mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

ALSA: hda: intel-dsp-config: harden I2C/I2S codec detection 

The SOF driver is selected whenever specific I2C/I2S HIDs are reported
as 'present' in the ACPI DSDT. In some cases, an HID is reported but
the hardware does not actually rely on I2C/I2S.  This false positive
leads to an invalid selection of the SOF driver and as a result an
invalid topology is loaded.

This patch hardens the detection with a check that the NHLT table is
consistent with the report of an I2S-based codec in DSDT. This table
should expose at least one SSP endpoint configured for an I2S-codec
connection.

Tested on Huawei Matebook D14 (NBLB-WAX9N) using an HDaudio codec with
an invalid ES8336 ACPI HID reported:

[    7.858249] snd_hda_intel 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040380
[    7.858312] snd_hda_intel 0000:00:1f.3: snd_intel_dsp_find_config: no valid SSP found for HID ESSX8336, skipped

Reported-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Tested-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Closes: https://github.com/thesofproject/linux/issues/4934
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Message-ID: <20240426152818.38443-1-pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Pierre-Louis Bossart 2024-04-26 10:28:18 -05:00 committed by Takashi Iwai
parent 2d5af3ab9e
commit 79ac4c1443
1 changed files with 25 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
sound/hda/intel-dsp-config.c
View File

@ -557,9 +557,32 @@ static const struct config_entry *snd_intel_dsp_find_config
if (table->codec_hid) {
int i;
for (i = 0; i < table->codec_hid->num_codecs; i++)
if (acpi_dev_present(table->codec_hid->codecs[i], NULL, -1))
for (i = 0; i < table->codec_hid->num_codecs; i++) {
struct nhlt_acpi_table *nhlt;
bool ssp_found = false;
if (!acpi_dev_present(table->codec_hid->codecs[i], NULL, -1))
continue;
nhlt = intel_nhlt_init(&pci->dev);
if (!nhlt) {
dev_warn(&pci->dev, "%s: NHLT table not found, skipped HID %s\n",
__func__, table->codec_hid->codecs[i]);
continue;
}
if (intel_nhlt_has_endpoint_type(nhlt, NHLT_LINK_SSP) &&
intel_nhlt_ssp_endpoint_mask(nhlt, NHLT_DEVICE_I2S))
ssp_found = true;
intel_nhlt_free(nhlt);
if (ssp_found)
break;
dev_warn(&pci->dev, "%s: no valid SSP found for HID %s, skipped\n",
__func__, table->codec_hid->codecs[i]);
}
if (i == table->codec_hid->num_codecs)
continue;
}