diff options
| author | Jun Lei <jun.lei@amd.com> | 2020-11-24 11:58:19 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-01-13 23:43:56 -0500 |
| commit | cf3a2627597794797ce5930537c0e75df284b6e9 (patch) | |
| tree | e6b845ce7247f6f3e5142b195935d7182239f812 /drivers/gpu/drm/amd/display/dc/dce110 | |
| parent | ea0124a7d23000acfbb6bc11953b75b21a97555a (diff) | |
drm/amd/display: implement T12 compliance
[why]
When OS reboots, and panel is turned off, T12 may not be maintained.
T12 is defined as the interval between VDDC off (occurs at shutdown) and
the next VDDC on (occurs when eDP is POST-ed)
[how]
DC already tracks panel power off time. Add a DC interface which DM can
call during shutdown. Ideally this should be as late as possible during
the shutdown sequence so the extra delay is minimal.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Jun Lei <jun.lei@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce110')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index 4c230f1de9a3..3e9abb1b8e14 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -921,6 +921,37 @@ void dce110_edp_power_control( } } +void dce110_edp_wait_for_T12( + struct dc_link *link) +{ + struct dc_context *ctx = link->ctx; + + if (dal_graphics_object_id_get_connector_id(link->link_enc->connector) + != CONNECTOR_ID_EDP) { + BREAK_TO_DEBUGGER(); + return; + } + + if (!link->panel_cntl) + return; + + if (!link->panel_cntl->funcs->is_panel_powered_on(link->panel_cntl) && + link->link_trace.time_stamp.edp_poweroff != 0) { + unsigned int t12_duration = 500; // Default T12 as per spec + unsigned long long current_ts = dm_get_timestamp(ctx); + unsigned long long time_since_edp_poweroff_ms = + div64_u64(dm_get_elapse_time_in_ns( + ctx, + current_ts, + link->link_trace.time_stamp.edp_poweroff), 1000000); + + t12_duration += link->local_sink->edid_caps.panel_patch.extra_t12_ms; // Add extra T12 + + if (time_since_edp_poweroff_ms < t12_duration) + msleep(t12_duration - time_since_edp_poweroff_ms); + } +} + /*todo: cloned in stream enc, fix*/ /* * @brief |