linux-kernel - [PATCH 25/27] ALSA: hda/cs8409: Remove unnecessary delays

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Date:   Mon, 26 Jul 2021 18:46:38 +0100
From:   Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
To:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC:     <alsa-devel@...a-project.org>, <patches@...nsource.cirrus.com>,
        <linux-kernel@...r.kernel.org>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH 25/27] ALSA: hda/cs8409: Remove unnecessary delays

From: Stefan Binding <sbinding@...nsource.cirrus.com>

Since delays when starting jack detection after initialization
have been reduced/removed, it is necessary to add back in an extra
20ms delay after the init sequence to allow the CS42L42 to power up
correctly.

Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
---
 sound/pci/hda/patch_cs8409.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/sound/pci/hda/patch_cs8409.c b/sound/pci/hda/patch_cs8409.c
index e0ea27124985..54780b008547 100644
--- a/sound/pci/hda/patch_cs8409.c
+++ b/sound/pci/hda/patch_cs8409.c
@@ -517,12 +517,10 @@ static void cs42l42_run_jack_detect(struct sub_codec *cs42l42)
 	cs8409_i2c_write(cs42l42, 0x1b74, 0x07);
 	cs8409_i2c_write(cs42l42, 0x131b, 0xFD);
 	cs8409_i2c_write(cs42l42, 0x1120, 0x80);
-	/* Wait ~110ms*/
-	usleep_range(110000, 200000);
+	/* Wait ~100us*/
+	usleep_range(100, 200);
 	cs8409_i2c_write(cs42l42, 0x111f, 0x77);
 	cs8409_i2c_write(cs42l42, 0x1120, 0xc0);
-	/* Wait ~10ms */
-	usleep_range(10000, 25000);
 }
 
 static int cs42l42_handle_tip_sense(struct sub_codec *cs42l42, unsigned int reg_ts_status)
@@ -629,6 +627,7 @@ static void cs42l42_resume(struct sub_codec *cs42l42)
 
 	/* Initialize CS42L42 companion codec */
 	cs8409_i2c_bulk_write(cs42l42, cs42l42->init_seq, cs42l42->init_seq_num);
+	usleep_range(20000, 25000);
 
 	/* Clear interrupts, by reading interrupt status registers */
 	cs8409_i2c_bulk_read(cs42l42, irq_regs, ARRAY_SIZE(irq_regs));
@@ -888,7 +887,6 @@ void cs8409_cs42l42_fixups(struct hda_codec *codec, const struct hda_fixup *fix,
 		 * Run immediately after init.
 		 */
 		cs42l42_run_jack_detect(spec->scodecs[CS8409_CODEC0]);
-		usleep_range(100000, 150000);
 		break;
 	default:
 		break;
@@ -1083,10 +1081,8 @@ void dolphin_fixups(struct hda_codec *codec, const struct hda_fixup *fix, int ac
 		 * been already plugged in.
 		 * Run immediately after init.
 		 */
-		for (i = 0; i < spec->num_scodecs; i++) {
+		for (i = 0; i < spec->num_scodecs; i++)
 			cs42l42_run_jack_detect(spec->scodecs[i]);
-			usleep_range(100000, 150000);
-		}
 
 		break;
 	default:
-- 
2.25.1