dt-bindings: Document the dmas and dma-names properties for VC4 HDMI

These are optional, but necessary for HDMI audio support. Signed-off-by: Boris Brezillon <[email protected]> Signed-off-by: Eric Anholt <[email protected]> Acked-by: Rob Herring <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
6by9 · Mar 16, 2017 · 199a769 · 199a769
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commit 199a769
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
@@ -34,6 +34,9 @@ Optional properties for HDMI:
 - hpd-gpios:	The GPIO pin for HDMI hotplug detect (if it doesn't appear
 		  as an interrupt/status bit in the HDMI controller
 		  itself).  See bindings/pinctrl/brcm,bcm2835-gpio.txt
+- dmas:		Should contain one entry pointing to the DMA channel used to
+		transfer audio data
+- dma-names:	Should contain "audio-rx"
 
 Required properties for DPI:
 - compatible:	Should be "brcm,bcm2835-dpi"