drm/amd/display: set av_mute in hw_init for HDMI

[Description]
OS will reserve HW state in UEFI mode.
Driver init_hw reset to RGB which caused HDMI green in YCbCr mode.
read HW blank_color based on acc_mode.
Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.c

@@ -89,6 +89,7 @@ static const struct link_encoder_funcs dcn10_lnk_enc_funcs = {
 	.disable_hpd = dcn10_link_encoder_disable_hpd,
 	.is_dig_enabled = dcn10_is_dig_enabled,
 	.get_dig_frontend = dcn10_get_dig_frontend,
+	.get_dig_mode = dcn10_get_dig_mode,
 	.destroy = dcn10_link_encoder_destroy
 };
 
@@ -1397,3 +1398,25 @@ void dcn10_aux_initialize(struct dcn10_link_encoder *enc10)
 	AUX_REG_UPDATE(AUX_DPHY_RX_CONTROL0,
 			AUX_RX_RECEIVE_WINDOW, 0);
 }
+
+enum signal_type dcn10_get_dig_mode(
+	struct link_encoder *enc)
+{
+	struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);
+	uint32_t value;
+	REG_GET(DIG_BE_CNTL, DIG_MODE, &value);
+	switch (value) {
+	case 1:
+		return SIGNAL_TYPE_DISPLAY_PORT;
+	case 2:
+		return SIGNAL_TYPE_DVI_SINGLE_LINK;
+	case 3:
+		return SIGNAL_TYPE_HDMI_TYPE_A;
+	case 5:
+		return SIGNAL_TYPE_DISPLAY_PORT_MST;
+	default:
+		return SIGNAL_TYPE_NONE;
+	}
+	return SIGNAL_TYPE_NONE;
+}
+

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h

@@ -515,4 +515,6 @@ unsigned int dcn10_get_dig_frontend(struct link_encoder *enc);
 
 void dcn10_aux_initialize(struct dcn10_link_encoder *enc10);
 
+enum signal_type dcn10_get_dig_mode(
+	struct link_encoder *enc);
 #endif /* __DC_LINK_ENCODER__DCN10_H__ */

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c

@@ -341,6 +341,7 @@ static const struct link_encoder_funcs dcn20_link_enc_funcs = {
 	.fec_set_enable = enc2_fec_set_enable,
 	.fec_set_ready = enc2_fec_set_ready,
 	.fec_is_active = enc2_fec_is_active,
+	.get_dig_mode = dcn10_get_dig_mode,
 	.get_dig_frontend = dcn10_get_dig_frontend,
 };
 

drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h

@@ -184,6 +184,8 @@ struct link_encoder_funcs {
 	bool (*fec_is_active)(struct link_encoder *enc);
 #endif
 	bool (*is_in_alt_mode) (struct link_encoder *enc);
+	enum signal_type (*get_dig_mode)(
+		struct link_encoder *enc);
 };
 
 #endif /* LINK_ENCODER_H_ */