drm/amd/display: Internal refactoring to abstract color caps

[Why&How]
modules/color calculates various colour operations which are translated
to abstracted HW. DCE 5-12 had almost no important changes, but
starting with DCN1, every new generation comes with fairly major
differences in color pipeline.
We would hack it with some DCN checks, but a better approach is to
abstract color pipe capabilities so modules/DM can decide mapping to
HW block based on logical capabilities,
Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -239,7 +239,8 @@ static int __set_output_tf(struct dc_transfer_func *func,
 		 * instead to simulate this.
 		 */
 		gamma->type = GAMMA_CUSTOM;
-		res = mod_color_calculate_degamma_params(func, gamma, true);
+		res = mod_color_calculate_degamma_params(NULL, func,
+							gamma, true);
 	} else {
 		/*
 		 * Assume sRGB. The actual mapping will depend on whether the
@@ -271,7 +272,7 @@ static int __set_input_tf(struct dc_transfer_func *func,
 
 	__drm_lut_to_dc_gamma(lut, gamma, false);
 
-	res = mod_color_calculate_degamma_params(func, gamma, true);
+	res = mod_color_calculate_degamma_params(NULL, func, gamma, true);
 	dc_gamma_release(&gamma);
 
 	return res ? 0 : -ENOMEM;
@@ -485,7 +486,7 @@ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc,
 		dc_plane_state->in_transfer_func->tf = tf;
 
 		if (tf != TRANSFER_FUNCTION_SRGB &&
-		    !mod_color_calculate_degamma_params(
+		    !mod_color_calculate_degamma_params(NULL,
 			    dc_plane_state->in_transfer_func, NULL, false))
 			return -ENOMEM;
 	} else {

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

@@ -98,6 +98,49 @@ struct dc_plane_cap {
 	} max_downscale_factor;
 };
 
+// Color management caps (DPP and MPC)
+struct rom_curve_caps {
+	uint16_t srgb : 1;
+	uint16_t bt2020 : 1;
+	uint16_t gamma2_2 : 1;
+	uint16_t pq : 1;
+	uint16_t hlg : 1;
+};
+
+struct dpp_color_caps {
+	uint16_t dcn_arch : 1; // all DCE generations treated the same
+	// input lut is different than most LUTs, just plain 256-entry lookup
+	uint16_t input_lut_shared : 1; // shared with DGAM
+	uint16_t icsc : 1;
+	uint16_t dgam_ram : 1;
+	uint16_t post_csc : 1; // before gamut remap
+	uint16_t gamma_corr : 1;
+
+	// hdr_mult and gamut remap always available in DPP (in that order)
+	// 3d lut implies shaper LUT,
+	// it may be shared with MPC - check MPC:shared_3d_lut flag
+	uint16_t hw_3d_lut : 1;
+	uint16_t ogam_ram : 1; // blnd gam
+	uint16_t ocsc : 1;
+	struct rom_curve_caps dgam_rom_caps;
+	struct rom_curve_caps ogam_rom_caps;
+};
+
+struct mpc_color_caps {
+	uint16_t gamut_remap : 1;
+	uint16_t ogam_ram : 1;
+	uint16_t ocsc : 1;
+	uint16_t num_3dluts : 3; //3d lut always assumes a preceding shaper LUT
+	uint16_t shared_3d_lut:1; //can be in either DPP or MPC, but single instance
+
+	struct rom_curve_caps ogam_rom_caps;
+};
+
+struct dc_color_caps {
+	struct dpp_color_caps dpp;
+	struct mpc_color_caps mpc;
+};
+
 struct dc_caps {
 	uint32_t max_streams;
 	uint32_t max_links;
@@ -120,9 +163,9 @@ struct dc_caps {
 	bool psp_setup_panel_mode;
 	bool extended_aux_timeout_support;
 	bool dmcub_support;
-	bool hw_3d_lut;
 	enum dp_protocol_version max_dp_protocol_version;
 	struct dc_plane_cap planes[MAX_PLANES];
+	struct dc_color_caps color;
 };
 
 struct dc_bug_wa {

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c

@@ -1384,6 +1384,40 @@ static bool dcn10_resource_construct(
 	/* Raven DP PHY HBR2 eye diagram pattern is not stable. Use TP4 */
 	dc->caps.force_dp_tps4_for_cp2520 = true;
 
+	/* Color pipeline capabilities */
+	dc->caps.color.dpp.dcn_arch = 1;
+	dc->caps.color.dpp.input_lut_shared = 1;
+	dc->caps.color.dpp.icsc = 1;
+	dc->caps.color.dpp.dgam_ram = 1;
+	dc->caps.color.dpp.dgam_rom_caps.srgb = 1;
+	dc->caps.color.dpp.dgam_rom_caps.bt2020 = 1;
+	dc->caps.color.dpp.dgam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.dpp.dgam_rom_caps.pq = 0;
+	dc->caps.color.dpp.dgam_rom_caps.hlg = 0;
+	dc->caps.color.dpp.post_csc = 0;
+	dc->caps.color.dpp.gamma_corr = 0;
+
+	dc->caps.color.dpp.hw_3d_lut = 0;
+	dc->caps.color.dpp.ogam_ram = 1; // RGAM on DCN1
+	dc->caps.color.dpp.ogam_rom_caps.srgb = 1;
+	dc->caps.color.dpp.ogam_rom_caps.bt2020 = 1;
+	dc->caps.color.dpp.ogam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.dpp.ogam_rom_caps.pq = 0;
+	dc->caps.color.dpp.ogam_rom_caps.hlg = 0;
+	dc->caps.color.dpp.ocsc = 1;
+
+	/* no post-blend color operations */
+	dc->caps.color.mpc.gamut_remap = 0;
+	dc->caps.color.mpc.num_3dluts = 0;
+	dc->caps.color.mpc.shared_3d_lut = 0;
+	dc->caps.color.mpc.ogam_ram = 0;
+	dc->caps.color.mpc.ogam_rom_caps.srgb = 0;
+	dc->caps.color.mpc.ogam_rom_caps.bt2020 = 0;
+	dc->caps.color.mpc.ogam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.mpc.ogam_rom_caps.pq = 0;
+	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
+	dc->caps.color.mpc.ocsc = 0;
+
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
 		dc->debug = debug_defaults_drv;
 	else

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -3709,9 +3709,42 @@ static bool dcn20_resource_construct(
 	dc->caps.max_slave_planes = 1;
 	dc->caps.post_blend_color_processing = true;
 	dc->caps.force_dp_tps4_for_cp2520 = true;
-	dc->caps.hw_3d_lut = true;
 	dc->caps.extended_aux_timeout_support = true;
 
+	/* Color pipeline capabilities */
+	dc->caps.color.dpp.dcn_arch = 1;
+	dc->caps.color.dpp.input_lut_shared = 0;
+	dc->caps.color.dpp.icsc = 1;
+	dc->caps.color.dpp.dgam_ram = 1;
+	dc->caps.color.dpp.dgam_rom_caps.srgb = 1;
+	dc->caps.color.dpp.dgam_rom_caps.bt2020 = 1;
+	dc->caps.color.dpp.dgam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.dpp.dgam_rom_caps.pq = 0;
+	dc->caps.color.dpp.dgam_rom_caps.hlg = 0;
+	dc->caps.color.dpp.post_csc = 0;
+	dc->caps.color.dpp.gamma_corr = 0;
+
+	dc->caps.color.dpp.hw_3d_lut = 1;
+	dc->caps.color.dpp.ogam_ram = 1;
+	// no OGAM ROM on DCN2, only MPC ROM
+	dc->caps.color.dpp.ogam_rom_caps.srgb = 0;
+	dc->caps.color.dpp.ogam_rom_caps.bt2020 = 0;
+	dc->caps.color.dpp.ogam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.dpp.ogam_rom_caps.pq = 0;
+	dc->caps.color.dpp.ogam_rom_caps.hlg = 0;
+	dc->caps.color.dpp.ocsc = 0;
+
+	dc->caps.color.mpc.gamut_remap = 0;
+	dc->caps.color.mpc.num_3dluts = 0;
+	dc->caps.color.mpc.shared_3d_lut = 0;
+	dc->caps.color.mpc.ogam_ram = 1;
+	dc->caps.color.mpc.ogam_rom_caps.srgb = 0;
+	dc->caps.color.mpc.ogam_rom_caps.bt2020 = 0;
+	dc->caps.color.mpc.ogam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.mpc.ogam_rom_caps.pq = 0;
+	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
+	dc->caps.color.mpc.ocsc = 1;
+
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV) {
 		dc->debug = debug_defaults_drv;
 	} else if (dc->ctx->dce_environment == DCE_ENV_FPGA_MAXIMUS) {

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c

@@ -1798,7 +1798,6 @@ static bool dcn21_resource_construct(
 	dc->caps.i2c_speed_in_khz = 100;
 	dc->caps.max_cursor_size = 256;
 	dc->caps.dmdata_alloc_size = 2048;
-	dc->caps.hw_3d_lut = true;
 
 	dc->caps.max_slave_planes = 1;
 	dc->caps.post_blend_color_processing = true;
@@ -1807,6 +1806,40 @@ static bool dcn21_resource_construct(
 	dc->caps.dmcub_support = true;
 	dc->caps.is_apu = true;
 
+	/* Color pipeline capabilities */
+	dc->caps.color.dpp.dcn_arch = 1;
+	dc->caps.color.dpp.input_lut_shared = 0;
+	dc->caps.color.dpp.icsc = 1;
+	dc->caps.color.dpp.dgam_ram = 1;
+	dc->caps.color.dpp.dgam_rom_caps.srgb = 1;
+	dc->caps.color.dpp.dgam_rom_caps.bt2020 = 1;
+	dc->caps.color.dpp.dgam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.dpp.dgam_rom_caps.pq = 0;
+	dc->caps.color.dpp.dgam_rom_caps.hlg = 0;
+	dc->caps.color.dpp.post_csc = 0;
+	dc->caps.color.dpp.gamma_corr = 0;
+
+	dc->caps.color.dpp.hw_3d_lut = 1;
+	dc->caps.color.dpp.ogam_ram = 1;
+	// no OGAM ROM on DCN2
+	dc->caps.color.dpp.ogam_rom_caps.srgb = 0;
+	dc->caps.color.dpp.ogam_rom_caps.bt2020 = 0;
+	dc->caps.color.dpp.ogam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.dpp.ogam_rom_caps.pq = 0;
+	dc->caps.color.dpp.ogam_rom_caps.hlg = 0;
+	dc->caps.color.dpp.ocsc = 0;
+
+	dc->caps.color.mpc.gamut_remap = 0;
+	dc->caps.color.mpc.num_3dluts = 0;
+	dc->caps.color.mpc.shared_3d_lut = 0;
+	dc->caps.color.mpc.ogam_ram = 1;
+	dc->caps.color.mpc.ogam_rom_caps.srgb = 0;
+	dc->caps.color.mpc.ogam_rom_caps.bt2020 = 0;
+	dc->caps.color.mpc.ogam_rom_caps.gamma2_2 = 0;
+	dc->caps.color.mpc.ogam_rom_caps.pq = 0;
+	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
+	dc->caps.color.mpc.ocsc = 1;
+
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
 		dc->debug = debug_defaults_drv;
 	else if (dc->ctx->dce_environment == DCE_ENV_FPGA_MAXIMUS) {

drivers/gpu/drm/amd/display/modules/color/color_gamma.c

@@ -1782,7 +1782,8 @@ bool calculate_user_regamma_ramp(struct dc_transfer_func *output_tf,
 	return ret;
 }
 
-bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf,
+bool mod_color_calculate_degamma_params(struct dc_color_caps *dc_caps,
+		struct dc_transfer_func *input_tf,
 		const struct dc_gamma *ramp, bool mapUserRamp)
 {
 	struct dc_transfer_func_distributed_points *tf_pts = &input_tf->tf_pts;
@@ -1801,12 +1802,30 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf,
 	/* we can use hardcoded curve for plain SRGB TF
 	 * If linear, it's bypass if on user ramp
 	 */
-	if (input_tf->type == TF_TYPE_PREDEFINED &&
-			(input_tf->tf == TRANSFER_FUNCTION_SRGB ||
+	if (input_tf->type == TF_TYPE_PREDEFINED) {
+		if ((input_tf->tf == TRANSFER_FUNCTION_SRGB ||
 				input_tf->tf == TRANSFER_FUNCTION_LINEAR) &&
 				!mapUserRamp)
 			return true;
 
+		if (dc_caps != NULL &&
+			dc_caps->dpp.dcn_arch == 1) {
+
+			if (input_tf->tf == TRANSFER_FUNCTION_PQ &&
+					dc_caps->dpp.dgam_rom_caps.pq == 1)
+				return true;
+
+			if (input_tf->tf == TRANSFER_FUNCTION_GAMMA22 &&
+					dc_caps->dpp.dgam_rom_caps.gamma2_2 == 1)
+				return true;
+
+			// HLG OOTF not accounted for
+			if (input_tf->tf == TRANSFER_FUNCTION_HLG &&
+					dc_caps->dpp.dgam_rom_caps.hlg == 1)
+				return true;
+		}
+	}
+
 	input_tf->type = TF_TYPE_DISTRIBUTED_POINTS;
 
 	if (mapUserRamp && ramp && ramp->type == GAMMA_RGB_256) {

drivers/gpu/drm/amd/display/modules/color/color_gamma.h

@@ -30,6 +30,7 @@ struct dc_transfer_func;
 struct dc_gamma;
 struct dc_transfer_func_distributed_points;
 struct dc_rgb_fixed;
+struct dc_color_caps;
 enum dc_transfer_func_predefined;
 
 /* For SetRegamma ADL interface support
@@ -100,7 +101,8 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
 		const struct dc_gamma *ramp, bool mapUserRamp, bool canRomBeUsed,
 		const struct freesync_hdr_tf_params *fs_params);
 
-bool mod_color_calculate_degamma_params(struct dc_transfer_func *output_tf,
+bool mod_color_calculate_degamma_params(struct dc_color_caps *dc_caps,
+		struct dc_transfer_func *output_tf,
 		const struct dc_gamma *ramp, bool mapUserRamp);
 
 bool mod_color_calculate_degamma_curve(enum dc_transfer_func_predefined trans,