From 94351a2d993e333855b1c5102d4c4d8a19c172bb Mon Sep 17 00:00:00 2001 From: Chen-Yu Tsai Date: Thu, 24 Apr 2025 18:25:04 +0800 Subject: [PATCH] arm64: dts: mediatek: mt8173: Reserve memory for audio frontend Some MediaTek platforms already reserve a small block of memory for the audio frontend. These platforms reserve it at a fixed address, though it is unclear if that is due to hardware access restrictions or simply compacting the reserved memory blocks together. Reserve the same size of memory on the MT8173 as well, to align with the other platforms. This also helps with memory starvation as these devices commonly end up in low memory conditions. Signed-off-by: Chen-Yu Tsai Reviewed-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20250424102509.1083185-11-wenst@chromium.org Signed-off-by: AngeloGioacchino Del Regno --- arch/arm64/boot/dts/mediatek/mt8173.dtsi | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi index 6d1d8877b43f2..122a57c3780b6 100644 --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi @@ -318,6 +318,14 @@ #address-cells = <2>; #size-cells = <2>; ranges; + + afe_dma_mem: audio-dma-pool { + compatible = "shared-dma-pool"; + size = <0 0x100000>; + alignment = <0 0x10>; + no-map; + }; + vpu_dma_reserved: vpu-dma-mem@b7000000 { compatible = "shared-dma-pool"; reg = <0 0xb7000000 0 0x500000>; @@ -887,6 +895,7 @@ <&topckgen CLK_TOP_AUD_2_SEL>; assigned-clock-parents = <&topckgen CLK_TOP_APLL1>, <&topckgen CLK_TOP_APLL2>; + memory-region = <&afe_dma_mem>; }; mmc0: mmc@11230000 { -- 2.47.2