Hi Marek, On Wed, Oct 07, 2020 at 10:40:26AM +0200, Marek Vasut wrote: > On 10/7/20 3:24 AM, Laurent Pinchart wrote: > > [...] > > > + bus-width: > > + enum: [16, 18, 24] > > + description: | > > + The output bus width. This value overrides the configuration > > + derived from the connected device (encoder or panel). It should > > + only be specified when PCB routing of the data signals require a > > + different bus width on the LCDIF and the connected device. For > > + instance, when a 18-bit RGB panel has its R[5:0], G[5:0] and > > + B[5:0] signals connected to LCD_DATA[7:2], LCD_DATA[15:10] and > > + LCD_DATA[23:18] instead of LCD_DATA[5:0], LCD_DATA[11:6] and > > + LCD_DATA[17:12], bus-width should be set to 24. > > The iMX6 IPUv3 uses interface-pix-fmt which is a bit more flexible, but > I'm not sure whether it's the right way to go about this, see: > Documentation/devicetree/bindings/display/imx/fsl-imx-drm.txt I think specifying the bus with is better. It's a standard property, but more than that, a given bus width can carry different formats. For instance, a 24-bus could carry RGB666 data (with dithering for the LSBs). -- Regards, Laurent Pinchart
