[PATCH 11/11] ARM: dts: bcm2711: Tune DMA parameters for HDMI audio

Maxime Ripard maxime at cerno.tech
Fri May 7 07:03:34 PDT 2021


From: Dom Cobley <popcornmix at gmail.com>

Enable NO_WAIT_RESP, DMA_WIDE_SOURCE, DMA_WIDE_DEST, and bump the DMA
panic and AXI priorities to avoid any DMA transfer error with HBR audio
(8 channel, 192Hz).

Signed-off-by: Dom Cobley <popcornmix at gmail.com>
Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
 arch/arm/boot/dts/bcm2711.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index 462b1dfb0385..8a7350cfcd9c 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -352,7 +352,7 @@ hdmi0: hdmi at 7ef00700 {
 			interrupt-names = "cec-tx", "cec-rx", "cec-low",
 					  "wakeup", "hpd-connected", "hpd-removed";
 			ddc = <&ddc0>;
-			dmas = <&dma 10>;
+			dmas = <&dma (10 | (1 << 27) | (1 << 24)| (15 << 20) | (10 << 16))>;
 			dma-names = "audio-rx";
 			status = "disabled";
 		};
@@ -395,7 +395,7 @@ hdmi1: hdmi at 7ef05700 {
 				     <9>, <10>, <11>;
 			interrupt-names = "cec-tx", "cec-rx", "cec-low",
 					  "wakeup", "hpd-connected", "hpd-removed";
-			dmas = <&dma 17>;
+			dmas = <&dma (17 | (1 << 27) | (1 << 24)| (15 << 20) | (10 << 16))>;
 			dma-names = "audio-rx";
 			status = "disabled";
 		};
-- 
2.31.1




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