From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: linux-sound@vger.kernel.org
Cc: alsa-devel@alsa-project.org, tiwai@suse.de, broonie@kernel.org,
"Pierre-Louis Bossart" <pierre-louis.bossart@linux.intel.com>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Bard Liao" <yung-chuan.liao@linux.intel.com>,
"Péter Ujfalusi" <peter.ujfalusi@linux.intel.com>
Subject: [PATCH] ALSA: hda: intel-dsp-config: harden I2C/I2S codec detection
Date: Fri, 26 Apr 2024 10:28:18 -0500 [thread overview]
Message-ID: <20240426152818.38443-1-pierre-louis.bossart@linux.intel.com> (raw)
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>
---
sound/hda/intel-dsp-config.c | 27 +++++++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)
diff --git a/sound/hda/intel-dsp-config.c b/sound/hda/intel-dsp-config.c
index 6a384b922e4f..d1f6cdcf1866 100644
--- a/sound/hda/intel-dsp-config.c
+++ b/sound/hda/intel-dsp-config.c
@@ -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;
}
--
2.40.1
next reply other threads:[~2024-04-26 15:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-26 15:28 Pierre-Louis Bossart [this message]
2024-04-29 15:03 ` [PATCH] ALSA: hda: intel-dsp-config: harden I2C/I2S codec detection Takashi Iwai
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