ALSA: hda/cirrus: Correct the full scale volume set logic

This patch corrects the full-scale volume setting logic. On certain
platforms, the full-scale volume bit is required. The current logic
mistakenly sets this bit and incorrectly clears reserved bit 0, causing
the headphone output to be muted.

Fixes: 342b6b6 ("ALSA: hda/cs8409: Fix Full Scale Volume setting for all variants")
Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>
Link: https://patch.msgid.link/20250214210736.30814-1-vitalyr@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_cs8409-tables.c

@@ -121,7 +121,7 @@ static const struct cs8409_i2c_param cs42l42_init_reg_seq[] = {
 	{ CS42L42_MIXER_CHA_VOL, 0x3F },
 	{ CS42L42_MIXER_CHB_VOL, 0x3F },
 	{ CS42L42_MIXER_ADC_VOL, 0x3f },
-	{ CS42L42_HP_CTL, 0x03 },
+	{ CS42L42_HP_CTL, 0x0D },
 	{ CS42L42_MIC_DET_CTL1, 0xB6 },
 	{ CS42L42_TIPSENSE_CTL, 0xC2 },
 	{ CS42L42_HS_CLAMP_DISABLE, 0x01 },
@@ -315,7 +315,7 @@ static const struct cs8409_i2c_param dolphin_c0_init_reg_seq[] = {
 	{ CS42L42_ASP_TX_SZ_EN, 0x01 },
 	{ CS42L42_PWR_CTL1, 0x0A },
 	{ CS42L42_PWR_CTL2, 0x84 },
-	{ CS42L42_HP_CTL, 0x03 },
+	{ CS42L42_HP_CTL, 0x0D },
 	{ CS42L42_MIXER_CHA_VOL, 0x3F },
 	{ CS42L42_MIXER_CHB_VOL, 0x3F },
 	{ CS42L42_MIXER_ADC_VOL, 0x3f },
@@ -371,7 +371,7 @@ static const struct cs8409_i2c_param dolphin_c1_init_reg_seq[] = {
 	{ CS42L42_ASP_TX_SZ_EN, 0x00 },
 	{ CS42L42_PWR_CTL1, 0x0E },
 	{ CS42L42_PWR_CTL2, 0x84 },
-	{ CS42L42_HP_CTL, 0x01 },
+	{ CS42L42_HP_CTL, 0x0D },
 	{ CS42L42_MIXER_CHA_VOL, 0x3F },
 	{ CS42L42_MIXER_CHB_VOL, 0x3F },
 	{ CS42L42_MIXER_ADC_VOL, 0x3f },

sound/pci/hda/patch_cs8409.c

@@ -876,7 +876,7 @@ static void cs42l42_resume(struct sub_codec *cs42l42)
 		{ CS42L42_DET_INT_STATUS2, 0x00 },
 		{ CS42L42_TSRS_PLUG_STATUS, 0x00 },
 	};
-	int fsv_old, fsv_new;
+	unsigned int fsv;
 
 	/* Bring CS42L42 out of Reset */
 	spec->gpio_data = snd_hda_codec_read(codec, CS8409_PIN_AFG, 0, AC_VERB_GET_GPIO_DATA, 0);
@@ -893,13 +893,15 @@ static void cs42l42_resume(struct sub_codec *cs42l42)
 	/* Clear interrupts, by reading interrupt status registers */
 	cs8409_i2c_bulk_read(cs42l42, irq_regs, ARRAY_SIZE(irq_regs));
 
-	fsv_old = cs8409_i2c_read(cs42l42, CS42L42_HP_CTL);
-	if (cs42l42->full_scale_vol == CS42L42_FULL_SCALE_VOL_0DB)
-		fsv_new = fsv_old & ~CS42L42_FULL_SCALE_VOL_MASK;
-	else
-		fsv_new = fsv_old & CS42L42_FULL_SCALE_VOL_MASK;
-	if (fsv_new != fsv_old)
-		cs8409_i2c_write(cs42l42, CS42L42_HP_CTL, fsv_new);
+	fsv = cs8409_i2c_read(cs42l42, CS42L42_HP_CTL);
+	if (cs42l42->full_scale_vol) {
+		// Set the full scale volume bit
+		fsv |= CS42L42_FULL_SCALE_VOL_MASK;
+		cs8409_i2c_write(cs42l42, CS42L42_HP_CTL, fsv);
+	}
+	// Unmute analog channels A and B
+	fsv = (fsv & ~CS42L42_ANA_MUTE_AB);
+	cs8409_i2c_write(cs42l42, CS42L42_HP_CTL, fsv);
 
 	/* we have to explicitly allow unsol event handling even during the
 	 * resume phase so that the jack event is processed properly
@@ -920,7 +922,7 @@ static void cs42l42_suspend(struct sub_codec *cs42l42)
 		{ CS42L42_MIXER_CHA_VOL, 0x3F },
 		{ CS42L42_MIXER_ADC_VOL, 0x3F },
 		{ CS42L42_MIXER_CHB_VOL, 0x3F },
-		{ CS42L42_HP_CTL, 0x0F },
+		{ CS42L42_HP_CTL, 0x0D },
 		{ CS42L42_ASP_RX_DAI0_EN, 0x00 },
 		{ CS42L42_ASP_CLK_CFG, 0x00 },
 		{ CS42L42_PWR_CTL1, 0xFE },

sound/pci/hda/patch_cs8409.h

@@ -230,9 +230,10 @@ enum cs8409_coefficient_index_registers {
 #define CS42L42_PDN_TIMEOUT_US			(250000)
 #define CS42L42_PDN_SLEEP_US			(2000)
 #define CS42L42_INIT_TIMEOUT_MS			(45)
+#define CS42L42_ANA_MUTE_AB			(0x0C)
 #define CS42L42_FULL_SCALE_VOL_MASK		(2)
-#define CS42L42_FULL_SCALE_VOL_0DB		(1)
-#define CS42L42_FULL_SCALE_VOL_MINUS6DB		(0)
+#define CS42L42_FULL_SCALE_VOL_0DB		(0)
+#define CS42L42_FULL_SCALE_VOL_MINUS6DB		(1)
 
 /* Dell BULLSEYE / WARLOCK / CYBORG Specific Definitions */