
364
365 /* ensure that vblank interrupt won't be reported to core */
366 ctx->suspended = false;
367 ctx->pipe = -1;
368
369 fimd_enable_vblank(ctx->crtc);
370 fimd_wait_for_vblank(ctx->crtc);
371 fimd_disable_vblank(ctx->crtc);
372
373 ctx->suspended = true;
374 ctx->pipe = pipe;
375 }
376
377 clk_disable_unprepare(ctx->lcd_clk);
378 clk_disable_unprepare(ctx->bus_clk);
379
380 pm_runtime_put(ctx->dev);
381}
382
383static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
384 const struct drm_display_mode *mode)
385{
386 unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
387 u32 clkdiv;
388
389 if (ctx->i80_if) {
390 /*
391 * The frame done interrupt should be occurred prior to the
392 * next TE signal.
393 */
394 ideal_clk *= 2;
395 }
396
397 /* Find the clock divider value that gets us closest to ideal_clk */
398 clkdiv = DIV_ROUND_CLOSEST(clk_get_rate(ctx->lcd_clk), ideal_clk);
399
400 return (clkdiv < 0x100) ? clkdiv : 0xff;
401}
402
403static void fimd_commit(struct exynos_drm_crtc *crtc)
404{
405 struct fimd_context *ctx = crtc->ctx;
406 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
407 struct fimd_driver_data *driver_data = ctx->driver_data;
408 void *timing_base = ctx->regs + driver_data->timing_base;
409 u32 val, clkdiv;
410
411 if (ctx->suspended)
412 return;
413
414 /* nothing to do if we haven't set the mode yet */
415 if (mode->htotal == 0 || mode->vtotal == 0)
416 return;
417
418 if (ctx->i80_if) {
419 val = ctx->i80ifcon | I80IFEN_ENABLE;
420 writel(val, timing_base + I80IFCONFAx(0));
421
422 /* disable auto frame rate */
423 writel(0, timing_base + I80IFCONFBx(0));
424
425 /* set video type selection to I80 interface */
426 if (driver_data->has_vtsel && ctx->sysreg &&
427 regmap_update_bits(ctx->sysreg,
428 driver_data->lcdblk_offset,
429 0x3 << driver_data->lcdblk_vt_shift,
430 0x1 << driver_data->lcdblk_vt_shift)) {
431 DRM_ERROR("Failed to update sysreg for I80 i/f.\n");
432 return;
433 }
434 } else {
435 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
436 u32 vidcon1;
437
438 /* setup polarity values */
439 vidcon1 = ctx->vidcon1;
440 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
441 vidcon1 |= VIDCON1_INV_VSYNC;
442 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
443 vidcon1 |= VIDCON1_INV_HSYNC;
444 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
445
446 /* setup vertical timing values. */
447 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
448 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
449 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
450
451 val = VIDTCON0_VBPD(vbpd - 1) |
452 VIDTCON0_VFPD(vfpd - 1) |
453 VIDTCON0_VSPW(vsync_len - 1);
454 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
455
456 /* setup horizontal timing values. */
457 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
458 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
459 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
460
461 val = VIDTCON1_HBPD(hbpd - 1) |
462 VIDTCON1_HFPD(hfpd - 1) |
463 VIDTCON1_HSPW(hsync_len - 1);
464 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
465 }
466
467 if (driver_data->has_vidoutcon)
468 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
469
470 /* set bypass selection */
471 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
472 driver_data->lcdblk_offset,
473 0x1 << driver_data->lcdblk_bypass_shift,
474 0x1 << driver_data->lcdblk_bypass_shift)) {
475 DRM_ERROR("Failed to update sysreg for bypass setting.\n");
476 return;
477 }
478
479 /* TODO: When MIC is enabled for display path, the lcdblk_mic_bypass
480 * bit should be cleared.
481 */
482 if (driver_data->has_mic_bypass && ctx->sysreg &&
483 regmap_update_bits(ctx->sysreg,
484 driver_data->lcdblk_offset,
485 0x1 << driver_data->lcdblk_mic_bypass_shift,
486 0x1 << driver_data->lcdblk_mic_bypass_shift)) {
487 DRM_ERROR("Failed to update sysreg for bypass mic.\n");
488 return;
489 }
490
491 /* setup horizontal and vertical display size. */
492 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
493 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
494 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
495 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
496 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
497
498 /*
499 * fields of register with prefix '_F' would be updated
500 * at vsync(same as dma start)
501 */
502 val = ctx->vidcon0;
503 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
504
505 if (ctx->driver_data->has_clksel)
506 val |= VIDCON0_CLKSEL_LCD;
507
508 clkdiv = fimd_calc_clkdiv(ctx, mode);
509 if (clkdiv > 1)
510 val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
511
512 writel(val, ctx->regs + VIDCON0);
513}
514
515
516static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
517 uint32_t pixel_format, int width)
518{
519 unsigned long val;
520
521 val = WINCONx_ENWIN;
522
523 /*
524 * In case of s3c64xx, window 0 doesn't support alpha channel.
525 * So the request format is ARGB8888 then change it to XRGB8888.
526 */
527 if (ctx->driver_data->has_limited_fmt && !win) {
528 if (pixel_format == DRM_FORMAT_ARGB8888)
529 pixel_format = DRM_FORMAT_XRGB8888;
530 }
531
532 switch (pixel_format) {
533 case DRM_FORMAT_C8:
534 val |= WINCON0_BPPMODE_8BPP_PALETTE;
535 val |= WINCONx_BURSTLEN_8WORD;
536 val |= WINCONx_BYTSWP;
537 break;
538 case DRM_FORMAT_XRGB1555:
539 val |= WINCON0_BPPMODE_16BPP_1555;
540 val |= WINCONx_HAWSWP;
541 val |= WINCONx_BURSTLEN_16WORD;
542 break;
543 case DRM_FORMAT_RGB565:
544 val |= WINCON0_BPPMODE_16BPP_565;
545 val |= WINCONx_HAWSWP;
546 val |= WINCONx_BURSTLEN_16WORD;
547 break;
548 case DRM_FORMAT_XRGB8888:
549 val |= WINCON0_BPPMODE_24BPP_888;
550 val |= WINCONx_WSWP;
551 val |= WINCONx_BURSTLEN_16WORD;
552 break;
553 case DRM_FORMAT_ARGB8888:
554 val |= WINCON1_BPPMODE_25BPP_A1888
555 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
556 val |= WINCONx_WSWP;
557 val |= WINCONx_BURSTLEN_16WORD;
558 break;
559 default:
560 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
561
562 val |= WINCON0_BPPMODE_24BPP_888;
563 val |= WINCONx_WSWP;
564 val |= WINCONx_BURSTLEN_16WORD;
565 break;
566 }
567
568 /*
569 * Setting dma-burst to 16Word causes permanent tearing for very small
570 * buffers, e.g. cursor buffer. Burst Mode switching which based on
571 * plane size is not recommended as plane size varies alot towards the
572 * end of the screen and rapid movement causes unstable DMA, but it is
573 * still better to change dma-burst than displaying garbage.
574 */
575
576 if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
577 val &= ~WINCONx_BURSTLEN_MASK;
578 val |= WINCONx_BURSTLEN_4WORD;
579 }
580
581 writel(val, ctx->regs + WINCON(win));
582
583 /* hardware window 0 doesn't support alpha channel. */
584 if (win != 0) {
585 /* OSD alpha */
586 val = VIDISD14C_ALPHA0_R(0xf) |
587 VIDISD14C_ALPHA0_G(0xf) |
588 VIDISD14C_ALPHA0_B(0xf) |
589 VIDISD14C_ALPHA1_R(0xf) |
590 VIDISD14C_ALPHA1_G(0xf) |
591 VIDISD14C_ALPHA1_B(0xf);
592
593 writel(val, ctx->regs + VIDOSD_C(win));
594
595 val = VIDW_ALPHA_R(0xf) | VIDW_ALPHA_G(0xf) |
596 VIDW_ALPHA_G(0xf);
597 writel(val, ctx->regs + VIDWnALPHA0(win));
598 writel(val, ctx->regs + VIDWnALPHA1(win));
599 }
600}
601
602static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
603{
604 unsigned int keycon0 = 0, keycon1 = 0;
605
606 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
607 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
608
609 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
610
611 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
612 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
613}
614
615/**
616 * shadow_protect_win() - disable updating values from shadow registers at vsync
617 *
618 * @win: window to protect registers for
619 * @protect: 1 to protect (disable updates)
620 */
621static void fimd_shadow_protect_win(struct fimd_context *ctx,
622 unsigned int win, bool protect)
623{
624 u32 reg, bits, val;
625
626 /*
627 * SHADOWCON/PRTCON register is used for enabling timing.
628 *
629 * for example, once only width value of a register is set,
630 * if the dma is started then fimd hardware could malfunction so
631 * with protect window setting, the register fields with prefix '_F'
632 * wouldn't be updated at vsync also but updated once unprotect window
633 * is set.
634 */
635
636 if (ctx->driver_data->has_shadowcon) {
637 reg = SHADOWCON;
638 bits = SHADOWCON_WINx_PROTECT(win);
639 } else {
640 reg = PRTCON;
641 bits = PRTCON_PROTECT;
642 }
643
644 val = readl(ctx->regs + reg);
645 if (protect)
646 val |= bits;
647 else
648 val &= ~bits;
649 writel(val, ctx->regs + reg);
650}
651
652static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
653{
654 struct fimd_context *ctx = crtc->ctx;
655 int i;
656
657 if (ctx->suspended)
658 return;
659
660 for (i = 0; i < WINDOWS_NR; i++)
661 fimd_shadow_protect_win(ctx, i, true);
662}
663
664static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
665{
666 struct fimd_context *ctx = crtc->ctx;
667 int i;
668
669 if (ctx->suspended)
670 return;
671
672 for (i = 0; i < WINDOWS_NR; i++)
673 fimd_shadow_protect_win(ctx, i, false);
674}
675
676static void fimd_update_plane(struct exynos_drm_crtc *crtc,
677 struct exynos_drm_plane *plane)
678{
679 struct exynos_drm_plane_state *state =
680 to_exynos_plane_state(plane->base.state);
681 struct fimd_context *ctx = crtc->ctx;
682 struct drm_framebuffer *fb = state->base.fb;
683 dma_addr_t dma_addr;
684 unsigned long val, size, offset;
685 unsigned int last_x, last_y, buf_offsize, line_size;
686 unsigned int win = plane->index;
687 unsigned int bpp = fb->bits_per_pixel >> 3;
688 unsigned int pitch = fb->pitches[0];
689
690 if (ctx->suspended)
691 return;
692
693 offset = state->src.x * bpp;
694 offset += state->src.y * pitch;
695
696 /* buffer start address */
697 dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
698 val = (unsigned long)dma_addr;
699 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
700
701 /* buffer end address */
702 size = pitch * state->crtc.h;
703 val = (unsigned long)(dma_addr + size);
704 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
705
706 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
707 (unsigned long)dma_addr, val, size);
708 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
709 state->crtc.w, state->crtc.h);
710
711 /* buffer size */
712 buf_offsize = pitch - (state->crtc.w * bpp);
713 line_size = state->crtc.w * bpp;
714 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
715 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
716 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
717 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
718 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
719
720 /* OSD position */
721 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
722 VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
723 VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
724 VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
725 writel(val, ctx->regs + VIDOSD_A(win));
726
727 last_x = state->crtc.x + state->crtc.w;
728 if (last_x)
729 last_x--;
730 last_y = state->crtc.y + state->crtc.h;
731 if (last_y)
732 last_y--;
733
734 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
735 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
736
737 writel(val, ctx->regs + VIDOSD_B(win));
738
739 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
740 state->crtc.x, state->crtc.y, last_x, last_y);
741
742 /* OSD size */
743 if (win != 3 && win != 4) {
744 u32 offset = VIDOSD_D(win);
745 if (win == 0)
746 offset = VIDOSD_C(win);
747 val = state->crtc.w * state->crtc.h;
748 writel(val, ctx->regs + offset);
749
750 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
751 }
752
753 fimd_win_set_pixfmt(ctx, win, fb->pixel_format, state->src.w);
754
755 /* hardware window 0 doesn't support color key. */
756 if (win != 0)
757 fimd_win_set_colkey(ctx, win);
758
759 fimd_enable_video_output(ctx, win, true);
760
761 if (ctx->driver_data->has_shadowcon)
762 fimd_enable_shadow_channel_path(ctx, win, true);
763
764 if (ctx->i80_if)
765 atomic_set(&ctx->win_updated, 1);
766}
767
768static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
769 struct exynos_drm_plane *plane)
770{
771 struct fimd_context *ctx = crtc->ctx;
772 unsigned int win = plane->index;
773
774 if (ctx->suspended)
775 return;
776
777 fimd_enable_video_output(ctx, win, false);
778
779 if (ctx->driver_data->has_shadowcon)
780 fimd_enable_shadow_channel_path(ctx, win, false);
781}
782
783static void fimd_enable(struct exynos_drm_crtc *crtc)
784{
785 struct fimd_context *ctx = crtc->ctx;
786
787 if (!ctx->suspended)
788 return;
789
790 ctx->suspended = false;
791
792 pm_runtime_get_sync(ctx->dev);
793
794 /* if vblank was enabled status, enable it again. */
795 if (test_and_clear_bit(0, &ctx->irq_flags))
796 fimd_enable_vblank(ctx->crtc);
797
798 fimd_commit(ctx->crtc);
799}
800
801static void fimd_disable(struct exynos_drm_crtc *crtc)
802{
803 struct fimd_context *ctx = crtc->ctx;
804 int i;
805
806 if (ctx->suspended)
807 return;
808
809 /*
810 * We need to make sure that all windows are disabled before we
811 * suspend that connector. Otherwise we might try to scan from
812 * a destroyed buffer later.
813 */
814 for (i = 0; i < WINDOWS_NR; i++)
815 fimd_disable_plane(crtc, &ctx->planes[i]);
816
817 fimd_enable_vblank(crtc);
818 fimd_wait_for_vblank(crtc);
819 fimd_disable_vblank(crtc);
820
821 writel(0, ctx->regs + VIDCON0);
822
823 pm_runtime_put_sync(ctx->dev);
824 ctx->suspended = true;
825}
826
827static void fimd_trigger(struct device *dev)
828{
829 struct fimd_context *ctx = dev_get_drvdata(dev);
830 struct fimd_driver_data *driver_data = ctx->driver_data;
831 void *timing_base = ctx->regs + driver_data->timing_base;
832 u32 reg;
833
834 /*
835 * Skips triggering if in triggering state, because multiple triggering
836 * requests can cause panel reset.
837 */
838 if (atomic_read(&ctx->triggering))
839 return;
840
841 /* Enters triggering mode */
842 atomic_set(&ctx->triggering, 1);
843
844 reg = readl(timing_base + TRIGCON);
845 reg |= (TRGMODE_I80_RGB_ENABLE_I80 | SWTRGCMD_I80_RGB_ENABLE);
846 writel(reg, timing_base + TRIGCON);
847
848 /*
849 * Exits triggering mode if vblank is not enabled yet, because when the
850 * VIDINTCON0 register is not set, it can not exit from triggering mode.
851 */
852 if (!test_bit(0, &ctx->irq_flags))
853 atomic_set(&ctx->triggering, 0);
854}
855
856static void fimd_te_handler(struct exynos_drm_crtc *crtc)
857{
858 struct fimd_context *ctx = crtc->ctx;
859
860 /* Checks the crtc is detached already from encoder */
861 if (ctx->pipe < 0 || !ctx->drm_dev)
862 return;
863
864 /*
865 * If there is a page flip request, triggers and handles the page flip
866 * event so that current fb can be updated into panel GRAM.
867 */
868 if (atomic_add_unless(&ctx->win_updated, -1, 0))
869 fimd_trigger(ctx->dev);
870
871 /* Wakes up vsync event queue */
872 if (atomic_read(&ctx->wait_vsync_event)) {
873 atomic_set(&ctx->wait_vsync_event, 0);
874 wake_up(&ctx->wait_vsync_queue);
875 }
876
877 if (test_bit(0, &ctx->irq_flags))
878 drm_crtc_handle_vblank(&ctx->crtc->base);
879}
880
881static void fimd_dp_clock_enable(struct exynos_drm_crtc *crtc, bool enable)
882{
883 struct fimd_context *ctx = crtc->ctx;
884 u32 val;
885
886 /*
887 * Only Exynos 5250, 5260, 5410 and 542x requires enabling DP/MIE
888 * clock. On these SoCs the bootloader may enable it but any
889 * power domain off/on will reset it to disable state.
890 */
891 if (ctx->driver_data != &exynos5_fimd_driver_data &&
892 ctx->driver_data != &exynos5420_fimd_driver_data)
893 return;
894
895 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
896 writel(val, ctx->regs + DP_MIE_CLKCON);
897}
898
899static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
900 .enable = fimd_enable,
901 .disable = fimd_disable,
902 .commit = fimd_commit,
903 .enable_vblank = fimd_enable_vblank,
904 .disable_vblank = fimd_disable_vblank,
905 .wait_for_vblank = fimd_wait_for_vblank,
906 .atomic_begin = fimd_atomic_begin,
907 .update_plane = fimd_update_plane,
908 .disable_plane = fimd_disable_plane,
909 .atomic_flush = fimd_atomic_flush,
910 .te_handler = fimd_te_handler,
911 .clock_enable = fimd_dp_clock_enable,
912};
913
914static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
915{
916 struct fimd_context *ctx = (struct fimd_context *)dev_id;
917 u32 val, clear_bit, start, start_s;
918 int win;
919
920 val = readl(ctx->regs + VIDINTCON1);
921
922 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
923 if (val & clear_bit)
924 writel(clear_bit, ctx->regs + VIDINTCON1);
925
926 /* check the crtc is detached already from encoder */
927 if (ctx->pipe < 0 || !ctx->drm_dev)
928 goto out;
929
930 if (!ctx->i80_if)
931 drm_crtc_handle_vblank(&ctx->crtc->base);
932
933 for (win = 0 ; win < WINDOWS_NR ; win++) {
934 struct exynos_drm_plane *plane = &ctx->planes[win];
935
936 if (!plane->pending_fb)
937 continue;
938
939 start = readl(ctx->regs + VIDWx_BUF_START(win, 0));
940 start_s = readl(ctx->regs + VIDWx_BUF_START_S(win, 0));
941 if (start == start_s)
942 exynos_drm_crtc_finish_update(ctx->crtc, plane);
943 }
944
945 if (ctx->i80_if) {
946 /* Exits triggering mode */
947 atomic_set(&ctx->triggering, 0);
948 } else {
949 /* set wait vsync event to zero and wake up queue. */
950 if (atomic_read(&ctx->wait_vsync_event)) {
951 atomic_set(&ctx->wait_vsync_event, 0);
952 wake_up(&ctx->wait_vsync_queue);
953 }
954 }
955
956out:
957 return IRQ_HANDLED;
958}
959
960static int fimd_bind(struct device *dev, struct device *master, void *data)
961{
962 struct fimd_context *ctx = dev_get_drvdata(dev);
963 struct drm_device *drm_dev = data;
964 struct exynos_drm_private *priv = drm_dev->dev_private;
965 struct exynos_drm_plane *exynos_plane;
966 unsigned int i;
967 int ret;
968
969 ctx->drm_dev = drm_dev;
970 ctx->pipe = priv->pipe++;
971
972 for (i = 0; i < WINDOWS_NR; i++) {
973 ctx->configs[i].pixel_formats = fimd_formats;
974 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
975 ctx->configs[i].zpos = i;
976 ctx->configs[i].type = fimd_win_types[i];
977 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
978 1 << ctx->pipe, &ctx->configs[i]);
979 if (ret)
980 return ret;
981 }
982
983 exynos_plane = &ctx->planes[DEFAULT_WIN];
984 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
985 ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
986 &fimd_crtc_ops, ctx);
987 if (IS_ERR(ctx->crtc))
988 return PTR_ERR(ctx->crtc);
989
990 if (ctx->encoder)
991 exynos_dpi_bind(drm_dev, ctx->encoder);
992
993 if (is_drm_iommu_supported(drm_dev))
994 fimd_clear_channels(ctx->crtc);
995
996 ret = drm_iommu_attach_device(drm_dev, dev);
997 if (ret)
998 priv->pipe--;
999
1000 return ret;
1001}
1002
1003static void fimd_unbind(struct device *dev, struct device *master,
1004 void *data)
1005{
1006 struct fimd_context *ctx = dev_get_drvdata(dev);
1007
1008 fimd_disable(ctx->crtc);
1009
1010 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
1011
1012 if (ctx->encoder)
1013 exynos_dpi_remove(ctx->encoder);
1014}
1015
1016static const struct component_ops fimd_component_ops = {
1017 .bind = fimd_bind,
1018 .unbind = fimd_unbind,
1019};
1020
1021static int fimd_probe(struct platform_device *pdev)
1022{
1023 struct device *dev = &pdev->dev;
1024 struct fimd_context *ctx;
1025 struct device_node *i80_if_timings;
1026 struct resource *res;
1027 int ret;
1028
1029 if (!dev->of_node)
1030 return -ENODEV;
1031
1032 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1033 if (!ctx)
1034 return -ENOMEM;
1035
1036 ctx->dev = dev;
1037 ctx->suspended = true;
1038 ctx->driver_data = drm_fimd_get_driver_data(pdev);
1039
1040 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1041 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1042 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1043 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1044
1045 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1046 if (i80_if_timings) {
1047 u32 val;
1048
1049 ctx->i80_if = true;
1050
1051 if (ctx->driver_data->has_vidoutcon)
1052 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1053 else
1054 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1055 /*
1056 * The user manual describes that this "DSI_EN" bit is required
1057 * to enable I80 24-bit data interface.
1058 */
1059 ctx->vidcon0 |= VIDCON0_DSI_EN;
1060
1061 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1062 val = 0;
1063 ctx->i80ifcon = LCD_CS_SETUP(val);
1064 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1065 val = 0;
1066 ctx->i80ifcon |= LCD_WR_SETUP(val);
1067 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1068 val = 1;
1069 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1070 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1071 val = 0;
1072 ctx->i80ifcon |= LCD_WR_HOLD(val);
1073 }
1074 of_node_put(i80_if_timings);
1075
1076 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1077 "samsung,sysreg");
1078 if (IS_ERR(ctx->sysreg)) {
1079 dev_warn(dev, "failed to get system register.\n");
1080 ctx->sysreg = NULL;
1081 }
1082
1083 ctx->bus_clk = devm_clk_get(dev, "fimd");
1084 if (IS_ERR(ctx->bus_clk)) {
1085 dev_err(dev, "failed to get bus clock\n");
1086 return PTR_ERR(ctx->bus_clk);
1087 }
1088
1089 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1090 if (IS_ERR(ctx->lcd_clk)) {
1091 dev_err(dev, "failed to get lcd clock\n");
1092 return PTR_ERR(ctx->lcd_clk);
1093 }
1094
1095 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1096
1097 ctx->regs = devm_ioremap_resource(dev, res);
1098 if (IS_ERR(ctx->regs))
1099 return PTR_ERR(ctx->regs);
1100
1101 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1102 ctx->i80_if ? "lcd_sys" : "vsync");
1103 if (!res) {
1104 dev_err(dev, "irq request failed.\n");
1105 return -ENXIO;
1106 }
1107
1108 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1109 0, "drm_fimd", ctx);
1110 if (ret) {
1111 dev_err(dev, "irq request failed.\n");
1112 return ret;
1113 }
1114
1115 init_waitqueue_head(&ctx->wait_vsync_queue);
1116 atomic_set(&ctx->wait_vsync_event, 0);
1117
1118 platform_set_drvdata(pdev, ctx);
1119
1120 ctx->encoder = exynos_dpi_probe(dev);
1121 if (IS_ERR(ctx->encoder))
1122 return PTR_ERR(ctx->encoder);
1123
1124 pm_runtime_enable(dev);
1125
1126 ret = component_add(dev, &fimd_component_ops);
1127 if (ret)
1128 goto err_disable_pm_runtime;
1129
1130 return ret;
1131
1132err_disable_pm_runtime:
1133 pm_runtime_disable(dev);
1134
1135 return ret;
1136}
1137
1138static int fimd_remove(struct platform_device *pdev)
1139{
1140 pm_runtime_disable(&pdev->dev);
1141
1142 component_del(&pdev->dev, &fimd_component_ops);
1143
1144 return 0;
1145}
1146
1147#ifdef CONFIG_PM
1148static int exynos_fimd_suspend(struct device *dev)
1149{
1150 struct fimd_context *ctx = dev_get_drvdata(dev);
1151
1152 clk_disable_unprepare(ctx->lcd_clk);
1153 clk_disable_unprepare(ctx->bus_clk);
1154
1155 return 0;
1156}
1157
1158static int exynos_fimd_resume(struct device *dev)
1159{
1160 struct fimd_context *ctx = dev_get_drvdata(dev);
1161 int ret;
1162
1163 ret = clk_prepare_enable(ctx->bus_clk);
1164 if (ret < 0) {
1165 DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
1166 return ret;
1167 }
1168
1169 ret = clk_prepare_enable(ctx->lcd_clk);
1170 if (ret < 0) {
1171 DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
1172 return ret;
1173 }
1174
1175 return 0;
1176}
1177#endif
1178
1179static const struct dev_pm_ops exynos_fimd_pm_ops = {
1180 SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1181};
1182
1183struct platform_driver fimd_driver = {
1184 .probe = fimd_probe,
1185 .remove = fimd_remove,
1186 .driver = {
1187 .name = "exynos4-fb",
1188 .owner = THIS_MODULE,
1189 .pm = &exynos_fimd_pm_ops,
1190 .of_match_table = fimd_driver_dt_match,
1191 },
1192};
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
95struct fimd_driver_data {
96 unsigned int timing_base;
97 unsigned int lcdblk_offset;
98 unsigned int lcdblk_vt_shift;
99 unsigned int lcdblk_bypass_shift;
100 unsigned int lcdblk_mic_bypass_shift;
101 unsigned int trg_type;
102
103 unsigned int has_shadowcon:1;
104 unsigned int has_clksel:1;
105 unsigned int has_limited_fmt:1;
106 unsigned int has_vidoutcon:1;
107 unsigned int has_vtsel:1;
108 unsigned int has_mic_bypass:1;
109 unsigned int has_dp_clk:1;
110 unsigned int has_hw_trigger:1;
111 unsigned int has_trigger_per_te:1;
112};
113
114static struct fimd_driver_data s3c64xx_fimd_driver_data = {
115 .timing_base = 0x0,
116 .has_clksel = 1,
117 .has_limited_fmt = 1,
118};
119
120static struct fimd_driver_data s5pv210_fimd_driver_data = {
121 .timing_base = 0x0,
122 .has_shadowcon = 1,
123 .has_clksel = 1,
124};
125
126static struct fimd_driver_data exynos3_fimd_driver_data = {
127 .timing_base = 0x20000,
128 .lcdblk_offset = 0x210,
129 .lcdblk_bypass_shift = 1,
130 .has_shadowcon = 1,
131 .has_vidoutcon = 1,
132};
133
134static 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
143static struct fimd_driver_data exynos5_fimd_driver_data = {
144 .timing_base = 0x20000,
145 .lcdblk_offset = 0x214,
146 .lcdblk_vt_shift = 24,
147 .lcdblk_bypass_shift = 15,
148 .has_shadowcon = 1,
149 .has_vidoutcon = 1,
150 .has_vtsel = 1,
151 .has_dp_clk = 1,
152};
153
154static struct fimd_driver_data exynos5420_fimd_driver_data = {
155 .timing_base = 0x20000,
156 .lcdblk_offset = 0x214,
157 .lcdblk_vt_shift = 24,
158 .lcdblk_bypass_shift = 15,
159 .lcdblk_mic_bypass_shift = 11,
160 .has_shadowcon = 1,
161 .has_vidoutcon = 1,
162 .has_vtsel = 1,
163 .has_mic_bypass = 1,
164 .has_dp_clk = 1,
165};
166
167struct fimd_context {
168 struct device *dev;
169 struct drm_device *drm_dev;
170 struct exynos_drm_crtc *crtc;
171 struct exynos_drm_plane planes[WINDOWS_NR];
172 struct exynos_drm_plane_config configs[WINDOWS_NR];
173 struct clk *bus_clk;
174 struct clk *lcd_clk;
175 void __iomem *regs;
176 struct regmap *sysreg;
177 unsigned long irq_flags;
178 u32 vidcon0;
179 u32 vidcon1;
180 u32 vidout_con;
181 u32 i80ifcon;
182 bool i80_if;
183 bool suspended;
184 wait_queue_head_t wait_vsync_queue;
185 atomic_t wait_vsync_event;
186 atomic_t win_updated;
187 atomic_t triggering;
188 u32 clkdiv;
189
190 const struct fimd_driver_data *driver_data;
191 struct drm_encoder *encoder;
192 struct exynos_drm_clk dp_clk;
193};
194
195static const struct of_device_id fimd_driver_dt_match[] = {
196 { .compatible = "samsung,s3c6400-fimd",
197 .data = &s3c64xx_fimd_driver_data },
198 { .compatible = "samsung,s5pv210-fimd",
199 .data = &s5pv210_fimd_driver_data },
200 { .compatible = "samsung,exynos3250-fimd",
201 .data = &exynos3_fimd_driver_data },
202 { .compatible = "samsung,exynos4210-fimd",
203 .data = &exynos4_fimd_driver_data },
204 { .compatible = "samsung,exynos5250-fimd",
205 .data = &exynos5_fimd_driver_data },
206 { .compatible = "samsung,exynos5420-fimd",
207 .data = &exynos5420_fimd_driver_data },
208 {},
209};
210MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
211
212static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
213 DRM_PLANE_TYPE_PRIMARY,
214 DRM_PLANE_TYPE_OVERLAY,
215 DRM_PLANE_TYPE_OVERLAY,
216 DRM_PLANE_TYPE_OVERLAY,
217 DRM_PLANE_TYPE_CURSOR,
218};
219
220static const uint32_t fimd_formats[] = {
221 DRM_FORMAT_C8,
222 DRM_FORMAT_XRGB1555,
223 DRM_FORMAT_RGB565,
224 DRM_FORMAT_XRGB8888,
225 DRM_FORMAT_ARGB8888,
226};
227
228static const unsigned int capabilities[WINDOWS_NR] = {
229 0,
230 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
231 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
232 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
233 EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
234};
235
236static inline void fimd_set_bits(struct fimd_context *ctx, u32 reg, u32 mask,
237 u32 val)
238{
239 val = (val & mask) | (readl(ctx->regs + reg) & ~mask);
240 writel(val, ctx->regs + reg);
241}
242
243static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
244{
245 struct fimd_context *ctx = crtc->ctx;
246 u32 val;
247
248 if (ctx->suspended)
249 return -EPERM;
250
251 if (!test_and_set_bit(0, &ctx->irq_flags)) {
252 val = readl(ctx->regs + VIDINTCON0);
253
254 val |= VIDINTCON0_INT_ENABLE;
255
256 if (ctx->i80_if) {
257 val |= VIDINTCON0_INT_I80IFDONE;
258 val |= VIDINTCON0_INT_SYSMAINCON;
259 val &= ~VIDINTCON0_INT_SYSSUBCON;
260 } else {
261 val |= VIDINTCON0_INT_FRAME;
262
263 val &= ~VIDINTCON0_FRAMESEL0_MASK;
264 val |= VIDINTCON0_FRAMESEL0_FRONTPORCH;
265 val &= ~VIDINTCON0_FRAMESEL1_MASK;
266 val |= VIDINTCON0_FRAMESEL1_NONE;
267 }
268
269 writel(val, ctx->regs + VIDINTCON0);
270 }
271
272 return 0;
273}
274
275static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
276{
277 struct fimd_context *ctx = crtc->ctx;
278 u32 val;
279
280 if (ctx->suspended)
281 return;
282
283 if (test_and_clear_bit(0, &ctx->irq_flags)) {
284 val = readl(ctx->regs + VIDINTCON0);
285
286 val &= ~VIDINTCON0_INT_ENABLE;
287
288 if (ctx->i80_if) {
289 val &= ~VIDINTCON0_INT_I80IFDONE;
290 val &= ~VIDINTCON0_INT_SYSMAINCON;
291 val &= ~VIDINTCON0_INT_SYSSUBCON;
292 } else
293 val &= ~VIDINTCON0_INT_FRAME;
294
295 writel(val, ctx->regs + VIDINTCON0);
296 }
297}
298
299static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
300{
301 struct fimd_context *ctx = crtc->ctx;
302
303 if (ctx->suspended)
304 return;
305
306 atomic_set(&ctx->wait_vsync_event, 1);
307
308 /*
309 * wait for FIMD to signal VSYNC interrupt or return after
310 * timeout which is set to 50ms (refresh rate of 20).
311 */
312 if (!wait_event_timeout(ctx->wait_vsync_queue,
313 !atomic_read(&ctx->wait_vsync_event),
314 HZ/20))
315 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
316}
317
318static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
319 bool enable)
320{
321 u32 val = readl(ctx->regs + WINCON(win));
322
323 if (enable)
324 val |= WINCONx_ENWIN;
325 else
326 val &= ~WINCONx_ENWIN;
327
328 writel(val, ctx->regs + WINCON(win));
329}
330
331static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
332 unsigned int win,
333 bool enable)
334{
335 u32 val = readl(ctx->regs + SHADOWCON);
336
337 if (enable)
338 val |= SHADOWCON_CHx_ENABLE(win);
339 else
340 val &= ~SHADOWCON_CHx_ENABLE(win);
341
342 writel(val, ctx->regs + SHADOWCON);
343}
344
345static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
346{
347 struct fimd_context *ctx = crtc->ctx;
348 unsigned int win, ch_enabled = 0;
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 ctx->suspended = false;
374
375 fimd_enable_vblank(ctx->crtc);
376 fimd_wait_for_vblank(ctx->crtc);
377 fimd_disable_vblank(ctx->crtc);
378
379 ctx->suspended = true;
380 }
381
382 clk_disable_unprepare(ctx->lcd_clk);
383 clk_disable_unprepare(ctx->bus_clk);
384
385 pm_runtime_put(ctx->dev);
386}
387
388
389static int fimd_atomic_check(struct exynos_drm_crtc *crtc,
390 struct drm_crtc_state *state)
391{
392 struct drm_display_mode *mode = &state->adjusted_mode;
393 struct fimd_context *ctx = crtc->ctx;
394 unsigned long ideal_clk, lcd_rate;
395 u32 clkdiv;
396
397 if (mode->clock == 0) {
398 DRM_DEV_ERROR(ctx->dev, "Mode has zero clock value.\n");
399 return -EINVAL;
400 }
401
402 ideal_clk = mode->clock * 1000;
403
404 if (ctx->i80_if) {
405 /*
406 * The frame done interrupt should be occurred prior to the
407 * next TE signal.
408 */
409 ideal_clk *= 2;
410 }
411
412 lcd_rate = clk_get_rate(ctx->lcd_clk);
413 if (2 * lcd_rate < ideal_clk) {
414 DRM_DEV_ERROR(ctx->dev,
415 "sclk_fimd clock too low(%lu) for requested pixel clock(%lu)\n",
416 lcd_rate, ideal_clk);
417 return -EINVAL;
418 }
419
420 /* Find the clock divider value that gets us closest to ideal_clk */
421 clkdiv = DIV_ROUND_CLOSEST(lcd_rate, ideal_clk);
422 if (clkdiv >= 0x200) {
423 DRM_DEV_ERROR(ctx->dev, "requested pixel clock(%lu) too low\n",
424 ideal_clk);
425 return -EINVAL;
426 }
427
428 ctx->clkdiv = (clkdiv < 0x100) ? clkdiv : 0xff;
429
430 return 0;
431}
432
433static void fimd_setup_trigger(struct fimd_context *ctx)
434{
435 void __iomem *timing_base = ctx->regs + ctx->driver_data->timing_base;
436 u32 trg_type = ctx->driver_data->trg_type;
437 u32 val = readl(timing_base + TRIGCON);
438
439 val &= ~(TRGMODE_ENABLE);
440
441 if (trg_type == I80_HW_TRG) {
442 if (ctx->driver_data->has_hw_trigger)
443 val |= HWTRGEN_ENABLE | HWTRGMASK_ENABLE;
444 if (ctx->driver_data->has_trigger_per_te)
445 val |= HWTRIGEN_PER_ENABLE;
446 } else {
447 val |= TRGMODE_ENABLE;
448 }
449
450 writel(val, timing_base + TRIGCON);
451}
452
453static void fimd_commit(struct exynos_drm_crtc *crtc)
454{
455 struct fimd_context *ctx = crtc->ctx;
456 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
457 const struct fimd_driver_data *driver_data = ctx->driver_data;
458 void *timing_base = ctx->regs + driver_data->timing_base;
459 u32 val;
460
461 if (ctx->suspended)
462 return;
463
464 /* nothing to do if we haven't set the mode yet */
465 if (mode->htotal == 0 || mode->vtotal == 0)
466 return;
467
468 if (ctx->i80_if) {
469 val = ctx->i80ifcon | I80IFEN_ENABLE;
470 writel(val, timing_base + I80IFCONFAx(0));
471
472 /* disable auto frame rate */
473 writel(0, timing_base + I80IFCONFBx(0));
474
475 /* set video type selection to I80 interface */
476 if (driver_data->has_vtsel && ctx->sysreg &&
477 regmap_update_bits(ctx->sysreg,
478 driver_data->lcdblk_offset,
479 0x3 << driver_data->lcdblk_vt_shift,
480 0x1 << driver_data->lcdblk_vt_shift)) {
481 DRM_DEV_ERROR(ctx->dev,
482 "Failed to update sysreg for I80 i/f.\n");
483 return;
484 }
485 } else {
486 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
487 u32 vidcon1;
488
489 /* setup polarity values */
490 vidcon1 = ctx->vidcon1;
491 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
492 vidcon1 |= VIDCON1_INV_VSYNC;
493 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
494 vidcon1 |= VIDCON1_INV_HSYNC;
495 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
496
497 /* setup vertical timing values. */
498 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
499 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
500 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
501
502 val = VIDTCON0_VBPD(vbpd - 1) |
503 VIDTCON0_VFPD(vfpd - 1) |
504 VIDTCON0_VSPW(vsync_len - 1);
505 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
506
507 /* setup horizontal timing values. */
508 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
509 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
510 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
511
512 val = VIDTCON1_HBPD(hbpd - 1) |
513 VIDTCON1_HFPD(hfpd - 1) |
514 VIDTCON1_HSPW(hsync_len - 1);
515 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
516 }
517
518 if (driver_data->has_vidoutcon)
519 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
520
521 /* set bypass selection */
522 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
523 driver_data->lcdblk_offset,
524 0x1 << driver_data->lcdblk_bypass_shift,
525 0x1 << driver_data->lcdblk_bypass_shift)) {
526 DRM_DEV_ERROR(ctx->dev,
527 "Failed to update sysreg for bypass setting.\n");
528 return;
529 }
530
531 /* TODO: When MIC is enabled for display path, the lcdblk_mic_bypass
532 * bit should be cleared.
533 */
534 if (driver_data->has_mic_bypass && ctx->sysreg &&
535 regmap_update_bits(ctx->sysreg,
536 driver_data->lcdblk_offset,
537 0x1 << driver_data->lcdblk_mic_bypass_shift,
538 0x1 << driver_data->lcdblk_mic_bypass_shift)) {
539 DRM_DEV_ERROR(ctx->dev,
540 "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
569static void fimd_win_set_bldeq(struct fimd_context *ctx, unsigned int win,
570 unsigned int alpha, unsigned int pixel_alpha)
571{
572 u32 mask = BLENDEQ_A_FUNC_F(0xf) | BLENDEQ_B_FUNC_F(0xf);
573 u32 val = 0;
574
575 switch (pixel_alpha) {
576 case DRM_MODE_BLEND_PIXEL_NONE:
577 case DRM_MODE_BLEND_COVERAGE:
578 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ALPHA_A);
579 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
580 break;
581 case DRM_MODE_BLEND_PREMULTI:
582 default:
583 if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
584 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ALPHA0);
585 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
586 } else {
587 val |= BLENDEQ_A_FUNC_F(BLENDEQ_ONE);
588 val |= BLENDEQ_B_FUNC_F(BLENDEQ_ONE_MINUS_ALPHA_A);
589 }
590 break;
591 }
592 fimd_set_bits(ctx, BLENDEQx(win), mask, val);
593}
594
595static void fimd_win_set_bldmod(struct fimd_context *ctx, unsigned int win,
596 unsigned int alpha, unsigned int pixel_alpha)
597{
598 u32 win_alpha_l = (alpha >> 8) & 0xf;
599 u32 win_alpha_h = alpha >> 12;
600 u32 val = 0;
601
602 switch (pixel_alpha) {
603 case DRM_MODE_BLEND_PIXEL_NONE:
604 break;
605 case DRM_MODE_BLEND_COVERAGE:
606 case DRM_MODE_BLEND_PREMULTI:
607 default:
608 val |= WINCON1_ALPHA_SEL;
609 val |= WINCON1_BLD_PIX;
610 val |= WINCON1_ALPHA_MUL;
611 break;
612 }
613 fimd_set_bits(ctx, WINCON(win), WINCONx_BLEND_MODE_MASK, val);
614
615 /* OSD alpha */
616 val = VIDISD14C_ALPHA0_R(win_alpha_h) |
617 VIDISD14C_ALPHA0_G(win_alpha_h) |
618 VIDISD14C_ALPHA0_B(win_alpha_h) |
619 VIDISD14C_ALPHA1_R(0x0) |
620 VIDISD14C_ALPHA1_G(0x0) |
621 VIDISD14C_ALPHA1_B(0x0);
622 writel(val, ctx->regs + VIDOSD_C(win));
623
624 val = VIDW_ALPHA_R(win_alpha_l) | VIDW_ALPHA_G(win_alpha_l) |
625 VIDW_ALPHA_B(win_alpha_l);
626 writel(val, ctx->regs + VIDWnALPHA0(win));
627
628 val = VIDW_ALPHA_R(0x0) | VIDW_ALPHA_G(0x0) |
629 VIDW_ALPHA_B(0x0);
630 writel(val, ctx->regs + VIDWnALPHA1(win));
631
632 fimd_set_bits(ctx, BLENDCON, BLENDCON_NEW_MASK,
633 BLENDCON_NEW_8BIT_ALPHA_VALUE);
634}
635
636static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
637 struct drm_framebuffer *fb, int width)
638{
639 struct exynos_drm_plane plane = ctx->planes[win];
640 struct exynos_drm_plane_state *state =
641 to_exynos_plane_state(plane.base.state);
642 uint32_t pixel_format = fb->format->format;
643 unsigned int alpha = state->base.alpha;
644 u32 val = WINCONx_ENWIN;
645 unsigned int pixel_alpha;
646
647 if (fb->format->has_alpha)
648 pixel_alpha = state->base.pixel_blend_mode;
649 else
650 pixel_alpha = DRM_MODE_BLEND_PIXEL_NONE;
651
652 /*
653 * In case of s3c64xx, window 0 doesn't support alpha channel.
654 * So the request format is ARGB8888 then change it to XRGB8888.
655 */
656 if (ctx->driver_data->has_limited_fmt && !win) {
657 if (pixel_format == DRM_FORMAT_ARGB8888)
658 pixel_format = DRM_FORMAT_XRGB8888;
659 }
660
661 switch (pixel_format) {
662 case DRM_FORMAT_C8:
663 val |= WINCON0_BPPMODE_8BPP_PALETTE;
664 val |= WINCONx_BURSTLEN_8WORD;
665 val |= WINCONx_BYTSWP;
666 break;
667 case DRM_FORMAT_XRGB1555:
668 val |= WINCON0_BPPMODE_16BPP_1555;
669 val |= WINCONx_HAWSWP;
670 val |= WINCONx_BURSTLEN_16WORD;
671 break;
672 case DRM_FORMAT_RGB565:
673 val |= WINCON0_BPPMODE_16BPP_565;
674 val |= WINCONx_HAWSWP;
675 val |= WINCONx_BURSTLEN_16WORD;
676 break;
677 case DRM_FORMAT_XRGB8888:
678 val |= WINCON0_BPPMODE_24BPP_888;
679 val |= WINCONx_WSWP;
680 val |= WINCONx_BURSTLEN_16WORD;
681 break;
682 case DRM_FORMAT_ARGB8888:
683 default:
684 val |= WINCON1_BPPMODE_25BPP_A1888;
685 val |= WINCONx_WSWP;
686 val |= WINCONx_BURSTLEN_16WORD;
687 break;
688 }
689
690 /*
691 * Setting dma-burst to 16Word causes permanent tearing for very small
692 * buffers, e.g. cursor buffer. Burst Mode switching which based on
693 * plane size is not recommended as plane size varies alot towards the
694 * end of the screen and rapid movement causes unstable DMA, but it is
695 * still better to change dma-burst than displaying garbage.
696 */
697
698 if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
699 val &= ~WINCONx_BURSTLEN_MASK;
700 val |= WINCONx_BURSTLEN_4WORD;
701 }
702 fimd_set_bits(ctx, WINCON(win), ~WINCONx_BLEND_MODE_MASK, val);
703
704 /* hardware window 0 doesn't support alpha channel. */
705 if (win != 0) {
706 fimd_win_set_bldmod(ctx, win, alpha, pixel_alpha);
707 fimd_win_set_bldeq(ctx, win, alpha, pixel_alpha);
708 }
709}
710
711static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
712{
713 unsigned int keycon0 = 0, keycon1 = 0;
714
715 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
716 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
717
718 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
719
720 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
721 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
722}
723
724/**
725 * shadow_protect_win() - disable updating values from shadow registers at vsync
726 *
727 * @win: window to protect registers for
728 * @protect: 1 to protect (disable updates)
729 */
730static void fimd_shadow_protect_win(struct fimd_context *ctx,
731 unsigned int win, bool protect)
732{
733 u32 reg, bits, val;
734
735 /*
736 * SHADOWCON/PRTCON register is used for enabling timing.
737 *
738 * for example, once only width value of a register is set,
739 * if the dma is started then fimd hardware could malfunction so
740 * with protect window setting, the register fields with prefix '_F'
741 * wouldn't be updated at vsync also but updated once unprotect window
742 * is set.
743 */
744
745 if (ctx->driver_data->has_shadowcon) {
746 reg = SHADOWCON;
747 bits = SHADOWCON_WINx_PROTECT(win);
748 } else {
749 reg = PRTCON;
750 bits = PRTCON_PROTECT;
751 }
752
753 val = readl(ctx->regs + reg);
754 if (protect)
755 val |= bits;
756 else
757 val &= ~bits;
758 writel(val, ctx->regs + reg);
759}
760
761static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
762{
763 struct fimd_context *ctx = crtc->ctx;
764 int i;
765
766 if (ctx->suspended)
767 return;
768
769 for (i = 0; i < WINDOWS_NR; i++)
770 fimd_shadow_protect_win(ctx, i, true);
771}
772
773static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
774{
775 struct fimd_context *ctx = crtc->ctx;
776 int i;
777
778 if (ctx->suspended)
779 return;
780
781 for (i = 0; i < WINDOWS_NR; i++)
782 fimd_shadow_protect_win(ctx, i, false);
783
784 exynos_crtc_handle_event(crtc);
785}
786
787static void fimd_update_plane(struct exynos_drm_crtc *crtc,
788 struct exynos_drm_plane *plane)
789{
790 struct exynos_drm_plane_state *state =
791 to_exynos_plane_state(plane->base.state);
792 struct fimd_context *ctx = crtc->ctx;
793 struct drm_framebuffer *fb = state->base.fb;
794 dma_addr_t dma_addr;
795 unsigned long val, size, offset;
796 unsigned int last_x, last_y, buf_offsize, line_size;
797 unsigned int win = plane->index;
798 unsigned int cpp = fb->format->cpp[0];
799 unsigned int pitch = fb->pitches[0];
800
801 if (ctx->suspended)
802 return;
803
804 offset = state->src.x * cpp;
805 offset += state->src.y * pitch;
806
807 /* buffer start address */
808 dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
809 val = (unsigned long)dma_addr;
810 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
811
812 /* buffer end address */
813 size = pitch * state->crtc.h;
814 val = (unsigned long)(dma_addr + size);
815 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
816
817 DRM_DEV_DEBUG_KMS(ctx->dev,
818 "start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
819 (unsigned long)dma_addr, val, size);
820 DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
821 state->crtc.w, state->crtc.h);
822
823 /* buffer size */
824 buf_offsize = pitch - (state->crtc.w * cpp);
825 line_size = state->crtc.w * cpp;
826 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
827 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
828 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
829 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
830 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
831
832 /* OSD position */
833 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
834 VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
835 VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
836 VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
837 writel(val, ctx->regs + VIDOSD_A(win));
838
839 last_x = state->crtc.x + state->crtc.w;
840 if (last_x)
841 last_x--;
842 last_y = state->crtc.y + state->crtc.h;
843 if (last_y)
844 last_y--;
845
846 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
847 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
848
849 writel(val, ctx->regs + VIDOSD_B(win));
850
851 DRM_DEV_DEBUG_KMS(ctx->dev,
852 "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
853 state->crtc.x, state->crtc.y, last_x, last_y);
854
855 /* OSD size */
856 if (win != 3 && win != 4) {
857 u32 offset = VIDOSD_D(win);
858 if (win == 0)
859 offset = VIDOSD_C(win);
860 val = state->crtc.w * state->crtc.h;
861 writel(val, ctx->regs + offset);
862
863 DRM_DEV_DEBUG_KMS(ctx->dev, "osd size = 0x%x\n",
864 (unsigned int)val);
865 }
866
867 fimd_win_set_pixfmt(ctx, win, fb, state->src.w);
868
869 /* hardware window 0 doesn't support color key. */
870 if (win != 0)
871 fimd_win_set_colkey(ctx, win);
872
873 fimd_enable_video_output(ctx, win, true);
874
875 if (ctx->driver_data->has_shadowcon)
876 fimd_enable_shadow_channel_path(ctx, win, true);
877
878 if (ctx->i80_if)
879 atomic_set(&ctx->win_updated, 1);
880}
881
882static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
883 struct exynos_drm_plane *plane)
884{
885 struct fimd_context *ctx = crtc->ctx;
886 unsigned int win = plane->index;
887
888 if (ctx->suspended)
889 return;
890
891 fimd_enable_video_output(ctx, win, false);
892
893 if (ctx->driver_data->has_shadowcon)
894 fimd_enable_shadow_channel_path(ctx, win, false);
895}
896
897static void fimd_enable(struct exynos_drm_crtc *crtc)
898{
899 struct fimd_context *ctx = crtc->ctx;
900
901 if (!ctx->suspended)
902 return;
903
904 ctx->suspended = false;
905
906 pm_runtime_get_sync(ctx->dev);
907
908 /* if vblank was enabled status, enable it again. */
909 if (test_and_clear_bit(0, &ctx->irq_flags))
910 fimd_enable_vblank(ctx->crtc);
911
912 fimd_commit(ctx->crtc);
913}
914
915static void fimd_disable(struct exynos_drm_crtc *crtc)
916{
917 struct fimd_context *ctx = crtc->ctx;
918 int i;
919
920 if (ctx->suspended)
921 return;
922
923 /*
924 * We need to make sure that all windows are disabled before we
925 * suspend that connector. Otherwise we might try to scan from
926 * a destroyed buffer later.
927 */
928 for (i = 0; i < WINDOWS_NR; i++)
929 fimd_disable_plane(crtc, &ctx->planes[i]);
930
931 fimd_enable_vblank(crtc);
932 fimd_wait_for_vblank(crtc);
933 fimd_disable_vblank(crtc);
934
935 writel(0, ctx->regs + VIDCON0);
936
937 pm_runtime_put_sync(ctx->dev);
938 ctx->suspended = true;
939}
940
941static void fimd_trigger(struct device *dev)
942{
943 struct fimd_context *ctx = dev_get_drvdata(dev);
944 const struct fimd_driver_data *driver_data = ctx->driver_data;
945 void *timing_base = ctx->regs + driver_data->timing_base;
946 u32 reg;
947
948 /*
949 * Skips triggering if in triggering state, because multiple triggering
950 * requests can cause panel reset.
951 */
952 if (atomic_read(&ctx->triggering))
953 return;
954
955 /* Enters triggering mode */
956 atomic_set(&ctx->triggering, 1);
957
958 reg = readl(timing_base + TRIGCON);
959 reg |= (TRGMODE_ENABLE | SWTRGCMD_ENABLE);
960 writel(reg, timing_base + TRIGCON);
961
962 /*
963 * Exits triggering mode if vblank is not enabled yet, because when the
964 * VIDINTCON0 register is not set, it can not exit from triggering mode.
965 */
966 if (!test_bit(0, &ctx->irq_flags))
967 atomic_set(&ctx->triggering, 0);
968}
969
970static void fimd_te_handler(struct exynos_drm_crtc *crtc)
971{
972 struct fimd_context *ctx = crtc->ctx;
973 u32 trg_type = ctx->driver_data->trg_type;
974
975 /* Checks the crtc is detached already from encoder */
976 if (!ctx->drm_dev)
977 return;
978
979 if (trg_type == I80_HW_TRG)
980 goto out;
981
982 /*
983 * If there is a page flip request, triggers and handles the page flip
984 * event so that current fb can be updated into panel GRAM.
985 */
986 if (atomic_add_unless(&ctx->win_updated, -1, 0))
987 fimd_trigger(ctx->dev);
988
989out:
990 /* Wakes up vsync event queue */
991 if (atomic_read(&ctx->wait_vsync_event)) {
992 atomic_set(&ctx->wait_vsync_event, 0);
993 wake_up(&ctx->wait_vsync_queue);
994 }
995
996 if (test_bit(0, &ctx->irq_flags))
997 drm_crtc_handle_vblank(&ctx->crtc->base);
998}
999
1000static void fimd_dp_clock_enable(struct exynos_drm_clk *clk, bool enable)
1001{
1002 struct fimd_context *ctx = container_of(clk, struct fimd_context,
1003 dp_clk);
1004 u32 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
1005 writel(val, ctx->regs + DP_MIE_CLKCON);
1006}
1007
1008static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
1009 .enable = fimd_enable,
1010 .disable = fimd_disable,
1011 .enable_vblank = fimd_enable_vblank,
1012 .disable_vblank = fimd_disable_vblank,
1013 .atomic_begin = fimd_atomic_begin,
1014 .update_plane = fimd_update_plane,
1015 .disable_plane = fimd_disable_plane,
1016 .atomic_flush = fimd_atomic_flush,
1017 .atomic_check = fimd_atomic_check,
1018 .te_handler = fimd_te_handler,
1019};
1020
1021static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
1022{
1023 struct fimd_context *ctx = (struct fimd_context *)dev_id;
1024 u32 val, clear_bit;
1025
1026 val = readl(ctx->regs + VIDINTCON1);
1027
1028 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
1029 if (val & clear_bit)
1030 writel(clear_bit, ctx->regs + VIDINTCON1);
1031
1032 /* check the crtc is detached already from encoder */
1033 if (!ctx->drm_dev)
1034 goto out;
1035
1036 if (!ctx->i80_if)
1037 drm_crtc_handle_vblank(&ctx->crtc->base);
1038
1039 if (ctx->i80_if) {
1040 /* Exits triggering mode */
1041 atomic_set(&ctx->triggering, 0);
1042 } else {
1043 /* set wait vsync event to zero and wake up queue. */
1044 if (atomic_read(&ctx->wait_vsync_event)) {
1045 atomic_set(&ctx->wait_vsync_event, 0);
1046 wake_up(&ctx->wait_vsync_queue);
1047 }
1048 }
1049
1050out:
1051 return IRQ_HANDLED;
1052}
1053
1054static int fimd_bind(struct device *dev, struct device *master, void *data)
1055{
1056 struct fimd_context *ctx = dev_get_drvdata(dev);
1057 struct drm_device *drm_dev = data;
1058 struct exynos_drm_plane *exynos_plane;
1059 unsigned int i;
1060 int ret;
1061
1062 ctx->drm_dev = drm_dev;
1063
1064 for (i = 0; i < WINDOWS_NR; i++) {
1065 ctx->configs[i].pixel_formats = fimd_formats;
1066 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
1067 ctx->configs[i].zpos = i;
1068 ctx->configs[i].type = fimd_win_types[i];
1069 ctx->configs[i].capabilities = capabilities[i];
1070 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
1071 &ctx->configs[i]);
1072 if (ret)
1073 return ret;
1074 }
1075
1076 exynos_plane = &ctx->planes[DEFAULT_WIN];
1077 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
1078 EXYNOS_DISPLAY_TYPE_LCD, &fimd_crtc_ops, ctx);
1079 if (IS_ERR(ctx->crtc))
1080 return PTR_ERR(ctx->crtc);
1081
1082 if (ctx->driver_data->has_dp_clk) {
1083 ctx->dp_clk.enable = fimd_dp_clock_enable;
1084 ctx->crtc->pipe_clk = &ctx->dp_clk;
1085 }
1086
1087 if (ctx->encoder)
1088 exynos_dpi_bind(drm_dev, ctx->encoder);
1089
1090 if (is_drm_iommu_supported(drm_dev))
1091 fimd_clear_channels(ctx->crtc);
1092
1093 return exynos_drm_register_dma(drm_dev, dev);
1094}
1095
1096static void fimd_unbind(struct device *dev, struct device *master,
1097 void *data)
1098{
1099 struct fimd_context *ctx = dev_get_drvdata(dev);
1100
1101 fimd_disable(ctx->crtc);
1102
1103 exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev);
1104
1105 if (ctx->encoder)
1106 exynos_dpi_remove(ctx->encoder);
1107}
1108
1109static const struct component_ops fimd_component_ops = {
1110 .bind = fimd_bind,
1111 .unbind = fimd_unbind,
1112};
1113
1114static int fimd_probe(struct platform_device *pdev)
1115{
1116 struct device *dev = &pdev->dev;
1117 struct fimd_context *ctx;
1118 struct device_node *i80_if_timings;
1119 struct resource *res;
1120 int ret;
1121
1122 if (!dev->of_node)
1123 return -ENODEV;
1124
1125 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1126 if (!ctx)
1127 return -ENOMEM;
1128
1129 ctx->dev = dev;
1130 ctx->suspended = true;
1131 ctx->driver_data = of_device_get_match_data(dev);
1132
1133 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1134 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1135 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1136 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1137
1138 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1139 if (i80_if_timings) {
1140 u32 val;
1141
1142 ctx->i80_if = true;
1143
1144 if (ctx->driver_data->has_vidoutcon)
1145 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1146 else
1147 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1148 /*
1149 * The user manual describes that this "DSI_EN" bit is required
1150 * to enable I80 24-bit data interface.
1151 */
1152 ctx->vidcon0 |= VIDCON0_DSI_EN;
1153
1154 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1155 val = 0;
1156 ctx->i80ifcon = LCD_CS_SETUP(val);
1157 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1158 val = 0;
1159 ctx->i80ifcon |= LCD_WR_SETUP(val);
1160 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1161 val = 1;
1162 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1163 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1164 val = 0;
1165 ctx->i80ifcon |= LCD_WR_HOLD(val);
1166 }
1167 of_node_put(i80_if_timings);
1168
1169 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1170 "samsung,sysreg");
1171 if (IS_ERR(ctx->sysreg)) {
1172 dev_warn(dev, "failed to get system register.\n");
1173 ctx->sysreg = NULL;
1174 }
1175
1176 ctx->bus_clk = devm_clk_get(dev, "fimd");
1177 if (IS_ERR(ctx->bus_clk)) {
1178 dev_err(dev, "failed to get bus clock\n");
1179 return PTR_ERR(ctx->bus_clk);
1180 }
1181
1182 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1183 if (IS_ERR(ctx->lcd_clk)) {
1184 dev_err(dev, "failed to get lcd clock\n");
1185 return PTR_ERR(ctx->lcd_clk);
1186 }
1187
1188 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1189
1190 ctx->regs = devm_ioremap_resource(dev, res);
1191 if (IS_ERR(ctx->regs))
1192 return PTR_ERR(ctx->regs);
1193
1194 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1195 ctx->i80_if ? "lcd_sys" : "vsync");
1196 if (!res) {
1197 dev_err(dev, "irq request failed.\n");
1198 return -ENXIO;
1199 }
1200
1201 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1202 0, "drm_fimd", ctx);
1203 if (ret) {
1204 dev_err(dev, "irq request failed.\n");
1205 return ret;
1206 }
1207
1208 init_waitqueue_head(&ctx->wait_vsync_queue);
1209 atomic_set(&ctx->wait_vsync_event, 0);
1210
1211 platform_set_drvdata(pdev, ctx);
1212
1213 ctx->encoder = exynos_dpi_probe(dev);
1214 if (IS_ERR(ctx->encoder))
1215 return PTR_ERR(ctx->encoder);
1216
1217 pm_runtime_enable(dev);
1218
1219 ret = component_add(dev, &fimd_component_ops);
1220 if (ret)
1221 goto err_disable_pm_runtime;
1222
1223 return ret;
1224
1225err_disable_pm_runtime:
1226 pm_runtime_disable(dev);
1227
1228 return ret;
1229}
1230
1231static int fimd_remove(struct platform_device *pdev)
1232{
1233 pm_runtime_disable(&pdev->dev);
1234
1235 component_del(&pdev->dev, &fimd_component_ops);
1236
1237 return 0;
1238}
1239
1240#ifdef CONFIG_PM
1241static int exynos_fimd_suspend(struct device *dev)
1242{
1243 struct fimd_context *ctx = dev_get_drvdata(dev);
1244
1245 clk_disable_unprepare(ctx->lcd_clk);
1246 clk_disable_unprepare(ctx->bus_clk);
1247
1248 return 0;
1249}
1250
1251static int exynos_fimd_resume(struct device *dev)
1252{
1253 struct fimd_context *ctx = dev_get_drvdata(dev);
1254 int ret;
1255
1256 ret = clk_prepare_enable(ctx->bus_clk);
1257 if (ret < 0) {
1258 DRM_DEV_ERROR(dev,
1259 "Failed to prepare_enable the bus clk [%d]\n",
1260 ret);
1261 return ret;
1262 }
1263
1264 ret = clk_prepare_enable(ctx->lcd_clk);
1265 if (ret < 0) {
1266 DRM_DEV_ERROR(dev,
1267 "Failed to prepare_enable the lcd clk [%d]\n",
1268 ret);
1269 return ret;
1270 }
1271
1272 return 0;
1273}
1274#endif
1275
1276static const struct dev_pm_ops exynos_fimd_pm_ops = {
1277 SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1278 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1279 pm_runtime_force_resume)
1280};
1281
1282struct platform_driver fimd_driver = {
1283 .probe = fimd_probe,
1284 .remove = fimd_remove,
1285 .driver = {
1286 .name = "exynos4-fb",
1287 .owner = THIS_MODULE,
1288 .pm = &exynos_fimd_pm_ops,
1289 .of_match_table = fimd_driver_dt_match,
1290 },
1291};