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drm/radeon: Support DRM_MODE_PAGE_FLIP_ASYNC

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When this flag is set, we program the hardware to execute the flip
during horizontal blank (i.e. for the next scanline) instead of during
vertical blank (i.e. for the next frame).

Currently this is only supported on ASICs which have a page flip
completion interrupt (>= R600), and only if the use_pflipirq parameter
has value 2 (the default).

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer
2016-04-01 18:51:34 +09:00
committed by Alex Deucher
parent a4333b4c99
commit c63dd75858
8 changed files with 35 additions and 24 deletions
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2
drivers/gpu/drm/radeon/r100.c
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@@ -153,7 +153,7 @@ void r100_wait_for_vblank(struct radeon_device *rdev, int crtc)
* bit to go high, when it does, we release the lock, and allow the
* double buffered update to take place.
*/
void r100_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
void r100_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base, bool async)
{
struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
u32 tmp = ((u32)crtc_base) | RADEON_CRTC_OFFSET__OFFSET_LOCK;