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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / gpu / drm / exynos / exynos_drm_fimd.c
blob56458eea05010932c5a96228723c3c8c40321c9b
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 "drmP.h"
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/clk.h>
20 #include <linux/pm_runtime.h>
21
22 #include <drm/exynos_drm.h>
23 #include <plat/regs-fb-v4.h>
24
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_fbdev.h"
27 #include "exynos_drm_crtc.h"
28
29 /*
30 * FIMD is stand for Fully Interactive Mobile Display and
31 * as a display controller, it transfers contents drawn on memory
32 * to a LCD Panel through Display Interfaces such as RGB or
33 * CPU Interface.
34 */
35
36 /* position control register for hardware window 0, 2 ~ 4.*/
37 #define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16)
38 #define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16)
39 /* size control register for hardware window 0. */
40 #define VIDOSD_C_SIZE_W0 (VIDOSD_BASE + 0x08)
41 /* alpha control register for hardware window 1 ~ 4. */
42 #define VIDOSD_C(win) (VIDOSD_BASE + 0x18 + (win) * 16)
43 /* size control register for hardware window 1 ~ 4. */
44 #define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16)
45
46 #define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8)
47 #define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8)
48 #define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4)
49
50 /* color key control register for hardware window 1 ~ 4. */
51 #define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + (x * 8))
52 /* color key value register for hardware window 1 ~ 4. */
53 #define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + (x * 8))
54
55 /* FIMD has totally five hardware windows. */
56 #define WINDOWS_NR 5
57
58 #define get_fimd_context(dev) platform_get_drvdata(to_platform_device(dev))
59
60 struct fimd_win_data {
61 unsigned int offset_x;
62 unsigned int offset_y;
63 unsigned int ovl_width;
64 unsigned int ovl_height;
65 unsigned int fb_width;
66 unsigned int fb_height;
67 unsigned int bpp;
68 dma_addr_t dma_addr;
69 void __iomem *vaddr;
70 unsigned int buf_offsize;
71 unsigned int line_size; /* bytes */
72 bool enabled;
73 };
74
75 struct fimd_context {
76 struct exynos_drm_subdrv subdrv;
77 int irq;
78 struct drm_crtc *crtc;
79 struct clk *bus_clk;
80 struct clk *lcd_clk;
81 struct resource *regs_res;
82 void __iomem *regs;
83 struct fimd_win_data win_data[WINDOWS_NR];
84 unsigned int clkdiv;
85 unsigned int default_win;
86 unsigned long irq_flags;
87 u32 vidcon0;
88 u32 vidcon1;
89 bool suspended;
90 struct mutex lock;
91
92 struct exynos_drm_panel_info *panel;
93 };
94
95 static bool fimd_display_is_connected(struct device *dev)
96 {
97 DRM_DEBUG_KMS("%s\n", __FILE__);
98
99 /* TODO. */
100
101 return true;
102 }
103
104 static void *fimd_get_panel(struct device *dev)
105 {
106 struct fimd_context *ctx = get_fimd_context(dev);
107
108 DRM_DEBUG_KMS("%s\n", __FILE__);
109
110 return ctx->panel;
111 }
112
113 static int fimd_check_timing(struct device *dev, void *timing)
114 {
115 DRM_DEBUG_KMS("%s\n", __FILE__);
116
117 /* TODO. */
118
119 return 0;
120 }
121
122 static int fimd_display_power_on(struct device *dev, int mode)
123 {
124 DRM_DEBUG_KMS("%s\n", __FILE__);
125
126 /* TODO */
127
128 return 0;
129 }
130
131 static struct exynos_drm_display_ops fimd_display_ops = {
132 .type = EXYNOS_DISPLAY_TYPE_LCD,
133 .is_connected = fimd_display_is_connected,
134 .get_panel = fimd_get_panel,
135 .check_timing = fimd_check_timing,
136 .power_on = fimd_display_power_on,
137 };
138
139 static void fimd_dpms(struct device *subdrv_dev, int mode)
140 {
141 struct fimd_context *ctx = get_fimd_context(subdrv_dev);
142
143 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
144
145 mutex_lock(&ctx->lock);
146
147 switch (mode) {
148 case DRM_MODE_DPMS_ON:
149 /*
150 * enable fimd hardware only if suspended status.
151 *
152 * P.S. fimd_dpms function would be called at booting time so
153 * clk_enable could be called double time.
154 */
155 if (ctx->suspended)
156 pm_runtime_get_sync(subdrv_dev);
157 break;
158 case DRM_MODE_DPMS_STANDBY:
159 case DRM_MODE_DPMS_SUSPEND:
160 case DRM_MODE_DPMS_OFF:
161 if (!ctx->suspended)
162 pm_runtime_put_sync(subdrv_dev);
163 break;
164 default:
165 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
166 break;
167 }
168
169 mutex_unlock(&ctx->lock);
170 }
171
172 static void fimd_apply(struct device *subdrv_dev)
173 {
174 struct fimd_context *ctx = get_fimd_context(subdrv_dev);
175 struct exynos_drm_manager *mgr = &ctx->subdrv.manager;
176 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
177 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
178 struct fimd_win_data *win_data;
179 int i;
180
181 DRM_DEBUG_KMS("%s\n", __FILE__);
182
183 for (i = 0; i < WINDOWS_NR; i++) {
184 win_data = &ctx->win_data[i];
185 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
186 ovl_ops->commit(subdrv_dev, i);
187 }
188
189 if (mgr_ops && mgr_ops->commit)
190 mgr_ops->commit(subdrv_dev);
191 }
192
193 static void fimd_commit(struct device *dev)
194 {
195 struct fimd_context *ctx = get_fimd_context(dev);
196 struct exynos_drm_panel_info *panel = ctx->panel;
197 struct fb_videomode *timing = &panel->timing;
198 u32 val;
199
200 if (ctx->suspended)
201 return;
202
203 DRM_DEBUG_KMS("%s\n", __FILE__);
204
205 /* setup polarity values from machine code. */
206 writel(ctx->vidcon1, ctx->regs + VIDCON1);
207
208 /* setup vertical timing values. */
209 val = VIDTCON0_VBPD(timing->upper_margin - 1) |
210 VIDTCON0_VFPD(timing->lower_margin - 1) |
211 VIDTCON0_VSPW(timing->vsync_len - 1);
212 writel(val, ctx->regs + VIDTCON0);
213
214 /* setup horizontal timing values. */
215 val = VIDTCON1_HBPD(timing->left_margin - 1) |
216 VIDTCON1_HFPD(timing->right_margin - 1) |
217 VIDTCON1_HSPW(timing->hsync_len - 1);
218 writel(val, ctx->regs + VIDTCON1);
219
220 /* setup horizontal and vertical display size. */
221 val = VIDTCON2_LINEVAL(timing->yres - 1) |
222 VIDTCON2_HOZVAL(timing->xres - 1);
223 writel(val, ctx->regs + VIDTCON2);
224
225 /* setup clock source, clock divider, enable dma. */
226 val = ctx->vidcon0;
227 val &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR);
228
229 if (ctx->clkdiv > 1)
230 val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR;
231 else
232 val &= ~VIDCON0_CLKDIR; /* 1:1 clock */
233
234 /*
235 * fields of register with prefix '_F' would be updated
236 * at vsync(same as dma start)
237 */
238 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
239 writel(val, ctx->regs + VIDCON0);
240 }
241
242 static int fimd_enable_vblank(struct device *dev)
243 {
244 struct fimd_context *ctx = get_fimd_context(dev);
245 u32 val;
246
247 DRM_DEBUG_KMS("%s\n", __FILE__);
248
249 if (ctx->suspended)
250 return -EPERM;
251
252 if (!test_and_set_bit(0, &ctx->irq_flags)) {
253 val = readl(ctx->regs + VIDINTCON0);
254
255 val |= VIDINTCON0_INT_ENABLE;
256 val |= VIDINTCON0_INT_FRAME;
257
258 val &= ~VIDINTCON0_FRAMESEL0_MASK;
259 val |= VIDINTCON0_FRAMESEL0_VSYNC;
260 val &= ~VIDINTCON0_FRAMESEL1_MASK;
261 val |= VIDINTCON0_FRAMESEL1_NONE;
262
263 writel(val, ctx->regs + VIDINTCON0);
264 }
265
266 return 0;
267 }
268
269 static void fimd_disable_vblank(struct device *dev)
270 {
271 struct fimd_context *ctx = get_fimd_context(dev);
272 u32 val;
273
274 DRM_DEBUG_KMS("%s\n", __FILE__);
275
276 if (ctx->suspended)
277 return;
278
279 if (test_and_clear_bit(0, &ctx->irq_flags)) {
280 val = readl(ctx->regs + VIDINTCON0);
281
282 val &= ~VIDINTCON0_INT_FRAME;
283 val &= ~VIDINTCON0_INT_ENABLE;
284
285 writel(val, ctx->regs + VIDINTCON0);
286 }
287 }
288
289 static struct exynos_drm_manager_ops fimd_manager_ops = {
290 .dpms = fimd_dpms,
291 .apply = fimd_apply,
292 .commit = fimd_commit,
293 .enable_vblank = fimd_enable_vblank,
294 .disable_vblank = fimd_disable_vblank,
295 };
296
297 static void fimd_win_mode_set(struct device *dev,
298 struct exynos_drm_overlay *overlay)
299 {
300 struct fimd_context *ctx = get_fimd_context(dev);
301 struct fimd_win_data *win_data;
302 int win;
303 unsigned long offset;
304
305 DRM_DEBUG_KMS("%s\n", __FILE__);
306
307 if (!overlay) {
308 dev_err(dev, "overlay is NULL\n");
309 return;
310 }
311
312 win = overlay->zpos;
313 if (win == DEFAULT_ZPOS)
314 win = ctx->default_win;
315
316 if (win < 0 || win > WINDOWS_NR)
317 return;
318
319 offset = overlay->fb_x * (overlay->bpp >> 3);
320 offset += overlay->fb_y * overlay->pitch;
321
322 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
323
324 win_data = &ctx->win_data[win];
325
326 win_data->offset_x = overlay->crtc_x;
327 win_data->offset_y = overlay->crtc_y;
328 win_data->ovl_width = overlay->crtc_width;
329 win_data->ovl_height = overlay->crtc_height;
330 win_data->fb_width = overlay->fb_width;
331 win_data->fb_height = overlay->fb_height;
332 win_data->dma_addr = overlay->dma_addr[0] + offset;
333 win_data->vaddr = overlay->vaddr[0] + offset;
334 win_data->bpp = overlay->bpp;
335 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
336 (overlay->bpp >> 3);
337 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
338
339 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
340 win_data->offset_x, win_data->offset_y);
341 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
342 win_data->ovl_width, win_data->ovl_height);
343 DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
344 (unsigned long)win_data->dma_addr,
345 (unsigned long)win_data->vaddr);
346 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
347 overlay->fb_width, overlay->crtc_width);
348 }
349
350 static void fimd_win_set_pixfmt(struct device *dev, unsigned int win)
351 {
352 struct fimd_context *ctx = get_fimd_context(dev);
353 struct fimd_win_data *win_data = &ctx->win_data[win];
354 unsigned long val;
355
356 DRM_DEBUG_KMS("%s\n", __FILE__);
357
358 val = WINCONx_ENWIN;
359
360 switch (win_data->bpp) {
361 case 1:
362 val |= WINCON0_BPPMODE_1BPP;
363 val |= WINCONx_BITSWP;
364 val |= WINCONx_BURSTLEN_4WORD;
365 break;
366 case 2:
367 val |= WINCON0_BPPMODE_2BPP;
368 val |= WINCONx_BITSWP;
369 val |= WINCONx_BURSTLEN_8WORD;
370 break;
371 case 4:
372 val |= WINCON0_BPPMODE_4BPP;
373 val |= WINCONx_BITSWP;
374 val |= WINCONx_BURSTLEN_8WORD;
375 break;
376 case 8:
377 val |= WINCON0_BPPMODE_8BPP_PALETTE;
378 val |= WINCONx_BURSTLEN_8WORD;
379 val |= WINCONx_BYTSWP;
380 break;
381 case 16:
382 val |= WINCON0_BPPMODE_16BPP_565;
383 val |= WINCONx_HAWSWP;
384 val |= WINCONx_BURSTLEN_16WORD;
385 break;
386 case 24:
387 val |= WINCON0_BPPMODE_24BPP_888;
388 val |= WINCONx_WSWP;
389 val |= WINCONx_BURSTLEN_16WORD;
390 break;
391 case 32:
392 val |= WINCON1_BPPMODE_28BPP_A4888
393 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
394 val |= WINCONx_WSWP;
395 val |= WINCONx_BURSTLEN_16WORD;
396 break;
397 default:
398 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
399
400 val |= WINCON0_BPPMODE_24BPP_888;
401 val |= WINCONx_WSWP;
402 val |= WINCONx_BURSTLEN_16WORD;
403 break;
404 }
405
406 DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp);
407
408 writel(val, ctx->regs + WINCON(win));
409 }
410
411 static void fimd_win_set_colkey(struct device *dev, unsigned int win)
412 {
413 struct fimd_context *ctx = get_fimd_context(dev);
414 unsigned int keycon0 = 0, keycon1 = 0;
415
416 DRM_DEBUG_KMS("%s\n", __FILE__);
417
418 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
419 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
420
421 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
422
423 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
424 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
425 }
426
427 static void fimd_win_commit(struct device *dev, int zpos)
428 {
429 struct fimd_context *ctx = get_fimd_context(dev);
430 struct fimd_win_data *win_data;
431 int win = zpos;
432 unsigned long val, alpha, size;
433
434 DRM_DEBUG_KMS("%s\n", __FILE__);
435
436 if (ctx->suspended)
437 return;
438
439 if (win == DEFAULT_ZPOS)
440 win = ctx->default_win;
441
442 if (win < 0 || win > WINDOWS_NR)
443 return;
444
445 win_data = &ctx->win_data[win];
446
447 /*
448 * SHADOWCON register is used for enabling timing.
449 *
450 * for example, once only width value of a register is set,
451 * if the dma is started then fimd hardware could malfunction so
452 * with protect window setting, the register fields with prefix '_F'
453 * wouldn't be updated at vsync also but updated once unprotect window
454 * is set.
455 */
456
457 /* protect windows */
458 val = readl(ctx->regs + SHADOWCON);
459 val |= SHADOWCON_WINx_PROTECT(win);
460 writel(val, ctx->regs + SHADOWCON);
461
462 /* buffer start address */
463 val = (unsigned long)win_data->dma_addr;
464 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
465
466 /* buffer end address */
467 size = win_data->fb_width * win_data->ovl_height * (win_data->bpp >> 3);
468 val = (unsigned long)(win_data->dma_addr + size);
469 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
470
471 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
472 (unsigned long)win_data->dma_addr, val, size);
473 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
474 win_data->ovl_width, win_data->ovl_height);
475
476 /* buffer size */
477 val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) |
478 VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size);
479 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
480
481 /* OSD position */
482 val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) |
483 VIDOSDxA_TOPLEFT_Y(win_data->offset_y);
484 writel(val, ctx->regs + VIDOSD_A(win));
485
486 val = VIDOSDxB_BOTRIGHT_X(win_data->offset_x +
487 win_data->ovl_width - 1) |
488 VIDOSDxB_BOTRIGHT_Y(win_data->offset_y +
489 win_data->ovl_height - 1);
490 writel(val, ctx->regs + VIDOSD_B(win));
491
492 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
493 win_data->offset_x, win_data->offset_y,
494 win_data->offset_x + win_data->ovl_width - 1,
495 win_data->offset_y + win_data->ovl_height - 1);
496
497 /* hardware window 0 doesn't support alpha channel. */
498 if (win != 0) {
499 /* OSD alpha */
500 alpha = VIDISD14C_ALPHA1_R(0xf) |
501 VIDISD14C_ALPHA1_G(0xf) |
502 VIDISD14C_ALPHA1_B(0xf);
503
504 writel(alpha, ctx->regs + VIDOSD_C(win));
505 }
506
507 /* OSD size */
508 if (win != 3 && win != 4) {
509 u32 offset = VIDOSD_D(win);
510 if (win == 0)
511 offset = VIDOSD_C_SIZE_W0;
512 val = win_data->ovl_width * win_data->ovl_height;
513 writel(val, ctx->regs + offset);
514
515 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
516 }
517
518 fimd_win_set_pixfmt(dev, win);
519
520 /* hardware window 0 doesn't support color key. */
521 if (win != 0)
522 fimd_win_set_colkey(dev, win);
523
524 /* wincon */
525 val = readl(ctx->regs + WINCON(win));
526 val |= WINCONx_ENWIN;
527 writel(val, ctx->regs + WINCON(win));
528
529 /* Enable DMA channel and unprotect windows */
530 val = readl(ctx->regs + SHADOWCON);
531 val |= SHADOWCON_CHx_ENABLE(win);
532 val &= ~SHADOWCON_WINx_PROTECT(win);
533 writel(val, ctx->regs + SHADOWCON);
534
535 win_data->enabled = true;
536 }
537
538 static void fimd_win_disable(struct device *dev, int zpos)
539 {
540 struct fimd_context *ctx = get_fimd_context(dev);
541 struct fimd_win_data *win_data;
542 int win = zpos;
543 u32 val;
544
545 DRM_DEBUG_KMS("%s\n", __FILE__);
546
547 if (win == DEFAULT_ZPOS)
548 win = ctx->default_win;
549
550 if (win < 0 || win > WINDOWS_NR)
551 return;
552
553 win_data = &ctx->win_data[win];
554
555 /* protect windows */
556 val = readl(ctx->regs + SHADOWCON);
557 val |= SHADOWCON_WINx_PROTECT(win);
558 writel(val, ctx->regs + SHADOWCON);
559
560 /* wincon */
561 val = readl(ctx->regs + WINCON(win));
562 val &= ~WINCONx_ENWIN;
563 writel(val, ctx->regs + WINCON(win));
564
565 /* unprotect windows */
566 val = readl(ctx->regs + SHADOWCON);
567 val &= ~SHADOWCON_CHx_ENABLE(win);
568 val &= ~SHADOWCON_WINx_PROTECT(win);
569 writel(val, ctx->regs + SHADOWCON);
570
571 win_data->enabled = false;
572 }
573
574 static struct exynos_drm_overlay_ops fimd_overlay_ops = {
575 .mode_set = fimd_win_mode_set,
576 .commit = fimd_win_commit,
577 .disable = fimd_win_disable,
578 };
579
580 static void fimd_finish_pageflip(struct drm_device *drm_dev, int crtc)
581 {
582 struct exynos_drm_private *dev_priv = drm_dev->dev_private;
583 struct drm_pending_vblank_event *e, *t;
584 struct timeval now;
585 unsigned long flags;
586 bool is_checked = false;
587
588 spin_lock_irqsave(&drm_dev->event_lock, flags);
589
590 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
591 base.link) {
592 /* if event's pipe isn't same as crtc then ignore it. */
593 if (crtc != e->pipe)
594 continue;
595
596 is_checked = true;
597
598 do_gettimeofday(&now);
599 e->event.sequence = 0;
600 e->event.tv_sec = now.tv_sec;
601 e->event.tv_usec = now.tv_usec;
602
603 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
604 wake_up_interruptible(&e->base.file_priv->event_wait);
605 }
606
607 if (is_checked) {
608 /*
609 * call drm_vblank_put only in case that drm_vblank_get was
610 * called.
611 */
612 if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0)
613 drm_vblank_put(drm_dev, crtc);
614
615 /*
616 * don't off vblank if vblank_disable_allowed is 1,
617 * because vblank would be off by timer handler.
618 */
619 if (!drm_dev->vblank_disable_allowed)
620 drm_vblank_off(drm_dev, crtc);
621 }
622
623 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
624 }
625
626 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
627 {
628 struct fimd_context *ctx = (struct fimd_context *)dev_id;
629 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
630 struct drm_device *drm_dev = subdrv->drm_dev;
631 struct exynos_drm_manager *manager = &subdrv->manager;
632 u32 val;
633
634 val = readl(ctx->regs + VIDINTCON1);
635
636 if (val & VIDINTCON1_INT_FRAME)
637 /* VSYNC interrupt */
638 writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
639
640 /* check the crtc is detached already from encoder */
641 if (manager->pipe < 0)
642 goto out;
643
644 drm_handle_vblank(drm_dev, manager->pipe);
645 fimd_finish_pageflip(drm_dev, manager->pipe);
646
647 out:
648 return IRQ_HANDLED;
649 }
650
651 static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
652 {
653 DRM_DEBUG_KMS("%s\n", __FILE__);
654
655 /*
656 * enable drm irq mode.
657 * - with irq_enabled = 1, we can use the vblank feature.
658 *
659 * P.S. note that we wouldn't use drm irq handler but
660 * just specific driver own one instead because
661 * drm framework supports only one irq handler.
662 */
663 drm_dev->irq_enabled = 1;
664
665 /*
666 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
667 * by drm timer once a current process gives up ownership of
668 * vblank event.(after drm_vblank_put function is called)
669 */
670 drm_dev->vblank_disable_allowed = 1;
671
672 return 0;
673 }
674
675 static void fimd_subdrv_remove(struct drm_device *drm_dev)
676 {
677 DRM_DEBUG_KMS("%s\n", __FILE__);
678
679 /* TODO. */
680 }
681
682 static int fimd_calc_clkdiv(struct fimd_context *ctx,
683 struct fb_videomode *timing)
684 {
685 unsigned long clk = clk_get_rate(ctx->lcd_clk);
686 u32 retrace;
687 u32 clkdiv;
688 u32 best_framerate = 0;
689 u32 framerate;
690
691 DRM_DEBUG_KMS("%s\n", __FILE__);
692
693 retrace = timing->left_margin + timing->hsync_len +
694 timing->right_margin + timing->xres;
695 retrace *= timing->upper_margin + timing->vsync_len +
696 timing->lower_margin + timing->yres;
697
698 /* default framerate is 60Hz */
699 if (!timing->refresh)
700 timing->refresh = 60;
701
702 clk /= retrace;
703
704 for (clkdiv = 1; clkdiv < 0x100; clkdiv++) {
705 int tmp;
706
707 /* get best framerate */
708 framerate = clk / clkdiv;
709 tmp = timing->refresh - framerate;
710 if (tmp < 0) {
711 best_framerate = framerate;
712 continue;
713 } else {
714 if (!best_framerate)
715 best_framerate = framerate;
716 else if (tmp < (best_framerate - framerate))
717 best_framerate = framerate;
718 break;
719 }
720 }
721
722 return clkdiv;
723 }
724
725 static void fimd_clear_win(struct fimd_context *ctx, int win)
726 {
727 u32 val;
728
729 DRM_DEBUG_KMS("%s\n", __FILE__);
730
731 writel(0, ctx->regs + WINCON(win));
732 writel(0, ctx->regs + VIDOSD_A(win));
733 writel(0, ctx->regs + VIDOSD_B(win));
734 writel(0, ctx->regs + VIDOSD_C(win));
735
736 if (win == 1 || win == 2)
737 writel(0, ctx->regs + VIDOSD_D(win));
738
739 val = readl(ctx->regs + SHADOWCON);
740 val &= ~SHADOWCON_WINx_PROTECT(win);
741 writel(val, ctx->regs + SHADOWCON);
742 }
743
744 static int fimd_power_on(struct fimd_context *ctx, bool enable)
745 {
746 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
747 struct device *dev = subdrv->manager.dev;
748
749 DRM_DEBUG_KMS("%s\n", __FILE__);
750
751 if (enable != false && enable != true)
752 return -EINVAL;
753
754 if (enable) {
755 int ret;
756
757 ret = clk_enable(ctx->bus_clk);
758 if (ret < 0)
759 return ret;
760
761 ret = clk_enable(ctx->lcd_clk);
762 if (ret < 0) {
763 clk_disable(ctx->bus_clk);
764 return ret;
765 }
766
767 ctx->suspended = false;
768
769 /* if vblank was enabled status, enable it again. */
770 if (test_and_clear_bit(0, &ctx->irq_flags))
771 fimd_enable_vblank(dev);
772
773 fimd_apply(dev);
774 } else {
775 clk_disable(ctx->lcd_clk);
776 clk_disable(ctx->bus_clk);
777
778 ctx->suspended = true;
779 }
780
781 return 0;
782 }
783
784 static int __devinit fimd_probe(struct platform_device *pdev)
785 {
786 struct device *dev = &pdev->dev;
787 struct fimd_context *ctx;
788 struct exynos_drm_subdrv *subdrv;
789 struct exynos_drm_fimd_pdata *pdata;
790 struct exynos_drm_panel_info *panel;
791 struct resource *res;
792 int win;
793 int ret = -EINVAL;
794
795 DRM_DEBUG_KMS("%s\n", __FILE__);
796
797 pdata = pdev->dev.platform_data;
798 if (!pdata) {
799 dev_err(dev, "no platform data specified\n");
800 return -EINVAL;
801 }
802
803 panel = &pdata->panel;
804 if (!panel) {
805 dev_err(dev, "panel is null.\n");
806 return -EINVAL;
807 }
808
809 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
810 if (!ctx)
811 return -ENOMEM;
812
813 ctx->bus_clk = clk_get(dev, "fimd");
814 if (IS_ERR(ctx->bus_clk)) {
815 dev_err(dev, "failed to get bus clock\n");
816 ret = PTR_ERR(ctx->bus_clk);
817 goto err_clk_get;
818 }
819
820 ctx->lcd_clk = clk_get(dev, "sclk_fimd");
821 if (IS_ERR(ctx->lcd_clk)) {
822 dev_err(dev, "failed to get lcd clock\n");
823 ret = PTR_ERR(ctx->lcd_clk);
824 goto err_bus_clk;
825 }
826
827 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
828 if (!res) {
829 dev_err(dev, "failed to find registers\n");
830 ret = -ENOENT;
831 goto err_clk;
832 }
833
834 ctx->regs_res = request_mem_region(res->start, resource_size(res),
835 dev_name(dev));
836 if (!ctx->regs_res) {
837 dev_err(dev, "failed to claim register region\n");
838 ret = -ENOENT;
839 goto err_clk;
840 }
841
842 ctx->regs = ioremap(res->start, resource_size(res));
843 if (!ctx->regs) {
844 dev_err(dev, "failed to map registers\n");
845 ret = -ENXIO;
846 goto err_req_region_io;
847 }
848
849 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
850 if (!res) {
851 dev_err(dev, "irq request failed.\n");
852 goto err_req_region_irq;
853 }
854
855 ctx->irq = res->start;
856
857 ret = request_irq(ctx->irq, fimd_irq_handler, 0, "drm_fimd", ctx);
858 if (ret < 0) {
859 dev_err(dev, "irq request failed.\n");
860 goto err_req_irq;
861 }
862
863 ctx->vidcon0 = pdata->vidcon0;
864 ctx->vidcon1 = pdata->vidcon1;
865 ctx->default_win = pdata->default_win;
866 ctx->panel = panel;
867
868 subdrv = &ctx->subdrv;
869
870 subdrv->probe = fimd_subdrv_probe;
871 subdrv->remove = fimd_subdrv_remove;
872 subdrv->manager.pipe = -1;
873 subdrv->manager.ops = &fimd_manager_ops;
874 subdrv->manager.overlay_ops = &fimd_overlay_ops;
875 subdrv->manager.display_ops = &fimd_display_ops;
876 subdrv->manager.dev = dev;
877
878 mutex_init(&ctx->lock);
879
880 platform_set_drvdata(pdev, ctx);
881
882 pm_runtime_enable(dev);
883 pm_runtime_get_sync(dev);
884
885 ctx->clkdiv = fimd_calc_clkdiv(ctx, &panel->timing);
886 panel->timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv;
887
888 DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n",
889 panel->timing.pixclock, ctx->clkdiv);
890
891 for (win = 0; win < WINDOWS_NR; win++)
892 fimd_clear_win(ctx, win);
893
894 exynos_drm_subdrv_register(subdrv);
895
896 return 0;
897
898 err_req_irq:
899 err_req_region_irq:
900 iounmap(ctx->regs);
901
902 err_req_region_io:
903 release_resource(ctx->regs_res);
904 kfree(ctx->regs_res);
905
906 err_clk:
907 clk_disable(ctx->lcd_clk);
908 clk_put(ctx->lcd_clk);
909
910 err_bus_clk:
911 clk_disable(ctx->bus_clk);
912 clk_put(ctx->bus_clk);
913
914 err_clk_get:
915 kfree(ctx);
916 return ret;
917 }
918
919 static int __devexit fimd_remove(struct platform_device *pdev)
920 {
921 struct device *dev = &pdev->dev;
922 struct fimd_context *ctx = platform_get_drvdata(pdev);
923
924 DRM_DEBUG_KMS("%s\n", __FILE__);
925
926 exynos_drm_subdrv_unregister(&ctx->subdrv);
927
928 if (ctx->suspended)
929 goto out;
930
931 clk_disable(ctx->lcd_clk);
932 clk_disable(ctx->bus_clk);
933
934 pm_runtime_set_suspended(dev);
935 pm_runtime_put_sync(dev);
936
937 out:
938 pm_runtime_disable(dev);
939
940 clk_put(ctx->lcd_clk);
941 clk_put(ctx->bus_clk);
942
943 iounmap(ctx->regs);
944 release_resource(ctx->regs_res);
945 kfree(ctx->regs_res);
946 free_irq(ctx->irq, ctx);
947
948 kfree(ctx);
949
950 return 0;
951 }
952
953 #ifdef CONFIG_PM_SLEEP
954 static int fimd_suspend(struct device *dev)
955 {
956 struct fimd_context *ctx = get_fimd_context(dev);
957
958 if (pm_runtime_suspended(dev))
959 return 0;
960
961 /*
962 * do not use pm_runtime_suspend(). if pm_runtime_suspend() is
963 * called here, an error would be returned by that interface
964 * because the usage_count of pm runtime is more than 1.
965 */
966 return fimd_power_on(ctx, false);
967 }
968
969 static int fimd_resume(struct device *dev)
970 {
971 struct fimd_context *ctx = get_fimd_context(dev);
972
973 /*
974 * if entered to sleep when lcd panel was on, the usage_count
975 * of pm runtime would still be 1 so in this case, fimd driver
976 * should be on directly not drawing on pm runtime interface.
977 */
978 if (!pm_runtime_suspended(dev))
979 return fimd_power_on(ctx, true);
980
981 return 0;
982 }
983 #endif
984
985 #ifdef CONFIG_PM_RUNTIME
986 static int fimd_runtime_suspend(struct device *dev)
987 {
988 struct fimd_context *ctx = get_fimd_context(dev);
989
990 DRM_DEBUG_KMS("%s\n", __FILE__);
991
992 return fimd_power_on(ctx, false);
993 }
994
995 static int fimd_runtime_resume(struct device *dev)
996 {
997 struct fimd_context *ctx = get_fimd_context(dev);
998
999 DRM_DEBUG_KMS("%s\n", __FILE__);
1000
1001 return fimd_power_on(ctx, true);
1002 }
1003 #endif
1004
1005 static const struct dev_pm_ops fimd_pm_ops = {
1006 SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume)
1007 SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL)
1008 };
1009
1010 static struct platform_driver fimd_driver = {
1011 .probe = fimd_probe,
1012 .remove = __devexit_p(fimd_remove),
1013 .driver = {
1014 .name = "exynos4-fb",
1015 .owner = THIS_MODULE,
1016 .pm = &fimd_pm_ops,
1017 },
1018 };
1019
1020 static int __init fimd_init(void)
1021 {
1022 return platform_driver_register(&fimd_driver);
1023 }
1024
1025 static void __exit fimd_exit(void)
1026 {
1027 platform_driver_unregister(&fimd_driver);
1028 }
1029
1030 module_init(fimd_init);
1031 module_exit(fimd_exit);
1032
1033 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1034 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
1035 MODULE_DESCRIPTION("Samsung DRM FIMD Driver");
1036 MODULE_LICENSE("GPL");