Hi, On 13-12-17 16:33, Maxime Ripard wrote: > Hi, > > This is a first serie to enable the display engine frontend. > > This hardware block is found in the first generation Display Engine from > Allwinner. Its role is to implement more advanced features that the > associated backend, even though the backend alone can be used (and was used > so far) for basic composition. > > Among those features, we will find hardware scaling, that is supported in > this serie, colorspace conversions, or more exotic formats support such as > the one output by the VPU. So, if I have read the code correctly. The frontend will be used whenever the input size differs from the output size. > > Let me know what you think, > Maxime > > Maxime Ripard (8): > drm/sun4i: backend: Move line stride setup to buffer setup function > drm/sun4i: backend: Allow a NULL plane pointer to retrieve the format > drm/sun4i: sun4i_layer: Add a custom plane state > drm/sun4i: crtc: Add a custom crtc atomic_check > drm/sun4i: Add a driver for the display frontend > drm/sun4i: sun4i_layer: Wire in the frontend > drm/sun4i: sun4i_layer: Add a custom atomic_check for the frontend > ARM: dts: sun8i: a33 Enable our display frontend > > arch/arm/boot/dts/sun8i-a33.dtsi | 1 +- > drivers/gpu/drm/sun4i/Makefile | 3 +- > drivers/gpu/drm/sun4i/sun4i_backend.c | 139 +++++++++- > drivers/gpu/drm/sun4i/sun4i_backend.h | 6 +- > drivers/gpu/drm/sun4i/sun4i_crtc.c | 14 +- > drivers/gpu/drm/sun4i/sun4i_drv.c | 16 +- > drivers/gpu/drm/sun4i/sun4i_drv.h | 1 +- > drivers/gpu/drm/sun4i/sun4i_frontend.c | 377 ++++++++++++++++++++++++++- > drivers/gpu/drm/sun4i/sun4i_frontend.h | 102 +++++++- > drivers/gpu/drm/sun4i/sun4i_layer.c | 75 ++++- > drivers/gpu/drm/sun4i/sun4i_layer.h | 11 +- > drivers/gpu/drm/sun4i/sunxi_engine.h | 2 +- > 12 files changed, 727 insertions(+), 20 deletions(-) > create mode 100644 drivers/gpu/drm/sun4i/sun4i_frontend.c > create mode 100644 drivers/gpu/drm/sun4i/sun4i_frontend.h > > base-commit: 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
