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drm/exynos: fimd: remove unused variable
[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / exynos / exynos_drm_fimd.c
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
23 #include <video/of_display_timing.h>
24 #include <video/of_videomode.h>
25 #include <video/samsung_fimd.h>
26 #include <drm/exynos_drm.h>
27
28 #include "exynos_drm_drv.h"
29 #include "exynos_drm_fbdev.h"
30 #include "exynos_drm_crtc.h"
31 #include "exynos_drm_iommu.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 FIMD_DEFAULT_FRAMERATE 60
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 VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8)
54 #define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8)
55 #define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4)
56
57 /* color key control register for hardware window 1 ~ 4. */
58 #define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + ((x - 1) * 8))
59 /* color key value register for hardware window 1 ~ 4. */
60 #define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + ((x - 1) * 8))
61
62 /* FIMD has totally five hardware windows. */
63 #define WINDOWS_NR 5
64
65 #define get_fimd_manager(mgr) platform_get_drvdata(to_platform_device(dev))
66
67 struct fimd_driver_data {
68 unsigned int timing_base;
69
70 unsigned int has_shadowcon:1;
71 unsigned int has_clksel:1;
72 unsigned int has_limited_fmt:1;
73 };
74
75 static struct fimd_driver_data s3c64xx_fimd_driver_data = {
76 .timing_base = 0x0,
77 .has_clksel = 1,
78 .has_limited_fmt = 1,
79 };
80
81 static struct fimd_driver_data exynos4_fimd_driver_data = {
82 .timing_base = 0x0,
83 .has_shadowcon = 1,
84 };
85
86 static struct fimd_driver_data exynos5_fimd_driver_data = {
87 .timing_base = 0x20000,
88 .has_shadowcon = 1,
89 };
90
91 struct fimd_win_data {
92 unsigned int offset_x;
93 unsigned int offset_y;
94 unsigned int ovl_width;
95 unsigned int ovl_height;
96 unsigned int fb_width;
97 unsigned int fb_height;
98 unsigned int bpp;
99 unsigned int pixel_format;
100 dma_addr_t dma_addr;
101 unsigned int buf_offsize;
102 unsigned int line_size; /* bytes */
103 bool enabled;
104 bool resume;
105 };
106
107 struct fimd_context {
108 struct device *dev;
109 struct drm_device *drm_dev;
110 struct clk *bus_clk;
111 struct clk *lcd_clk;
112 void __iomem *regs;
113 struct drm_display_mode mode;
114 struct fimd_win_data win_data[WINDOWS_NR];
115 unsigned int default_win;
116 unsigned long irq_flags;
117 u32 vidcon1;
118 bool suspended;
119 int pipe;
120 wait_queue_head_t wait_vsync_queue;
121 atomic_t wait_vsync_event;
122
123 struct exynos_drm_panel_info panel;
124 struct fimd_driver_data *driver_data;
125 };
126
127 static const struct of_device_id fimd_driver_dt_match[] = {
128 { .compatible = "samsung,s3c6400-fimd",
129 .data = &s3c64xx_fimd_driver_data },
130 { .compatible = "samsung,exynos4210-fimd",
131 .data = &exynos4_fimd_driver_data },
132 { .compatible = "samsung,exynos5250-fimd",
133 .data = &exynos5_fimd_driver_data },
134 {},
135 };
136
137 static inline struct fimd_driver_data *drm_fimd_get_driver_data(
138 struct platform_device *pdev)
139 {
140 const struct of_device_id *of_id =
141 of_match_device(fimd_driver_dt_match, &pdev->dev);
142
143 return (struct fimd_driver_data *)of_id->data;
144 }
145
146 static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
147 struct drm_device *drm_dev, int pipe)
148 {
149 struct fimd_context *ctx = mgr->ctx;
150
151 ctx->drm_dev = drm_dev;
152 ctx->pipe = pipe;
153
154 /*
155 * enable drm irq mode.
156 * - with irq_enabled = true, we can use the vblank feature.
157 *
158 * P.S. note that we wouldn't use drm irq handler but
159 * just specific driver own one instead because
160 * drm framework supports only one irq handler.
161 */
162 drm_dev->irq_enabled = true;
163
164 /*
165 * with vblank_disable_allowed = true, vblank interrupt will be disabled
166 * by drm timer once a current process gives up ownership of
167 * vblank event.(after drm_vblank_put function is called)
168 */
169 drm_dev->vblank_disable_allowed = true;
170
171 /* attach this sub driver to iommu mapping if supported. */
172 if (is_drm_iommu_supported(ctx->drm_dev))
173 drm_iommu_attach_device(ctx->drm_dev, ctx->dev);
174
175 return 0;
176 }
177
178 static void fimd_mgr_remove(struct exynos_drm_manager *mgr)
179 {
180 struct fimd_context *ctx = mgr->ctx;
181
182 /* detach this sub driver from iommu mapping if supported. */
183 if (is_drm_iommu_supported(ctx->drm_dev))
184 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
185 }
186
187 static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
188 const struct drm_display_mode *mode)
189 {
190 unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
191 u32 clkdiv;
192
193 /* Find the clock divider value that gets us closest to ideal_clk */
194 clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->lcd_clk), ideal_clk);
195
196 return (clkdiv < 0x100) ? clkdiv : 0xff;
197 }
198
199 static bool fimd_mode_fixup(struct exynos_drm_manager *mgr,
200 const struct drm_display_mode *mode,
201 struct drm_display_mode *adjusted_mode)
202 {
203 if (adjusted_mode->vrefresh == 0)
204 adjusted_mode->vrefresh = FIMD_DEFAULT_FRAMERATE;
205
206 return true;
207 }
208
209 static void fimd_mode_set(struct exynos_drm_manager *mgr,
210 const struct drm_display_mode *in_mode)
211 {
212 struct fimd_context *ctx = mgr->ctx;
213
214 drm_mode_copy(&ctx->mode, in_mode);
215 }
216
217 static void fimd_commit(struct exynos_drm_manager *mgr)
218 {
219 struct fimd_context *ctx = mgr->ctx;
220 struct drm_display_mode *mode = &ctx->mode;
221 struct fimd_driver_data *driver_data;
222 u32 val, clkdiv, vidcon1;
223 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
224
225 driver_data = ctx->driver_data;
226 if (ctx->suspended)
227 return;
228
229 /* nothing to do if we haven't set the mode yet */
230 if (mode->htotal == 0 || mode->vtotal == 0)
231 return;
232
233 /* setup polarity values */
234 vidcon1 = ctx->vidcon1;
235 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
236 vidcon1 |= VIDCON1_INV_VSYNC;
237 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
238 vidcon1 |= VIDCON1_INV_HSYNC;
239 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
240
241 /* setup vertical timing values. */
242 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
243 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
244 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
245
246 val = VIDTCON0_VBPD(vbpd - 1) |
247 VIDTCON0_VFPD(vfpd - 1) |
248 VIDTCON0_VSPW(vsync_len - 1);
249 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
250
251 /* setup horizontal timing values. */
252 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
253 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
254 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
255
256 val = VIDTCON1_HBPD(hbpd - 1) |
257 VIDTCON1_HFPD(hfpd - 1) |
258 VIDTCON1_HSPW(hsync_len - 1);
259 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
260
261 /* setup horizontal and vertical display size. */
262 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
263 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
264 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
265 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
266 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
267
268 /*
269 * fields of register with prefix '_F' would be updated
270 * at vsync(same as dma start)
271 */
272 val = VIDCON0_ENVID | VIDCON0_ENVID_F;
273
274 if (ctx->driver_data->has_clksel)
275 val |= VIDCON0_CLKSEL_LCD;
276
277 clkdiv = fimd_calc_clkdiv(ctx, mode);
278 if (clkdiv > 1)
279 val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
280
281 writel(val, ctx->regs + VIDCON0);
282 }
283
284 static int fimd_enable_vblank(struct exynos_drm_manager *mgr)
285 {
286 struct fimd_context *ctx = mgr->ctx;
287 u32 val;
288
289 if (ctx->suspended)
290 return -EPERM;
291
292 if (!test_and_set_bit(0, &ctx->irq_flags)) {
293 val = readl(ctx->regs + VIDINTCON0);
294
295 val |= VIDINTCON0_INT_ENABLE;
296 val |= VIDINTCON0_INT_FRAME;
297
298 val &= ~VIDINTCON0_FRAMESEL0_MASK;
299 val |= VIDINTCON0_FRAMESEL0_VSYNC;
300 val &= ~VIDINTCON0_FRAMESEL1_MASK;
301 val |= VIDINTCON0_FRAMESEL1_NONE;
302
303 writel(val, ctx->regs + VIDINTCON0);
304 }
305
306 return 0;
307 }
308
309 static void fimd_disable_vblank(struct exynos_drm_manager *mgr)
310 {
311 struct fimd_context *ctx = mgr->ctx;
312 u32 val;
313
314 if (ctx->suspended)
315 return;
316
317 if (test_and_clear_bit(0, &ctx->irq_flags)) {
318 val = readl(ctx->regs + VIDINTCON0);
319
320 val &= ~VIDINTCON0_INT_FRAME;
321 val &= ~VIDINTCON0_INT_ENABLE;
322
323 writel(val, ctx->regs + VIDINTCON0);
324 }
325 }
326
327 static void fimd_wait_for_vblank(struct exynos_drm_manager *mgr)
328 {
329 struct fimd_context *ctx = mgr->ctx;
330
331 if (ctx->suspended)
332 return;
333
334 atomic_set(&ctx->wait_vsync_event, 1);
335
336 /*
337 * wait for FIMD to signal VSYNC interrupt or return after
338 * timeout which is set to 50ms (refresh rate of 20).
339 */
340 if (!wait_event_timeout(ctx->wait_vsync_queue,
341 !atomic_read(&ctx->wait_vsync_event),
342 HZ/20))
343 DRM_DEBUG_KMS("vblank wait timed out.\n");
344 }
345
346 static void fimd_win_mode_set(struct exynos_drm_manager *mgr,
347 struct exynos_drm_overlay *overlay)
348 {
349 struct fimd_context *ctx = mgr->ctx;
350 struct fimd_win_data *win_data;
351 int win;
352 unsigned long offset;
353
354 if (!overlay) {
355 DRM_ERROR("overlay is NULL\n");
356 return;
357 }
358
359 win = overlay->zpos;
360 if (win == DEFAULT_ZPOS)
361 win = ctx->default_win;
362
363 if (win < 0 || win >= WINDOWS_NR)
364 return;
365
366 offset = overlay->fb_x * (overlay->bpp >> 3);
367 offset += overlay->fb_y * overlay->pitch;
368
369 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
370
371 win_data = &ctx->win_data[win];
372
373 win_data->offset_x = overlay->crtc_x;
374 win_data->offset_y = overlay->crtc_y;
375 win_data->ovl_width = overlay->crtc_width;
376 win_data->ovl_height = overlay->crtc_height;
377 win_data->fb_width = overlay->fb_width;
378 win_data->fb_height = overlay->fb_height;
379 win_data->dma_addr = overlay->dma_addr[0] + offset;
380 win_data->bpp = overlay->bpp;
381 win_data->pixel_format = overlay->pixel_format;
382 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
383 (overlay->bpp >> 3);
384 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
385
386 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
387 win_data->offset_x, win_data->offset_y);
388 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
389 win_data->ovl_width, win_data->ovl_height);
390 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
391 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
392 overlay->fb_width, overlay->crtc_width);
393 }
394
395 static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win)
396 {
397 struct fimd_win_data *win_data = &ctx->win_data[win];
398 unsigned long val;
399
400 val = WINCONx_ENWIN;
401
402 /*
403 * In case of s3c64xx, window 0 doesn't support alpha channel.
404 * So the request format is ARGB8888 then change it to XRGB8888.
405 */
406 if (ctx->driver_data->has_limited_fmt && !win) {
407 if (win_data->pixel_format == DRM_FORMAT_ARGB8888)
408 win_data->pixel_format = DRM_FORMAT_XRGB8888;
409 }
410
411 switch (win_data->pixel_format) {
412 case DRM_FORMAT_C8:
413 val |= WINCON0_BPPMODE_8BPP_PALETTE;
414 val |= WINCONx_BURSTLEN_8WORD;
415 val |= WINCONx_BYTSWP;
416 break;
417 case DRM_FORMAT_XRGB1555:
418 val |= WINCON0_BPPMODE_16BPP_1555;
419 val |= WINCONx_HAWSWP;
420 val |= WINCONx_BURSTLEN_16WORD;
421 break;
422 case DRM_FORMAT_RGB565:
423 val |= WINCON0_BPPMODE_16BPP_565;
424 val |= WINCONx_HAWSWP;
425 val |= WINCONx_BURSTLEN_16WORD;
426 break;
427 case DRM_FORMAT_XRGB8888:
428 val |= WINCON0_BPPMODE_24BPP_888;
429 val |= WINCONx_WSWP;
430 val |= WINCONx_BURSTLEN_16WORD;
431 break;
432 case DRM_FORMAT_ARGB8888:
433 val |= WINCON1_BPPMODE_25BPP_A1888
434 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
435 val |= WINCONx_WSWP;
436 val |= WINCONx_BURSTLEN_16WORD;
437 break;
438 default:
439 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
440
441 val |= WINCON0_BPPMODE_24BPP_888;
442 val |= WINCONx_WSWP;
443 val |= WINCONx_BURSTLEN_16WORD;
444 break;
445 }
446
447 DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp);
448
449 writel(val, ctx->regs + WINCON(win));
450 }
451
452 static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
453 {
454 unsigned int keycon0 = 0, keycon1 = 0;
455
456 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
457 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
458
459 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
460
461 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
462 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
463 }
464
465 /**
466 * shadow_protect_win() - disable updating values from shadow registers at vsync
467 *
468 * @win: window to protect registers for
469 * @protect: 1 to protect (disable updates)
470 */
471 static void fimd_shadow_protect_win(struct fimd_context *ctx,
472 int win, bool protect)
473 {
474 u32 reg, bits, val;
475
476 if (ctx->driver_data->has_shadowcon) {
477 reg = SHADOWCON;
478 bits = SHADOWCON_WINx_PROTECT(win);
479 } else {
480 reg = PRTCON;
481 bits = PRTCON_PROTECT;
482 }
483
484 val = readl(ctx->regs + reg);
485 if (protect)
486 val |= bits;
487 else
488 val &= ~bits;
489 writel(val, ctx->regs + reg);
490 }
491
492 static void fimd_win_commit(struct exynos_drm_manager *mgr, int zpos)
493 {
494 struct fimd_context *ctx = mgr->ctx;
495 struct fimd_win_data *win_data;
496 int win = zpos;
497 unsigned long val, alpha, size;
498 unsigned int last_x;
499 unsigned int last_y;
500
501 if (ctx->suspended)
502 return;
503
504 if (win == DEFAULT_ZPOS)
505 win = ctx->default_win;
506
507 if (win < 0 || win >= WINDOWS_NR)
508 return;
509
510 win_data = &ctx->win_data[win];
511
512 /* If suspended, enable this on resume */
513 if (ctx->suspended) {
514 win_data->resume = true;
515 return;
516 }
517
518 /*
519 * SHADOWCON/PRTCON register is used for enabling timing.
520 *
521 * for example, once only width value of a register is set,
522 * if the dma is started then fimd hardware could malfunction so
523 * with protect window setting, the register fields with prefix '_F'
524 * wouldn't be updated at vsync also but updated once unprotect window
525 * is set.
526 */
527
528 /* protect windows */
529 fimd_shadow_protect_win(ctx, win, true);
530
531 /* buffer start address */
532 val = (unsigned long)win_data->dma_addr;
533 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
534
535 /* buffer end address */
536 size = win_data->fb_width * win_data->ovl_height * (win_data->bpp >> 3);
537 val = (unsigned long)(win_data->dma_addr + size);
538 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
539
540 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
541 (unsigned long)win_data->dma_addr, val, size);
542 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
543 win_data->ovl_width, win_data->ovl_height);
544
545 /* buffer size */
546 val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) |
547 VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size) |
548 VIDW_BUF_SIZE_OFFSET_E(win_data->buf_offsize) |
549 VIDW_BUF_SIZE_PAGEWIDTH_E(win_data->line_size);
550 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
551
552 /* OSD position */
553 val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) |
554 VIDOSDxA_TOPLEFT_Y(win_data->offset_y) |
555 VIDOSDxA_TOPLEFT_X_E(win_data->offset_x) |
556 VIDOSDxA_TOPLEFT_Y_E(win_data->offset_y);
557 writel(val, ctx->regs + VIDOSD_A(win));
558
559 last_x = win_data->offset_x + win_data->ovl_width;
560 if (last_x)
561 last_x--;
562 last_y = win_data->offset_y + win_data->ovl_height;
563 if (last_y)
564 last_y--;
565
566 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
567 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
568
569 writel(val, ctx->regs + VIDOSD_B(win));
570
571 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
572 win_data->offset_x, win_data->offset_y, last_x, last_y);
573
574 /* hardware window 0 doesn't support alpha channel. */
575 if (win != 0) {
576 /* OSD alpha */
577 alpha = VIDISD14C_ALPHA1_R(0xf) |
578 VIDISD14C_ALPHA1_G(0xf) |
579 VIDISD14C_ALPHA1_B(0xf);
580
581 writel(alpha, ctx->regs + VIDOSD_C(win));
582 }
583
584 /* OSD size */
585 if (win != 3 && win != 4) {
586 u32 offset = VIDOSD_D(win);
587 if (win == 0)
588 offset = VIDOSD_C(win);
589 val = win_data->ovl_width * win_data->ovl_height;
590 writel(val, ctx->regs + offset);
591
592 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
593 }
594
595 fimd_win_set_pixfmt(ctx, win);
596
597 /* hardware window 0 doesn't support color key. */
598 if (win != 0)
599 fimd_win_set_colkey(ctx, win);
600
601 /* wincon */
602 val = readl(ctx->regs + WINCON(win));
603 val |= WINCONx_ENWIN;
604 writel(val, ctx->regs + WINCON(win));
605
606 /* Enable DMA channel and unprotect windows */
607 fimd_shadow_protect_win(ctx, win, false);
608
609 if (ctx->driver_data->has_shadowcon) {
610 val = readl(ctx->regs + SHADOWCON);
611 val |= SHADOWCON_CHx_ENABLE(win);
612 writel(val, ctx->regs + SHADOWCON);
613 }
614
615 win_data->enabled = true;
616 }
617
618 static void fimd_win_disable(struct exynos_drm_manager *mgr, int zpos)
619 {
620 struct fimd_context *ctx = mgr->ctx;
621 struct fimd_win_data *win_data;
622 int win = zpos;
623 u32 val;
624
625 if (win == DEFAULT_ZPOS)
626 win = ctx->default_win;
627
628 if (win < 0 || win >= WINDOWS_NR)
629 return;
630
631 win_data = &ctx->win_data[win];
632
633 if (ctx->suspended) {
634 /* do not resume this window*/
635 win_data->resume = false;
636 return;
637 }
638
639 /* protect windows */
640 fimd_shadow_protect_win(ctx, win, true);
641
642 /* wincon */
643 val = readl(ctx->regs + WINCON(win));
644 val &= ~WINCONx_ENWIN;
645 writel(val, ctx->regs + WINCON(win));
646
647 /* unprotect windows */
648 if (ctx->driver_data->has_shadowcon) {
649 val = readl(ctx->regs + SHADOWCON);
650 val &= ~SHADOWCON_CHx_ENABLE(win);
651 writel(val, ctx->regs + SHADOWCON);
652 }
653
654 fimd_shadow_protect_win(ctx, win, false);
655
656 win_data->enabled = false;
657 }
658
659 static void fimd_clear_win(struct fimd_context *ctx, int win)
660 {
661 writel(0, ctx->regs + WINCON(win));
662 writel(0, ctx->regs + VIDOSD_A(win));
663 writel(0, ctx->regs + VIDOSD_B(win));
664 writel(0, ctx->regs + VIDOSD_C(win));
665
666 if (win == 1 || win == 2)
667 writel(0, ctx->regs + VIDOSD_D(win));
668
669 fimd_shadow_protect_win(ctx, win, false);
670 }
671
672 static void fimd_window_suspend(struct exynos_drm_manager *mgr)
673 {
674 struct fimd_context *ctx = mgr->ctx;
675 struct fimd_win_data *win_data;
676 int i;
677
678 for (i = 0; i < WINDOWS_NR; i++) {
679 win_data = &ctx->win_data[i];
680 win_data->resume = win_data->enabled;
681 if (win_data->enabled)
682 fimd_win_disable(mgr, i);
683 }
684 fimd_wait_for_vblank(mgr);
685 }
686
687 static void fimd_window_resume(struct exynos_drm_manager *mgr)
688 {
689 struct fimd_context *ctx = mgr->ctx;
690 struct fimd_win_data *win_data;
691 int i;
692
693 for (i = 0; i < WINDOWS_NR; i++) {
694 win_data = &ctx->win_data[i];
695 win_data->enabled = win_data->resume;
696 win_data->resume = false;
697 }
698 }
699
700 static void fimd_apply(struct exynos_drm_manager *mgr)
701 {
702 struct fimd_context *ctx = mgr->ctx;
703 struct fimd_win_data *win_data;
704 int i;
705
706 for (i = 0; i < WINDOWS_NR; i++) {
707 win_data = &ctx->win_data[i];
708 if (win_data->enabled)
709 fimd_win_commit(mgr, i);
710 }
711
712 fimd_commit(mgr);
713 }
714
715 static int fimd_poweron(struct exynos_drm_manager *mgr)
716 {
717 struct fimd_context *ctx = mgr->ctx;
718 int ret;
719
720 if (!ctx->suspended)
721 return 0;
722
723 ctx->suspended = false;
724
725 pm_runtime_get_sync(ctx->dev);
726
727 ret = clk_prepare_enable(ctx->bus_clk);
728 if (ret < 0) {
729 DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
730 goto bus_clk_err;
731 }
732
733 ret = clk_prepare_enable(ctx->lcd_clk);
734 if (ret < 0) {
735 DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
736 goto lcd_clk_err;
737 }
738
739 /* if vblank was enabled status, enable it again. */
740 if (test_and_clear_bit(0, &ctx->irq_flags)) {
741 ret = fimd_enable_vblank(mgr);
742 if (ret) {
743 DRM_ERROR("Failed to re-enable vblank [%d]\n", ret);
744 goto enable_vblank_err;
745 }
746 }
747
748 fimd_window_resume(mgr);
749
750 fimd_apply(mgr);
751
752 return 0;
753
754 enable_vblank_err:
755 clk_disable_unprepare(ctx->lcd_clk);
756 lcd_clk_err:
757 clk_disable_unprepare(ctx->bus_clk);
758 bus_clk_err:
759 ctx->suspended = true;
760 return ret;
761 }
762
763 static int fimd_poweroff(struct exynos_drm_manager *mgr)
764 {
765 struct fimd_context *ctx = mgr->ctx;
766
767 if (ctx->suspended)
768 return 0;
769
770 /*
771 * We need to make sure that all windows are disabled before we
772 * suspend that connector. Otherwise we might try to scan from
773 * a destroyed buffer later.
774 */
775 fimd_window_suspend(mgr);
776
777 clk_disable_unprepare(ctx->lcd_clk);
778 clk_disable_unprepare(ctx->bus_clk);
779
780 pm_runtime_put_sync(ctx->dev);
781
782 ctx->suspended = true;
783 return 0;
784 }
785
786 static void fimd_dpms(struct exynos_drm_manager *mgr, int mode)
787 {
788 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
789
790 switch (mode) {
791 case DRM_MODE_DPMS_ON:
792 fimd_poweron(mgr);
793 break;
794 case DRM_MODE_DPMS_STANDBY:
795 case DRM_MODE_DPMS_SUSPEND:
796 case DRM_MODE_DPMS_OFF:
797 fimd_poweroff(mgr);
798 break;
799 default:
800 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
801 break;
802 }
803 }
804
805 static struct exynos_drm_manager_ops fimd_manager_ops = {
806 .initialize = fimd_mgr_initialize,
807 .remove = fimd_mgr_remove,
808 .dpms = fimd_dpms,
809 .mode_fixup = fimd_mode_fixup,
810 .mode_set = fimd_mode_set,
811 .commit = fimd_commit,
812 .enable_vblank = fimd_enable_vblank,
813 .disable_vblank = fimd_disable_vblank,
814 .wait_for_vblank = fimd_wait_for_vblank,
815 .win_mode_set = fimd_win_mode_set,
816 .win_commit = fimd_win_commit,
817 .win_disable = fimd_win_disable,
818 };
819
820 static struct exynos_drm_manager fimd_manager = {
821 .type = EXYNOS_DISPLAY_TYPE_LCD,
822 .ops = &fimd_manager_ops,
823 };
824
825 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
826 {
827 struct fimd_context *ctx = (struct fimd_context *)dev_id;
828 u32 val;
829
830 val = readl(ctx->regs + VIDINTCON1);
831
832 if (val & VIDINTCON1_INT_FRAME)
833 /* VSYNC interrupt */
834 writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
835
836 /* check the crtc is detached already from encoder */
837 if (ctx->pipe < 0 || !ctx->drm_dev)
838 goto out;
839
840 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
841 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
842
843 /* set wait vsync event to zero and wake up queue. */
844 if (atomic_read(&ctx->wait_vsync_event)) {
845 atomic_set(&ctx->wait_vsync_event, 0);
846 wake_up(&ctx->wait_vsync_queue);
847 }
848 out:
849 return IRQ_HANDLED;
850 }
851
852 static int fimd_probe(struct platform_device *pdev)
853 {
854 struct device *dev = &pdev->dev;
855 struct fimd_context *ctx;
856 struct resource *res;
857 int win;
858 int ret = -EINVAL;
859
860 if (!dev->of_node)
861 return -ENODEV;
862
863 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
864 if (!ctx)
865 return -ENOMEM;
866
867 ctx->dev = dev;
868 ctx->suspended = true;
869
870 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
871 ctx->vidcon1 |= VIDCON1_INV_VDEN;
872 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
873 ctx->vidcon1 |= VIDCON1_INV_VCLK;
874
875 ctx->bus_clk = devm_clk_get(dev, "fimd");
876 if (IS_ERR(ctx->bus_clk)) {
877 dev_err(dev, "failed to get bus clock\n");
878 return PTR_ERR(ctx->bus_clk);
879 }
880
881 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
882 if (IS_ERR(ctx->lcd_clk)) {
883 dev_err(dev, "failed to get lcd clock\n");
884 return PTR_ERR(ctx->lcd_clk);
885 }
886
887 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
888
889 ctx->regs = devm_ioremap_resource(dev, res);
890 if (IS_ERR(ctx->regs))
891 return PTR_ERR(ctx->regs);
892
893 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "vsync");
894 if (!res) {
895 dev_err(dev, "irq request failed.\n");
896 return -ENXIO;
897 }
898
899 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
900 0, "drm_fimd", ctx);
901 if (ret) {
902 dev_err(dev, "irq request failed.\n");
903 return ret;
904 }
905
906 ctx->driver_data = drm_fimd_get_driver_data(pdev);
907 init_waitqueue_head(&ctx->wait_vsync_queue);
908 atomic_set(&ctx->wait_vsync_event, 0);
909
910 platform_set_drvdata(pdev, &fimd_manager);
911
912 fimd_manager.ctx = ctx;
913 exynos_drm_manager_register(&fimd_manager);
914
915 exynos_dpi_probe(ctx->dev);
916
917 pm_runtime_enable(dev);
918
919 for (win = 0; win < WINDOWS_NR; win++)
920 fimd_clear_win(ctx, win);
921
922 return 0;
923 }
924
925 static int fimd_remove(struct platform_device *pdev)
926 {
927 struct exynos_drm_manager *mgr = platform_get_drvdata(pdev);
928
929 exynos_dpi_remove(&pdev->dev);
930
931 exynos_drm_manager_unregister(&fimd_manager);
932
933 fimd_dpms(mgr, DRM_MODE_DPMS_OFF);
934
935 pm_runtime_disable(&pdev->dev);
936
937 return 0;
938 }
939
940 struct platform_driver fimd_driver = {
941 .probe = fimd_probe,
942 .remove = fimd_remove,
943 .driver = {
944 .name = "exynos4-fb",
945 .owner = THIS_MODULE,
946 .of_match_table = fimd_driver_dt_match,
947 },
948 };
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