target/linux/bcm27xx/patches-5.10/950-0506-vc4-drm-Increase-hdmi-audio-axi-priority-to-avoid-lo.patch

   1 From 40799ca446bed8dcb0bfc667fafb1c3a20f88b87 Mon Sep 17 00:00:00 2001
   2 From: Dom Cobley <popcornmix@gmail.com>
   3 Date: Fri, 12 Mar 2021 11:26:29 +0000
   4 Subject: [PATCH] vc4/drm: Increase hdmi audio axi priority to avoid
   5  lost samples
   6
   7 With HBR audio (8 channel 192kHz) we get occasional VC4_HD_MAI_CTL_DLATE error flags in
   8 HDMI_MAI_CTL which seem to correspond with audio dropouts.
   9
  10 Increasing the normal AXI priority for dma is needed to avoid these
  11
  12 Signed-off-by: Dom Cobley <popcornmix@gmail.com>
  13 ---
  14  arch/arm/boot/dts/bcm2711-rpi.dtsi | 4 ++--
  15  1 file changed, 2 insertions(+), 2 deletions(-)
  16
  17 --- a/arch/arm/boot/dts/bcm2711-rpi.dtsi
  18 +++ b/arch/arm/boot/dts/bcm2711-rpi.dtsi
  19 @@ -179,7 +179,7 @@
  20  };
  21
  22  &hdmi0 {
  23 -       dmas = <&dma (10|(1<<27)|(1<<24)|(0<<16)|(15<<20))>;
  24 +       dmas = <&dma (10|(1<<27)|(1<<24)|(10<<16)|(15<<20))>;
  25         status = "disabled";
  26  };
  27
  28 @@ -188,7 +188,7 @@
  29  };
  30
  31  &hdmi1 {
  32 -       dmas = <&dma (17|(1<<27)|(1<<24)|(0<<16)|(15<<20))>;
  33 +       dmas = <&dma (17|(1<<27)|(1<<24)|(10<<16)|(15<<20))>;
  34         status = "disabled";
  35  };
  36