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Fix HDMI mono audio on RK3576 NanoPi boards by disabling incorrect capture support #430

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Merged
SuperKali merged 2 commits into from
Nov 20, 2025
+16 −1
Merged

Fix HDMI mono audio on RK3576 NanoPi boards by disabling incorrect capture support #430

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8925e5e
arm64: dts: rk3576-nanopi-r76s: disable unused spdif_tx3
SuperKali Nov 20, 2025
b4db105
ASoC: hdmi-codec: disable capture for HDMI-TX to fix mono audio
SuperKali Nov 20, 2025
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4 changes: 4 additions & 0 deletions arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -278,6 +278,10 @@
status = "disabled";
};

&spdif_tx3 {
status = "disabled";
};

&uart6 {
status = "okay";
};
13 changes: 12 additions & 1 deletion sound/soc/codecs/hdmi-codec.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1110,11 +1110,22 @@ static int hdmi_codec_probe(struct platform_device *pdev)
if (hcd->i2s) {
daidrv[i] = hdmi_i2s_dai;
daidrv[i].playback.channels_max = hcd->max_i2s_channels;
/* Disable capture for HDMI-TX (output only) to prevent
* PulseAudio from trying to open capture streams which
* causes "Only one simultaneous stream supported!" errors
* and results in mono audio output.
*/
daidrv[i].capture.channels_min = 0;
daidrv[i].capture.channels_max = 0;
i++;
}

if (hcd->spdif)
if (hcd->spdif) {
daidrv[i] = hdmi_spdif_dai;
/* Disable capture for HDMI-TX SPDIF (output only) */
daidrv[i].capture.channels_min = 0;
daidrv[i].capture.channels_max = 0;
}

dev_set_drvdata(dev, hcp);

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