As a result of commit d2cd795c4ece ("ALSA: hda - fixup for the bass speaker on Lenovo Carbon X1 7th gen"), the sound output level on my machine, an X1 Carbon 7th gen, was reduced to ~65% of its previous level when playing certain sounds. [1]
Internally, this laptop model has three outputs (PCM-OUT1, connection 0x02; PCM-OUT2, connection 0x03; SP-OUT PCM, connection 0x06) which can be routed to two sets of stereo speakers: Front (tweeters, node 0x14) and Bass (woofers, node 0x17, aka Rear in some contexts) and one headphone output (node 0x21). The tweeters are noticeably less powerful than the woofers. [2]
Before commit d2cd795c4ece, the bass speakers were connected to SP-OUT PCM. SP-OUT PCM is meant for s/pdif output and does not have volume control. This connection made volume control commonly ineffective (using the Master slider in alsa or pulseaudio apparently had little effect or alternated between mute or max with nothing in between).
commit d2cd795c4ece added quirk ALC285_FIXUP_SPEAKER2_TO_DAC1 which resulted in assigning both sets of speakers to PCM-OUT1, bringing the two sets of speakers under one effective volume control but also lowering the output volume noticeably.
Fix this by connecting PCM-OUT1 to Front speakers and PCM-OUT2 to Rear speakers. Each set of speakers gets its own volume control and the max output volume is restored to what it was before commit d2cd795c4ece. This is done by setting the connection of node 0x17 to 0x03.
However, when we do this, the HDA auto config automatically changes the connection of node 0x21 to 0x02. This output, meant for the front speakers, has some "secret" equalizer which changes the output volume according to the level of what's being played, after some delay[3]. This is undesirable with headphones. Therefore, this patch manually limits the connection of node 0x21 to 0x03.
The volume control for PCM-OUT2 is renamed to reflect its dual effect. This name is also used in a modified alsa UCM profile. [4]
It is possible that the X1 Carbon 8th gen would benefit from the same changes but I don't have a device to test that. Fixups are reordered so that the devices for 7th & 8th gen can share the same chain after the first fixup. The resulting chain is: ALC295_FIXUP_TPX17_DUAL_SPEAKERS/ALC285_FIXUP_SPEAKER2_TO_DAC1 ALC285_FIXUP_THINKPAD_HEADSET_JACK ALC269_FIXUP_THINKPAD_ACPI ALC269_FIXUP_SKU_IGNORE
[1] https://gist.github.com/hamidzr/dd81e429dc86f4327ded7a2030e7d7d9#gistcomment... [2] https://bugzilla.kernel.org/show_bug.cgi?id=207407#c10 [3] https://gist.github.com/hamidzr/dd81e429dc86f4327ded7a2030e7d7d9#gistcomment... [4] https://lore.kernel.org/alsa-devel/20200703072302.16876-1-benjamin.poirier@g...
Fixes: d2cd795c4ece ("ALSA: hda - fixup for the bass speaker on Lenovo Carbon X1 7th gen") Link: https://lore.kernel.org/alsa-devel/20200210025249.GA2700@f3/ Cc: Jaroslav Kysela perex@perex.cz Cc: Kailang Yang kailang@realtek.com Tested-by: Vincent Bernat vincent@bernat.ch Tested-by: Even Brenden evenbrenden@gmail.com Signed-off-by: Benjamin Poirier benjamin.poirier@gmail.com --- sound/pci/hda/patch_realtek.c | 56 ++++++++++++++++++++++++++++++++--- 1 file changed, 52 insertions(+), 4 deletions(-)
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 16696694da91..ef3dbf83e42b 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -5825,6 +5825,46 @@ static void alc285_fixup_speaker2_to_dac1(struct hda_codec *codec, } }
+static void alc295_fixup_tpx17_dual_speakers(struct hda_codec *codec, + const struct hda_fixup *fix, + int action) +{ + if (action == HDA_FIXUP_ACT_PRE_PROBE) { + static const hda_nid_t conn[] = { 0x03 }; + + /* For NID 0x17 (bass speakers), the connection list is {0x02, + * 0x03, 0x06}. Disable SP-OUT PCM (0x06) selection since it + * has no volume control, disable PCM1 (0x02) selection since + * it is for front speakers. This leaves PCM2 (0x03). + */ + snd_hda_override_conn_list(codec, 0x17, ARRAY_SIZE(conn), + conn); + /* For NID 0x21 (headphone out), the connection list is {0x02, + * 0x03}. Disable LOUT1 (0x02) selection since its volume + * fluctuates according to input level. This leaves LOUT2 + * (0x03). + */ + snd_hda_override_conn_list(codec, 0x21, ARRAY_SIZE(conn), + conn); + } else if (action == HDA_FIXUP_ACT_INIT) { + /* Because the overridden connection lists contain only a + * single node, __parse_nid_path() does not label the output + * as "multi". This leads snd_hda_activate_path() to skip the + * AC_VERB_SET_CONNECT_SEL even though it might be needed. Do + * it here instead. + * Note that when doing AC_VERB_SET_CONNECT_SEL, the + * connection is specified by index instead of nid. + */ + snd_hda_codec_write(codec, 0x17, 0, AC_VERB_SET_CONNECT_SEL, + 0x1); + snd_hda_codec_write(codec, 0x21, 0, AC_VERB_SET_CONNECT_SEL, + 0x1); + } else if (action == HDA_FIXUP_ACT_BUILD) { + rename_ctl(codec, "Headphone Playback Volume", + "Headphone/Bass Speaker Playback Volume"); + } +} + /* Hook to update amp GPIO4 for automute */ static void alc280_hp_gpio4_automute_hook(struct hda_codec *codec, struct hda_jack_callback *jack) @@ -6077,6 +6117,7 @@ enum { ALC225_FIXUP_DISABLE_MIC_VREF, ALC225_FIXUP_DELL1_MIC_NO_PRESENCE, ALC295_FIXUP_DISABLE_DAC3, + ALC295_FIXUP_TPX17_DUAL_SPEAKERS, ALC285_FIXUP_SPEAKER2_TO_DAC1, ALC280_FIXUP_HP_HEADSET_MIC, ALC221_FIXUP_HP_FRONT_MIC, @@ -6886,11 +6927,17 @@ static const struct hda_fixup alc269_fixups[] = { .type = HDA_FIXUP_FUNC, .v.func = alc295_fixup_disable_dac3, }, + [ALC295_FIXUP_TPX17_DUAL_SPEAKERS] = { + .type = HDA_FIXUP_FUNC, + .v.func = alc295_fixup_tpx17_dual_speakers, + .chained = true, + .chain_id = ALC285_FIXUP_THINKPAD_HEADSET_JACK + }, [ALC285_FIXUP_SPEAKER2_TO_DAC1] = { .type = HDA_FIXUP_FUNC, .v.func = alc285_fixup_speaker2_to_dac1, .chained = true, - .chain_id = ALC269_FIXUP_THINKPAD_ACPI + .chain_id = ALC285_FIXUP_THINKPAD_HEADSET_JACK }, [ALC256_FIXUP_DELL_INSPIRON_7559_SUBWOOFER] = { .type = HDA_FIXUP_PINS, @@ -7263,7 +7310,7 @@ static const struct hda_fixup alc269_fixups[] = { .type = HDA_FIXUP_FUNC, .v.func = alc_fixup_headset_jack, .chained = true, - .chain_id = ALC285_FIXUP_SPEAKER2_TO_DAC1 + .chain_id = ALC269_FIXUP_THINKPAD_ACPI }, [ALC294_FIXUP_ASUS_HPE] = { .type = HDA_FIXUP_VERBS, @@ -7559,8 +7606,8 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = { SND_PCI_QUIRK(0x17aa, 0x224c, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x224d, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x225d, "Thinkpad T480", ALC269_FIXUP_LIMIT_INT_MIC_BOOST), - SND_PCI_QUIRK(0x17aa, 0x2292, "Thinkpad X1 Carbon 7th", ALC285_FIXUP_THINKPAD_HEADSET_JACK), - SND_PCI_QUIRK(0x17aa, 0x22be, "Thinkpad X1 Carbon 8th", ALC285_FIXUP_THINKPAD_HEADSET_JACK), + SND_PCI_QUIRK(0x17aa, 0x2292, "Thinkpad X1 Carbon 7th", ALC295_FIXUP_TPX17_DUAL_SPEAKERS), + SND_PCI_QUIRK(0x17aa, 0x22be, "Thinkpad X1 Carbon 8th", ALC285_FIXUP_SPEAKER2_TO_DAC1), SND_PCI_QUIRK(0x17aa, 0x30bb, "ThinkCentre AIO", ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY), SND_PCI_QUIRK(0x17aa, 0x30e2, "ThinkCentre AIO", ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY), SND_PCI_QUIRK(0x17aa, 0x310c, "ThinkCentre Station", ALC294_FIXUP_LENOVO_MIC_LOCATION), @@ -7746,6 +7793,7 @@ static const struct hda_model_fixup alc269_fixup_models[] = { {.id = ALC255_FIXUP_DELL_SPK_NOISE, .name = "dell-spk-noise"}, {.id = ALC225_FIXUP_DELL1_MIC_NO_PRESENCE, .name = "alc225-dell1"}, {.id = ALC295_FIXUP_DISABLE_DAC3, .name = "alc295-disable-dac3"}, + {.id = ALC295_FIXUP_TPX17_DUAL_SPEAKERS, .name = "alc295-thinkpad-x1-gen7"}, {.id = ALC285_FIXUP_SPEAKER2_TO_DAC1, .name = "alc285-speaker2-to-dac1"}, {.id = ALC280_FIXUP_HP_HEADSET_MIC, .name = "alc280-hp-headset"}, {.id = ALC221_FIXUP_HP_FRONT_MIC, .name = "alc221-hp-mic"},