drm/amd/display: Load DMCU IRAM

DMCU IRAM must be loaded by the driver before DMCU
can function.

Move the IRAM code out of the shadows and into a new file
modules/power/power_helpers.c

The IRAM table contains the backlight curve and ABM parameters

Add this new file to the Makefiles

Call dmcu_load_iram in late init of DM

Move struct dmcu_version from dc.h to dmcu.h to allow
dmcu to be included on its own
Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/Makefile

@@ -32,11 +32,12 @@ subdir-ccflags-y += -I$(FULL_AMD_DISPLAY_PATH)/modules/inc
 subdir-ccflags-y += -I$(FULL_AMD_DISPLAY_PATH)/modules/freesync
 subdir-ccflags-y += -I$(FULL_AMD_DISPLAY_PATH)/modules/color
 subdir-ccflags-y += -I$(FULL_AMD_DISPLAY_PATH)/modules/info_packet
+subdir-ccflags-y += -I$(FULL_AMD_DISPLAY_PATH)/modules/power
 
 #TODO: remove when Timing Sync feature is complete
 subdir-ccflags-y += -DBUILD_FEATURE_TIMING_SYNC=0
 
-DAL_LIBS = amdgpu_dm dc	modules/freesync modules/color modules/info_packet
+DAL_LIBS = amdgpu_dm dc	modules/freesync modules/color modules/info_packet modules/power
 
 AMD_DAL = $(addsuffix /Makefile, $(addprefix $(FULL_AMD_DISPLAY_PATH)/,$(DAL_LIBS)))
 

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -71,6 +71,7 @@
 #endif
 
 #include "modules/inc/mod_freesync.h"
+#include "modules/power/power_helpers.h"
 
 #define FIRMWARE_RAVEN_DMCU		"amdgpu/raven_dmcu.bin"
 MODULE_FIRMWARE(FIRMWARE_RAVEN_DMCU);
@@ -642,6 +643,26 @@ static int dm_late_init(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+	struct dmcu_iram_parameters params;
+	unsigned int linear_lut[16];
+	int i;
+	struct dmcu *dmcu = adev->dm.dc->res_pool->dmcu;
+	bool ret;
+
+	for (i = 0; i < 16; i++)
+		linear_lut[i] = 0xFFFF * i / 15;
+
+	params.set = 0;
+	params.backlight_ramping_start = 0xCCCC;
+	params.backlight_ramping_reduction = 0xCCCCCCCC;
+	params.backlight_lut_array_size = 16;
+	params.backlight_lut_array = linear_lut;
+
+	ret = dmcu_load_iram(dmcu, params);
+
+	if (!ret)
+		return -EINVAL;
+
 	return detect_mst_link_for_all_connectors(adev->ddev);
 }
 

drivers/gpu/drm/amd/display/dc/dc.h

@@ -36,6 +36,7 @@
 
 #include "inc/hw_sequencer.h"
 #include "inc/compressor.h"
+#include "inc/hw/dmcu.h"
 #include "dml/display_mode_lib.h"
 
 #define DC_VER "3.2.06"
@@ -47,13 +48,6 @@
 /*******************************************************************************
  * Display Core Interfaces
  ******************************************************************************/
-struct dmcu_version {
-	unsigned int date;
-	unsigned int month;
-	unsigned int year;
-	unsigned int interface_version;
-};
-
 struct dc_versions {
 	const char *dc_ver;
 	struct dmcu_version dmcu_version;

drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h

@@ -32,6 +32,13 @@ enum dmcu_state {
 	DMCU_RUNNING = 1
 };
 
+struct dmcu_version {
+	unsigned int date;
+	unsigned int month;
+	unsigned int year;
+	unsigned int interface_version;
+};
+
 struct dmcu {
 	struct dc_context *ctx;
 	const struct dmcu_funcs *funcs;

drivers/gpu/drm/amd/display/modules/power/Makefile

+#
+# Copyright 2017 Advanced Micro Devices, Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+#
+#
+# Makefile for the 'power' sub-module of DAL.
+#
+
+MOD_POWER = power_helpers.o
+
+AMD_DAL_MOD_POWER = $(addprefix $(AMDDALPATH)/modules/power/,$(MOD_POWER))
+#$(info ************  DAL POWER MODULE MAKEFILE ************)
+
+AMD_DISPLAY_FILES += $(AMD_DAL_MOD_POWER)
\ No newline at end of file

drivers/gpu/drm/amd/display/modules/power/power_helpers.h

+/* Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef MODULES_POWER_POWER_HELPERS_H_
+#define MODULES_POWER_POWER_HELPERS_H_
+
+#include "dc/inc/hw/dmcu.h"
+
+
+enum abm_defines {
+	abm_defines_max_level = 4,
+	abm_defines_max_config = 4,
+};
+
+struct dmcu_iram_parameters {
+	unsigned int *backlight_lut_array;
+	unsigned int backlight_lut_array_size;
+	unsigned int backlight_ramping_reduction;
+	unsigned int backlight_ramping_start;
+	unsigned int set;
+};
+
+bool dmcu_load_iram(struct dmcu *dmcu,
+		struct dmcu_iram_parameters params);
+
+#endif /* MODULES_POWER_POWER_HELPERS_H_ */