[PATCH 08/10][SRU][M] ALSA: hda: cs35l41: Do not unload firmware before reset in system suspend

[Chris Chiu]

From: Stefan Binding <sbinding at opensource.cirrus.com>

BugLink: https://bugs.launchpad.net/bugs/2042060

Given the part is about to reset due to system suspend, and we are
already in hibernate, there is no need to wake up the amp, just to get
it ready to be reset. We just need to ensure cs_dsp is ready for reset
by resetting the states.

Signed-off-by: Stefan Binding <sbinding at opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231026150558.2105827-7-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai at suse.de>
(cherry picked from commit 33790d1f039114a829433b89fc55a0d781d38d62)
Signed-off-by: Chris Chiu <chris.chiu at canonical.com>
---
 sound/pci/hda/cs35l41_hda.c | 33 ++++-----------------------------
 1 file changed, 4 insertions(+), 29 deletions(-)

diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index be74b3c5547b..3c88f71d97f4 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -695,41 +695,16 @@ int cs35l41_verify_id(struct cs35l41_hda *cs35l41, unsigned int *regid, unsigned
 
 static int cs35l41_ready_for_reset(struct cs35l41_hda *cs35l41)
 {
-	int ret = 0;
-
 	mutex_lock(&cs35l41->fw_mutex);
 	if (cs35l41->firmware_running) {
-
-		regcache_cache_only(cs35l41->regmap, false);
-
-		ret = cs35l41_exit_hibernate(cs35l41->dev, cs35l41->regmap);
-		if (ret) {
-			dev_warn(cs35l41->dev, "Unable to exit Hibernate.");
-			goto err;
-		}
-
-		/* Test key needs to be unlocked to allow the OTP settings to re-apply */
-		cs35l41_test_key_unlock(cs35l41->dev, cs35l41->regmap);
-		ret = regcache_sync(cs35l41->regmap);
-		cs35l41_test_key_lock(cs35l41->dev, cs35l41->regmap);
-		if (ret) {
-			dev_err(cs35l41->dev, "Failed to restore register cache: %d\n", ret);
-			goto err;
-		}
-
-		if (cs35l41->hw_cfg.bst_type == CS35L41_EXT_BOOST)
-			cs35l41_init_boost(cs35l41->dev, cs35l41->regmap, &cs35l41->hw_cfg);
-
-		cs35l41_shutdown_dsp(cs35l41);
-		cs35l41_safe_reset(cs35l41->regmap, cs35l41->hw_cfg.bst_type);
+		cs35l41->cs_dsp.running = false;
+		cs35l41->cs_dsp.booted = false;
+		cs35l41->firmware_running = false;
 	}
-err:
-	regcache_cache_only(cs35l41->regmap, true);
 	regcache_mark_dirty(cs35l41->regmap);
-
 	mutex_unlock(&cs35l41->fw_mutex);
 
-	return ret;
+	return 0;
 }
 
 static int cs35l41_system_suspend_prep(struct device *dev)
-- 
2.34.1