Commit 5c8a6c71 authored by Jing Zhou's avatar Jing Zhou Committed by Alex Deucher
Browse files

drm/amd/display: Set default bits per channel 



[Why]
Bump into calcReducedBlankingTiming because of mode query failed.
In this function,
timing.displayColorDepth == DISPLAY_COLOR_DEPTH_UNDEFINED.
Then req_bw == 0 because of bits_per_channel == 0.
So decide edp link settings, use default RBRx1 for special timing.

[How]
Set default bits_per_channel is 8.

Signed-off-by: default avatarJing Zhou <Jing.Zhou@amd.com>
Reviewed-by: default avatarAric Cyr <Aric.Cyr@amd.com>
Acked-by: default avatarEryk Brol <eryk.brol@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 92f1fa0d

drivers/gpu/drm/amd/display/dc/core/dc_link.c

+2 −2
Original line number Diff line number Diff line
@@ -3471,11 +3471,11 @@ uint32_t dc_bandwidth_in_kbps_from_timing( 
		bits_per_channel = 16;

		break;

	default:

		ASSERT(bits_per_channel != 0);

		bits_per_channel = 8;

		break;

	}



	ASSERT(bits_per_channel != 0);



	kbps = timing->pix_clk_100hz / 10;

	kbps *= bits_per_channel;

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

+12 −3
Original line number Diff line number Diff line
@@ -1410,15 +1410,24 @@ static void print_status_message( 
	case LINK_RATE_LOW:

		link_rate = "RBR";

		break;

	case LINK_RATE_RATE_2:

		link_rate = "R2";

		break;

	case LINK_RATE_RATE_3:

		link_rate = "R3";

		break;

	case LINK_RATE_HIGH:

		link_rate = "HBR";

		break;

	case LINK_RATE_HIGH2:

		link_rate = "HBR2";

		break;

	case LINK_RATE_RBR2:

		link_rate = "RBR2";

		break;

	case LINK_RATE_RATE_6:

		link_rate = "R6";

		break;

	case LINK_RATE_HIGH2:

		link_rate = "HBR2";

		break;

	case LINK_RATE_HIGH3:

		link_rate = "HBR3";

		break;