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| author | Inki Dae <inki.dae@samsung.com> | 2012-08-20 19:55:14 +0900 |
|---|---|---|
| committer | Inki Dae <inki.dae@samsung.com> | 2012-10-04 10:05:59 +0900 |
| commit | b011941f0ffdefb87585d9ed786164037d0d50df (patch) | |
| tree | 5108a8c71a1177206a44e695d7a1f3d9e6709a10 /drivers/gpu/drm/exynos/exynos_drm_drv.h | |
| parent | 50caf25c583b938c681b61e64dac58da9b640f2f (diff) | |
| download | linux-3.10-b011941f0ffdefb87585d9ed786164037d0d50df.tar.gz linux-3.10-b011941f0ffdefb87585d9ed786164037d0d50df.tar.bz2 linux-3.10-b011941f0ffdefb87585d9ed786164037d0d50df.zip | |
drm/exynos: add wait_for_vblank callback interface.
Changelog v2:
fixed comments.
Changelog v1:
this interface can be used to make sure that hardware overlay is disabled
to avoid that memory region is accessed by dma after gem buffer was released.
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_drv.h')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_drv.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h index 24c45d86bab..eec77aa6962 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h @@ -37,6 +37,20 @@ #define MAX_FB_BUFFER 4 #define DEFAULT_ZPOS -1 +#define _wait_for(COND, MS) ({ \ + unsigned long timeout__ = jiffies + msecs_to_jiffies(MS); \ + int ret__ = 0; \ + while (!(COND)) { \ + if (time_after(jiffies, timeout__)) { \ + ret__ = -ETIMEDOUT; \ + break; \ + } \ + } \ + ret__; \ +}) + +#define wait_for(COND, MS) _wait_for(COND, MS) + struct drm_device; struct exynos_drm_overlay; struct drm_connector; @@ -61,6 +75,8 @@ enum exynos_drm_output_type { * @commit: apply hardware specific overlay data to registers. * @enable: enable hardware specific overlay. * @disable: disable hardware specific overlay. + * @wait_for_vblank: wait for vblank interrupt to make sure that + * hardware overlay is disabled. */ struct exynos_drm_overlay_ops { void (*mode_set)(struct device *subdrv_dev, @@ -68,6 +84,7 @@ struct exynos_drm_overlay_ops { void (*commit)(struct device *subdrv_dev, int zpos); void (*enable)(struct device *subdrv_dev, int zpos); void (*disable)(struct device *subdrv_dev, int zpos); + void (*wait_for_vblank)(struct device *subdrv_dev); }; /* |