linux-kernel - [PATCH] ALSA: hda/tas2781: properly initialize speaker

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Message-Id: <20251222194704.87232-1-git@augustwikerfors.se>
Date: Mon, 22 Dec 2025 20:47:04 +0100
From: August Wikerfors <git@...ustwikerfors.se>
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: Antheas Kapenekakis <lkml@...heas.dev>, linux-sound@...r.kernel.org,
 linux-kernel@...r.kernel.org, August Wikerfors <git@...ustwikerfors.se>
Subject: [PATCH] ALSA: hda/tas2781: properly initialize speaker_id for
 TAS2563

After speaker id retrieval was refactored to happen in tas2781_read_acpi,
devices that do not use a speaker id need a negative speaker_id value
instead of NULL, but no initialization was added to the TAS2563 code path.
This causes the driver to attempt to load a non-existent firmware file name
with a speaker id of 0 ("TAS2XXX38700.bin") instead of the correct file
name without a speaker id ("TAS2XXX3870.bin"), resulting in low volume and
these dmesg errors:

    tas2781-hda i2c-INT8866:00: Direct firmware load for TAS2XXX38700.bin failed with error -2
    tas2781-hda i2c-INT8866:00: tasdevice_dsp_parser: load TAS2XXX38700.bin error
    tas2781-hda i2c-INT8866:00: dspfw load TAS2XXX38700.bin error
    [...]
    tas2781-hda i2c-INT8866:00: tasdevice_prmg_load: Firmware is NULL

Fix this by setting speaker_id to -1 as is done for other models.

Fixes: 945865a0ddf3 ("ALSA: hda/tas2781: fix speaker id retrieval for multiple probes")
Cc: stable@...r.kernel.org
Signed-off-by: August Wikerfors <git@...ustwikerfors.se>
---
 sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
index c8619995b1d7..f7a7f216d586 100644
--- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
+++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
@@ -111,8 +111,10 @@ static int tas2781_read_acpi(struct tasdevice_priv *p, const char *hid)
 	sub = acpi_get_subsystem_id(ACPI_HANDLE(physdev));
 	if (IS_ERR(sub)) {
 		/* No subsys id in older tas2563 projects. */
-		if (!strncmp(hid, "INT8866", sizeof("INT8866")))
+		if (!strncmp(hid, "INT8866", sizeof("INT8866"))) {
+			p->speaker_id = -1;
 			goto end_2563;
+		}
 		dev_err(p->dev, "Failed to get SUBSYS ID.\n");
 		ret = PTR_ERR(sub);
 		goto err;
-- 
2.52.0