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author | 2019-06-24 10:34:13 -0400 | |
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committer | 2019-08-15 10:53:30 -0500 | |
commit | 0b226322434c7786381d7a594efca9cc46f85211 (patch) | |
tree | 77444e6807ceac9e22bf0f4344af6d76604c7a01 /drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h | |
parent | drm/amd/display: Improve sharing of HUBBUB register lists (diff) | |
download | linux-dev-0b226322434c7786381d7a594efca9cc46f85211.tar.xz linux-dev-0b226322434c7786381d7a594efca9cc46f85211.zip |
drm/amd/display: Synchronous DisplayPort Link Training
[WHY]
We require a method to perform synchronous link training.
[HOW]
Sync LT is broken into 3 basic steps.
"Begin" starts the state machine, and resets "preferred" link settings.
"Attempt" will attempt to train the link with a given set of training
parameters.
"End" stops the state machine, and will optionally disable the link phy.
Between "Begin" and "End" DPCD:600h must not be set to "2"
(D3:Powered Down).
Between "Begin" and "End", there may be multiple "Attempts" with different
training parameters.
Signed-off-by: David Galiffi <david.galiffi@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@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/inc/dc_link_dp.h')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h index c5293f9508fa..2ef23963e1f7 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h +++ b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h @@ -62,6 +62,9 @@ bool is_dp_active_dongle(const struct dc_link *link); void dp_enable_mst_on_sink(struct dc_link *link, bool enable); +enum dp_panel_mode dp_get_panel_mode(struct dc_link *link); +void dp_set_panel_mode(struct dc_link *link, enum dp_panel_mode panel_mode); + #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT void dp_set_fec_ready(struct dc_link *link, bool ready); void dp_set_fec_enable(struct dc_link *link, bool enable); |