This patch enables HDMI sound (I2S0) and Analog sound (I2S1) which are defined in rk3328.dtsi, and replace SPDIF nodes.
We can use SPDIF passthrough with suitable ALSA settings and on mpv or other media players. - Settings: https://github.com/LibreELEC/LibreELEC.tv/blob/master/projects/Rockchip/filesystem/usr/share/alsa/cards/SPDIF.conf - Ex.: mpv foo.ac3 --audio-spdif=ac3 --audio-device='alsa/SPDIF.pcm.iec958.0:SPDIF' [Why use simple-audio-card for SPDIF?] For newly adding nodes, ASoC guys recommend to use audio-graph-card. But all other sound nodes for rk3328 have already been defined by simple-audio-card. In this time, I chose consistency of sound nodes. [DMA allocation problem] After apply this patch, UART2 will fail to allocate DMA resources but UART driver can work fine without DMA. This error is related to the DMAC of rk3328 (pl330 or compatible). DMAC connected to 16 DMA sources. Each sources have ID number that is called 'Req number' in rk3328 TRM. After apply this patch total 7 sources will be activated as follows: | Req number | Source | Required | | | | channels | |------------+--------+-----------| | 8, 9 | SPI0 | 2ch | | 11, 12 | I2S0 | 2ch | | 14, 15 | I2S1 | 2ch | | 10 | SPDIF | 1ch | |------------+--------+-----------| | | Total | 7ch | |------------+--------+-----------| | 6, 7 | UART2 | 2ch | -> cannot get DMA channels Due to rk3328 DMAC specification we can use max 8 channels at same time. If SPI0/I2S0/I2S1/SPDIF will be activated by this patch, required DMAC channels reach to 7. So last two channels (for UART2) cannot get DMA resources. Virt-dma mechanism for pl0330 DMAC driver is needed to fix this problem. Signed-off-by: Katsuhiro Suzuki <katsuh...@katsuster.net> --- .../arm64/boot/dts/rockchip/rk3328-rock64.dts | 58 +++++++++---------- 1 file changed, 26 insertions(+), 32 deletions(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts index 86cfb5c50a94..4608f8fc6ff3 100644 --- a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts +++ b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts @@ -84,34 +84,34 @@ standby_led: led-1 { }; }; - sound { - compatible = "audio-graph-card"; - label = "rockchip,rk3328"; - dais = <&i2s1_p0 - &spdif_p0>; + spdif_sound: spdif-sound { + compatible = "simple-audio-card"; + simple-audio-card,name = "SPDIF"; + status = "okay"; + + simple-audio-card,cpu { + sound-dai = <&spdif>; + }; + + simple-audio-card,codec { + sound-dai = <&spdif_dit>; + }; }; - spdif-dit { + spdif_dit: spdif-dit { compatible = "linux,spdif-dit"; #sound-dai-cells = <0>; - - port { - dit_p0_0: endpoint { - remote-endpoint = <&spdif_p0_0>; - }; - }; + status = "okay"; }; }; +&analog_sound { + status = "okay"; +}; + &codec { mute-gpios = <&grf_gpio 0 GPIO_ACTIVE_LOW>; status = "okay"; - - port@0 { - codec_p0_0: endpoint { - remote-endpoint = <&i2s1_p0_0>; - }; - }; }; &cpu0 { @@ -163,6 +163,10 @@ &hdmi { status = "okay"; }; +&hdmi_sound { + status = "okay"; +}; + &hdmiphy { status = "okay"; }; @@ -278,16 +282,12 @@ regulator-state-mem { }; }; -&i2s1 { +&i2s0 { status = "okay"; +}; - i2s1_p0: port { - i2s1_p0_0: endpoint { - dai-format = "i2s"; - mclk-fs = <256>; - remote-endpoint = <&codec_p0_0>; - }; - }; +&i2s1 { + status = "okay"; }; &io_domains { @@ -337,12 +337,6 @@ &sdmmc { &spdif { pinctrl-0 = <&spdifm0_tx>; status = "okay"; - - spdif_p0: port { - spdif_p0_0: endpoint { - remote-endpoint = <&dit_p0_0>; - }; - }; }; &spi0 { -- 2.27.0
