From: Artem Grishin <artem.gris...@amd.com>
[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....@amd.com>
Acked-by: Qingqing Zhuo <qingqing.z...@amd.com>
Signed-off-by: Artem Grishin <artem.gris...@amd.com>
---
drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 17 +++++++++--------
.../dc/link/protocols/link_dp_capability.c | 5 ++++-
.../dc/link/protocols/link_dp_training.c | 3 +++
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;
--
2.34.1
