diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0985-ARM-bcm2711-rpi.dts-Unlock-DMA-channels-9-10.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0985-ARM-bcm2711-rpi.dts-Unlock-DMA-channels-9-10.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0985-ARM-bcm2711-rpi.dts-Unlock-DMA-channels-9-10.patch b/target/linux/bcm27xx/patches-5.4/950-0985-ARM-bcm2711-rpi.dts-Unlock-DMA-channels-9-10.patch new file mode 100644 index 0000000000..8895a020b2 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0985-ARM-bcm2711-rpi.dts-Unlock-DMA-channels-9-10.patch @@ -0,0 +1,33 @@ +From b10a49ab016ed9ac8f231845fb3e83fbf3505652 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Mon, 12 Oct 2020 14:36:35 +0100 +Subject: [PATCH] ARM: bcm2711-rpi.dts: Unlock DMA channels 9 & 10 + +The downstream-specific override of the 32-bit DMA mask needlessly +disables channels 9 and 10 - the VPU doesn't use them. This override +is redundant, so delete it. + +See: https://github.com/raspberrypi/linux/issues/3896 + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/bcm2711-rpi.dtsi | 7 +------ + 1 file changed, 1 insertion(+), 6 deletions(-) + +--- a/arch/arm/boot/dts/bcm2711-rpi.dtsi ++++ b/arch/arm/boot/dts/bcm2711-rpi.dtsi +@@ -246,13 +246,8 @@ + }; + }; + +-&dma { +- /* The VPU firmware uses DMA channel 11 for VCHIQ */ +- brcm,dma-channel-mask = <0x1f5>; +-}; +- + &dma40 { +- /* The VPU firmware DMA channel 11 for VCHIQ */ ++ /* The VPU firmware uses DMA channel 11 for VCHIQ */ + brcm,dma-channel-mask = <0x7000>; + }; + |