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Subject[PATCH v2 26/27] ALSA: hda/cs8409: Follow correct CS42L42 power down sequence for suspend
Date
From: Stefan Binding <sbinding@opensource.cirrus.com>

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>

Changes in v2:
- No changes

---
sound/pci/hda/patch_cs8409.c | 23 ++++++++++++++++++++++-
sound/pci/hda/patch_cs8409.h | 2 ++
2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/patch_cs8409.c b/sound/pci/hda/patch_cs8409.c
index 1e48337b782b..0baed8bebfbb 100644
--- a/sound/pci/hda/patch_cs8409.c
+++ b/sound/pci/hda/patch_cs8409.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <sound/core.h>
#include <linux/mutex.h>
+#include <linux/iopoll.h>

#include "patch_cs8409.h"

@@ -198,6 +199,7 @@ static int cs8409_i2c_read(struct sub_codec *scodec, unsigned int addr)
read_data = cs8409_vendor_coef_get(codec, CS8409_I2C_QREAD);

mutex_unlock(&spec->i2c_mux);
+
return read_data & 0x0ff;

error:
@@ -654,9 +656,28 @@ static void cs42l42_suspend(struct sub_codec *cs42l42)
{
struct hda_codec *codec = cs42l42->codec;
unsigned int gpio_data;
+ int reg_cdc_status = 0;
+ const struct cs8409_i2c_param cs42l42_pwr_down_seq[] = {
+ { 0x2301, 0x3F },
+ { 0x2302, 0x3F },
+ { 0x2303, 0x3F },
+ { 0x2001, 0x0F },
+ { 0x2A01, 0x00 },
+ { 0x1207, 0x00 },
+ { 0x1101, 0xFE },
+ { 0x1102, 0x8C },
+ { 0x1101, 0xFF },
+ };
+
+ cs8409_i2c_bulk_write(cs42l42, cs42l42_pwr_down_seq, ARRAY_SIZE(cs42l42_pwr_down_seq));
+
+ if (read_poll_timeout(cs8409_i2c_read, reg_cdc_status,
+ (reg_cdc_status & 0x1), CS42L42_PDN_SLEEP_US, CS42L42_PDN_TIMEOUT_US,
+ true, cs42l42, 0x1308) < 0)
+ codec_warn(codec, "Timeout waiting for PDN_DONE for CS42L42\n");

/* Power down CS42L42 ASP/EQ/MIX/HP */
- cs8409_i2c_write(cs42l42, 0x1101, 0xfe);
+ cs8409_i2c_write(cs42l42, 0x1102, 0x9C);
cs42l42->suspended = 1;
cs42l42->last_page = 0;

diff --git a/sound/pci/hda/patch_cs8409.h b/sound/pci/hda/patch_cs8409.h
index 71dbbd8e2f3b..09987daa9cbf 100644
--- a/sound/pci/hda/patch_cs8409.h
+++ b/sound/pci/hda/patch_cs8409.h
@@ -233,6 +233,8 @@ enum cs8409_coefficient_index_registers {
#define CS42L42_JACK_REMOVED (0x00)
#define CS42L42_I2C_TIMEOUT_US (20000)
#define CS42L42_I2C_SLEEP_US (2000)
+#define CS42L42_PDN_TIMEOUT_US (250000)
+#define CS42L42_PDN_SLEEP_US (2000)

/* Dell BULLSEYE / WARLOCK / CYBORG Specific Definitions */

--
2.25.1
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