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| author | Derek Lai <Derek.Lai@amd.com> | 2018-12-11 11:27:09 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-01-14 23:40:08 +0300 |
| commit | b03a599b3e1f520e79d3dbf487179bd0d70d4681 (patch) | |
| tree | 35640d1a7b0cf19d3ac5df3aed96376800d26f86 /drivers/gpu/drm/amd/display/dc/dc_dp_types.h | |
| parent | 7eb9097541706a71dfda01e456cae2930f24b10a (diff) | |
| download | linux-b03a599b3e1f520e79d3dbf487179bd0d70d4681.tar.xz | |
drm/amd/display: Set link rate set if eDP ver >= 1.4.
[Why]
If eDP ver >= 1.4,
the Source device must use LINK_RATE_SET.
[How]
Get LINK_RATE_SET by reading DPCD 10h-1fh,
then write DPCD 00115h before link training.
Signed-off-by: Derek Lai <Derek.Lai@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dc_dp_types.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 13 |
1 files changed, 8 insertions, 5 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 da93ab43f2d8..d4eab33c453b 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h @@ -46,11 +46,14 @@ enum dc_lane_count { */ enum dc_link_rate { LINK_RATE_UNKNOWN = 0, - LINK_RATE_LOW = 0x06, - LINK_RATE_HIGH = 0x0A, - LINK_RATE_RBR2 = 0x0C, - LINK_RATE_HIGH2 = 0x14, - LINK_RATE_HIGH3 = 0x1E + 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 }; enum dc_link_spread { |