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Subject[PATCH 5.2 198/313] ALSA: hda - Add a quirk model for fixing Huawei Matebook X right speaker
Date
From: Tomas Espeleta <tomas.espeleta@gmail.com>

[ Upstream commit a2ef03fe617a8365fb7794531b11ba587509a9b9 ]

[ This is rather a revival of the patch Tomas sent in months ago, but
applying only with the quirk model option -- tiwai ]

Hard coded coefficients to make Huawuei Matebook X right speaker
work. The Matebook X has a ALC298, please refer to bug 197801 on
how these numbers were reverse engineered from the Windows driver

The reversed engineered sequence represents a repeating pattern
of verbs, and the only values that are changing periodically are
written on indexes 0x23 and 0x25:

0x500, 0x23
0x400, VALUE1
0x500, 0x25
0x400, VALUE2

* skipped reading sequences (0x500 - 0xc00 sequences are ignored)
* static values from reverse engineering are used

NOTE: since a significant risk is still considered, this is provided
as an experimental fix that isn't applied as default for now. For
enabling the fix, you'll have to choose huawei-mbx-stereo via model
option of snd-hda-intel module.

If we get feedback from users that this works stably, we may apply it
per default.

[ Some coding style fixes and replacement with AC_VERB_* by tiwai ]

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=197801
Signed-off-by: Tomas Espeleta <tomas.espeleta@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
Documentation/sound/hd-audio/models.rst | 3 +
sound/pci/hda/patch_realtek.c | 74 +++++++++++++++++++++++++
2 files changed, 77 insertions(+)

diff --git a/Documentation/sound/hd-audio/models.rst b/Documentation/sound/hd-audio/models.rst
index 7d7c191102a73..11298f0ce44db 100644
--- a/Documentation/sound/hd-audio/models.rst
+++ b/Documentation/sound/hd-audio/models.rst
@@ -260,6 +260,9 @@ alc295-hp-x360
HP Spectre X360 fixups
alc-sense-combo
Headset button support for Chrome platform
+huawei-mbx-stereo
+ Enable initialization verbs for Huawei MBX stereo speakers;
+ might be risky, try this at your own risk

ALC66x/67x/892
==============
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index c1ddfd2fac522..1bec62720374d 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3755,6 +3755,72 @@ static void alc269_x101_hp_automute_hook(struct hda_codec *codec,
vref);
}

+/*
+ * Magic sequence to make Huawei Matebook X right speaker working (bko#197801)
+ */
+struct hda_alc298_mbxinit {
+ unsigned char value_0x23;
+ unsigned char value_0x25;
+};
+
+static void alc298_huawei_mbx_stereo_seq(struct hda_codec *codec,
+ const struct hda_alc298_mbxinit *initval,
+ bool first)
+{
+ snd_hda_codec_write(codec, 0x06, 0, AC_VERB_SET_DIGI_CONVERT_3, 0x0);
+ alc_write_coef_idx(codec, 0x26, 0xb000);
+
+ if (first)
+ snd_hda_codec_write(codec, 0x21, 0, AC_VERB_GET_PIN_SENSE, 0x0);
+
+ snd_hda_codec_write(codec, 0x6, 0, AC_VERB_SET_DIGI_CONVERT_3, 0x80);
+ alc_write_coef_idx(codec, 0x26, 0xf000);
+ alc_write_coef_idx(codec, 0x23, initval->value_0x23);
+
+ if (initval->value_0x23 != 0x1e)
+ alc_write_coef_idx(codec, 0x25, initval->value_0x25);
+
+ snd_hda_codec_write(codec, 0x20, 0, AC_VERB_SET_COEF_INDEX, 0x26);
+ snd_hda_codec_write(codec, 0x20, 0, AC_VERB_SET_PROC_COEF, 0xb010);
+}
+
+static void alc298_fixup_huawei_mbx_stereo(struct hda_codec *codec,
+ const struct hda_fixup *fix,
+ int action)
+{
+ /* Initialization magic */
+ static const struct hda_alc298_mbxinit dac_init[] = {
+ {0x0c, 0x00}, {0x0d, 0x00}, {0x0e, 0x00}, {0x0f, 0x00},
+ {0x10, 0x00}, {0x1a, 0x40}, {0x1b, 0x82}, {0x1c, 0x00},
+ {0x1d, 0x00}, {0x1e, 0x00}, {0x1f, 0x00},
+ {0x20, 0xc2}, {0x21, 0xc8}, {0x22, 0x26}, {0x23, 0x24},
+ {0x27, 0xff}, {0x28, 0xff}, {0x29, 0xff}, {0x2a, 0x8f},
+ {0x2b, 0x02}, {0x2c, 0x48}, {0x2d, 0x34}, {0x2e, 0x00},
+ {0x2f, 0x00},
+ {0x30, 0x00}, {0x31, 0x00}, {0x32, 0x00}, {0x33, 0x00},
+ {0x34, 0x00}, {0x35, 0x01}, {0x36, 0x93}, {0x37, 0x0c},
+ {0x38, 0x00}, {0x39, 0x00}, {0x3a, 0xf8}, {0x38, 0x80},
+ {}
+ };
+ const struct hda_alc298_mbxinit *seq;
+
+ if (action != HDA_FIXUP_ACT_INIT)
+ return;
+
+ /* Start */
+ snd_hda_codec_write(codec, 0x06, 0, AC_VERB_SET_DIGI_CONVERT_3, 0x00);
+ snd_hda_codec_write(codec, 0x06, 0, AC_VERB_SET_DIGI_CONVERT_3, 0x80);
+ alc_write_coef_idx(codec, 0x26, 0xf000);
+ alc_write_coef_idx(codec, 0x22, 0x31);
+ alc_write_coef_idx(codec, 0x23, 0x0b);
+ alc_write_coef_idx(codec, 0x25, 0x00);
+ snd_hda_codec_write(codec, 0x20, 0, AC_VERB_SET_COEF_INDEX, 0x26);
+ snd_hda_codec_write(codec, 0x20, 0, AC_VERB_SET_PROC_COEF, 0xb010);
+
+ for (seq = dac_init; seq->value_0x23; seq++)
+ alc298_huawei_mbx_stereo_seq(codec, seq, seq == dac_init);
+}
+
static void alc269_fixup_x101_headset_mic(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
@@ -5780,6 +5846,7 @@ enum {
ALC255_FIXUP_DUMMY_LINEOUT_VERB,
ALC255_FIXUP_DELL_HEADSET_MIC,
ALC256_FIXUP_HUAWEI_MACH_WX9_PINS,
+ ALC298_FIXUP_HUAWEI_MBX_STEREO,
ALC295_FIXUP_HP_X360,
ALC221_FIXUP_HP_HEADSET_MIC,
ALC285_FIXUP_LENOVO_HEADPHONE_NOISE,
@@ -6089,6 +6156,12 @@ static const struct hda_fixup alc269_fixups[] = {
.chained = true,
.chain_id = ALC255_FIXUP_MIC_MUTE_LED
},
+ [ALC298_FIXUP_HUAWEI_MBX_STEREO] = {
+ .type = HDA_FIXUP_FUNC,
+ .v.func = alc298_fixup_huawei_mbx_stereo,
+ .chained = true,
+ .chain_id = ALC255_FIXUP_MIC_MUTE_LED
+ },
[ALC269_FIXUP_ASUS_X101_FUNC] = {
.type = HDA_FIXUP_FUNC,
.v.func = alc269_fixup_x101_headset_mic,
@@ -7280,6 +7353,7 @@ static const struct hda_model_fixup alc269_fixup_models[] = {
{.id = ALC225_FIXUP_HEADSET_JACK, .name = "alc-headset-jack"},
{.id = ALC295_FIXUP_CHROME_BOOK, .name = "alc-chrome-book"},
{.id = ALC299_FIXUP_PREDATOR_SPK, .name = "predator-spk"},
+ {.id = ALC298_FIXUP_HUAWEI_MBX_STEREO, .name = "huawei-mbx-stereo"},
{}
};
#define ALC225_STANDARD_PINS \
--
2.20.1


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