[PATCH v8 07/10] ACPI: property: Dig "rotation" property for devices with CSI2 _CRS

[Sakari Ailus <sakari.ailus@linux.intel.com>]

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     | 17 +++++++++++++++++
 include/acpi/acpi_bus.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/drivers/acpi/mipi.c b/drivers/acpi/mipi.c
index 03079f78bd2c..0232cc123ead 100644
--- a/drivers/acpi/mipi.c
+++ b/drivers/acpi/mipi.c
@@ -652,10 +652,12 @@ 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 };
 	acpi_handle handle = acpi_device_handle(device);
 	struct fwnode_handle *primary;
+	unsigned int prop_index = 0;
 	acpi_status status;
 	unsigned int i;
 	int ret;
@@ -664,6 +666,21 @@ void acpi_init_swnodes(struct acpi_device *device)
 	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_present(fwnode, "rotation")) {
+		struct acpi_pld_info *pld;
+
+		status = acpi_get_physical_device_location(handle, &pld);
+		if (ACPI_SUCCESS(status)) {
+			ads->dev_props[NEXT_PROPERTY(prop_index, DEV_ROTATION)] =
+				PROPERTY_ENTRY_U32("rotation", pld->rotation * 45U);
+			kfree(pld);
+		}
+	}
+
 	status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
 	if (ACPI_FAILURE(status)) {
 		acpi_handle_warn(handle, "cannot get path name\n");
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 29d1e4d49d0c..83a89797a122 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