Add i915_gpu_controller_info

Change-Id: I5f4e360974aefc75570ec20e500bb77bd962ca0a

src/mainboard/system76/galp5/devicetree.cb

@@ -174,7 +174,7 @@ chip soc/intel/tigerlake
 	register "tcc_offset" = "13"
 
 # Graphics (soc/intel/tigerlake/graphics.c)
-#TODO	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
+	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
 
 # PMC (soc/intel/tigerlake/pmc.c)
 	# TODO: Disable deep Sx states

src/soc/intel/tigerlake/Makefile.inc

@@ -36,6 +36,7 @@ ramstage-y += espi.c
 ramstage-y += finalize.c
 ramstage-y += fsp_params.c
 ramstage-y += gpio.c
+ramstage-y += graphics.c
 ramstage-y += lockdown.c
 ramstage-y += p2sb.c
 ramstage-y += pmc.c

src/soc/intel/tigerlake/chip.h

@@ -4,6 +4,7 @@
 #define _SOC_CHIP_H_
 
 #include <drivers/i2c/designware/dw_i2c.h>
+#include <drivers/intel/gma/gma.h>
 #include <intelblocks/cfg.h>
 #include <intelblocks/gpio.h>
 #include <intelblocks/gspi.h>
@@ -442,6 +443,10 @@ struct soc_intel_tigerlake_config {
 	 *  - PM_CFG.SLP_LAN_MIN_ASST_WDTH
 	 */
 	uint8_t PchPmPwrCycDur;
+
+
+	/* i915 struct for GMA backlight control */
+	struct i915_gpu_controller_info gfx;
 };
 
 typedef struct soc_intel_tigerlake_config config_t;

src/soc/intel/tigerlake/graphics.c

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <intelblocks/graphics.h>
+#include <soc/ramstage.h>
+
+const struct i915_gpu_controller_info *
+intel_igd_get_controller_info(const struct device *device)
+{
+	struct soc_intel_tigerlake_config *chip = device->chip_info;
+	return &chip->gfx;
+}