ALSA: hda - Restrict PCM parameters per ELD information over HDMI
When a device is plugged over HDMI, it passes some information in ELD
including the supported PCM parameters like formats, rates, channels.
This patch adds the check to PCM open callback of HDMI streams so that
only valid parameters the device supports are used.
When no device is plugged, the parameters the codec supports are used;
it's mostly all parameters the hardware can work. This is for apps
that are started before device plugging and do probing (e.g. a sound
daemon), so that at least, probing would work even before the device
plugging.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/patch_nvhdmi.c b/sound/pci/hda/patch_nvhdmi.c
index 77e2b40..f636870 100644
--- a/sound/pci/hda/patch_nvhdmi.c
+++ b/sound/pci/hda/patch_nvhdmi.c
@@ -347,10 +347,8 @@
static struct hda_pcm_stream nvhdmi_pcm_digital_playback_8ch_89 = {
.substreams = 1,
.channels_min = 2,
- .rates = SUPPORTED_RATES,
- .maxbps = SUPPORTED_MAXBPS,
- .formats = SUPPORTED_FORMATS,
.ops = {
+ .open = hdmi_pcm_open,
.prepare = nvhdmi_dig_playback_pcm_prepare_8ch_89,
.cleanup = nvhdmi_playback_pcm_cleanup,
},