ALSA: hda/cirrus: Reduce codec resume time

This patch reduces the resume time by half and introduces an option to
include a delay after a single write operation before continuing.

Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>
Link: https://patch.msgid.link/20250214162354.2675652-2-vitalyr@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: Vitaly Rodionov

sound/pci/hda/patch_cs8409-tables.c

@@ -131,7 +131,7 @@ static const struct cs8409_i2c_param cs42l42_init_reg_seq[] = {
 	{ CS42L42_RSENSE_CTL3, 0x00 },
 	{ CS42L42_TSENSE_CTL, 0x80 },
 	{ CS42L42_HS_BIAS_CTL, 0xC0 },
-	{ CS42L42_PWR_CTL1, 0x02 },
+	{ CS42L42_PWR_CTL1, 0x02, 10000 },
 	{ CS42L42_ADC_OVFL_INT_MASK, 0xff },
 	{ CS42L42_MIXER_INT_MASK, 0xff },
 	{ CS42L42_SRC_INT_MASK, 0xff },
@@ -328,7 +328,7 @@ static const struct cs8409_i2c_param dolphin_c0_init_reg_seq[] = {
 	{ CS42L42_RSENSE_CTL3, 0x00 },
 	{ CS42L42_TSENSE_CTL, 0x80 },
 	{ CS42L42_HS_BIAS_CTL, 0xC0 },
-	{ CS42L42_PWR_CTL1, 0x02 },
+	{ CS42L42_PWR_CTL1, 0x02, 10000 },
 	{ CS42L42_ADC_OVFL_INT_MASK, 0xff },
 	{ CS42L42_MIXER_INT_MASK, 0xff },
 	{ CS42L42_SRC_INT_MASK, 0xff },
@@ -384,7 +384,7 @@ static const struct cs8409_i2c_param dolphin_c1_init_reg_seq[] = {
 	{ CS42L42_RSENSE_CTL3, 0x00 },
 	{ CS42L42_TSENSE_CTL, 0x80 },
 	{ CS42L42_HS_BIAS_CTL, 0xC0 },
-	{ CS42L42_PWR_CTL1, 0x06 },
+	{ CS42L42_PWR_CTL1, 0x06, 10000 },
 	{ CS42L42_ADC_OVFL_INT_MASK, 0xff },
 	{ CS42L42_MIXER_INT_MASK, 0xff },
 	{ CS42L42_SRC_INT_MASK, 0xff },

sound/pci/hda/patch_cs8409.c

@@ -346,6 +346,11 @@ static int cs8409_i2c_bulk_write(struct sub_codec *scodec, const struct cs8409_i
 
 		if (cs8409_i2c_wait_complete(codec) < 0)
 			goto error;
+		/* Certain use cases may require a delay
+		 * after a write operation before proceeding.
+		 */
+		if (seq[i].delay)
+			fsleep(seq[i].delay);
 	}
 
 	mutex_unlock(&spec->i2c_mux);
@@ -888,7 +893,6 @@ static void cs42l42_resume(struct sub_codec *cs42l42)
 
 	/* Initialize CS42L42 companion codec */
 	cs8409_i2c_bulk_write(cs42l42, cs42l42->init_seq, cs42l42->init_seq_num);
-	msleep(CS42L42_INIT_TIMEOUT_MS);
 
 	/* Clear interrupts, by reading interrupt status registers */
 	cs8409_i2c_bulk_read(cs42l42, irq_regs, ARRAY_SIZE(irq_regs));

sound/pci/hda/patch_cs8409.h

@@ -229,7 +229,6 @@ enum cs8409_coefficient_index_registers {
 #define CS42L42_I2C_SLEEP_US			(2000)
 #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		(0)
@@ -291,6 +290,7 @@ enum {
 struct cs8409_i2c_param {
 	unsigned int addr;
 	unsigned int value;
+	unsigned int delay;
 };
 
 struct cs8409_cir_param {