Hello, A few months back I tried to add support for the underscan props to the VC4 driver [1] and this lead to the conclusion that, if we want to use the HW scaler to implement underscan we should scale all planes by the same factor, including the cursor plane which currently does not support scaling. This series addresses this limitation by allowing a cursor plane to be scaled. When the scaling factors stay the same, async updates can take place, when they change, the driver will fallback to sync updates. I will submit a new version of the underscan patchset as soon as this rework is accepted/merged. Regards, Boris [1]https://patchwork.kernel.org/patch/10394563/ Boris Brezillon (6): drm/vc4: Make vc4_lbm_size() return 0 when vertical scaling is disabled drm/vc4: Move LBM creation out of vc4_plane_mode_set() drm/vc4: Don't check plane state more than once drm/vc4: Rework the async update logic drm/vc4: Allow scaling on cursor plane drm/vc4: Allow YUV formats on cursor planes drivers/gpu/drm/vc4/vc4_drv.h | 6 + drivers/gpu/drm/vc4/vc4_plane.c | 223 ++++++++++++++++++++------------ 2 files changed, 148 insertions(+), 81 deletions(-) -- 2.17.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
