1 files changed, 63 insertions, 55 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 6132b645bfd1..8bd7f42a8053 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -541,6 +541,7 @@ static void link_disconnect_sink(struct dc_link *link)
 	}
 
 	link->dpcd_sink_count = 0;
+	//link->dpcd_caps.dpcd_rev.raw = 0;
 }
 
 static void link_disconnect_remap(struct dc_sink *prev_sink, struct dc_link *link)
@@ -742,6 +743,7 @@ static bool detect_dp(struct dc_link *link,
 								sink_caps,
 								audio_support);
 		link->dpcd_caps.dongle_type = sink_caps->dongle_type;
+		link->dpcd_caps.dpcd_rev.raw = 0;
 	}
 
 	return true;
@@ -1663,6 +1665,12 @@ struct dc_link *link_create(const struct link_init_data *init_params)
 	if (false == dc_link_construct(link, init_params))
 		goto construct_fail;
 
+	/*
+	 * Must use preferred_link_setting, not reported_link_cap or verified_link_cap,
+	 * since struct preferred_link_setting won't be reset after S3.
+	 */
+	link->preferred_link_setting.dpcd_source_device_specific_field_support = true;
+
 	return link;
 
 construct_fail:
@@ -3509,61 +3517,6 @@ void dc_link_enable_hpd_filter(struct dc_link *link, bool enable)
 	}
 }
 
-uint32_t dc_bandwidth_in_kbps_from_timing(
-	const struct dc_crtc_timing *timing)
-{
-	uint32_t bits_per_channel = 0;
-	uint32_t kbps;
-
-#if defined(CONFIG_DRM_AMD_DC_DCN)
-	if (timing->flags.DSC)
-		return dc_dsc_stream_bandwidth_in_kbps(timing,
-				timing->dsc_cfg.bits_per_pixel,
-				timing->dsc_cfg.num_slices_h,
-				timing->dsc_cfg.is_dp);
-#endif
-
-	switch (timing->display_color_depth) {
-	case COLOR_DEPTH_666:
-		bits_per_channel = 6;
-		break;
-	case COLOR_DEPTH_888:
-		bits_per_channel = 8;
-		break;
-	case COLOR_DEPTH_101010:
-		bits_per_channel = 10;
-		break;
-	case COLOR_DEPTH_121212:
-		bits_per_channel = 12;
-		break;
-	case COLOR_DEPTH_141414:
-		bits_per_channel = 14;
-		break;
-	case COLOR_DEPTH_161616:
-		bits_per_channel = 16;
-		break;
-	default:
-		ASSERT(bits_per_channel != 0);
-		bits_per_channel = 8;
-		break;
-	}
-
-	kbps = timing->pix_clk_100hz / 10;
-	kbps *= bits_per_channel;
-
-	if (timing->flags.Y_ONLY != 1) {
-		/*Only YOnly make reduce bandwidth by 1/3 compares to RGB*/
-		kbps *= 3;
-		if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
-			kbps /= 2;
-		else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
-			kbps = kbps * 2 / 3;
-	}
-
-	return kbps;
-
-}
-
 void dc_link_set_drive_settings(struct dc *dc,
 				struct link_training_settings *lt_settings,
 				const struct dc_link *link)
@@ -3769,3 +3722,58 @@ bool dc_link_should_enable_fec(const struct dc_link *link)
 
 	return ret;
 }
+
+uint32_t dc_bandwidth_in_kbps_from_timing(
+		const struct dc_crtc_timing *timing)
+{
+	uint32_t bits_per_channel = 0;
+	uint32_t kbps;
+
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	if (timing->flags.DSC)
+		return dc_dsc_stream_bandwidth_in_kbps(timing,
+				timing->dsc_cfg.bits_per_pixel,
+				timing->dsc_cfg.num_slices_h,
+				timing->dsc_cfg.is_dp);
+#endif
+
+	switch (timing->display_color_depth) {
+	case COLOR_DEPTH_666:
+		bits_per_channel = 6;
+		break;
+	case COLOR_DEPTH_888:
+		bits_per_channel = 8;
+		break;
+	case COLOR_DEPTH_101010:
+		bits_per_channel = 10;
+		break;
+	case COLOR_DEPTH_121212:
+		bits_per_channel = 12;
+		break;
+	case COLOR_DEPTH_141414:
+		bits_per_channel = 14;
+		break;
+	case COLOR_DEPTH_161616:
+		bits_per_channel = 16;
+		break;
+	default:
+		ASSERT(bits_per_channel != 0);
+		bits_per_channel = 8;
+		break;
+	}
+
+	kbps = timing->pix_clk_100hz / 10;
+	kbps *= bits_per_channel;
+
+	if (timing->flags.Y_ONLY != 1) {
+		/*Only YOnly make reduce bandwidth by 1/3 compares to RGB*/
+		kbps *= 3;
+		if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
+			kbps /= 2;
+		else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
+			kbps = kbps * 2 / 3;
+	}
+
+	return kbps;
+
+}