Commit a78d4373 authored by Artem Grishin's avatar Artem Grishin Committed by Alex Deucher
Browse files

drm/amd/display: Add support for 6.75 GBps link rate 



[Why]
The latest eDP spec version 1.5 defines a new generic link
rate of 6.75 Gbps/Lane, which needs to be supported in the driver.

[How]
Added new element to the dc_link_rate enum

Reviewed-by: default avatarCharlene Liu <Charlene.Liu@amd.com>
Acked-by: default avatarQingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: default avatarArtem Grishin <Artem.Grishin@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 37403ced

drivers/gpu/drm/amd/display/dc/dc_dp_types.h

+9 −8
Original line number Diff line number Diff line
@@ -54,7 +54,8 @@ enum dc_link_rate { 
	LINK_RATE_RBR2 = 0x0C,		// Rate_5 (RBR2) - 3.24 Gbps/Lane

	LINK_RATE_RATE_6 = 0x10,	// Rate_6        - 4.32 Gbps/Lane

	LINK_RATE_HIGH2 = 0x14,		// Rate_7 (HBR2) - 5.40 Gbps/Lane

	LINK_RATE_HIGH3 = 0x1E,		// Rate_8 (HBR3)- 8.10 Gbps/Lane

	LINK_RATE_RATE_8 = 0x19,	// Rate_8        - 6.75 Gbps/Lane

	LINK_RATE_HIGH3 = 0x1E,		// Rate_9 (HBR3) - 8.10 Gbps/Lane

	/* Starting from DP2.0 link rate enum directly represents actual

	 * link rate value in unit of 10 mbps

	 */

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c

+4 −1
Original line number Diff line number Diff line
@@ -203,8 +203,11 @@ static enum dc_link_rate linkRateInKHzToLinkRateMultiplier(uint32_t link_rate_in 
	case 5400000:

		link_rate = LINK_RATE_HIGH2;	// Rate_7 (HBR2)- 5.40 Gbps/Lane

		break;

	case 6750000:

		link_rate = LINK_RATE_RATE_8;	// Rate_8	- 6.75 Gbps/Lane

		break;

	case 8100000:

		link_rate = LINK_RATE_HIGH3;	// Rate_8 (HBR3)- 8.10 Gbps/Lane

		link_rate = LINK_RATE_HIGH3;	// Rate_9 (HBR3)- 8.10 Gbps/Lane

		break;

	default:

		link_rate = LINK_RATE_UNKNOWN;

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c

+3 −0
Original line number Diff line number Diff line
@@ -86,6 +86,9 @@ void dp_log_training_result( 
	case LINK_RATE_HIGH2:

		link_rate = "HBR2";

		break;

	case LINK_RATE_RATE_8:

		link_rate = "R8";

		break;

	case LINK_RATE_HIGH3:

		link_rate = "HBR3";

		break;