On Tue, 10 Sep 2024 14:19:19 +0300, Tomi Valkeinen wrote: > The DP subsystem for ZynqMP supports audio via two channels, and the DP > DMA has dma-engines for those channels. For some reason the DT binding > has not specified those channels, even if the picture included in > xlnx,zynqmp-dpsub.yaml shows "2 x aud" DMAs. > > This hasn't caused any issues as the drivers have not supported audio, > and has thus gone unnoticed. > > To make it possible to add the audio support to the driver, add the two > audio DMAs to the binding. While strictly speaking this is an ABI break, > there should be no regressions caused by this as we're adding new > entries at the end of the dmas list, and, after the audio support has > been added in "arm64: dts: zynqmp: Add DMA for DP audio", the driver > will treat the audio DMAs as optional to also support the old bindings. > > Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx> > --- > .../devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.yaml | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
