linux-kernel - [PATCH] ALSA: hda/tas2781: reset the amp before component

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Message-ID: <4d23bf58558e23ee8097de01f70f1eb8d9de2d15.1702511246.git.soyer@irl.hu>
Date:   Thu, 14 Dec 2023 00:49:20 +0100
From:   Gergo Koteles <soyer@....hu>
To:     Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>,
        Baojun Xu <baojun.xu@...com>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>
Cc:     linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        Gergo Koteles <soyer@....hu>, stable@...r.kernel.org
Subject: [PATCH] ALSA: hda/tas2781: reset the amp before component_add

Calling component_add starts loading the firmware, the callback function
writes the program to the amplifiers. If the module resets the
amplifiers after component_add, it happens that one of the amplifiers
does not work because the reset and program writing are interleaving.

Call tas2781_reset before component_add to ensure reliable
initialization.

Fixes: 5be27f1e3ec9 ("ALSA: hda/tas2781: Add tas2781 HDA driver")
CC: stable@...r.kernel.org
Signed-off-by: Gergo Koteles <soyer@....hu>
---
 sound/pci/hda/tas2781_hda_i2c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/pci/hda/tas2781_hda_i2c.c b/sound/pci/hda/tas2781_hda_i2c.c
index fb802802939e..0baaaff94c6f 100644
--- a/sound/pci/hda/tas2781_hda_i2c.c
+++ b/sound/pci/hda/tas2781_hda_i2c.c
@@ -675,14 +675,14 @@ static int tas2781_hda_i2c_probe(struct i2c_client *clt)
 
 	pm_runtime_put_autosuspend(tas_priv->dev);
 
+	tas2781_reset(tas_priv);
+
 	ret = component_add(tas_priv->dev, &tas2781_hda_comp_ops);
 	if (ret) {
 		dev_err(tas_priv->dev, "Register component failed: %d\n", ret);
 		pm_runtime_disable(tas_priv->dev);
-		goto err;
 	}
 
-	tas2781_reset(tas_priv);
 err:
 	if (ret)
 		tas2781_hda_remove(&clt->dev);

base-commit: ffc253263a1375a65fa6c9f62a893e9767fbebfa
-- 
2.43.0