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ASoC: cs35l41: Fallback to using HID for system_name if no SUB is available

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For systems which load firmware on the cs35l41 which use ACPI, the
_SUB value is used to differentiate firmware and tuning files for the
individual systems. In the case where a system does not have a _SUB
defined in ACPI node for cs35l41, there needs to be a fallback to
allow the files for that system to be differentiated. Since all
ACPI nodes for cs35l41 should have a HID defined, the HID should be a
safe option.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Reviewed-by: André Almeida <andrealmeid@igalia.com>
Tested-by: André Almeida <andrealmeid@igalia.com>
Link: https://patch.msgid.link/20250205164806.414020-1-sbinding@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Stefan Binding 2025-02-05 16:48:04 +00:00 • committed by Mark Brown
parent 679074942c
commit 1d44a30ae3
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GPG key ID: 24D68B725D5487D0
1 changed files with 16 additions and 7 deletions
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23
sound/soc/codecs/cs35l41.c
View file

@ -1150,19 +1150,28 @@ err_dsp:
static int cs35l41_acpi_get_name(struct cs35l41_private *cs35l41)
{
acpi_handle handle = ACPI_HANDLE(cs35l41->dev);
struct acpi_device *adev = ACPI_COMPANION(cs35l41->dev);
acpi_handle handle = acpi_device_handle(adev);
const char *hid;
const char *sub;
/* If there is no ACPI_HANDLE, there is no ACPI for this system, return 0 */
if (!handle)
/* If there is no acpi_device, there is no ACPI for this system, return 0 */
if (!adev)
return 0;
sub = acpi_get_subsystem_id(handle);
if (IS_ERR(sub)) {
/* If bad ACPI, return 0 and fallback to legacy firmware path, otherwise fail */
if (PTR_ERR(sub) == -ENODATA)
return 0;
else
/* If no _SUB, fallback to _HID, otherwise fail */
if (PTR_ERR(sub) == -ENODATA) {
hid = acpi_device_hid(adev);
/* If dummy hid, return 0 and fallback to legacy firmware path */
if (!strcmp(hid, "device"))
return 0;
sub = kstrdup(hid, GFP_KERNEL);
if (!sub)
sub = ERR_PTR(-ENOMEM);
} else
return PTR_ERR(sub);
}