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Mario Kleiner authored
DCE-4/5/6 can't support more than 12 bpc deep color over hdmi, so clamp to 12 bpc when a hdmi deep color capable display is connected. This even makes sense on DCE-8+, which could do up to 16 bpc, as driving with more than 12 bpc would only waste video bandwidth as long as we don't support framebuffers with more than 12 bpc depth. On pre-DCE4 we clamp hdmi bit depth to 8 bpc, as those asics don't support hdmi deep color. Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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