omap: start working on 3.18 support

[openwrt.git] / target / linux / omap / patches-3.18 / 0343-video-da8xx-fb-Add-API-to-register-wait-for-vsync-ca.patch

diff --git a/target/linux/omap/patches-3.18/0343-video-da8xx-fb-Add-API-to-register-wait-for-vsync-ca.patch b/target/linux/omap/patches-3.18/0343-video-da8xx-fb-Add-API-to-register-wait-for-vsync-ca.patch
new file mode 100644 (file)
index 0000000..8c0898a
--- /dev/null
+++ b/target/linux/omap/patches-3.18/0343-video-da8xx-fb-Add-API-to-register-wait-for-vsync-ca.patch
@@ -0,0 +1,91 @@
+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 */
+