diff options
| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2026-01-21 13:22:39 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2026-01-21 13:41:20 +0000 |
| commit | 00fd40bc7acecf9f41d645aa0b35ddc7fd7679b6 (patch) | |
| tree | b46f6d96a3c7caa29d98ebb762f42343e69a56fd /include | |
| parent | 9ef552fcf0e0fbc0d8a7d6a5903a08a90eb97f34 (diff) | |
ASoC: cs-amp-lib: Support Dell SSIDExV2 UEFI variable
Add a function cs_amp_devm_get_vendor_specific_variant_id() to return
a vendor-specific hardware identifier string (if there is one) and use
it to fetch an identifier from Dell SSIDExV2 UEFI variable content.
Dell use the same PCI SSID on multiple products that might have different
audio hardware and thus need different firmware for the amplifier DSP.
The SSIDExV2 string contains additional system identifiers, and the
second field is a 2-character audio hardware identifier.
There are older Dell models with Cirrus Logic amplifiers that have the
SSIDExV2 UEFI variable but do not have the 2-character audio ID in the
second field. The SSIDExV2 is ignored if the second field is not
2 characters.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20260121132243.1256019-2-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/cs-amp-lib.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/sound/cs-amp-lib.h b/include/sound/cs-amp-lib.h index 61e00017c9aa..e9aa86d76049 100644 --- a/include/sound/cs-amp-lib.h +++ b/include/sound/cs-amp-lib.h @@ -58,6 +58,9 @@ int cs_amp_get_efi_calibration_data(struct device *dev, u64 target_uid, int amp_ int cs_amp_set_efi_calibration_data(struct device *dev, int amp_index, int num_amps, const struct cirrus_amp_cal_data *in_data); int cs_amp_get_vendor_spkid(struct device *dev); +const char *cs_amp_devm_get_vendor_specific_variant_id(struct device *dev, + int ssid_vendor, + int ssid_device); struct dentry *cs_amp_create_debugfs(struct device *dev); static inline u64 cs_amp_cal_target_u64(const struct cirrus_amp_cal_data *data) |