ALSA: hda: program stripe control for codec (053b0559) · Commits · 戴 / test

Program codec stripe through AC_VERB_SET_STRIPE_CONTROL to use multiple sdo lines if supported. Audio needs to be striped across number of sdo lines for simultaneous playbacks of higher resolutions to work. This needs to be implemented only for an Audio Output Converter and only if the stripe bit(AC_WCAP_STRIPE) of Audio Widget Capabilities parameter is 1. Signed-off-by:

Sameer Pujar <spujar@nvidia.com> Reviewed-by:

Mohan Kumar D <mkumard@nvidia.com> Reviewed-by:

Ravindra Lokhande <rlokhande@nvidia.com> Reviewed-by:

Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by:

Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_hdmi.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -1865,7 +1865,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
		hda_nid_t pin_nid;
		struct snd_pcm_runtime *runtime = substream->runtime;
		bool non_pcm;
		int pinctl;
		int pinctl, stripe;
		int err = 0;

		mutex_lock(&spec->pcm_lock);
		@@ -1909,6 +1909,14 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
		per_pin->channels = substream->runtime->channels;
		per_pin->setup = true;

		if (get_wcaps(codec, cvt_nid) & AC_WCAP_STRIPE) {
		stripe = snd_hdac_get_stream_stripe_ctl(&codec->bus->core,
		substream);
		snd_hda_codec_write(codec, cvt_nid, 0,
		AC_VERB_SET_STRIPE_CONTROL,
		stripe);
		}

		hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
		mutex_unlock(&per_pin->lock);
		if (spec->dyn_pin_out) {

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