ALSA: hda - Create virtual-master control for VIA codecs (370bafbd) · Commits · 戴 / test

sound/pci/hda/patch_via.c

+42 −0

Original line number	Diff line number	Diff line
		@@ -1308,6 +1308,31 @@ static const struct hda_pcm_stream via_pcm_digital_capture = {
		.channels_max = 2,
		};

		/*
		* slave controls for virtual master
		*/
		static const char * const via_slave_vols[] = {
		"Front Playback Volume",
		"Surround Playback Volume",
		"Center Playback Volume",
		"LFE Playback Volume",
		"Side Playback Volume",
		"Headphone Playback Volume",
		"Speaker Playback Volume",
		NULL,
		};

		static const char * const via_slave_sws[] = {
		"Front Playback Switch",
		"Surround Playback Switch",
		"Center Playback Switch",
		"LFE Playback Switch",
		"Side Playback Switch",
		"Headphone Playback Switch",
		"Speaker Playback Switch",
		NULL,
		};

		static int via_build_controls(struct hda_codec *codec)
		{
		struct via_spec *spec = codec->spec;
		@@ -1343,6 +1368,23 @@ static int via_build_controls(struct hda_codec *codec)
		return err;
		}

		/* if we have no master control, let's create it */
		if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
		unsigned int vmaster_tlv[4];
		snd_hda_set_vmaster_tlv(codec, spec->multiout.dac_nids[0],
		HDA_OUTPUT, vmaster_tlv);
		err = snd_hda_add_vmaster(codec, "Master Playback Volume",
		vmaster_tlv, via_slave_vols);
		if (err < 0)
		return err;
		}
		if (!snd_hda_find_mixer_ctl(codec, "Master Playback Switch")) {
		err = snd_hda_add_vmaster(codec, "Master Playback Switch",
		NULL, via_slave_sws);
		if (err < 0)
		return err;
		}

		/* assign Capture Source enums to NID */
		kctl = snd_hda_find_mixer_ctl(codec, "Input Source");
		for (i = 0; kctl && i < kctl->count; i++) {