"output format" DRM property for Pi0-3 #6211
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Add a custom property "Output format" that allows the overriding of the default colourspace choice in the way that the old firmware hdmi_pixel_encoding property did. If the chosen format is not supported, then it will still drop back to the older behaviour. This won't be acceptable to upstream, but it adds back the missing functionality of hdmi_pixel_encoding. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Pi4 has had the conversion matrices to drive YCbCr 444 and 422 output for a while, however Pi0-3 hasn't. YCbCr422 can't be supported by the hardware, but YCbCr 444 can be, so add the CCM. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
kiruthikpurpose
approved these changes
Oct 10, 2024
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Separated from #6133.
Adds support for setting the output format on Pi0-3 (supported on Pi4&5 via existing code and #6133 which is also included here).
Need to double check the CCM for BT601, and ideally ought to add the CCM for BT709.