3 * Copyright (C) 2011 Samsung Electronics Co.Ltd
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Inki Dae <inki.dae@samsung.com>
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.
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>
22 #include <drm/exynos_drm.h>
23 #include <plat/regs-fb-v4.h>
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_fbdev.h"
27 #include "exynos_drm_crtc.h"
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
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)
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)
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))
55 /* FIMD has totally five hardware windows. */
58 #define get_fimd_context(dev) platform_get_drvdata(to_platform_device(dev))
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
;
70 unsigned int buf_offsize
;
71 unsigned int line_size
; /* bytes */
76 struct exynos_drm_subdrv subdrv
;
78 struct drm_crtc
*crtc
;
82 struct fimd_win_data win_data
[WINDOWS_NR
];
84 unsigned int default_win
;
85 unsigned long irq_flags
;
91 struct exynos_drm_panel_info
*panel
;
94 static bool fimd_display_is_connected(struct device
*dev
)
96 DRM_DEBUG_KMS("%s\n", __FILE__
);
103 static void *fimd_get_panel(struct device
*dev
)
105 struct fimd_context
*ctx
= get_fimd_context(dev
);
107 DRM_DEBUG_KMS("%s\n", __FILE__
);
112 static int fimd_check_timing(struct device
*dev
, void *timing
)
114 DRM_DEBUG_KMS("%s\n", __FILE__
);
121 static int fimd_display_power_on(struct device
*dev
, int mode
)
123 DRM_DEBUG_KMS("%s\n", __FILE__
);
130 static struct exynos_drm_display_ops fimd_display_ops
= {
131 .type
= EXYNOS_DISPLAY_TYPE_LCD
,
132 .is_connected
= fimd_display_is_connected
,
133 .get_panel
= fimd_get_panel
,
134 .check_timing
= fimd_check_timing
,
135 .power_on
= fimd_display_power_on
,
138 static void fimd_dpms(struct device
*subdrv_dev
, int mode
)
140 struct fimd_context
*ctx
= get_fimd_context(subdrv_dev
);
142 DRM_DEBUG_KMS("%s, %d\n", __FILE__
, mode
);
144 mutex_lock(&ctx
->lock
);
147 case DRM_MODE_DPMS_ON
:
149 * enable fimd hardware only if suspended status.
151 * P.S. fimd_dpms function would be called at booting time so
152 * clk_enable could be called double time.
155 pm_runtime_get_sync(subdrv_dev
);
157 case DRM_MODE_DPMS_STANDBY
:
158 case DRM_MODE_DPMS_SUSPEND
:
159 case DRM_MODE_DPMS_OFF
:
161 pm_runtime_put_sync(subdrv_dev
);
164 DRM_DEBUG_KMS("unspecified mode %d\n", mode
);
168 mutex_unlock(&ctx
->lock
);
171 static void fimd_apply(struct device
*subdrv_dev
)
173 struct fimd_context
*ctx
= get_fimd_context(subdrv_dev
);
174 struct exynos_drm_manager
*mgr
= ctx
->subdrv
.manager
;
175 struct exynos_drm_manager_ops
*mgr_ops
= mgr
->ops
;
176 struct exynos_drm_overlay_ops
*ovl_ops
= mgr
->overlay_ops
;
177 struct fimd_win_data
*win_data
;
180 DRM_DEBUG_KMS("%s\n", __FILE__
);
182 for (i
= 0; i
< WINDOWS_NR
; i
++) {
183 win_data
= &ctx
->win_data
[i
];
184 if (win_data
->enabled
&& (ovl_ops
&& ovl_ops
->commit
))
185 ovl_ops
->commit(subdrv_dev
, i
);
188 if (mgr_ops
&& mgr_ops
->commit
)
189 mgr_ops
->commit(subdrv_dev
);
192 static void fimd_commit(struct device
*dev
)
194 struct fimd_context
*ctx
= get_fimd_context(dev
);
195 struct exynos_drm_panel_info
*panel
= ctx
->panel
;
196 struct fb_videomode
*timing
= &panel
->timing
;
202 DRM_DEBUG_KMS("%s\n", __FILE__
);
204 /* setup polarity values from machine code. */
205 writel(ctx
->vidcon1
, ctx
->regs
+ VIDCON1
);
207 /* setup vertical timing values. */
208 val
= VIDTCON0_VBPD(timing
->upper_margin
- 1) |
209 VIDTCON0_VFPD(timing
->lower_margin
- 1) |
210 VIDTCON0_VSPW(timing
->vsync_len
- 1);
211 writel(val
, ctx
->regs
+ VIDTCON0
);
213 /* setup horizontal timing values. */
214 val
= VIDTCON1_HBPD(timing
->left_margin
- 1) |
215 VIDTCON1_HFPD(timing
->right_margin
- 1) |
216 VIDTCON1_HSPW(timing
->hsync_len
- 1);
217 writel(val
, ctx
->regs
+ VIDTCON1
);
219 /* setup horizontal and vertical display size. */
220 val
= VIDTCON2_LINEVAL(timing
->yres
- 1) |
221 VIDTCON2_HOZVAL(timing
->xres
- 1);
222 writel(val
, ctx
->regs
+ VIDTCON2
);
224 /* setup clock source, clock divider, enable dma. */
226 val
&= ~(VIDCON0_CLKVAL_F_MASK
| VIDCON0_CLKDIR
);
229 val
|= VIDCON0_CLKVAL_F(ctx
->clkdiv
- 1) | VIDCON0_CLKDIR
;
231 val
&= ~VIDCON0_CLKDIR
; /* 1:1 clock */
234 * fields of register with prefix '_F' would be updated
235 * at vsync(same as dma start)
237 val
|= VIDCON0_ENVID
| VIDCON0_ENVID_F
;
238 writel(val
, ctx
->regs
+ VIDCON0
);
241 static int fimd_enable_vblank(struct device
*dev
)
243 struct fimd_context
*ctx
= get_fimd_context(dev
);
246 DRM_DEBUG_KMS("%s\n", __FILE__
);
251 if (!test_and_set_bit(0, &ctx
->irq_flags
)) {
252 val
= readl(ctx
->regs
+ VIDINTCON0
);
254 val
|= VIDINTCON0_INT_ENABLE
;
255 val
|= VIDINTCON0_INT_FRAME
;
257 val
&= ~VIDINTCON0_FRAMESEL0_MASK
;
258 val
|= VIDINTCON0_FRAMESEL0_VSYNC
;
259 val
&= ~VIDINTCON0_FRAMESEL1_MASK
;
260 val
|= VIDINTCON0_FRAMESEL1_NONE
;
262 writel(val
, ctx
->regs
+ VIDINTCON0
);
268 static void fimd_disable_vblank(struct device
*dev
)
270 struct fimd_context
*ctx
= get_fimd_context(dev
);
273 DRM_DEBUG_KMS("%s\n", __FILE__
);
278 if (test_and_clear_bit(0, &ctx
->irq_flags
)) {
279 val
= readl(ctx
->regs
+ VIDINTCON0
);
281 val
&= ~VIDINTCON0_INT_FRAME
;
282 val
&= ~VIDINTCON0_INT_ENABLE
;
284 writel(val
, ctx
->regs
+ VIDINTCON0
);
288 static struct exynos_drm_manager_ops fimd_manager_ops
= {
291 .commit
= fimd_commit
,
292 .enable_vblank
= fimd_enable_vblank
,
293 .disable_vblank
= fimd_disable_vblank
,
296 static void fimd_win_mode_set(struct device
*dev
,
297 struct exynos_drm_overlay
*overlay
)
299 struct fimd_context
*ctx
= get_fimd_context(dev
);
300 struct fimd_win_data
*win_data
;
302 unsigned long offset
;
304 DRM_DEBUG_KMS("%s\n", __FILE__
);
307 dev_err(dev
, "overlay is NULL\n");
312 if (win
== DEFAULT_ZPOS
)
313 win
= ctx
->default_win
;
315 if (win
< 0 || win
> WINDOWS_NR
)
318 offset
= overlay
->fb_x
* (overlay
->bpp
>> 3);
319 offset
+= overlay
->fb_y
* overlay
->pitch
;
321 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset
, overlay
->pitch
);
323 win_data
= &ctx
->win_data
[win
];
325 win_data
->offset_x
= overlay
->crtc_x
;
326 win_data
->offset_y
= overlay
->crtc_y
;
327 win_data
->ovl_width
= overlay
->crtc_width
;
328 win_data
->ovl_height
= overlay
->crtc_height
;
329 win_data
->fb_width
= overlay
->fb_width
;
330 win_data
->fb_height
= overlay
->fb_height
;
331 win_data
->dma_addr
= overlay
->dma_addr
[0] + offset
;
332 win_data
->vaddr
= overlay
->vaddr
[0] + offset
;
333 win_data
->bpp
= overlay
->bpp
;
334 win_data
->buf_offsize
= (overlay
->fb_width
- overlay
->crtc_width
) *
336 win_data
->line_size
= overlay
->crtc_width
* (overlay
->bpp
>> 3);
338 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
339 win_data
->offset_x
, win_data
->offset_y
);
340 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
341 win_data
->ovl_width
, win_data
->ovl_height
);
342 DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
343 (unsigned long)win_data
->dma_addr
,
344 (unsigned long)win_data
->vaddr
);
345 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
346 overlay
->fb_width
, overlay
->crtc_width
);
349 static void fimd_win_set_pixfmt(struct device
*dev
, unsigned int win
)
351 struct fimd_context
*ctx
= get_fimd_context(dev
);
352 struct fimd_win_data
*win_data
= &ctx
->win_data
[win
];
355 DRM_DEBUG_KMS("%s\n", __FILE__
);
359 switch (win_data
->bpp
) {
361 val
|= WINCON0_BPPMODE_1BPP
;
362 val
|= WINCONx_BITSWP
;
363 val
|= WINCONx_BURSTLEN_4WORD
;
366 val
|= WINCON0_BPPMODE_2BPP
;
367 val
|= WINCONx_BITSWP
;
368 val
|= WINCONx_BURSTLEN_8WORD
;
371 val
|= WINCON0_BPPMODE_4BPP
;
372 val
|= WINCONx_BITSWP
;
373 val
|= WINCONx_BURSTLEN_8WORD
;
376 val
|= WINCON0_BPPMODE_8BPP_PALETTE
;
377 val
|= WINCONx_BURSTLEN_8WORD
;
378 val
|= WINCONx_BYTSWP
;
381 val
|= WINCON0_BPPMODE_16BPP_565
;
382 val
|= WINCONx_HAWSWP
;
383 val
|= WINCONx_BURSTLEN_16WORD
;
386 val
|= WINCON0_BPPMODE_24BPP_888
;
388 val
|= WINCONx_BURSTLEN_16WORD
;
391 val
|= WINCON1_BPPMODE_28BPP_A4888
392 | WINCON1_BLD_PIX
| WINCON1_ALPHA_SEL
;
394 val
|= WINCONx_BURSTLEN_16WORD
;
397 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
399 val
|= WINCON0_BPPMODE_24BPP_888
;
401 val
|= WINCONx_BURSTLEN_16WORD
;
405 DRM_DEBUG_KMS("bpp = %d\n", win_data
->bpp
);
407 writel(val
, ctx
->regs
+ WINCON(win
));
410 static void fimd_win_set_colkey(struct device
*dev
, unsigned int win
)
412 struct fimd_context
*ctx
= get_fimd_context(dev
);
413 unsigned int keycon0
= 0, keycon1
= 0;
415 DRM_DEBUG_KMS("%s\n", __FILE__
);
417 keycon0
= ~(WxKEYCON0_KEYBL_EN
| WxKEYCON0_KEYEN_F
|
418 WxKEYCON0_DIRCON
) | WxKEYCON0_COMPKEY(0);
420 keycon1
= WxKEYCON1_COLVAL(0xffffffff);
422 writel(keycon0
, ctx
->regs
+ WKEYCON0_BASE(win
));
423 writel(keycon1
, ctx
->regs
+ WKEYCON1_BASE(win
));
426 static void fimd_win_commit(struct device
*dev
, int zpos
)
428 struct fimd_context
*ctx
= get_fimd_context(dev
);
429 struct fimd_win_data
*win_data
;
431 unsigned long val
, alpha
, size
;
433 DRM_DEBUG_KMS("%s\n", __FILE__
);
438 if (win
== DEFAULT_ZPOS
)
439 win
= ctx
->default_win
;
441 if (win
< 0 || win
> WINDOWS_NR
)
444 win_data
= &ctx
->win_data
[win
];
447 * SHADOWCON register is used for enabling timing.
449 * for example, once only width value of a register is set,
450 * if the dma is started then fimd hardware could malfunction so
451 * with protect window setting, the register fields with prefix '_F'
452 * wouldn't be updated at vsync also but updated once unprotect window
456 /* protect windows */
457 val
= readl(ctx
->regs
+ SHADOWCON
);
458 val
|= SHADOWCON_WINx_PROTECT(win
);
459 writel(val
, ctx
->regs
+ SHADOWCON
);
461 /* buffer start address */
462 val
= (unsigned long)win_data
->dma_addr
;
463 writel(val
, ctx
->regs
+ VIDWx_BUF_START(win
, 0));
465 /* buffer end address */
466 size
= win_data
->fb_width
* win_data
->ovl_height
* (win_data
->bpp
>> 3);
467 val
= (unsigned long)(win_data
->dma_addr
+ size
);
468 writel(val
, ctx
->regs
+ VIDWx_BUF_END(win
, 0));
470 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
471 (unsigned long)win_data
->dma_addr
, val
, size
);
472 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
473 win_data
->ovl_width
, win_data
->ovl_height
);
476 val
= VIDW_BUF_SIZE_OFFSET(win_data
->buf_offsize
) |
477 VIDW_BUF_SIZE_PAGEWIDTH(win_data
->line_size
);
478 writel(val
, ctx
->regs
+ VIDWx_BUF_SIZE(win
, 0));
481 val
= VIDOSDxA_TOPLEFT_X(win_data
->offset_x
) |
482 VIDOSDxA_TOPLEFT_Y(win_data
->offset_y
);
483 writel(val
, ctx
->regs
+ VIDOSD_A(win
));
485 val
= VIDOSDxB_BOTRIGHT_X(win_data
->offset_x
+
486 win_data
->ovl_width
- 1) |
487 VIDOSDxB_BOTRIGHT_Y(win_data
->offset_y
+
488 win_data
->ovl_height
- 1);
489 writel(val
, ctx
->regs
+ VIDOSD_B(win
));
491 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
492 win_data
->offset_x
, win_data
->offset_y
,
493 win_data
->offset_x
+ win_data
->ovl_width
- 1,
494 win_data
->offset_y
+ win_data
->ovl_height
- 1);
496 /* hardware window 0 doesn't support alpha channel. */
499 alpha
= VIDISD14C_ALPHA1_R(0xf) |
500 VIDISD14C_ALPHA1_G(0xf) |
501 VIDISD14C_ALPHA1_B(0xf);
503 writel(alpha
, ctx
->regs
+ VIDOSD_C(win
));
507 if (win
!= 3 && win
!= 4) {
508 u32 offset
= VIDOSD_D(win
);
510 offset
= VIDOSD_C_SIZE_W0
;
511 val
= win_data
->ovl_width
* win_data
->ovl_height
;
512 writel(val
, ctx
->regs
+ offset
);
514 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val
);
517 fimd_win_set_pixfmt(dev
, win
);
519 /* hardware window 0 doesn't support color key. */
521 fimd_win_set_colkey(dev
, win
);
524 val
= readl(ctx
->regs
+ WINCON(win
));
525 val
|= WINCONx_ENWIN
;
526 writel(val
, ctx
->regs
+ WINCON(win
));
528 /* Enable DMA channel and unprotect windows */
529 val
= readl(ctx
->regs
+ SHADOWCON
);
530 val
|= SHADOWCON_CHx_ENABLE(win
);
531 val
&= ~SHADOWCON_WINx_PROTECT(win
);
532 writel(val
, ctx
->regs
+ SHADOWCON
);
534 win_data
->enabled
= true;
537 static void fimd_win_disable(struct device
*dev
, int zpos
)
539 struct fimd_context
*ctx
= get_fimd_context(dev
);
540 struct fimd_win_data
*win_data
;
544 DRM_DEBUG_KMS("%s\n", __FILE__
);
546 if (win
== DEFAULT_ZPOS
)
547 win
= ctx
->default_win
;
549 if (win
< 0 || win
> WINDOWS_NR
)
552 win_data
= &ctx
->win_data
[win
];
554 /* protect windows */
555 val
= readl(ctx
->regs
+ SHADOWCON
);
556 val
|= SHADOWCON_WINx_PROTECT(win
);
557 writel(val
, ctx
->regs
+ SHADOWCON
);
560 val
= readl(ctx
->regs
+ WINCON(win
));
561 val
&= ~WINCONx_ENWIN
;
562 writel(val
, ctx
->regs
+ WINCON(win
));
564 /* unprotect windows */
565 val
= readl(ctx
->regs
+ SHADOWCON
);
566 val
&= ~SHADOWCON_CHx_ENABLE(win
);
567 val
&= ~SHADOWCON_WINx_PROTECT(win
);
568 writel(val
, ctx
->regs
+ SHADOWCON
);
570 win_data
->enabled
= false;
573 static struct exynos_drm_overlay_ops fimd_overlay_ops
= {
574 .mode_set
= fimd_win_mode_set
,
575 .commit
= fimd_win_commit
,
576 .disable
= fimd_win_disable
,
579 static struct exynos_drm_manager fimd_manager
= {
581 .ops
= &fimd_manager_ops
,
582 .overlay_ops
= &fimd_overlay_ops
,
583 .display_ops
= &fimd_display_ops
,
586 static void fimd_finish_pageflip(struct drm_device
*drm_dev
, int crtc
)
588 struct exynos_drm_private
*dev_priv
= drm_dev
->dev_private
;
589 struct drm_pending_vblank_event
*e
, *t
;
592 bool is_checked
= false;
594 spin_lock_irqsave(&drm_dev
->event_lock
, flags
);
596 list_for_each_entry_safe(e
, t
, &dev_priv
->pageflip_event_list
,
598 /* if event's pipe isn't same as crtc then ignore it. */
604 do_gettimeofday(&now
);
605 e
->event
.sequence
= 0;
606 e
->event
.tv_sec
= now
.tv_sec
;
607 e
->event
.tv_usec
= now
.tv_usec
;
609 list_move_tail(&e
->base
.link
, &e
->base
.file_priv
->event_list
);
610 wake_up_interruptible(&e
->base
.file_priv
->event_wait
);
615 * call drm_vblank_put only in case that drm_vblank_get was
618 if (atomic_read(&drm_dev
->vblank_refcount
[crtc
]) > 0)
619 drm_vblank_put(drm_dev
, crtc
);
622 * don't off vblank if vblank_disable_allowed is 1,
623 * because vblank would be off by timer handler.
625 if (!drm_dev
->vblank_disable_allowed
)
626 drm_vblank_off(drm_dev
, crtc
);
629 spin_unlock_irqrestore(&drm_dev
->event_lock
, flags
);
632 static irqreturn_t
fimd_irq_handler(int irq
, void *dev_id
)
634 struct fimd_context
*ctx
= (struct fimd_context
*)dev_id
;
635 struct exynos_drm_subdrv
*subdrv
= &ctx
->subdrv
;
636 struct drm_device
*drm_dev
= subdrv
->drm_dev
;
637 struct exynos_drm_manager
*manager
= subdrv
->manager
;
640 val
= readl(ctx
->regs
+ VIDINTCON1
);
642 if (val
& VIDINTCON1_INT_FRAME
)
643 /* VSYNC interrupt */
644 writel(VIDINTCON1_INT_FRAME
, ctx
->regs
+ VIDINTCON1
);
646 /* check the crtc is detached already from encoder */
647 if (manager
->pipe
< 0)
650 drm_handle_vblank(drm_dev
, manager
->pipe
);
651 fimd_finish_pageflip(drm_dev
, manager
->pipe
);
657 static int fimd_subdrv_probe(struct drm_device
*drm_dev
, struct device
*dev
)
659 DRM_DEBUG_KMS("%s\n", __FILE__
);
662 * enable drm irq mode.
663 * - with irq_enabled = 1, we can use the vblank feature.
665 * P.S. note that we wouldn't use drm irq handler but
666 * just specific driver own one instead because
667 * drm framework supports only one irq handler.
669 drm_dev
->irq_enabled
= 1;
672 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
673 * by drm timer once a current process gives up ownership of
674 * vblank event.(after drm_vblank_put function is called)
676 drm_dev
->vblank_disable_allowed
= 1;
681 static void fimd_subdrv_remove(struct drm_device
*drm_dev
)
683 DRM_DEBUG_KMS("%s\n", __FILE__
);
688 static int fimd_calc_clkdiv(struct fimd_context
*ctx
,
689 struct fb_videomode
*timing
)
691 unsigned long clk
= clk_get_rate(ctx
->lcd_clk
);
694 u32 best_framerate
= 0;
697 DRM_DEBUG_KMS("%s\n", __FILE__
);
699 retrace
= timing
->left_margin
+ timing
->hsync_len
+
700 timing
->right_margin
+ timing
->xres
;
701 retrace
*= timing
->upper_margin
+ timing
->vsync_len
+
702 timing
->lower_margin
+ timing
->yres
;
704 /* default framerate is 60Hz */
705 if (!timing
->refresh
)
706 timing
->refresh
= 60;
710 for (clkdiv
= 1; clkdiv
< 0x100; clkdiv
++) {
713 /* get best framerate */
714 framerate
= clk
/ clkdiv
;
715 tmp
= timing
->refresh
- framerate
;
717 best_framerate
= framerate
;
721 best_framerate
= framerate
;
722 else if (tmp
< (best_framerate
- framerate
))
723 best_framerate
= framerate
;
731 static void fimd_clear_win(struct fimd_context
*ctx
, int win
)
735 DRM_DEBUG_KMS("%s\n", __FILE__
);
737 writel(0, ctx
->regs
+ WINCON(win
));
738 writel(0, ctx
->regs
+ VIDOSD_A(win
));
739 writel(0, ctx
->regs
+ VIDOSD_B(win
));
740 writel(0, ctx
->regs
+ VIDOSD_C(win
));
742 if (win
== 1 || win
== 2)
743 writel(0, ctx
->regs
+ VIDOSD_D(win
));
745 val
= readl(ctx
->regs
+ SHADOWCON
);
746 val
&= ~SHADOWCON_WINx_PROTECT(win
);
747 writel(val
, ctx
->regs
+ SHADOWCON
);
750 static int fimd_power_on(struct fimd_context
*ctx
, bool enable
)
752 struct exynos_drm_subdrv
*subdrv
= &ctx
->subdrv
;
753 struct device
*dev
= subdrv
->dev
;
755 DRM_DEBUG_KMS("%s\n", __FILE__
);
757 if (enable
!= false && enable
!= true)
763 ret
= clk_enable(ctx
->bus_clk
);
767 ret
= clk_enable(ctx
->lcd_clk
);
769 clk_disable(ctx
->bus_clk
);
773 ctx
->suspended
= false;
775 /* if vblank was enabled status, enable it again. */
776 if (test_and_clear_bit(0, &ctx
->irq_flags
))
777 fimd_enable_vblank(dev
);
781 clk_disable(ctx
->lcd_clk
);
782 clk_disable(ctx
->bus_clk
);
784 ctx
->suspended
= true;
790 static int __devinit
fimd_probe(struct platform_device
*pdev
)
792 struct device
*dev
= &pdev
->dev
;
793 struct fimd_context
*ctx
;
794 struct exynos_drm_subdrv
*subdrv
;
795 struct exynos_drm_fimd_pdata
*pdata
;
796 struct exynos_drm_panel_info
*panel
;
797 struct resource
*res
;
801 DRM_DEBUG_KMS("%s\n", __FILE__
);
803 pdata
= pdev
->dev
.platform_data
;
805 dev_err(dev
, "no platform data specified\n");
809 panel
= &pdata
->panel
;
811 dev_err(dev
, "panel is null.\n");
815 ctx
= devm_kzalloc(&pdev
->dev
, sizeof(*ctx
), GFP_KERNEL
);
819 ctx
->bus_clk
= clk_get(dev
, "fimd");
820 if (IS_ERR(ctx
->bus_clk
)) {
821 dev_err(dev
, "failed to get bus clock\n");
822 ret
= PTR_ERR(ctx
->bus_clk
);
826 ctx
->lcd_clk
= clk_get(dev
, "sclk_fimd");
827 if (IS_ERR(ctx
->lcd_clk
)) {
828 dev_err(dev
, "failed to get lcd clock\n");
829 ret
= PTR_ERR(ctx
->lcd_clk
);
833 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
835 ctx
->regs
= devm_request_and_ioremap(&pdev
->dev
, res
);
837 dev_err(dev
, "failed to map registers\n");
842 res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
844 dev_err(dev
, "irq request failed.\n");
848 ctx
->irq
= res
->start
;
850 ret
= devm_request_irq(&pdev
->dev
, ctx
->irq
, fimd_irq_handler
,
853 dev_err(dev
, "irq request failed.\n");
857 ctx
->vidcon0
= pdata
->vidcon0
;
858 ctx
->vidcon1
= pdata
->vidcon1
;
859 ctx
->default_win
= pdata
->default_win
;
862 subdrv
= &ctx
->subdrv
;
865 subdrv
->manager
= &fimd_manager
;
866 subdrv
->probe
= fimd_subdrv_probe
;
867 subdrv
->remove
= fimd_subdrv_remove
;
869 mutex_init(&ctx
->lock
);
871 platform_set_drvdata(pdev
, ctx
);
873 pm_runtime_enable(dev
);
874 pm_runtime_get_sync(dev
);
876 ctx
->clkdiv
= fimd_calc_clkdiv(ctx
, &panel
->timing
);
877 panel
->timing
.pixclock
= clk_get_rate(ctx
->lcd_clk
) / ctx
->clkdiv
;
879 DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n",
880 panel
->timing
.pixclock
, ctx
->clkdiv
);
882 for (win
= 0; win
< WINDOWS_NR
; win
++)
883 fimd_clear_win(ctx
, win
);
885 exynos_drm_subdrv_register(subdrv
);
890 clk_disable(ctx
->lcd_clk
);
891 clk_put(ctx
->lcd_clk
);
894 clk_disable(ctx
->bus_clk
);
895 clk_put(ctx
->bus_clk
);
901 static int __devexit
fimd_remove(struct platform_device
*pdev
)
903 struct device
*dev
= &pdev
->dev
;
904 struct fimd_context
*ctx
= platform_get_drvdata(pdev
);
906 DRM_DEBUG_KMS("%s\n", __FILE__
);
908 exynos_drm_subdrv_unregister(&ctx
->subdrv
);
913 clk_disable(ctx
->lcd_clk
);
914 clk_disable(ctx
->bus_clk
);
916 pm_runtime_set_suspended(dev
);
917 pm_runtime_put_sync(dev
);
920 pm_runtime_disable(dev
);
922 clk_put(ctx
->lcd_clk
);
923 clk_put(ctx
->bus_clk
);
928 #ifdef CONFIG_PM_SLEEP
929 static int fimd_suspend(struct device
*dev
)
931 struct fimd_context
*ctx
= get_fimd_context(dev
);
933 if (pm_runtime_suspended(dev
))
937 * do not use pm_runtime_suspend(). if pm_runtime_suspend() is
938 * called here, an error would be returned by that interface
939 * because the usage_count of pm runtime is more than 1.
941 return fimd_power_on(ctx
, false);
944 static int fimd_resume(struct device
*dev
)
946 struct fimd_context
*ctx
= get_fimd_context(dev
);
949 * if entered to sleep when lcd panel was on, the usage_count
950 * of pm runtime would still be 1 so in this case, fimd driver
951 * should be on directly not drawing on pm runtime interface.
953 if (!pm_runtime_suspended(dev
))
954 return fimd_power_on(ctx
, true);
960 #ifdef CONFIG_PM_RUNTIME
961 static int fimd_runtime_suspend(struct device
*dev
)
963 struct fimd_context
*ctx
= get_fimd_context(dev
);
965 DRM_DEBUG_KMS("%s\n", __FILE__
);
967 return fimd_power_on(ctx
, false);
970 static int fimd_runtime_resume(struct device
*dev
)
972 struct fimd_context
*ctx
= get_fimd_context(dev
);
974 DRM_DEBUG_KMS("%s\n", __FILE__
);
976 return fimd_power_on(ctx
, true);
980 static const struct dev_pm_ops fimd_pm_ops
= {
981 SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend
, fimd_resume
)
982 SET_RUNTIME_PM_OPS(fimd_runtime_suspend
, fimd_runtime_resume
, NULL
)
985 struct platform_driver fimd_driver
= {
987 .remove
= __devexit_p(fimd_remove
),
989 .name
= "exynos4-fb",
990 .owner
= THIS_MODULE
,