From: Dom Cobley <popcornmix@gmail.com>
Date: Fri, 12 Mar 2021 11:26:29 +0000 (+0000)
Subject: vc4/drm: Increase hdmi audio axi priority to avoid lost samples
X-Git-Tag: accepted/tizen/unified/20210330.111217~270
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9601a6df09f881583c441d1a308878b360432dc5;p=platform%2Fkernel%2Flinux-rpi.git

vc4/drm: Increase hdmi audio axi priority to avoid lost samples

With HBR audio (8 channel 192kHz) we get occasional VC4_HD_MAI_CTL_DLATE error flags in
HDMI_MAI_CTL which seem to correspond with audio dropouts.

Increasing the normal AXI priority for dma is needed to avoid these

Signed-off-by: Dom Cobley <popcornmix@gmail.com>
---

diff --git a/arch/arm/boot/dts/bcm2711-rpi.dtsi b/arch/arm/boot/dts/bcm2711-rpi.dtsi
index 8053ef5..20581ee 100644
--- a/arch/arm/boot/dts/bcm2711-rpi.dtsi
+++ b/arch/arm/boot/dts/bcm2711-rpi.dtsi
@@ -179,7 +179,7 @@
 };
 
 &hdmi0 {
-	dmas = <&dma (10|(1<<27)|(1<<24)|(0<<16)|(15<<20))>;
+	dmas = <&dma (10|(1<<27)|(1<<24)|(10<<16)|(15<<20))>;
 	status = "disabled";
 };
 
@@ -188,7 +188,7 @@
 };
 
 &hdmi1 {
-	dmas = <&dma (17|(1<<27)|(1<<24)|(0<<16)|(15<<20))>;
+	dmas = <&dma (17|(1<<27)|(1<<24)|(10<<16)|(15<<20))>;
 	status = "disabled";
 };