diff options
Diffstat (limited to 'meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0001-arm64-dts-renesas-disable-r8a7796-hscif0-dma.patch')
| -rw-r--r-- | meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0001-arm64-dts-renesas-disable-r8a7796-hscif0-dma.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0001-arm64-dts-renesas-disable-r8a7796-hscif0-dma.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0001-arm64-dts-renesas-disable-r8a7796-hscif0-dma.patch new file mode 100644 index 0000000..31a66b7 --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0001-arm64-dts-renesas-disable-r8a7796-hscif0-dma.patch @@ -0,0 +1,34 @@ +From 9f2cf209ef8235f33683ca941fd0d7bdcca4078d Mon Sep 17 00:00:00 2001 +From: Matt Porter <mporter@konsulko.com> +Date: Sun, 17 Dec 2017 21:44:41 -0500 +Subject: [PATCH] arm64: dts: renesas: disable r8a7796 hscif0 dma + +When streaming A2DP audio on WiLink8, DMA errors are +seen from the rcar-dmac driver servicing hscif0. As +a result, data corruption is seen by the UIM service +managing the link to the Wilink8 device. This data +corruption manifests as dropped frames and audibly as +"skips" in the audio playback. + +Workaround this issue by disabling DMA for hscif0. + +Signed-off-by: Matt Porter <mporter@konsulko.com> +--- + arch/arm64/boot/dts/renesas/r8a7796.dtsi | 1 - + 1 file changed, 1 deletion(-) + +diff --git a/arch/arm64/boot/dts/renesas/r8a7796.dtsi b/arch/arm64/boot/dts/renesas/r8a7796.dtsi +index e3a5c25bc3da..dd97af4bdd60 100644 +--- a/arch/arm64/boot/dts/renesas/r8a7796.dtsi ++++ b/arch/arm64/boot/dts/renesas/r8a7796.dtsi +@@ -1282,7 +1282,6 @@ + <&scif_clk>; + clock-names = "fck", "brg_int", "scif_clk"; + dmas = <&dmac1 0x31>, <&dmac1 0x30>; +- dma-names = "tx", "rx"; + power-domains = <&sysc R8A7796_PD_ALWAYS_ON>; + status = "disabled"; + }; +-- +2.11.0 + |