Gentle reminder that I still haven't heard anything about the series by the Samsung guys ;)
With best wishes, Tobias Tobias Jakobi wrote: > Hello, > > this is a rework of the layer blending setup in the Exynos DRM mixer. The > current setup is static and spread out through the mixer code. This rework > pushes all the configuration details into a layer_config array, which > specifies the priority of each layer. > > Two arrays are currently found in the code, one for SoC versions with a video > processor (VP) and one for SoC versions without VP. The VP gives us one > additional layer, the video layer, which natively supports the NV12/NV21 > pixelformat. > > The blending setup roughly works like this: > 1) Find the bottom-most enabled layer. Disable all blending for this layer. > This is done because we currently don't expose modification of the mixer > background to userspace. Once this is done we can add more flexibility here. > 2) Find the next enabled layer in our layer stack. If the layer has a > framebuffer with an alpha-pixelformat attached, enable blending for this > layer. If not, disable blending. > 3) Iterate (2) until all enabled layers are processed. > > The series has been tested on a Hardkernel Odroid-X2 (Exynos4412, which has a > VP). > > If you want to use libdrm's modetest to check the series, please apply > patches [1] and [2]. This should make it possible to also test a plane with > NV12 format (which is located 'behind' the primary plane). > > With best wishes, > Tobias > > [1] https://patchwork.kernel.org/patch/6349241/ > [2] https://patchwork.kernel.org/patch/6349261/ > > > Tobias Jakobi (5): > drm/exynos: mixer: refactor layer setup > drm/exynos: mixer: introduce mixer_layer_blending() > drm/exynos: mixer: remove all static blending setup > drm/exynos: mixer: do blending setup in mixer_cfg_layer() > drm/exynos: mixer: also allow ARGB1555 and ARGB4444 > > drivers/gpu/drm/exynos/exynos_mixer.c | 246 > +++++++++++++++++++++++++++++----- > drivers/gpu/drm/exynos/regs-mixer.h | 1 + > 2 files changed, 213 insertions(+), 34 deletions(-) >
