drm/amd/display: Add Logging for Gamma Related information (2/2)

[Why]
A recent bug showed that logging would be useful in debugging
various gamma issues.

[How]
Add logging in dc.
Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c

@@ -343,8 +343,8 @@ bool cm_helper_translate_curve_to_hw_format(
 		region_start = -MAX_LOW_POINT;
 		region_end   = NUMBER_REGIONS - MAX_LOW_POINT;
 	} else {
-		/* 10 segments
-		 * segment is from 2^-10 to 2^0
+		/* 11 segments
+		 * segment is from 2^-10 to 2^1
 		 * There are less than 256 points, for optimization
 		 */
 		seg_distr[0] = 3;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -1435,6 +1435,34 @@ static bool dcn10_set_input_transfer_func(struct pipe_ctx *pipe_ctx,
 	return result;
 }
 
+#define MAX_NUM_HW_POINTS 0x200
+
+static void log_tf(struct dc_context *ctx,
+				struct dc_transfer_func *tf, uint32_t hw_points_num)
+{
+	// DC_LOG_GAMMA is default logging of all hw points
+	// DC_LOG_ALL_GAMMA logs all points, not only hw points
+	// DC_LOG_ALL_TF_POINTS logs all channels of the tf
+	int i = 0;
+
+	DC_LOGGER_INIT(ctx->logger);
+	DC_LOG_GAMMA("Gamma Correction TF");
+	DC_LOG_ALL_GAMMA("Logging all tf points...");
+	DC_LOG_ALL_TF_CHANNELS("Logging all channels...");
+
+	for (i = 0; i < hw_points_num; i++) {
+		DC_LOG_GAMMA("R %d %llu\n", i, tf->tf_pts.red[i].value);
+		DC_LOG_ALL_TF_CHANNELS("G %d, %llu\n", i, tf->tf_pts.green[i].value);
+		DC_LOG_ALL_TF_CHANNELS("B %d, %llu\n", i, tf->tf_pts.blue[i].value);
+	}
+
+	for (i = hw_points_num; i < MAX_NUM_HW_POINTS; i++) {
+		DC_LOG_ALL_GAMMA("R %d %llu\n", i, tf->tf_pts.red[i].value);
+		DC_LOG_ALL_TF_CHANNELS("G %d %llu\n", i, tf->tf_pts.green[i].value);
+		DC_LOG_ALL_TF_CHANNELS("B %d %llu\n", i, tf->tf_pts.blue[i].value);
+	}
+}
+
 static bool
 dcn10_set_output_transfer_func(struct pipe_ctx *pipe_ctx,
 			       const struct dc_stream_state *stream)
@@ -1463,6 +1491,10 @@ dcn10_set_output_transfer_func(struct pipe_ctx *pipe_ctx,
 	} else
 		dpp->funcs->dpp_program_regamma_pwl(dpp, NULL, OPP_REGAMMA_BYPASS);
 
+	log_tf(stream->ctx,
+			stream->out_transfer_func,
+			dpp->regamma_params.hw_points_num);
+
 	return true;
 }
 

drivers/gpu/drm/amd/display/include/logger_types.h

@@ -63,6 +63,9 @@
 #define DC_LOG_IF_TRACE(...) pr_debug("[IF_TRACE]:"__VA_ARGS__)
 #define DC_LOG_PERF_TRACE(...) DRM_DEBUG_KMS(__VA_ARGS__)
 #define DC_LOG_RETIMER_REDRIVER(...) DRM_DEBUG_KMS(__VA_ARGS__)
+#define DC_LOG_GAMMA(...) pr_debug("[GAMMA]:"__VA_ARGS__)
+#define DC_LOG_ALL_GAMMA(...) pr_debug("[GAMMA]:"__VA_ARGS__)
+#define DC_LOG_ALL_TF_CHANNELS(...) pr_debug("[GAMMA]:"__VA_ARGS__)
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
 #define DC_LOG_DSC(...) DRM_DEBUG_KMS(__VA_ARGS__)
 #endif
@@ -118,6 +121,9 @@ enum dc_log_type {
 #endif
 	LOG_DWB,
 	LOG_GAMMA_DEBUG,
+	LOG_MAX_HW_POINTS,
+	LOG_ALL_TF_CHANNELS,
+	LOG_SAMPLE_1DLUT,
 	LOG_SECTION_TOTAL_COUNT
 };