linux-kernel - [PATCH 2/9] ALSA: hda/cs35l56: Do not mark cache dirty after REINIT

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Message-ID: <20230731165726.7940-3-rf@opensource.cirrus.com>
Date:   Mon, 31 Jul 2023 17:57:19 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <tiwai@...e.com>
CC:     <perex@...ex.cz>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH 2/9] ALSA: hda/cs35l56: Do not mark cache dirty after REINIT

Only call regcache_mark_dirty() in cs35l56_hda_fw_load() if
the CS35L56 was SYSTEM_RESET.

recache_mark_dirty() changes the behaviour of regcache_sync()
to write out cache values that are not the default value, and
skip cache values that are the default.

AUDIO_REINIT does not reset the registers. regcache_mark_dirty()
after AUDIO_REINIT could cause the regcache_sync() to sync
registers incorrectly because it will assume that all registers
have reset to default.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 sound/pci/hda/cs35l56_hda.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/hda/cs35l56_hda.c b/sound/pci/hda/cs35l56_hda.c
index c3acda2daeeb..fda716e0db09 100644
--- a/sound/pci/hda/cs35l56_hda.c
+++ b/sound/pci/hda/cs35l56_hda.c
@@ -569,6 +569,7 @@ static int cs35l56_hda_fw_load(struct cs35l56_hda *cs35l56)
 	} else {
 		/* Reset the device and wait for it to boot */
 		cs35l56_system_reset(&cs35l56->base, false);
+		regcache_mark_dirty(cs35l56->base.regmap);
 		ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
 		if (ret)
 			goto err;
@@ -579,7 +580,6 @@ static int cs35l56_hda_fw_load(struct cs35l56_hda *cs35l56)
 	if (ret)
 		goto err;
 
-	regcache_mark_dirty(cs35l56->base.regmap);
 	regcache_sync(cs35l56->base.regmap);
 
 	regmap_clear_bits(cs35l56->base.regmap, CS35L56_PROTECTION_STATUS,
-- 
2.30.2