From: Stefan Binding sbinding@opensource.cirrus.com
[ Upstream commit 1d44a30ae3f9195cb4eb7d81bb9ced2776232094 ]
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.... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/cs35l41.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-)
diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c index e91c1a4640e46..40b71d29b3910 100644 --- a/sound/soc/codecs/cs35l41.c +++ b/sound/soc/codecs/cs35l41.c @@ -1157,19 +1157,28 @@ static int cs35l41_dsp_init(struct cs35l41_private *cs35l41)
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); }