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drv/intel/mipi_camera: Add CVF Support DSM function

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Add support for Computer Vision Framework Support DSM UUID with ACPI-
compliant query handling and ASL documentation. Currently we are
always returning Zero (unsupported/disabled), but support will be
added in future patches.

This UUID is utilized by the standard Intel drivers under both Windows
and mainline Linux.

TEST=tested with rest of patch train on screebo, redrix, and others.

Change-Id: I6db88285d757826fa0f3eb5aa4bb1cc4176b95b3
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90490
Reviewed-by: Alicja Michalska <ahplka19@gmail.com>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Matt DeVillier 2025-12-11 21:33:08 -06:00
commit 1532eb60ee
1 changed files with 35 additions and 0 deletions
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35
src/drivers/intel/mipi_camera/camera.c
View file

@ -20,6 +20,7 @@
#define UUID_DSM_SENSOR "822ace8f-2814-4174-a56b-5f029fe079ee"
#define UUID_DSM_I2C "26257549-9271-4ca4-bb43-c4899d5a4881"
#define UUID_DSM_I2C_V2 "5815c5c8-c47d-477b-9a8d-76173176414b"
#define UUID_DSM_CVF "02f55f0c-2e63-4f05-84f3-bf1980f9af79"
#define DEFAULT_ENDPOINT 0
#define DEFAULT_REMOTE_NAME "\\_SB.PCI0.CIO2"
#define CIO2_PCI_DEV 0x14
@ -409,6 +410,39 @@ static void camera_generate_dsm_i2c_v2(const struct device *dev)
acpigen_pop_len(); /* If uuid */
}
/*
* Generate ASL DSM code for Computer Vision Framework (CVF)
*
* Generated ASL:
* If (LEqual (Local0, ToUUID ("02f55f0c-2e63-4f05-84f3-bf1980f9af79"))) {
* If (LEqual (Arg2, Zero)) {
* Return (Buffer (One) { 0x3 })
* }
* If (LEqual (Arg2, One)) {
* Return (Zero)
* }
* }
*/
static void camera_generate_dsm_cvf(const struct device *dev)
{
/* If (LEqual (Local0, ToUUID (UUID_DSM_CVF))) */
acpigen_write_if();
acpigen_emit_byte(LEQUAL_OP);
acpigen_emit_byte(LOCAL0_OP);
acpigen_write_uuid(UUID_DSM_CVF);
/* If (LEqual (Arg2, Zero)) */
acpigen_write_if_lequal_op_int(ARG2_OP, 0);
acpigen_write_return_singleton_buffer(0x3);
acpigen_pop_len();
/* If (LEqual (Arg2, One)) */
acpigen_write_if_lequal_op_int(ARG2_OP, 1);
acpigen_write_return_integer(0);
acpigen_pop_len();
acpigen_pop_len(); /* If uuid */
}
static void camera_generate_dsm(const struct device *dev)
{
@ -421,6 +455,7 @@ static void camera_generate_dsm(const struct device *dev)
camera_generate_dsm_sensor(dev);
camera_generate_dsm_i2c(dev);
camera_generate_dsm_i2c_v2(dev);
camera_generate_dsm_cvf(dev);
/* Return (Buffer (One) { 0x0 }) */
acpigen_write_return_singleton_buffer(0x0);