diff options
| author | Artem Grishin <Artem.Grishin@amd.com> | 2023-03-14 23:11:39 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-03-31 18:18:54 +0300 |
| commit | a78d43738ead68a40acf7da8a873f47a9f6e6eb3 (patch) | |
| tree | 39bcd2fc6cc31d26c204c3f8ce0574beea8e6438 /drivers/gpu/drm/amd | |
| parent | 37403ced9f2873fab7f39ab4ac963bbb33fb0bc0 (diff) | |
| download | linux-a78d43738ead68a40acf7da8a873f47a9f6e6eb3.tar.xz | |
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: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Artem Grishin <Artem.Grishin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd')
3 files changed, 16 insertions, 9 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h index af53278662ec..49aab1924665 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h @@ -47,14 +47,15 @@ enum dc_lane_count { */ enum dc_link_rate { LINK_RATE_UNKNOWN = 0, - LINK_RATE_LOW = 0x06, // Rate_1 (RBR) - 1.62 Gbps/Lane - LINK_RATE_RATE_2 = 0x08, // Rate_2 - 2.16 Gbps/Lane - LINK_RATE_RATE_3 = 0x09, // Rate_3 - 2.43 Gbps/Lane - LINK_RATE_HIGH = 0x0A, // Rate_4 (HBR) - 2.70 Gbps/Lane - 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_LOW = 0x06, // Rate_1 (RBR) - 1.62 Gbps/Lane + LINK_RATE_RATE_2 = 0x08, // Rate_2 - 2.16 Gbps/Lane + LINK_RATE_RATE_3 = 0x09, // Rate_3 - 2.43 Gbps/Lane + LINK_RATE_HIGH = 0x0A, // Rate_4 (HBR) - 2.70 Gbps/Lane + 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_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 */ diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c index 2a2443535b67..7d7edbb2cf52 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c @@ -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; diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c index 10261764a0ce..f301c9eaf2f9 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c @@ -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; |