[PATCH 04/31] drm/vc4: hdmi: Avoid log spam for audio start failure

[Dave Stevenson <dave.stevenson@raspberrypi.com>]

From: Dom Cobley <popcornmix@gmail.com>

We regularly get dmesg error reports of:
[   18.184066] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -19
[   18.184098]  MAI: soc_pcm_open() failed (-19)

These are generated for any disconnected hdmi interface when pulseaudio
attempts to open the associated ALSA device (numerous times). Each open
generates a kernel error message, generating general log spam.

The error messages all come from _soc_pcm_ret in sound/soc/soc-pcm.c#L39
which suggests returning ENOTSUPP, rather that ENODEV will be quiet.
And indeed it is.

Signed-off-by: Dom Cobley <popcornmix@gmail.com>
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index d57c4a5948c8..04d32dc3e98c 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1914,7 +1914,7 @@ static int vc4_hdmi_audio_startup(struct device *dev, void *data)
 	}
 
 	if (!vc4_hdmi_audio_can_stream(vc4_hdmi)) {
-		ret = -ENODEV;
+		ret = -ENOTSUPP;
 		goto out_dev_exit;
 	}
 
-- 
2.34.1