16.12.2021 16:46, Thierry Reding пишет: > On Sat, Dec 04, 2021 at 05:37:23PM +0300, Dmitry Osipenko wrote: >> Add HDMI audio graph to Tegra20 device-tree to enable HDMI audio on >> Tegra20 devices. >> >> Signed-off-by: Dmitry Osipenko <[email protected]> >> --- >> arch/arm/boot/dts/tegra20.dtsi | 22 +++++++++++++++++++++- >> 1 file changed, 21 insertions(+), 1 deletion(-) >> >> diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi >> index 72cbe32d0c1d..dde228bcbbff 100644 >> --- a/arch/arm/boot/dts/tegra20.dtsi >> +++ b/arch/arm/boot/dts/tegra20.dtsi >> @@ -186,7 +186,7 @@ rgb { >> }; >> }; >> >> - hdmi@54280000 { >> + tegra_hdmi: hdmi@54280000 { >> compatible = "nvidia,tegra20-hdmi"; >> reg = <0x54280000 0x00040000>; >> interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>; >> @@ -1063,4 +1063,24 @@ pmu { >> interrupt-affinity = <&{/cpus/cpu@0}>, >> <&{/cpus/cpu@1}>; >> }; >> + >> + sound-hdmi { >> + compatible = "simple-audio-card"; >> + simple-audio-card,name = "NVIDIA Tegra20 HDMI"; >> + >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + simple-audio-card,dai-link@0 { >> + reg = <0>; >> + >> + cpu { >> + sound-dai = <&tegra_spdif>; >> + }; >> + >> + codec { >> + sound-dai = <&tegra_hdmi>; >> + }; >> + }; >> + }; > > Should this be status = "disabled" and then only enabled for platforms > that actually enable HDMI?
Assuming that HDMI node is disabled, we assume that the card won't be initialized. It won't be a problem to restructure this card in DT later on if we will have any other use-cases than we currently have, but this is unlikely to happen in practice.
