[PATCH] ALSA: hda/realtek: More robust component matching for CS35L41

[Takashi Iwai]

As the previous commit implies, a system may have a different SPI bus
number that is embedded in the device string.  And, assuming the fixed
bus number is rather fragile; it may be assigned differently depending
on the configuration or on the boot environment.  Once when a bus
number change happens, the binding fails, resulting in the silence.

This patch tries to make the matching a bit more relaxed, allowing to
bind with a different bus number (or without it).  So the previous
fix, the introduction of ALC245_FIXUP_CS35L41_SPI1_2 fixup became
superfluous, and this is unified to ALC245_FIXUP_CS35L41_SPI_2.

Fixes: 225f6e1bc151 ("ALSA: hda/realtek: Add quirk for HP Zbook Firefly 14 G9 model")
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/pci/hda/patch_realtek.c | 61 +++++++++++++++++++++--------------
 1 file changed, 36 insertions(+), 25 deletions(-)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 3dc19174670e..cd670884cfd0 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6704,23 +6704,51 @@ static void comp_generic_playback_hook(struct hda_pcm_stream *hinfo, struct hda_
 	}
 }
 
+struct cs35l41_dev_name {
+	const char *bus;
+	const char *hid;
+	int index;
+};
+
+/* match the device name in a slightly relaxed manner */
+static int comp_match_cs35l41_dev_name(struct device *dev, void *data)
+{
+	struct cs35l41_dev_name *p = data;
+	const char *d = dev_name(dev);
+	int n = strlen(p->bus);
+	char tmp[32];
+
+	/* check the bus name */
+	if (strncmp(d, p->bus, n))
+		return 0;
+	/* skip the bus number */
+	if (isdigit(d[n]))
+		n++;
+	/* the rest must be exact matching */
+	snprintf(tmp, sizeof(tmp), "-%s:00-cs35l41-hda.%d", p->hid, p->index);
+	return !strcmp(d + n, tmp);
+}
+
 static void cs35l41_generic_fixup(struct hda_codec *cdc, int action, const char *bus,
 				  const char *hid, int count)
 {
 	struct device *dev = hda_codec_dev(cdc);
 	struct alc_spec *spec = cdc->spec;
-	char *name;
+	struct cs35l41_dev_name *rec;
 	int ret, i;
 
 	switch (action) {
 	case HDA_FIXUP_ACT_PRE_PROBE:
 		for (i = 0; i < count; i++) {
-			name = devm_kasprintf(dev, GFP_KERNEL,
-					      "%s-%s:00-cs35l41-hda.%d", bus, hid, i);
-			if (!name)
+			rec = devm_kmalloc(dev, sizeof(*rec), GFP_KERNEL);
+			if (!rec)
 				return;
+			rec->bus = bus;
+			rec->hid = hid;
+			rec->index = i;
 			spec->comps[i].codec = cdc;
-			component_match_add(dev, &spec->match, component_compare_dev_name, name);
+			component_match_add(dev, &spec->match,
+					    comp_match_cs35l41_dev_name, rec);
 		}
 		ret = component_master_add_with_match(dev, &comp_master_ops, spec->match);
 		if (ret)
@@ -6738,17 +6766,12 @@ static void cs35l41_fixup_i2c_two(struct hda_codec *cdc, const struct hda_fixup
 
 static void cs35l41_fixup_spi_two(struct hda_codec *codec, const struct hda_fixup *fix, int action)
 {
-	cs35l41_generic_fixup(codec, action, "spi0", "CSC3551", 2);
-}
-
-static void cs35l41_fixup_spi1_two(struct hda_codec *codec, const struct hda_fixup *fix, int action)
-{
-	cs35l41_generic_fixup(codec, action, "spi1", "CSC3551", 2);
+	cs35l41_generic_fixup(codec, action, "spi", "CSC3551", 2);
 }
 
 static void cs35l41_fixup_spi_four(struct hda_codec *codec, const struct hda_fixup *fix, int action)
 {
-	cs35l41_generic_fixup(codec, action, "spi0", "CSC3551", 4);
+	cs35l41_generic_fixup(codec, action, "spi", "CSC3551", 4);
 }
 
 static void alc287_fixup_legion_16achg6_speakers(struct hda_codec *cdc, const struct hda_fixup *fix,
@@ -7137,8 +7160,6 @@ enum {
 	ALC287_FIXUP_CS35L41_I2C_2_HP_GPIO_LED,
 	ALC245_FIXUP_CS35L41_SPI_2,
 	ALC245_FIXUP_CS35L41_SPI_2_HP_GPIO_LED,
-	ALC245_FIXUP_CS35L41_SPI1_2,
-	ALC245_FIXUP_CS35L41_SPI1_2_HP_GPIO_LED,
 	ALC245_FIXUP_CS35L41_SPI_4,
 	ALC245_FIXUP_CS35L41_SPI_4_HP_GPIO_LED,
 	ALC285_FIXUP_HP_SPEAKERS_MICMUTE_LED,
@@ -8986,16 +9007,6 @@ static const struct hda_fixup alc269_fixups[] = {
 		.chained = true,
 		.chain_id = ALC285_FIXUP_HP_GPIO_LED,
 	},
-	[ALC245_FIXUP_CS35L41_SPI1_2] = {
-		.type = HDA_FIXUP_FUNC,
-		.v.func = cs35l41_fixup_spi1_two,
-	},
-	[ALC245_FIXUP_CS35L41_SPI1_2_HP_GPIO_LED] = {
-		.type = HDA_FIXUP_FUNC,
-		.v.func = cs35l41_fixup_spi1_two,
-		.chained = true,
-		.chain_id = ALC285_FIXUP_HP_GPIO_LED,
-	},
 	[ALC245_FIXUP_CS35L41_SPI_4] = {
 		.type = HDA_FIXUP_FUNC,
 		.v.func = cs35l41_fixup_spi_four,
@@ -9358,7 +9369,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x103c, 0x8aa3, "HP ProBook 450 G9 (MB 8AA1)", ALC236_FIXUP_HP_GPIO_LED),
 	SND_PCI_QUIRK(0x103c, 0x8aa8, "HP EliteBook 640 G9 (MB 8AA6)", ALC236_FIXUP_HP_GPIO_LED),
 	SND_PCI_QUIRK(0x103c, 0x8aab, "HP EliteBook 650 G9 (MB 8AA9)", ALC236_FIXUP_HP_GPIO_LED),
-	 SND_PCI_QUIRK(0x103c, 0x8abb, "HP ZBook Firefly 14 G9", ALC245_FIXUP_CS35L41_SPI1_2_HP_GPIO_LED),
+	 SND_PCI_QUIRK(0x103c, 0x8abb, "HP ZBook Firefly 14 G9", ALC245_FIXUP_CS35L41_SPI_2_HP_GPIO_LED),
 	SND_PCI_QUIRK(0x103c, 0x8ad1, "HP EliteBook 840 14 inch G9 Notebook PC", ALC245_FIXUP_CS35L41_SPI_2_HP_GPIO_LED),
 	SND_PCI_QUIRK(0x103c, 0x8ad2, "HP EliteBook 860 16 inch G9 Notebook PC", ALC245_FIXUP_CS35L41_SPI_2_HP_GPIO_LED),
 	SND_PCI_QUIRK(0x1043, 0x103e, "ASUS X540SA", ALC256_FIXUP_ASUS_MIC),
-- 
2.35.3