drm/bridge: imx: Add i.MX8qm/qxp pixel combiner support
This patch adds a drm bridge driver for i.MX8qm/qxp pixel combiner. The pixel combiner takes two output streams from a single display controller and manipulates the two streams to support a number of modes(bypass, pixel combine, YUV444 to YUV422, split_RGB) configured as either one screen, two screens, or virtual screens. The pixel combiner is also responsible for generating some of the control signals for the pixel link output channel. For now, the driver only supports the bypass mode. Reviewed-by: Robert Foss <robert.foss@linaro.org> Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> # Colibri iMX8X, LT170410-2WHC, LP156WF1 Signed-off-by: Liu Ying <victor.liu@nxp.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20220611141421.718743-5-victor.liu@nxp.com
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