drm/amd/display: Add Logging for Gamma Related information (1/2)

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

[How]
Add new log types and logging code to the color module.
Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -155,4 +155,6 @@ void context_clock_trace(
 
 #define DISPLAY_STATS_END(entry) (void)(entry)
 
+#define LOG_GAMMA_WRITE(msg, ...)
+
 #endif /* __DAL_LOGGER_INTERFACE_H__ */

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

@@ -117,6 +117,7 @@ enum dc_log_type {
 	LOG_DSC,
 #endif
 	LOG_DWB,
+	LOG_GAMMA_DEBUG,
 	LOG_SECTION_TOTAL_COUNT
 };
 

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

@@ -97,6 +97,18 @@ void setup_x_points_distribution(void)
 	}
 }
 
+void log_x_points_distribution(struct dal_logger *logger)
+{
+	int i = 0;
+
+	if (logger != NULL) {
+		LOG_GAMMA_WRITE("]Log X Distribution\n");
+
+		for (i = 0; i < MAX_HW_POINTS; i++)
+			LOG_GAMMA_WRITE("]%llu\n", coordinates_x[i].x.value);
+	}
+}
+
 static void compute_pq(struct fixed31_32 in_x, struct fixed31_32 *out_y)
 {
 	/* consts for PQ gamma formula. */

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

@@ -92,6 +92,7 @@ struct translate_from_linear_space_args {
 };
 
 void setup_x_points_distribution(void);
+void log_x_points_distribution(struct dal_logger *logger);
 void precompute_pq(void);
 void precompute_de_pq(void);