some platform could be entering to sleep after short time once lcd panel off but before that vblank could be off by vblank off delay feature. at that time, vblank doesn't have the pair between vblank_get/put. so this path makes vblank off delay to have enough.
Signed-off-by: Inki Dae inki.dae@samsung.com --- drivers/gpu/drm/exynos/exynos_drm_drv.c | 4 ++++ drivers/gpu/drm/exynos/exynos_drm_drv.h | 2 ++ 2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c index 1410720..35889ca 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c @@ -44,6 +44,8 @@ #define DRIVER_MAJOR 1 #define DRIVER_MINOR 0
+#define VBLANK_OFF_DELAY 50000 + static int exynos_drm_load(struct drm_device *dev, unsigned long flags) { struct exynos_drm_private *private; @@ -107,6 +109,8 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags) goto err_drm_device; }
+ drm_vblank_offdelay = VBLANK_OFF_DELAY; + return 0;
err_drm_device: diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h index 24f4ef4..e685e1e 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h @@ -41,6 +41,8 @@ struct drm_device; struct exynos_drm_overlay; struct drm_connector;
+extern unsigned int drm_vblank_offdelay; + /* this enumerates display type. */ enum exynos_drm_output_type { EXYNOS_DISPLAY_TYPE_NONE,