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_fbdev.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 FIMD_DEFAULT_FRAMERATE 60
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_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 / RGB trigger control register */
71 #define TRIGCON 0x1A4
72 #define TRGMODE_I80_RGB_ENABLE_I80 (1 << 0)
73 #define SWTRGCMD_I80_RGB_ENABLE (1 << 1)
74
75 /* display mode change control register except exynos4 */
76 #define VIDOUT_CON 0x000
77 #define VIDOUT_CON_F_I80_LDI0 (0x2 << 8)
78
79 /* I80 interface control for main LDI register */
80 #define I80IFCONFAx(x) (0x1B0 + (x) * 4)
81 #define I80IFCONFBx(x) (0x1B8 + (x) * 4)
82 #define LCD_CS_SETUP(x) ((x) << 16)
83 #define LCD_WR_SETUP(x) ((x) << 12)
84 #define LCD_WR_ACTIVE(x) ((x) << 8)
85 #define LCD_WR_HOLD(x) ((x) << 4)
86 #define I80IFEN_ENABLE (1 << 0)
87
88 /* FIMD has totally five hardware windows. */
89 #define WINDOWS_NR 5
90
91 struct fimd_driver_data {
92 unsigned int timing_base;
93 unsigned int lcdblk_offset;
94 unsigned int lcdblk_vt_shift;
95 unsigned int lcdblk_bypass_shift;
96
97 unsigned int has_shadowcon:1;
98 unsigned int has_clksel:1;
99 unsigned int has_limited_fmt:1;
100 unsigned int has_vidoutcon:1;
101 unsigned int has_vtsel:1;
102 };
103
104 static struct fimd_driver_data s3c64xx_fimd_driver_data = {
105 .timing_base = 0x0,
106 .has_clksel = 1,
107 .has_limited_fmt = 1,
108 };
109
110 static struct fimd_driver_data exynos3_fimd_driver_data = {
111 .timing_base = 0x20000,
112 .lcdblk_offset = 0x210,
113 .lcdblk_bypass_shift = 1,
114 .has_shadowcon = 1,
115 .has_vidoutcon = 1,
116 };
117
118 static struct fimd_driver_data exynos4_fimd_driver_data = {
119 .timing_base = 0x0,
120 .lcdblk_offset = 0x210,
121 .lcdblk_vt_shift = 10,
122 .lcdblk_bypass_shift = 1,
123 .has_shadowcon = 1,
124 .has_vtsel = 1,
125 };
126
127 static struct fimd_driver_data exynos4415_fimd_driver_data = {
128 .timing_base = 0x20000,
129 .lcdblk_offset = 0x210,
130 .lcdblk_vt_shift = 10,
131 .lcdblk_bypass_shift = 1,
132 .has_shadowcon = 1,
133 .has_vidoutcon = 1,
134 .has_vtsel = 1,
135 };
136
137 static struct fimd_driver_data exynos5_fimd_driver_data = {
138 .timing_base = 0x20000,
139 .lcdblk_offset = 0x214,
140 .lcdblk_vt_shift = 24,
141 .lcdblk_bypass_shift = 15,
142 .has_shadowcon = 1,
143 .has_vidoutcon = 1,
144 .has_vtsel = 1,
145 };
146
147 struct fimd_context {
148 struct device *dev;
149 struct drm_device *drm_dev;
150 struct exynos_drm_crtc *crtc;
151 struct exynos_drm_plane planes[WINDOWS_NR];
152 struct clk *bus_clk;
153 struct clk *lcd_clk;
154 void __iomem *regs;
155 struct regmap *sysreg;
156 unsigned int default_win;
157 unsigned long irq_flags;
158 u32 vidcon0;
159 u32 vidcon1;
160 u32 vidout_con;
161 u32 i80ifcon;
162 bool i80_if;
163 bool suspended;
164 int pipe;
165 wait_queue_head_t wait_vsync_queue;
166 atomic_t wait_vsync_event;
167 atomic_t win_updated;
168 atomic_t triggering;
169
170 struct exynos_drm_panel_info panel;
171 struct fimd_driver_data *driver_data;
172 struct exynos_drm_display *display;
173 };
174
175 static const struct of_device_id fimd_driver_dt_match[] = {
176 { .compatible = "samsung,s3c6400-fimd",
177 .data = &s3c64xx_fimd_driver_data },
178 { .compatible = "samsung,exynos3250-fimd",
179 .data = &exynos3_fimd_driver_data },
180 { .compatible = "samsung,exynos4210-fimd",
181 .data = &exynos4_fimd_driver_data },
182 { .compatible = "samsung,exynos4415-fimd",
183 .data = &exynos4415_fimd_driver_data },
184 { .compatible = "samsung,exynos5250-fimd",
185 .data = &exynos5_fimd_driver_data },
186 {},
187 };
188 MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
189
drm_fimd_get_driver_data(struct platform_device * pdev)190 static inline struct fimd_driver_data *drm_fimd_get_driver_data(
191 struct platform_device *pdev)
192 {
193 const struct of_device_id *of_id =
194 of_match_device(fimd_driver_dt_match, &pdev->dev);
195
196 return (struct fimd_driver_data *)of_id->data;
197 }
198
fimd_wait_for_vblank(struct exynos_drm_crtc * crtc)199 static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
200 {
201 struct fimd_context *ctx = crtc->ctx;
202
203 if (ctx->suspended)
204 return;
205
206 atomic_set(&ctx->wait_vsync_event, 1);
207
208 /*
209 * wait for FIMD to signal VSYNC interrupt or return after
210 * timeout which is set to 50ms (refresh rate of 20).
211 */
212 if (!wait_event_timeout(ctx->wait_vsync_queue,
213 !atomic_read(&ctx->wait_vsync_event),
214 HZ/20))
215 DRM_DEBUG_KMS("vblank wait timed out.\n");
216 }
217
fimd_enable_video_output(struct fimd_context * ctx,unsigned int win,bool enable)218 static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
219 bool enable)
220 {
221 u32 val = readl(ctx->regs + WINCON(win));
222
223 if (enable)
224 val |= WINCONx_ENWIN;
225 else
226 val &= ~WINCONx_ENWIN;
227
228 writel(val, ctx->regs + WINCON(win));
229 }
230
fimd_enable_shadow_channel_path(struct fimd_context * ctx,unsigned int win,bool enable)231 static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
232 unsigned int win,
233 bool enable)
234 {
235 u32 val = readl(ctx->regs + SHADOWCON);
236
237 if (enable)
238 val |= SHADOWCON_CHx_ENABLE(win);
239 else
240 val &= ~SHADOWCON_CHx_ENABLE(win);
241
242 writel(val, ctx->regs + SHADOWCON);
243 }
244
fimd_clear_channel(struct fimd_context * ctx)245 static void fimd_clear_channel(struct fimd_context *ctx)
246 {
247 unsigned int win, ch_enabled = 0;
248
249 DRM_DEBUG_KMS("%s\n", __FILE__);
250
251 /* Check if any channel is enabled. */
252 for (win = 0; win < WINDOWS_NR; win++) {
253 u32 val = readl(ctx->regs + WINCON(win));
254
255 if (val & WINCONx_ENWIN) {
256 fimd_enable_video_output(ctx, win, false);
257
258 if (ctx->driver_data->has_shadowcon)
259 fimd_enable_shadow_channel_path(ctx, win,
260 false);
261
262 ch_enabled = 1;
263 }
264 }
265
266 /* Wait for vsync, as disable channel takes effect at next vsync */
267 if (ch_enabled) {
268 unsigned int state = ctx->suspended;
269
270 ctx->suspended = 0;
271 fimd_wait_for_vblank(ctx->crtc);
272 ctx->suspended = state;
273 }
274 }
275
fimd_iommu_attach_devices(struct fimd_context * ctx,struct drm_device * drm_dev)276 static int fimd_iommu_attach_devices(struct fimd_context *ctx,
277 struct drm_device *drm_dev)
278 {
279
280 /* attach this sub driver to iommu mapping if supported. */
281 if (is_drm_iommu_supported(ctx->drm_dev)) {
282 int ret;
283
284 /*
285 * If any channel is already active, iommu will throw
286 * a PAGE FAULT when enabled. So clear any channel if enabled.
287 */
288 fimd_clear_channel(ctx);
289 ret = drm_iommu_attach_device(ctx->drm_dev, ctx->dev);
290 if (ret) {
291 DRM_ERROR("drm_iommu_attach failed.\n");
292 return ret;
293 }
294
295 }
296
297 return 0;
298 }
299
fimd_iommu_detach_devices(struct fimd_context * ctx)300 static void fimd_iommu_detach_devices(struct fimd_context *ctx)
301 {
302 /* detach this sub driver from iommu mapping if supported. */
303 if (is_drm_iommu_supported(ctx->drm_dev))
304 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
305 }
306
fimd_calc_clkdiv(struct fimd_context * ctx,const struct drm_display_mode * mode)307 static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
308 const struct drm_display_mode *mode)
309 {
310 unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
311 u32 clkdiv;
312
313 if (ctx->i80_if) {
314 /*
315 * The frame done interrupt should be occurred prior to the
316 * next TE signal.
317 */
318 ideal_clk *= 2;
319 }
320
321 /* Find the clock divider value that gets us closest to ideal_clk */
322 clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->lcd_clk), ideal_clk);
323
324 return (clkdiv < 0x100) ? clkdiv : 0xff;
325 }
326
fimd_mode_fixup(struct exynos_drm_crtc * crtc,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)327 static bool fimd_mode_fixup(struct exynos_drm_crtc *crtc,
328 const struct drm_display_mode *mode,
329 struct drm_display_mode *adjusted_mode)
330 {
331 if (adjusted_mode->vrefresh == 0)
332 adjusted_mode->vrefresh = FIMD_DEFAULT_FRAMERATE;
333
334 return true;
335 }
336
fimd_commit(struct exynos_drm_crtc * crtc)337 static void fimd_commit(struct exynos_drm_crtc *crtc)
338 {
339 struct fimd_context *ctx = crtc->ctx;
340 struct drm_display_mode *mode = &crtc->base.mode;
341 struct fimd_driver_data *driver_data = ctx->driver_data;
342 void *timing_base = ctx->regs + driver_data->timing_base;
343 u32 val, clkdiv;
344
345 if (ctx->suspended)
346 return;
347
348 /* nothing to do if we haven't set the mode yet */
349 if (mode->htotal == 0 || mode->vtotal == 0)
350 return;
351
352 if (ctx->i80_if) {
353 val = ctx->i80ifcon | I80IFEN_ENABLE;
354 writel(val, timing_base + I80IFCONFAx(0));
355
356 /* disable auto frame rate */
357 writel(0, timing_base + I80IFCONFBx(0));
358
359 /* set video type selection to I80 interface */
360 if (driver_data->has_vtsel && ctx->sysreg &&
361 regmap_update_bits(ctx->sysreg,
362 driver_data->lcdblk_offset,
363 0x3 << driver_data->lcdblk_vt_shift,
364 0x1 << driver_data->lcdblk_vt_shift)) {
365 DRM_ERROR("Failed to update sysreg for I80 i/f.\n");
366 return;
367 }
368 } else {
369 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
370 u32 vidcon1;
371
372 /* setup polarity values */
373 vidcon1 = ctx->vidcon1;
374 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
375 vidcon1 |= VIDCON1_INV_VSYNC;
376 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
377 vidcon1 |= VIDCON1_INV_HSYNC;
378 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
379
380 /* setup vertical timing values. */
381 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
382 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
383 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
384
385 val = VIDTCON0_VBPD(vbpd - 1) |
386 VIDTCON0_VFPD(vfpd - 1) |
387 VIDTCON0_VSPW(vsync_len - 1);
388 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
389
390 /* setup horizontal timing values. */
391 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
392 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
393 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
394
395 val = VIDTCON1_HBPD(hbpd - 1) |
396 VIDTCON1_HFPD(hfpd - 1) |
397 VIDTCON1_HSPW(hsync_len - 1);
398 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
399 }
400
401 if (driver_data->has_vidoutcon)
402 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
403
404 /* set bypass selection */
405 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
406 driver_data->lcdblk_offset,
407 0x1 << driver_data->lcdblk_bypass_shift,
408 0x1 << driver_data->lcdblk_bypass_shift)) {
409 DRM_ERROR("Failed to update sysreg for bypass setting.\n");
410 return;
411 }
412
413 /* setup horizontal and vertical display size. */
414 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
415 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
416 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
417 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
418 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
419
420 /*
421 * fields of register with prefix '_F' would be updated
422 * at vsync(same as dma start)
423 */
424 val = ctx->vidcon0;
425 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
426
427 if (ctx->driver_data->has_clksel)
428 val |= VIDCON0_CLKSEL_LCD;
429
430 clkdiv = fimd_calc_clkdiv(ctx, mode);
431 if (clkdiv > 1)
432 val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
433
434 writel(val, ctx->regs + VIDCON0);
435 }
436
fimd_enable_vblank(struct exynos_drm_crtc * crtc)437 static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
438 {
439 struct fimd_context *ctx = crtc->ctx;
440 u32 val;
441
442 if (ctx->suspended)
443 return -EPERM;
444
445 if (!test_and_set_bit(0, &ctx->irq_flags)) {
446 val = readl(ctx->regs + VIDINTCON0);
447
448 val |= VIDINTCON0_INT_ENABLE;
449
450 if (ctx->i80_if) {
451 val |= VIDINTCON0_INT_I80IFDONE;
452 val |= VIDINTCON0_INT_SYSMAINCON;
453 val &= ~VIDINTCON0_INT_SYSSUBCON;
454 } else {
455 val |= VIDINTCON0_INT_FRAME;
456
457 val &= ~VIDINTCON0_FRAMESEL0_MASK;
458 val |= VIDINTCON0_FRAMESEL0_VSYNC;
459 val &= ~VIDINTCON0_FRAMESEL1_MASK;
460 val |= VIDINTCON0_FRAMESEL1_NONE;
461 }
462
463 writel(val, ctx->regs + VIDINTCON0);
464 }
465
466 return 0;
467 }
468
fimd_disable_vblank(struct exynos_drm_crtc * crtc)469 static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
470 {
471 struct fimd_context *ctx = crtc->ctx;
472 u32 val;
473
474 if (ctx->suspended)
475 return;
476
477 if (test_and_clear_bit(0, &ctx->irq_flags)) {
478 val = readl(ctx->regs + VIDINTCON0);
479
480 val &= ~VIDINTCON0_INT_ENABLE;
481
482 if (ctx->i80_if) {
483 val &= ~VIDINTCON0_INT_I80IFDONE;
484 val &= ~VIDINTCON0_INT_SYSMAINCON;
485 val &= ~VIDINTCON0_INT_SYSSUBCON;
486 } else
487 val &= ~VIDINTCON0_INT_FRAME;
488
489 writel(val, ctx->regs + VIDINTCON0);
490 }
491 }
492
fimd_win_set_pixfmt(struct fimd_context * ctx,unsigned int win)493 static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win)
494 {
495 struct exynos_drm_plane *plane = &ctx->planes[win];
496 unsigned long val;
497
498 val = WINCONx_ENWIN;
499
500 /*
501 * In case of s3c64xx, window 0 doesn't support alpha channel.
502 * So the request format is ARGB8888 then change it to XRGB8888.
503 */
504 if (ctx->driver_data->has_limited_fmt && !win) {
505 if (plane->pixel_format == DRM_FORMAT_ARGB8888)
506 plane->pixel_format = DRM_FORMAT_XRGB8888;
507 }
508
509 switch (plane->pixel_format) {
510 case DRM_FORMAT_C8:
511 val |= WINCON0_BPPMODE_8BPP_PALETTE;
512 val |= WINCONx_BURSTLEN_8WORD;
513 val |= WINCONx_BYTSWP;
514 break;
515 case DRM_FORMAT_XRGB1555:
516 val |= WINCON0_BPPMODE_16BPP_1555;
517 val |= WINCONx_HAWSWP;
518 val |= WINCONx_BURSTLEN_16WORD;
519 break;
520 case DRM_FORMAT_RGB565:
521 val |= WINCON0_BPPMODE_16BPP_565;
522 val |= WINCONx_HAWSWP;
523 val |= WINCONx_BURSTLEN_16WORD;
524 break;
525 case DRM_FORMAT_XRGB8888:
526 val |= WINCON0_BPPMODE_24BPP_888;
527 val |= WINCONx_WSWP;
528 val |= WINCONx_BURSTLEN_16WORD;
529 break;
530 case DRM_FORMAT_ARGB8888:
531 val |= WINCON1_BPPMODE_25BPP_A1888
532 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
533 val |= WINCONx_WSWP;
534 val |= WINCONx_BURSTLEN_16WORD;
535 break;
536 default:
537 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
538
539 val |= WINCON0_BPPMODE_24BPP_888;
540 val |= WINCONx_WSWP;
541 val |= WINCONx_BURSTLEN_16WORD;
542 break;
543 }
544
545 DRM_DEBUG_KMS("bpp = %d\n", plane->bpp);
546
547 /*
548 * In case of exynos, setting dma-burst to 16Word causes permanent
549 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
550 * switching which is based on plane size is not recommended as
551 * plane size varies alot towards the end of the screen and rapid
552 * movement causes unstable DMA which results into iommu crash/tear.
553 */
554
555 if (plane->fb_width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
556 val &= ~WINCONx_BURSTLEN_MASK;
557 val |= WINCONx_BURSTLEN_4WORD;
558 }
559
560 writel(val, ctx->regs + WINCON(win));
561
562 /* hardware window 0 doesn't support alpha channel. */
563 if (win != 0) {
564 /* OSD alpha */
565 val = VIDISD14C_ALPHA0_R(0xf) |
566 VIDISD14C_ALPHA0_G(0xf) |
567 VIDISD14C_ALPHA0_B(0xf) |
568 VIDISD14C_ALPHA1_R(0xf) |
569 VIDISD14C_ALPHA1_G(0xf) |
570 VIDISD14C_ALPHA1_B(0xf);
571
572 writel(val, ctx->regs + VIDOSD_C(win));
573
574 val = VIDW_ALPHA_R(0xf) | VIDW_ALPHA_G(0xf) |
575 VIDW_ALPHA_G(0xf);
576 writel(val, ctx->regs + VIDWnALPHA0(win));
577 writel(val, ctx->regs + VIDWnALPHA1(win));
578 }
579 }
580
fimd_win_set_colkey(struct fimd_context * ctx,unsigned int win)581 static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
582 {
583 unsigned int keycon0 = 0, keycon1 = 0;
584
585 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
586 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
587
588 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
589
590 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
591 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
592 }
593
594 /**
595 * shadow_protect_win() - disable updating values from shadow registers at vsync
596 *
597 * @win: window to protect registers for
598 * @protect: 1 to protect (disable updates)
599 */
fimd_shadow_protect_win(struct fimd_context * ctx,unsigned int win,bool protect)600 static void fimd_shadow_protect_win(struct fimd_context *ctx,
601 unsigned int win, bool protect)
602 {
603 u32 reg, bits, val;
604
605 if (ctx->driver_data->has_shadowcon) {
606 reg = SHADOWCON;
607 bits = SHADOWCON_WINx_PROTECT(win);
608 } else {
609 reg = PRTCON;
610 bits = PRTCON_PROTECT;
611 }
612
613 val = readl(ctx->regs + reg);
614 if (protect)
615 val |= bits;
616 else
617 val &= ~bits;
618 writel(val, ctx->regs + reg);
619 }
620
fimd_win_commit(struct exynos_drm_crtc * crtc,unsigned int win)621 static void fimd_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
622 {
623 struct fimd_context *ctx = crtc->ctx;
624 struct exynos_drm_plane *plane;
625 dma_addr_t dma_addr;
626 unsigned long val, size, offset;
627 unsigned int last_x, last_y, buf_offsize, line_size;
628
629 if (ctx->suspended)
630 return;
631
632 if (win < 0 || win >= WINDOWS_NR)
633 return;
634
635 plane = &ctx->planes[win];
636
637 /* If suspended, enable this on resume */
638 if (ctx->suspended) {
639 plane->resume = true;
640 return;
641 }
642
643 /*
644 * SHADOWCON/PRTCON register is used for enabling timing.
645 *
646 * for example, once only width value of a register is set,
647 * if the dma is started then fimd hardware could malfunction so
648 * with protect window setting, the register fields with prefix '_F'
649 * wouldn't be updated at vsync also but updated once unprotect window
650 * is set.
651 */
652
653 /* protect windows */
654 fimd_shadow_protect_win(ctx, win, true);
655
656
657 offset = plane->src_x * (plane->bpp >> 3);
658 offset += plane->src_y * plane->pitch;
659
660 /* buffer start address */
661 dma_addr = plane->dma_addr[0] + offset;
662 val = (unsigned long)dma_addr;
663 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
664
665 /* buffer end address */
666 size = plane->pitch * plane->crtc_height;
667 val = (unsigned long)(dma_addr + size);
668 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
669
670 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
671 (unsigned long)dma_addr, val, size);
672 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
673 plane->crtc_width, plane->crtc_height);
674
675 /* buffer size */
676 buf_offsize = plane->pitch - (plane->crtc_width * (plane->bpp >> 3));
677 line_size = plane->crtc_width * (plane->bpp >> 3);
678 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
679 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
680 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
681 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
682 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
683
684 /* OSD position */
685 val = VIDOSDxA_TOPLEFT_X(plane->crtc_x) |
686 VIDOSDxA_TOPLEFT_Y(plane->crtc_y) |
687 VIDOSDxA_TOPLEFT_X_E(plane->crtc_x) |
688 VIDOSDxA_TOPLEFT_Y_E(plane->crtc_y);
689 writel(val, ctx->regs + VIDOSD_A(win));
690
691 last_x = plane->crtc_x + plane->crtc_width;
692 if (last_x)
693 last_x--;
694 last_y = plane->crtc_y + plane->crtc_height;
695 if (last_y)
696 last_y--;
697
698 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
699 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
700
701 writel(val, ctx->regs + VIDOSD_B(win));
702
703 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
704 plane->crtc_x, plane->crtc_y, last_x, last_y);
705
706 /* OSD size */
707 if (win != 3 && win != 4) {
708 u32 offset = VIDOSD_D(win);
709 if (win == 0)
710 offset = VIDOSD_C(win);
711 val = plane->crtc_width * plane->crtc_height;
712 writel(val, ctx->regs + offset);
713
714 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
715 }
716
717 fimd_win_set_pixfmt(ctx, win);
718
719 /* hardware window 0 doesn't support color key. */
720 if (win != 0)
721 fimd_win_set_colkey(ctx, win);
722
723 fimd_enable_video_output(ctx, win, true);
724
725 if (ctx->driver_data->has_shadowcon)
726 fimd_enable_shadow_channel_path(ctx, win, true);
727
728 /* Enable DMA channel and unprotect windows */
729 fimd_shadow_protect_win(ctx, win, false);
730
731 plane->enabled = true;
732
733 if (ctx->i80_if)
734 atomic_set(&ctx->win_updated, 1);
735 }
736
fimd_win_disable(struct exynos_drm_crtc * crtc,unsigned int win)737 static void fimd_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
738 {
739 struct fimd_context *ctx = crtc->ctx;
740 struct exynos_drm_plane *plane;
741
742 if (win < 0 || win >= WINDOWS_NR)
743 return;
744
745 plane = &ctx->planes[win];
746
747 if (ctx->suspended) {
748 /* do not resume this window*/
749 plane->resume = false;
750 return;
751 }
752
753 /* protect windows */
754 fimd_shadow_protect_win(ctx, win, true);
755
756 fimd_enable_video_output(ctx, win, false);
757
758 if (ctx->driver_data->has_shadowcon)
759 fimd_enable_shadow_channel_path(ctx, win, false);
760
761 /* unprotect windows */
762 fimd_shadow_protect_win(ctx, win, false);
763
764 plane->enabled = false;
765 }
766
fimd_window_suspend(struct fimd_context * ctx)767 static void fimd_window_suspend(struct fimd_context *ctx)
768 {
769 struct exynos_drm_plane *plane;
770 int i;
771
772 for (i = 0; i < WINDOWS_NR; i++) {
773 plane = &ctx->planes[i];
774 plane->resume = plane->enabled;
775 if (plane->enabled)
776 fimd_win_disable(ctx->crtc, i);
777 }
778 }
779
fimd_window_resume(struct fimd_context * ctx)780 static void fimd_window_resume(struct fimd_context *ctx)
781 {
782 struct exynos_drm_plane *plane;
783 int i;
784
785 for (i = 0; i < WINDOWS_NR; i++) {
786 plane = &ctx->planes[i];
787 plane->enabled = plane->resume;
788 plane->resume = false;
789 }
790 }
791
fimd_apply(struct fimd_context * ctx)792 static void fimd_apply(struct fimd_context *ctx)
793 {
794 struct exynos_drm_plane *plane;
795 int i;
796
797 for (i = 0; i < WINDOWS_NR; i++) {
798 plane = &ctx->planes[i];
799 if (plane->enabled)
800 fimd_win_commit(ctx->crtc, i);
801 else
802 fimd_win_disable(ctx->crtc, i);
803 }
804
805 fimd_commit(ctx->crtc);
806 }
807
fimd_poweron(struct fimd_context * ctx)808 static int fimd_poweron(struct fimd_context *ctx)
809 {
810 int ret;
811
812 if (!ctx->suspended)
813 return 0;
814
815 ctx->suspended = false;
816
817 pm_runtime_get_sync(ctx->dev);
818
819 ret = clk_prepare_enable(ctx->bus_clk);
820 if (ret < 0) {
821 DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
822 goto bus_clk_err;
823 }
824
825 ret = clk_prepare_enable(ctx->lcd_clk);
826 if (ret < 0) {
827 DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
828 goto lcd_clk_err;
829 }
830
831 /* if vblank was enabled status, enable it again. */
832 if (test_and_clear_bit(0, &ctx->irq_flags)) {
833 ret = fimd_enable_vblank(ctx->crtc);
834 if (ret) {
835 DRM_ERROR("Failed to re-enable vblank [%d]\n", ret);
836 goto enable_vblank_err;
837 }
838 }
839
840 fimd_window_resume(ctx);
841
842 fimd_apply(ctx);
843
844 return 0;
845
846 enable_vblank_err:
847 clk_disable_unprepare(ctx->lcd_clk);
848 lcd_clk_err:
849 clk_disable_unprepare(ctx->bus_clk);
850 bus_clk_err:
851 ctx->suspended = true;
852 return ret;
853 }
854
fimd_poweroff(struct fimd_context * ctx)855 static int fimd_poweroff(struct fimd_context *ctx)
856 {
857 if (ctx->suspended)
858 return 0;
859
860 /*
861 * We need to make sure that all windows are disabled before we
862 * suspend that connector. Otherwise we might try to scan from
863 * a destroyed buffer later.
864 */
865 fimd_window_suspend(ctx);
866
867 clk_disable_unprepare(ctx->lcd_clk);
868 clk_disable_unprepare(ctx->bus_clk);
869
870 pm_runtime_put_sync(ctx->dev);
871
872 ctx->suspended = true;
873 return 0;
874 }
875
fimd_dpms(struct exynos_drm_crtc * crtc,int mode)876 static void fimd_dpms(struct exynos_drm_crtc *crtc, int mode)
877 {
878 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
879
880 switch (mode) {
881 case DRM_MODE_DPMS_ON:
882 fimd_poweron(crtc->ctx);
883 break;
884 case DRM_MODE_DPMS_STANDBY:
885 case DRM_MODE_DPMS_SUSPEND:
886 case DRM_MODE_DPMS_OFF:
887 fimd_poweroff(crtc->ctx);
888 break;
889 default:
890 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
891 break;
892 }
893 }
894
fimd_trigger(struct device * dev)895 static void fimd_trigger(struct device *dev)
896 {
897 struct fimd_context *ctx = dev_get_drvdata(dev);
898 struct fimd_driver_data *driver_data = ctx->driver_data;
899 void *timing_base = ctx->regs + driver_data->timing_base;
900 u32 reg;
901
902 /*
903 * Skips triggering if in triggering state, because multiple triggering
904 * requests can cause panel reset.
905 */
906 if (atomic_read(&ctx->triggering))
907 return;
908
909 /* Enters triggering mode */
910 atomic_set(&ctx->triggering, 1);
911
912 reg = readl(timing_base + TRIGCON);
913 reg |= (TRGMODE_I80_RGB_ENABLE_I80 | SWTRGCMD_I80_RGB_ENABLE);
914 writel(reg, timing_base + TRIGCON);
915
916 /*
917 * Exits triggering mode if vblank is not enabled yet, because when the
918 * VIDINTCON0 register is not set, it can not exit from triggering mode.
919 */
920 if (!test_bit(0, &ctx->irq_flags))
921 atomic_set(&ctx->triggering, 0);
922 }
923
fimd_te_handler(struct exynos_drm_crtc * crtc)924 static void fimd_te_handler(struct exynos_drm_crtc *crtc)
925 {
926 struct fimd_context *ctx = crtc->ctx;
927
928 /* Checks the crtc is detached already from encoder */
929 if (ctx->pipe < 0 || !ctx->drm_dev)
930 return;
931
932 /*
933 * If there is a page flip request, triggers and handles the page flip
934 * event so that current fb can be updated into panel GRAM.
935 */
936 if (atomic_add_unless(&ctx->win_updated, -1, 0))
937 fimd_trigger(ctx->dev);
938
939 /* Wakes up vsync event queue */
940 if (atomic_read(&ctx->wait_vsync_event)) {
941 atomic_set(&ctx->wait_vsync_event, 0);
942 wake_up(&ctx->wait_vsync_queue);
943 }
944
945 if (test_bit(0, &ctx->irq_flags))
946 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
947 }
948
fimd_dp_clock_enable(struct exynos_drm_crtc * crtc,bool enable)949 static void fimd_dp_clock_enable(struct exynos_drm_crtc *crtc, bool enable)
950 {
951 struct fimd_context *ctx = crtc->ctx;
952 u32 val;
953
954 /*
955 * Only Exynos 5250, 5260, 5410 and 542x requires enabling DP/MIE
956 * clock. On these SoCs the bootloader may enable it but any
957 * power domain off/on will reset it to disable state.
958 */
959 if (ctx->driver_data != &exynos5_fimd_driver_data)
960 return;
961
962 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
963 writel(DP_MIE_CLK_DP_ENABLE, ctx->regs + DP_MIE_CLKCON);
964 }
965
966 static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
967 .dpms = fimd_dpms,
968 .mode_fixup = fimd_mode_fixup,
969 .commit = fimd_commit,
970 .enable_vblank = fimd_enable_vblank,
971 .disable_vblank = fimd_disable_vblank,
972 .wait_for_vblank = fimd_wait_for_vblank,
973 .win_commit = fimd_win_commit,
974 .win_disable = fimd_win_disable,
975 .te_handler = fimd_te_handler,
976 .clock_enable = fimd_dp_clock_enable,
977 };
978
fimd_irq_handler(int irq,void * dev_id)979 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
980 {
981 struct fimd_context *ctx = (struct fimd_context *)dev_id;
982 u32 val, clear_bit;
983
984 val = readl(ctx->regs + VIDINTCON1);
985
986 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
987 if (val & clear_bit)
988 writel(clear_bit, ctx->regs + VIDINTCON1);
989
990 /* check the crtc is detached already from encoder */
991 if (ctx->pipe < 0 || !ctx->drm_dev)
992 goto out;
993
994 if (ctx->i80_if) {
995 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
996
997 /* Exits triggering mode */
998 atomic_set(&ctx->triggering, 0);
999 } else {
1000 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
1001 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
1002
1003 /* set wait vsync event to zero and wake up queue. */
1004 if (atomic_read(&ctx->wait_vsync_event)) {
1005 atomic_set(&ctx->wait_vsync_event, 0);
1006 wake_up(&ctx->wait_vsync_queue);
1007 }
1008 }
1009
1010 out:
1011 return IRQ_HANDLED;
1012 }
1013
fimd_bind(struct device * dev,struct device * master,void * data)1014 static int fimd_bind(struct device *dev, struct device *master, void *data)
1015 {
1016 struct fimd_context *ctx = dev_get_drvdata(dev);
1017 struct drm_device *drm_dev = data;
1018 struct exynos_drm_private *priv = drm_dev->dev_private;
1019 struct exynos_drm_plane *exynos_plane;
1020 enum drm_plane_type type;
1021 unsigned int zpos;
1022 int ret;
1023
1024 ctx->drm_dev = drm_dev;
1025 ctx->pipe = priv->pipe++;
1026
1027 for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
1028 type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
1029 DRM_PLANE_TYPE_OVERLAY;
1030 ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
1031 1 << ctx->pipe, type, zpos);
1032 if (ret)
1033 return ret;
1034 }
1035
1036 exynos_plane = &ctx->planes[ctx->default_win];
1037 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
1038 ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
1039 &fimd_crtc_ops, ctx);
1040 if (IS_ERR(ctx->crtc))
1041 return PTR_ERR(ctx->crtc);
1042
1043 if (ctx->display)
1044 exynos_drm_create_enc_conn(drm_dev, ctx->display);
1045
1046 return fimd_iommu_attach_devices(ctx, drm_dev);
1047 }
1048
fimd_unbind(struct device * dev,struct device * master,void * data)1049 static void fimd_unbind(struct device *dev, struct device *master,
1050 void *data)
1051 {
1052 struct fimd_context *ctx = dev_get_drvdata(dev);
1053
1054 fimd_dpms(ctx->crtc, DRM_MODE_DPMS_OFF);
1055
1056 fimd_iommu_detach_devices(ctx);
1057
1058 if (ctx->display)
1059 exynos_dpi_remove(ctx->display);
1060 }
1061
1062 static const struct component_ops fimd_component_ops = {
1063 .bind = fimd_bind,
1064 .unbind = fimd_unbind,
1065 };
1066
fimd_probe(struct platform_device * pdev)1067 static int fimd_probe(struct platform_device *pdev)
1068 {
1069 struct device *dev = &pdev->dev;
1070 struct fimd_context *ctx;
1071 struct device_node *i80_if_timings;
1072 struct resource *res;
1073 int ret;
1074
1075 if (!dev->of_node)
1076 return -ENODEV;
1077
1078 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1079 if (!ctx)
1080 return -ENOMEM;
1081
1082 ret = exynos_drm_component_add(dev, EXYNOS_DEVICE_TYPE_CRTC,
1083 EXYNOS_DISPLAY_TYPE_LCD);
1084 if (ret)
1085 return ret;
1086
1087 ctx->dev = dev;
1088 ctx->suspended = true;
1089 ctx->driver_data = drm_fimd_get_driver_data(pdev);
1090
1091 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1092 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1093 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1094 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1095
1096 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1097 if (i80_if_timings) {
1098 u32 val;
1099
1100 ctx->i80_if = true;
1101
1102 if (ctx->driver_data->has_vidoutcon)
1103 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1104 else
1105 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1106 /*
1107 * The user manual describes that this "DSI_EN" bit is required
1108 * to enable I80 24-bit data interface.
1109 */
1110 ctx->vidcon0 |= VIDCON0_DSI_EN;
1111
1112 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1113 val = 0;
1114 ctx->i80ifcon = LCD_CS_SETUP(val);
1115 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1116 val = 0;
1117 ctx->i80ifcon |= LCD_WR_SETUP(val);
1118 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1119 val = 1;
1120 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1121 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1122 val = 0;
1123 ctx->i80ifcon |= LCD_WR_HOLD(val);
1124 }
1125 of_node_put(i80_if_timings);
1126
1127 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1128 "samsung,sysreg");
1129 if (IS_ERR(ctx->sysreg)) {
1130 dev_warn(dev, "failed to get system register.\n");
1131 ctx->sysreg = NULL;
1132 }
1133
1134 ctx->bus_clk = devm_clk_get(dev, "fimd");
1135 if (IS_ERR(ctx->bus_clk)) {
1136 dev_err(dev, "failed to get bus clock\n");
1137 ret = PTR_ERR(ctx->bus_clk);
1138 goto err_del_component;
1139 }
1140
1141 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1142 if (IS_ERR(ctx->lcd_clk)) {
1143 dev_err(dev, "failed to get lcd clock\n");
1144 ret = PTR_ERR(ctx->lcd_clk);
1145 goto err_del_component;
1146 }
1147
1148 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1149
1150 ctx->regs = devm_ioremap_resource(dev, res);
1151 if (IS_ERR(ctx->regs)) {
1152 ret = PTR_ERR(ctx->regs);
1153 goto err_del_component;
1154 }
1155
1156 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1157 ctx->i80_if ? "lcd_sys" : "vsync");
1158 if (!res) {
1159 dev_err(dev, "irq request failed.\n");
1160 ret = -ENXIO;
1161 goto err_del_component;
1162 }
1163
1164 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1165 0, "drm_fimd", ctx);
1166 if (ret) {
1167 dev_err(dev, "irq request failed.\n");
1168 goto err_del_component;
1169 }
1170
1171 init_waitqueue_head(&ctx->wait_vsync_queue);
1172 atomic_set(&ctx->wait_vsync_event, 0);
1173
1174 platform_set_drvdata(pdev, ctx);
1175
1176 ctx->display = exynos_dpi_probe(dev);
1177 if (IS_ERR(ctx->display)) {
1178 ret = PTR_ERR(ctx->display);
1179 goto err_del_component;
1180 }
1181
1182 pm_runtime_enable(dev);
1183
1184 ret = component_add(dev, &fimd_component_ops);
1185 if (ret)
1186 goto err_disable_pm_runtime;
1187
1188 return ret;
1189
1190 err_disable_pm_runtime:
1191 pm_runtime_disable(dev);
1192
1193 err_del_component:
1194 exynos_drm_component_del(dev, EXYNOS_DEVICE_TYPE_CRTC);
1195 return ret;
1196 }
1197
fimd_remove(struct platform_device * pdev)1198 static int fimd_remove(struct platform_device *pdev)
1199 {
1200 pm_runtime_disable(&pdev->dev);
1201
1202 component_del(&pdev->dev, &fimd_component_ops);
1203 exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
1204
1205 return 0;
1206 }
1207
1208 struct platform_driver fimd_driver = {
1209 .probe = fimd_probe,
1210 .remove = fimd_remove,
1211 .driver = {
1212 .name = "exynos4-fb",
1213 .owner = THIS_MODULE,
1214 .of_match_table = fimd_driver_dt_match,
1215 },
1216 };
1217