bcm27xx: add kernel 5.10 support

[openwrt/staging/chunkeey.git] / target / linux / bcm27xx / patches-5.10 / 950-0506-vc4-drm-Increase-hdmi-audio-axi-priority-to-avoid-lo.patch

diff --git a/target/linux/bcm27xx/patches-5.10/950-0506-vc4-drm-Increase-hdmi-audio-axi-priority-to-avoid-lo.patch b/target/linux/bcm27xx/patches-5.10/950-0506-vc4-drm-Increase-hdmi-audio-axi-priority-to-avoid-lo.patch
new file mode 100644 (file)
index 0000000..e829a24
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0506-vc4-drm-Increase-hdmi-audio-axi-priority-to-avoid-lo.patch
@@ -0,0 +1,36 @@
+From 40799ca446bed8dcb0bfc667fafb1c3a20f88b87 Mon Sep 17 00:00:00 2001
+From: Dom Cobley <popcornmix@gmail.com>
+Date: Fri, 12 Mar 2021 11:26:29 +0000
+Subject: [PATCH] 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>
+---
+ arch/arm/boot/dts/bcm2711-rpi.dtsi | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- 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";
+ };
+