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[2001:4c4e:1b8d:1600:206d:23e7:680:cbaa]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4954834edc3sm91477455e9.0.2026.07.18.01.57.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Jul 2026 01:57:44 -0700 (PDT) From: Igor Paunovic To: Dmitry Osipenko , Mauro Carvalho Chehab Cc: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Igor Paunovic Subject: [PATCH v3 1/4] dt-bindings: media: snps,dw-hdmi-rx: add #sound-dai-cells Date: Sat, 18 Jul 2026 10:57:25 +0200 Message-ID: <20260718085728.6797-2-royalnet026@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260718085728.6797-1-royalnet026@gmail.com> References: <20260718085728.6797-1-royalnet026@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The HDMI RX controller can expose the audio embedded in the incoming HDMI stream as an ALSA capture device. Document the #sound-dai-cells property so that a sound card can reference the HDMI RX audio DAI. Signed-off-by: Igor Paunovic --- Changes in v3: - no changes Changes in v2 (all suggested by Sebastian Reichel): - reworded the commit message to describe the hardware - property description now documents the DAI indexes (0 = I2S, 1 = S/PDIF) - moved the consumer reference into the binding example .../devicetree/bindings/media/snps,dw-hdmi-rx.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml index b7f6c87..fa6cd0d 100644 --- a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml +++ b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml @@ -78,6 +78,13 @@ properties: The phandle of the syscon node for the Video Output GRF register to enable EDID transfer through SDAIN and SCLIN. + "#sound-dai-cells": + const: 1 + description: + The HDMI RX controller has two digital audio interfaces, one for + I2S and one for S/PDIF. The DAI cell selects the interface, 0 for + I2S and 1 for S/PDIF. + required: - compatible - reg @@ -129,4 +136,6 @@ examples: pinctrl-0 = <&hdmim1_rx_cec &hdmim1_rx_hpdin &hdmim1_rx_scl &hdmim1_rx_sda &hdmirx_5v_detection>; pinctrl-names = "default"; hpd-gpios = <&gpio1 22 GPIO_ACTIVE_LOW>; + /* referenced by a sound card as <&hdmi_receiver 0> (0: I2S, 1: S/PDIF) */ + #sound-dai-cells = <1>; }; -- 2.53.0