drm/amd/display: change global buffer to local buffer

[ Upstream commit 8ae5b15 ]

[Why]
Multi-adapter calculate regamma table at the same time.
Two thread used the same global variable cause race
condition.

[How]
Change global buffer to local buffer

Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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

@@ -195,10 +195,13 @@ static int __set_legacy_tf(struct dc_transfer_func *func,
 			   bool has_rom)
 {
 	struct dc_gamma *gamma = NULL;
+	struct calculate_buffer cal_buffer = {0};
 	bool res;
 
 	ASSERT(lut && lut_size == MAX_COLOR_LEGACY_LUT_ENTRIES);
 
+	cal_buffer.buffer_index = -1;
+
 	gamma = dc_create_gamma();
 	if (!gamma)
 		return -ENOMEM;
@@ -208,7 +211,7 @@ static int __set_legacy_tf(struct dc_transfer_func *func,
 	__drm_lut_to_dc_gamma(lut, gamma, true);
 
 	res = mod_color_calculate_regamma_params(func, gamma, true, has_rom,
-						 NULL);
+						 NULL, &cal_buffer);
 
 	dc_gamma_release(&gamma);
 
@@ -221,10 +224,13 @@ static int __set_output_tf(struct dc_transfer_func *func,
 			   bool has_rom)
 {
 	struct dc_gamma *gamma = NULL;
+	struct calculate_buffer cal_buffer = {0};
 	bool res;
 
 	ASSERT(lut && lut_size == MAX_COLOR_LUT_ENTRIES);
 
+	cal_buffer.buffer_index = -1;
+
 	gamma = dc_create_gamma();
 	if (!gamma)
 		return -ENOMEM;
@@ -248,7 +254,7 @@ static int __set_output_tf(struct dc_transfer_func *func,
 		 */
 		gamma->type = GAMMA_CS_TFM_1D;
 		res = mod_color_calculate_regamma_params(func, gamma, false,
-							 has_rom, NULL);
+							 has_rom, NULL, &cal_buffer);
 	}
 
 	dc_gamma_release(&gamma);

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

@@ -25,6 +25,10 @@
 
 MOD_COLOR = color_gamma.o
 
+ifdef CONFIG_DRM_AMD_DC_DCN
+MOD_COLOR += color_table.o
+endif
+
 AMD_DAL_MOD_COLOR = $(addprefix $(AMDDALPATH)/modules/color/,$(MOD_COLOR))
 #$(info ************  DAL COLOR MODULE MAKEFILE ************)