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- From 9a1a810516ae9cb3259b898b6879901c5b44fa90 Mon Sep 17 00:00:00 2001
- From: Prathap M S <msprathap@ti.com>
- Date: Mon, 2 Sep 2013 12:05:23 +0530
- Subject: [PATCH 343/752] video: da8xx-fb: Add API to register wait for vsync
- callback
- This patch adds APIs to register and unregister wait for vsync callback.
- This is derived from commit id 2d44302545da24fd22912d964102bc31a7489e97
- This commit id was part of 3.2 kernel sources.
- Signed-off-by: Prathap M S <msprathap@ti.com>
- ---
- drivers/video/fbdev/da8xx-fb.c | 33 +++++++++++++++++++++++++++++++++
- include/video/da8xx-fb.h | 4 ++++
- 2 files changed, 37 insertions(+)
- --- a/drivers/video/fbdev/da8xx-fb.c
- +++ b/drivers/video/fbdev/da8xx-fb.c
- @@ -197,6 +197,9 @@ static struct fb_fix_screeninfo da8xx_fb
- .accel = FB_ACCEL_NONE
- };
-
- +static vsync_callback_t vsync_cb_handler;
- +static void *vsync_cb_arg;
- +
- static struct fb_videomode known_lcd_panels[] = {
- /* Sharp LCD035Q3DG01 */
- [0] = {
- @@ -831,6 +834,32 @@ static int lcd_init(struct da8xx_fb_par
- return 0;
- }
-
- +int register_vsync_cb(vsync_callback_t handler, void *arg, int idx)
- +{
- + if ((vsync_cb_handler == NULL) && (vsync_cb_arg == NULL)) {
- + vsync_cb_arg = arg;
- + vsync_cb_handler = handler;
- + } else {
- + return -EEXIST;
- + }
- +
- + return 0;
- +}
- +EXPORT_SYMBOL(register_vsync_cb);
- +
- +int unregister_vsync_cb(vsync_callback_t handler, void *arg, int idx)
- +{
- + if ((vsync_cb_handler == handler) && (vsync_cb_arg == arg)) {
- + vsync_cb_handler = NULL;
- + vsync_cb_arg = NULL;
- + } else {
- + return -ENXIO;
- + }
- +
- + return 0;
- +}
- +EXPORT_SYMBOL(unregister_vsync_cb);
- +
- /* IRQ handler for version 2 of LCDC */
- static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
- {
- @@ -868,6 +897,8 @@ static irqreturn_t lcdc_irq_handler_rev0
- LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
- par->vsync_flag = 1;
- wake_up_interruptible(&par->vsync_wait);
- + if (vsync_cb_handler)
- + vsync_cb_handler(vsync_cb_arg);
- }
-
- if (stat & LCD_END_OF_FRAME1) {
- @@ -943,6 +974,8 @@ static irqreturn_t lcdc_irq_handler_rev0
- LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
- par->vsync_flag = 1;
- wake_up_interruptible(&par->vsync_wait);
- + if (vsync_cb_handler)
- + vsync_cb_handler(vsync_cb_arg);
- }
- }
-
- --- a/include/video/da8xx-fb.h
- +++ b/include/video/da8xx-fb.h
- @@ -91,5 +91,9 @@ struct lcd_sync_arg {
- /* Proprietary FB_SYNC_ flags */
- #define FB_SYNC_CLK_INVERT 0x40000000
-
- +typedef void (*vsync_callback_t)(void *arg);
- +int register_vsync_cb(vsync_callback_t handler, void *arg, int idx);
- +int unregister_vsync_cb(vsync_callback_t handler, void *arg, int idx);
- +
- #endif /* ifndef DA8XX_FB_H */
-
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