[PATCH v2 0/6] Add support for atomic async page-flips

This series adds support for DRM_MODE_PAGE_FLIP_ASYNC for atomic commits, aka. "immediate flip" (which might result in tearing). The feature was only available via the legacy uAPI, however for gaming use-cases it may be desirable to enable it via the atomic uAPI too. - v1: https://patchwork.freede

[PATCH v2 1/6] amd/display: only accept async flips for fast updates

Up until now, amdgpu was silently degrading to vsync when user-space requested an async flip but the hardware didn't support it. The hardware doesn't support immediate flips when the update changes the FB pitch, the DCC state, the rotation, enables or disables CRTCs or planes, etc. This is reflect

[PATCH v2 2/6] drm: document DRM_MODE_PAGE_FLIP_ASYNC

This is a subset of [1], included here because a subsequent patch needs to document the behavior of this flag under the atomic uAPI. v2: new patch [1]: https://patchwork.freedesktop.org/patch/500177/ Signed-off-by: Simon Ser --- include/uapi/drm/drm_mode.h | 7 +++ 1 file changed, 7 insert

[PATCH v2 4/6] drm: allow DRM_MODE_PAGE_FLIP_ASYNC for atomic commits

If the driver supports it, allow user-space to supply the DRM_MODE_PAGE_FLIP_ASYNC flag to request an async page-flip. Set drm_crtc_state.async_flip accordingly. Document that drivers will reject atomic commits if an async flip isn't possible. This allows user-space to fall back to something else.

[PATCH v2 3/6] drm: introduce drm_mode_config.atomic_async_page_flip_not_supported

This new field indicates whether the driver has the necessary logic to support async page-flips via the atomic uAPI. This is leveraged by the next commit to allow user-space to use this functionality. All atomic drivers setting drm_mode_config.async_page_flip are updated to also set drm_mode_confi

[PATCH v2 5/6] drm: introduce DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP

This new kernel capability indicates whether async page-flips are supported via the atomic uAPI. DRM clients can use it to check for support before feeding DRM_MODE_PAGE_FLIP_ASYNC to the kernel. Make it clear that DRM_CAP_ASYNC_PAGE_FLIP is for legacy uAPI only. Signed-off-by: Simon Ser Cc: Dan

[PATCH v2 6/6] amd/display: indicate support for atomic async page-flips on DC

amdgpu_dm_commit_planes() already sets the flip_immediate flag for async page-flips. This flag is used to set the UNP_FLIP_CONTROL register. Thus, no additional change is required to handle async page-flips with the atomic uAPI. v2: make it clear this commit is about DC and not only DCN Signed-of