linux-kernel - [PATCH v3 3/9] ASoC: dt-bindings: mt8173-afe-pcm: Allow specifying reserved memory region

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Message-ID: <20250612074901.4023253-4-wenst@chromium.org>
Date: Thu, 12 Jun 2025 15:48:54 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jiaxin Yu <jiaxin.yu@...iatek.com>,
	linux-sound@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/9] ASoC: dt-bindings: mt8173-afe-pcm: Allow specifying reserved memory region

It is desirable to reserve memory for the audio frontend.

Allow the "memory-region" property, to be used to point to a reserved
memory region.

Acked-by: Rob Herring (Arm) <robh@...nel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
 .../devicetree/bindings/sound/mediatek,mt8173-afe-pcm.yaml   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt8173-afe-pcm.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt8173-afe-pcm.yaml
index 666408d32f5c..d8993b5d457a 100644
--- a/Documentation/devicetree/bindings/sound/mediatek,mt8173-afe-pcm.yaml
+++ b/Documentation/devicetree/bindings/sound/mediatek,mt8173-afe-pcm.yaml
@@ -48,6 +48,10 @@ properties:
   power-domains:
     maxItems: 1
 
+  memory-region:
+    description: memory region for audio DMA buffers
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -90,4 +94,5 @@ examples:
                        "i2s2_m",
                        "i2s3_m",
                        "i2s3_b";
+          memory-region = <&afe_dma_mem>;
     };
-- 
2.50.0.rc1.591.g9c95f17f64-goog