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ACPI: property: Dig "rotation" property for devices with CSI2 _CRS

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Find the "rotation" property value for devices with _CRS CSI-2 resource
descriptors and use it to add the "rotation" property to the software
nodes representing the CSI-2 connection graph.  That value typically
comes from the _PLD (Physical Location of Device) object if it is
present for the given device.

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

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
[ rjw: Changelog edits, file rename ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
This commit is contained in:
Sakari Ailus 2023-11-06 17:28:40 +01:00 committed by Rafael J. Wysocki
parent a6cb0a6112
commit f533e43a2a
2 changed files with 18 additions and 0 deletions
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17
drivers/acpi/mipi-disco-img.c
View file

@ -595,6 +595,7 @@ static void init_crs_csi2_swnodes(struct crs_csi2 *csi2)
struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER };
struct acpi_device_software_nodes *swnodes = csi2->swnodes;
acpi_handle handle = csi2->handle;
unsigned int prop_index = 0;
struct fwnode_handle *adev_fwnode;
struct acpi_device *adev;
acpi_status status;
@ -614,6 +615,22 @@ static void init_crs_csi2_swnodes(struct crs_csi2 *csi2)
adev_fwnode = acpi_fwnode_handle(adev);
/*
* If the "rotation" property is not present, but _PLD is there,
* evaluate it to get the "rotation" value.
*/
if (!fwnode_property_present(adev_fwnode, "rotation")) {
struct acpi_pld_info *pld;
status = acpi_get_physical_device_location(handle, &pld);
if (ACPI_SUCCESS(status)) {
swnodes->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_info(handle, "Unable to get the path name\n");

1
include/acpi/acpi_bus.h
View file

@ -380,6 +380,7 @@ struct acpi_gpio_mapping;
#define ACPI_DEVICE_SWNODE_PORT_NAME_LENGTH 8
enum acpi_device_swnode_dev_props {
ACPI_DEVICE_SWNODE_DEV_ROTATION,
ACPI_DEVICE_SWNODE_DEV_NUM_OF,
ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES
};