From daae33d9070f0f4a22734ae49c20fdf70f05a0f9 Mon Sep 17 00:00:00 2001 From: Robert Nelson Date: Wed, 18 Dec 2013 12:05:16 -0600 Subject: [PATCH 4/5] hack: port da8xx changes from ti 3.12 repo Signed-off-by: Robert Nelson --- drivers/video/da8xx-fb.c | 33 +++++++++++++++++++++++++++++++++ include/video/da8xx-fb.h | 4 ++++ 2 files changed, 37 insertions(+) Index: linux-3.12.36-rt50-r4s2/drivers/video/da8xx-fb.c =================================================================== --- linux-3.12.36-rt50-r4s2.orig/drivers/video/da8xx-fb.c +++ linux-3.12.36-rt50-r4s2/drivers/video/da8xx-fb.c @@ -198,6 +198,9 @@ 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] = { @@ -825,6 +828,32 @@ 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) { @@ -862,6 +891,8 @@ 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) { @@ -872,6 +903,8 @@ 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); } /* Set only when controller is disabled and at the end of Index: linux-3.12.36-rt50-r4s2/include/video/da8xx-fb.h =================================================================== --- linux-3.12.36-rt50-r4s2.orig/include/video/da8xx-fb.h +++ linux-3.12.36-rt50-r4s2/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 */