From: Boris Brezillon <boris.brezil...@free-electrons.com>

These are optional, but necessary for HDMI audio support.

Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
Signed-off-by: Eric Anholt <e...@anholt.net>
---
 Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt 
b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
index 34c7fddcea39..ca02d3e4db91 100644
--- 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"
-- 
2.11.0

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