linux-kernel - [PATCH] arm64: dts: rockchip: add HDMI sound node for rk3328-rock64

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Date:   Sat,  2 Feb 2019 13:34:44 +0900
From:   Katsuhiro Suzuki <katsuhiro@...suster.net>
To:     Heiko Stuebner <heiko@...ech.de>,
        linux-rockchip@...ts.infradead.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Katsuhiro Suzuki <katsuhiro@...suster.net>
Subject: [PATCH] arm64: dts: rockchip: add HDMI sound node for rk3328-rock64

This patch adds HDMI sound (I2S0) node and remove dma properties
from UART2 node for rock64.

The DMAC of rk3328 can use 8 channels at same time. Currently, total
7 channels are used as follows:
  - I2S1  2ch
  - UART2 2ch
  - SPDIF 1ch
  - SPI0  2ch

HDMI audio using I2S0 that requires 2ch but DMAC has only 1 channel.

UART2 can work without DMA resources, so this patch removes dma
allocation for UART2 and reuses it to I2S0.

Signed-off-by: Katsuhiro Suzuki <katsuhiro@...suster.net>
---
 .../arm64/boot/dts/rockchip/rk3328-rock64.dts | 24 ++++++++++++++++++-
 arch/arm64/boot/dts/rockchip/rk3328.dtsi      |  1 +
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
index 2157a528276b..e21645aa3fa5 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
@@ -68,7 +68,8 @@
 	sound {
 		compatible = "audio-graph-card";
 		label = "rockchip,rk3328";
-		dais = <&i2s1_p0
+		dais = <&i2s0_p0
+			&i2s1_p0
 			&spdif_p0>;
 	};
 
@@ -141,6 +142,12 @@
 
 &hdmi {
 	status = "okay";
+
+	port@0 {
+		hdmi_p0_0: endpoint {
+			remote-endpoint = <&i2s0_p0_0>;
+		};
+	};
 };
 
 &hdmiphy {
@@ -256,6 +263,18 @@
 	};
 };
 
+&i2s0 {
+	status = "okay";
+
+	i2s0_p0: port {
+		i2s0_p0_0: endpoint {
+			dai-format = "i2s";
+			mclk-fs = <256>;
+			remote-endpoint = <&hdmi_p0_0>;
+		};
+	};
+};
+
 &i2s1 {
 	status = "okay";
 
@@ -343,6 +362,9 @@
 
 &uart2 {
 	status = "okay";
+
+	/delete-property/ dmas;
+	/delete-property/ dma-names;
 };
 
 &u2phy {
diff --git a/arch/arm64/boot/dts/rockchip/rk3328.dtsi b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
index 84f14b132e8f..374b5da93a35 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
@@ -665,6 +665,7 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&hdmi_cec &hdmii2c_xfer &hdmi_hpd>;
 		rockchip,grf = <&grf>;
+		#sound-dai-cells = <0>;
 		status = "disabled";
 
 		ports {
-- 
2.20.1