drm/amd/display: use rgb full range as default quantization for non HDMI

Refactor the quantization decision to color module.
Add the check if non HDMI, default quantization should be rgb full range.

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2184,7 +2184,8 @@ bool mod_color_set_saturation(struct mod_color *mod_color,
 	return true;
 }
 
-bool mod_color_set_preferred_quantization_range(struct mod_color *mod_color,
+bool mod_color_persist_user_preferred_quantization_range(
+		struct mod_color *mod_color,
 		const struct dc_sink *sink,
 		enum dc_quantization_range quantization_range)
 {
@@ -2214,13 +2215,90 @@ bool mod_color_set_preferred_quantization_range(struct mod_color *mod_color,
 
 bool mod_color_get_preferred_quantization_range(struct mod_color *mod_color,
 		const struct dc_sink *sink,
+		const struct dc_crtc_timing *timing,
 		enum dc_quantization_range *quantization_range)
 {
 	struct core_color *core_color = MOD_COLOR_TO_CORE(mod_color);
-	unsigned int sink_index;
+	unsigned int sink_index = sink_index_from_sink(core_color, sink);
+	enum dc_quantization_range user_preferred_quantization_range =
+			core_color->state[sink_index].
+				preferred_quantization_range;
+	bool rgb_full_range_supported =
+			mod_color_is_rgb_full_range_supported_for_timing(
+				sink, timing);
+	bool rgb_limited_range_supported =
+			mod_color_is_rgb_limited_range_supported_for_timing(
+				sink, timing);
+
+	if (rgb_full_range_supported && rgb_limited_range_supported)
+		*quantization_range = user_preferred_quantization_range;
+	else if (rgb_full_range_supported && !rgb_limited_range_supported)
+		*quantization_range = QUANTIZATION_RANGE_FULL;
+	else if (!rgb_full_range_supported && rgb_limited_range_supported)
+		*quantization_range = QUANTIZATION_RANGE_LIMITED;
+	else
+		*quantization_range = QUANTIZATION_RANGE_UNKNOWN;
 
-	sink_index = sink_index_from_sink(core_color, sink);
-	*quantization_range = core_color->state[sink_index].
-			preferred_quantization_range;
 	return true;
 }
+
+bool mod_color_is_rgb_full_range_supported_for_timing(
+		const struct dc_sink *sink,
+		const struct dc_crtc_timing *timing)
+{
+	bool result = false;
+
+	if (!sink || !timing)
+		return result;
+
+	if (sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A)
+		if (timing->vic || timing->hdmi_vic)
+			if (timing->h_addressable == 640 &&
+				timing->v_addressable == 480 &&
+				(timing->pix_clk_khz == 25200 ||
+					timing->pix_clk_khz == 25170 ||
+					timing->pix_clk_khz == 25175))
+				result = true;
+			else
+				/* don't support full range rgb */
+				/* for HDMI CEA861 timings except VGA mode */
+				result = false;
+		else
+			result = true;
+	else
+		result = true;
+
+	return result;
+}
+
+bool mod_color_is_rgb_limited_range_supported_for_timing(
+		const struct dc_sink *sink,
+		const struct dc_crtc_timing *timing)
+{
+	bool result = false;
+
+	if (!sink || !timing)
+		return result;
+
+	if (sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A)
+		if (timing->vic || timing->hdmi_vic)
+			if (timing->h_addressable == 640 &&
+				timing->v_addressable == 480 &&
+				(timing->pix_clk_khz == 25200 ||
+						timing->pix_clk_khz == 25170 ||
+						timing->pix_clk_khz == 25175))
+				/* don't support rgb limited for */
+				/* HDMI CEA VGA mode */
+				result = false;
+			else
+				/* support rgb limited for non VGA CEA timing */
+				result = true;
+		else
+			/* support rgb limited for non CEA HDMI timing */
+			result = true;
+	else
+		/* don't support rgb limited for non HDMI signal */
+		result = false;
+
+	return result;
+}

drivers/gpu/drm/amd/display/modules/inc/mod_color.h

@@ -168,12 +168,22 @@ bool mod_color_set_saturation(struct mod_color *mod_color,
 		const struct dc_stream **streams, int num_streams,
 		int saturation_value);
 
-bool mod_color_set_preferred_quantization_range(struct mod_color *mod_color,
+bool mod_color_persist_user_preferred_quantization_range(
+		struct mod_color *mod_color,
 		const struct dc_sink *sink,
 		enum dc_quantization_range quantization_range);
 
 bool mod_color_get_preferred_quantization_range(struct mod_color *mod_color,
 		const struct dc_sink *sink,
+		const struct dc_crtc_timing *timing,
 		enum dc_quantization_range *quantization_range);
 
+bool mod_color_is_rgb_full_range_supported_for_timing(
+		const struct dc_sink *sink,
+		const struct dc_crtc_timing *timing);
+
+bool mod_color_is_rgb_limited_range_supported_for_timing(
+		const struct dc_sink *sink,
+		const struct dc_crtc_timing *timing);
+
 #endif /* MOD_COLOR_H_ */