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authorStefan Binding <sbinding@opensource.cirrus.com>2023-10-26 16:05:52 +0100
committerTakashi Iwai <tiwai@suse.de>2023-10-26 17:55:18 +0200
commita7423e9019a9a595919da44104725eef8a518652 (patch)
treea020b674faeaab25842a22f47c9a21e9cc3fc399 /sound
parentf01b371b0794f43586d4f0b7dd0d9226c25553e5 (diff)
ALSA: hda: cs35l41: Assert reset before system suspend
Some system suspend modes may remove power supplies. To ensure we are not running during this time, we should assert reset. Note: since the amps use a shared reset, asserting reset prior to system suspend only works if the amps are suspended in the reverse order to probe. Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> Link: https://lore.kernel.org/r/20231026150558.2105827-3-sbinding@opensource.cirrus.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/cs35l41_hda.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index 28cb10ddd191..919e38213975 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -813,14 +813,17 @@ static int cs35l41_system_suspend(struct device *dev)
/* Shutdown DSP before system suspend */
ret = cs35l41_ready_for_reset(cs35l41);
-
if (ret)
dev_err(dev, "System Suspend Failed, not ready for Reset: %d\n", ret);
- /*
- * Reset GPIO may be shared, so cannot reset here.
- * However beyond this point, amps may be powered down.
- */
+ if (cs35l41->reset_gpio) {
+ dev_info(cs35l41->dev, "Asserting Reset\n");
+ gpiod_set_value_cansleep(cs35l41->reset_gpio, 0);
+ usleep_range(2000, 2100);
+ }
+
+ dev_dbg(cs35l41->dev, "System Suspended\n");
+
return ret;
}