Hello all, Here's an implementation of ACPI 6.4 _CRS CSI-2 resource descriptor and MIPI DisCo for Imaging 1.0 [1]. What the two basically provide is an officially sanctioned way to describe CSI-2 connected cameras to operating system software, something DT based systems have enjoyed for quite some time already. The implementation digs the information from ACPI tables (_CRS descriptors and data + property extensions) and constructs software nodes that are compatible with Documentation/firmware-guide/acpi/dsd/graph.rst and Documentation/devicetree/bindings/media/video-interface-devices.yaml . No specific driver changes are needed. These patches are on the testing branch of the linux-acpi tree where they depend on the patch constifying the ACPI pathname argument for acpi_get_handle() (commit 91fdb91ccca2b48572a1ccf1d382fd599e3e1237). [1] https://www.mipi.org/specifications/mipi-disco-imaging since v1: - Update copyright notices. - Include linux/types.h instead of linux/kernel.h in drivers/acpi/mipi.c. - Use SWNODE_GRAPH_PORT_NAME_FMT instead of plain "port@%u" in GRAPH_PORT_NAME macro. - Make the condition in NEXT_PROPERTY() macro easier to read. - Unwrap lines to make them moderately longer than 80 characters. - Use * BITS_PER_TYPE(u8) instead of << 3 to convert bytes to bits in init_port_csi2_common(). - Test ACPI framework call success using ACPI_SUCCESS() instead of comparing with AE_OK. Likewise for ACPI_FAILURE and != AE_OK. - Use newly added SOFTWARE_NODE() macro to construct the root software node. - Use str_has_prefix() to test for a string prefix instead of memcmp(). - Add pr_fmt() macro to drivers/acpi/property.c. - Move logical or operators to the end of the line in acpi_properties_prepare(). - Improve bad node type error in acpi_parse_string_ref(). Sakari Ailus (8): ACPI: property: Parse data node string references in properties ACPI: property: Parse _CRS CSI-2 descriptor device property: Add SOFTWARE_NODE() macro for defining software nodes ACPI: property: Generate camera swnodes for ACPI and DisCo for Imaging ACPI: property: Dig "rotation" property for devices with CSI2 _CRS ACPI: property: Rename parsed MIPI DisCo for Imaging properties ACPI: property: Skip MIPI property table without "mipi-img" prefix ACPI: property: Document _CRS CSI-2 and DisCo for Imaging support drivers/acpi/Makefile | 2 +- drivers/acpi/internal.h | 9 + drivers/acpi/mipi.c | 761 +++++++++++++++++++++++++++++++++++++++ drivers/acpi/property.c | 128 +++++-- drivers/acpi/scan.c | 33 +- include/acpi/acpi_bus.h | 61 ++++ include/linux/property.h | 7 + 7 files changed, 972 insertions(+), 29 deletions(-) create mode 100644 drivers/acpi/mipi.c -- 2.30.2
