diff options
| author | Sung Joon Kim <sungkim@amd.com> | 2022-06-07 11:36:29 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-06-21 18:17:23 -0400 |
| commit | 06f2f7772dc7ff2e3734e654cb2d0b588076860d (patch) | |
| tree | cac43e240ceb19e09002d9abc70ed9961bff014a /drivers/gpu/drm/amd/display/dc/dc.h | |
| parent | f04d275d94e164d24516c32437c988a323018f63 (diff) | |
| download | linux-06f2f7772dc7ff2e3734e654cb2d0b588076860d.tar.bz2 | |
drm/amd/display: Fix eDP not light up on resume
[why]
Only on VG, if external display is disconnected during S3 suspend, the
internal panel doesn't light up on resume because we set the power state
using an unsupported DPCD register SET_POWER. To check the register is
supported, we need to check SET_POWER_CAPABLE first which is
eDP-specific DPCD register field.
[how]
Check the SET_POWER_CAPABLE register field and decide the control of the
eDP power state based on the read register value.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Agustin Gutierrez <Agustin.Gutierrez@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Sung Joon Kim <sungkim@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dc.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index ba57e03d3d9e..51f5d75bf9e3 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -1245,6 +1245,7 @@ struct dpcd_caps { bool panel_mode_edp; bool dpcd_display_control_capable; bool ext_receiver_cap_field_present; + bool set_power_state_capable_edp; bool dynamic_backlight_capable_edp; union dpcd_fec_capability fec_cap; struct dpcd_dsc_capabilities dsc_caps; |