diff options
| author | Yakir Yang <ykk@rock-chips.com> | 2016-07-24 14:57:40 +0800 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2016-08-23 11:44:31 -0400 |
| commit | 69c34e41f5d4e8a719d67673647b39f807ae8c71 (patch) | |
| tree | 404f33b4f885e1c12146876b4cde0045b2526865 /drivers/gpu/drm/rockchip/rockchip_drm_drv.h | |
| parent | 0b8b059a75b08f85e3db843aa33461a6e0d3bb09 (diff) | |
| download | linux-69c34e41f5d4e8a719d67673647b39f807ae8c71.tar.bz2 | |
drm/rockchip: vop: export line flag function
VOP have integrated a hardware counter which indicate the exact display
line that vop is scanning. And if we're interested in a specific line,
we can set the line number to vop line_flag register, and then vop would
generate a line_flag interrupt for it.
For example eDP PSR function is interested in the vertical blanking
period, then driver could set the line number to zero.
This patch have exported a symbol that allow other driver to listen the
line flag event with given timeout limit:
- rockchip_drm_wait_line_flag()
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/rockchip/rockchip_drm_drv.h')
| -rw-r--r-- | drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h index ea3932940061..239b830bc1a3 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h @@ -70,4 +70,7 @@ int rockchip_drm_dma_attach_device(struct drm_device *drm_dev, struct device *dev); void rockchip_drm_dma_detach_device(struct drm_device *drm_dev, struct device *dev); +int rockchip_drm_wait_line_flag(struct drm_crtc *crtc, unsigned int line_num, + unsigned int mstimeout); + #endif /* _ROCKCHIP_DRM_DRV_H_ */ |