drivers/intel/mipi_camera: SSDT changes to add DSM
This change updates mipi_camera driver to add DSM section to SSDT.
Change-Id: Ic60e972b6aebad171a7b77fe0d99781693adfb20
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42468
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/intel/mipi_camera/camera.c b/src/drivers/intel/mipi_camera/camera.c
index 5230a2a..c4cacce 100644
--- a/src/drivers/intel/mipi_camera/camera.c
+++ b/src/drivers/intel/mipi_camera/camera.c
@@ -14,6 +14,88 @@
#define SENSOR_TYPE_UUID "26257549-9271-4ca4-bb43-c4899d5a4881"
#define DEFAULT_ENDPOINT 0
+static uint32_t address_for_dev_type(const struct device *dev, uint8_t dev_type)
+{
+ struct drivers_intel_mipi_camera_config *config = dev->chip_info;
+ uint16_t i2c_bus = dev->bus ? dev->bus->secondary : 0xFFFF;
+ uint16_t i2c_addr;
+
+ switch (dev_type) {
+ case DEV_TYPE_SENSOR:
+ i2c_addr = dev->path.i2c.device;
+ break;
+ case DEV_TYPE_VCM:
+ i2c_addr = config->vcm_address;
+ break;
+ case DEV_TYPE_ROM:
+ i2c_addr = config->rom_address;
+ break;
+ default:
+ return 0;
+ }
+
+ return (((uint32_t)i2c_bus) << 24 | ((uint32_t)i2c_addr) << 8 | dev_type);
+}
+
+static void camera_generate_dsm(const struct device *dev)
+{
+ struct drivers_intel_mipi_camera_config *config = dev->chip_info;
+ int local1_ret = 1 + (config->ssdb.vcm_type ? 1 : 0) + (config->ssdb.rom_type ? 1 : 0);
+ int next_local1 = 1;
+ /* Method (_DSM, 4, NotSerialized) */
+ acpigen_write_method("_DSM", 4);
+
+ /* ToBuffer (Arg0, Local0) */
+ acpigen_write_to_buffer(ARG0_OP, LOCAL0_OP);
+
+ /* If (LEqual (Local0, ToUUID(uuid))) */
+ acpigen_write_if();
+ acpigen_emit_byte(LEQUAL_OP);
+ acpigen_emit_byte(LOCAL0_OP);
+ acpigen_write_uuid(SENSOR_NAME_UUID);
+ acpigen_write_return_string(config->sensor_name ? config->sensor_name : "UNKNOWN");
+ acpigen_pop_len(); /* If */
+
+ /* If (LEqual (Local0, ToUUID(uuid))) */
+ acpigen_write_if();
+ acpigen_emit_byte(LEQUAL_OP);
+ acpigen_emit_byte(LOCAL0_OP);
+ acpigen_write_uuid(SENSOR_TYPE_UUID);
+ /* ToInteger (Arg2, Local1) */
+ acpigen_write_to_integer(ARG2_OP, LOCAL1_OP);
+
+ /* If (LEqual (Local1, 1)) */
+ acpigen_write_if_lequal_op_int(LOCAL1_OP, next_local1++);
+ acpigen_write_return_integer(local1_ret);
+ acpigen_pop_len(); /* If Arg2=1 */
+
+ /* If (LEqual (Local1, 2)) */
+ acpigen_write_if_lequal_op_int(LOCAL1_OP, next_local1++);
+ acpigen_write_return_integer(address_for_dev_type(dev, DEV_TYPE_SENSOR));
+ acpigen_pop_len(); /* If Arg2=2 */
+
+ if (config->ssdb.vcm_type) {
+ /* If (LEqual (Local1, 3)) */
+ acpigen_write_if_lequal_op_int(LOCAL1_OP, next_local1++);
+ acpigen_write_return_integer(address_for_dev_type(dev, DEV_TYPE_VCM));
+ acpigen_pop_len(); /* If Arg2=3 */
+ }
+
+ if (config->ssdb.rom_type) {
+ /* If (LEqual (Local1, 3 or 4)) */
+ acpigen_write_if_lequal_op_int(LOCAL1_OP, next_local1);
+ acpigen_write_return_integer(address_for_dev_type(dev, DEV_TYPE_ROM));
+ acpigen_pop_len(); /* If Arg2=3 or 4 */
+ }
+
+ acpigen_pop_len(); /* If uuid */
+
+ /* Return (Buffer (One) { 0x0 }) */
+ acpigen_write_return_singleton_buffer(0x0);
+
+ acpigen_pop_len(); /* Method _DSM */
+}
+
static void camera_fill_sensor_defaults(struct drivers_intel_mipi_camera_config *config)
{
if (config->disable_ssdb_defaults)
@@ -66,6 +148,9 @@
camera_fill_sensor_defaults(config);
+ /* _DSM */
+ camera_generate_dsm(dev);
+
ep00 = acpi_dp_new_table("EP00");
acpi_dp_add_integer(ep00, "endpoint", DEFAULT_ENDPOINT);
acpi_dp_add_integer(ep00, "clock-lanes", 0);