On Tue, Jul 14, 2020 at 03:13:01PM +0800, Chen-Yu Tsai wrote: > From: Chen-Yu Tsai <wens@xxxxxxxx> > > Some LCD panels do not support 24-bit true color, or 8bits per channel > RGB. Many low end ones only support up to 6 bits per channel natively. > > Add a device tree property to describe the native bit depth of the > panel. This is separate from the bus width or format of the connection > to the display output. > > Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx> > --- > .../devicetree/bindings/display/panel/panel-dpi.yaml | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml b/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml > index 0cd74c8dab42..8eb013fb1969 100644 > --- a/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml > +++ b/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml > @@ -26,6 +26,9 @@ properties: > height-mm: true > label: true > panel-timing: true > + bits-per-color: > + description: > + Shall contain an integer describing the number of bits per color. You should specify its type (u32), range (1-8 I guess?) and default value (which seems to be 8). Also, it's not unusual to have a different number of bits per color, like for 16 bits panels where we usually use RGB565. I guess we could make that an array? Maxime
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