[S] Change in coreboot[main]: soc/intel/mtl: Hook up GMA ACPI brightness controls

[Tim Crawford (Code Review)]

Tim Crawford has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/82729?usp=email )

Change subject: soc/intel/mtl: Hook up GMA ACPI brightness controls
......................................................................

soc/intel/mtl: Hook up GMA ACPI brightness controls

Add function needed to generate ACPI backlight control SSDT, along with
Kconfig values for accessing the registers.

Change-Id: Ied08e5e9fe4913bd60474ed7dcf88b945172558d
Signed-off-by: Jeremy Soller 
Signed-off-by: Tim Crawford 
---
M src/soc/intel/meteorlake/Kconfig
M src/soc/intel/meteorlake/Makefile.mk
M src/soc/intel/meteorlake/chip.h
A src/soc/intel/meteorlake/graphics.c
4 files changed, 28 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/29/82729/1

diff --git a/src/soc/intel/meteorlake/Kconfig b/src/soc/intel/meteorlake/Kconfig
index 622d35f..31aee89 100644
--- a/src/soc/intel/meteorlake/Kconfig
+++ b/src/soc/intel/meteorlake/Kconfig
@@ -402,6 +402,18 @@
    help
      Set this option if debug build of FSP is used.

+config INTEL_GMA_BCLV_OFFSET
+	default 0xc8258
+
+config INTEL_GMA_BCLV_WIDTH
+	default 32
+
+config INTEL_GMA_BCLM_OFFSET
+	default 0xc8254
+
+config INTEL_GMA_BCLM_WIDTH
+	default 32
+
 config DROP_CPU_FEATURE_PROGRAM_IN_FSP
    bool
    default y if MP_SERVICES_PPI_V2_NOOP || CHROMEOS
diff --git a/src/soc/intel/meteorlake/Makefile.mk b/src/soc/intel/meteorlake/Makefile.mk
index 893523c..113bba4 100644
--- a/src/soc/intel/meteorlake/Makefile.mk
+++ b/src/soc/intel/meteorlake/Makefile.mk
@@ -37,6 +37,7 @@
 ramstage-y += espi.c
 ramstage-y += finalize.c
 ramstage-y += fsp_params.c
+ramstage-y += graphics.c
 ramstage-y += lockdown.c
 ramstage-y += p2sb.c
 ramstage-y += pcie_rp.c
diff --git a/src/soc/intel/meteorlake/chip.h b/src/soc/intel/meteorlake/chip.h
index 0c76b7c..0cee962 100644
--- a/src/soc/intel/meteorlake/chip.h
+++ b/src/soc/intel/meteorlake/chip.h
@@ -4,6 +4,7 @@
 #define _SOC_CHIP_H_

#include <drivers/i2c/designware/dw_i2c.h>
+#include <drivers/intel/gma/gma.h>
 #include <device/pci_ids.h>
 #include <gpio.h>
 #include <intelblocks/cfg.h>
@@ -527,6 +528,9 @@
     * as per `enum slew_rate` data type.
     */
    uint8_t slow_slew_rate_config[NUM_VR_DOMAINS];
+
+	/* i915 struct for GMA backlight control */
+	struct i915_gpu_controller_info gfx;
 };

typedef struct soc_intel_meteorlake_config config_t;
diff --git a/src/soc/intel/meteorlake/graphics.c b/src/soc/intel/meteorlake/graphics.c
new file mode 100644
index 0000000..0ce4442
--- /dev/null
+++ b/src/soc/intel/meteorlake/graphics.c
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <intelblocks/graphics.h>
+#include <soc/ramstage.h>
+
+const struct i915_gpu_controller_info *
+intel_igd_get_controller_info(const struct device *const dev)
+{
+	const struct soc_intel_meteorlake_config *const chip = dev->chip_info;
+	return &chip->gfx;
+}