[PATCH v3 5/8] ACPI: property: Dig "rotation" property for devices with CSI2 _CRS

Sakari Ailus
2023-01-25T22:41:33Z

Dig "rotation" property value for devices with _CRS CSI2 resource
descriptor. The value comes from _PLD (physical location of device)
object, if it exists for the device.

This way camera sensor drivers that know the "rotation" property do not
need to care about _PLD on ACPI.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
drivers/acpi/mipi.c | 16 ++++++++++++++++
include/acpi/acpi_bus.h | 1 +
2 files changed, 17 insertions(+)

diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c
index 5dbdf33a13831..b81bfa1edd8ad 100644
--- a/drivers/acpi/mipi.c
+++ b/drivers/acpi/mipi.c
@@ -629,16 +629,32 @@ static void init_port_csi2_remote(struct acpi_device *device,
*/
void acpi_init_swnodes(struct acpi_device *device)
{
+ struct fwnode_handle *fwnode = acpi_fwnode_handle(device);
struct acpi_device_software_nodes *ads;
struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER };
struct fwnode_handle *primary;
+ struct acpi_pld_info *pld;
+ unsigned int prop_index = 0;
unsigned int i;
+ u32 val;
int ret;

device->swnodes = ads = crs_csi2_swnode_get(device->handle);
if (!ads)
return;

+ /*
+ * Check if "rotation" property exists and if it doesn't but there's a
+ * _PLD object, then get the rotation value from there.
+ */
+ if (fwnode_property_read_u32(fwnode, "rotation", &val) &&
+ ACPI_SUCCESS(acpi_get_physical_device_location(acpi_device_handle(device),
+ &pld))) {
+ ads->dev_props[NEXT_PROPERTY(prop_index, DEV_ROTATION)] =
+ PROPERTY_ENTRY_U32("rotation", pld->rotation * 45U);
+ kfree(pld);
+ }
+
if (ACPI_FAILURE(acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer))) {
acpi_handle_warn(acpi_device_handle(device), "cannot get path name\n");
return;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 9a7729e96d14c..3c4a1daed33f1 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -361,6 +361,7 @@ struct acpi_device_data {
struct acpi_gpio_mapping;

enum acpi_device_swnode_dev_props {
+ ACPI_DEVICE_SWNODE_DEV_ROTATION,
ACPI_DEVICE_SWNODE_DEV_NUM_OF,
ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES
};
--
2.30.2