diff options
| author | Zhan Liu <zhan.liu@amd.com> | 2020-02-21 17:25:47 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-02-25 11:02:14 -0500 |
| commit | f739ce5768eddbe573c8b30d8ac109de67c57d29 (patch) | |
| tree | c3d943b4dd20ea3ff26b108e90d8055b7ce74bf7 /drivers | |
| parent | b80cd524ac44a29635eec377c6f845b3c321b592 (diff) | |
| download | linux-f739ce5768eddbe573c8b30d8ac109de67c57d29.tar.bz2 | |
drm/amd/display: Add aconnector condition check for dpcd read
[Why]
core_link_read_dpcd() will invoke dm_helpers_dp_read_dpcd(),
which needs to read dpcd info with the help of aconnector.
If aconnector (dc->links[i]->prev) is NULL, then dpcd status
cannot be read.
As a result, dpcd read fails and a line of error will be
printed out in dmesg.log as:
"*ERROR* Failed to found connector for link!"
[How]
Make sure that aconnector (dc->links[i]->prev) is not NULL,
then read dpcd status.
Signed-off-by: Zhan Liu <zhan.liu@amd.com>
Reviewed-by: Joseph Gravenor <Joseph.Gravenor@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index 5f56cc13d6dc..af40ea5765f4 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -1328,14 +1328,21 @@ void dcn10_init_hw(struct dc *dc) enum dc_status status = DC_ERROR_UNEXPECTED; for (i = 0; i < dc->link_count; i++) { - if (dc->links[i]->connector_signal != SIGNAL_TYPE_DISPLAY_PORT) { + if (dc->links[i]->connector_signal != SIGNAL_TYPE_DISPLAY_PORT) continue; - } - /* if any of the displays are lit up turn them off */ - status = core_link_read_dpcd(dc->links[i], DP_SET_POWER, - &dpcd_power_state, sizeof(dpcd_power_state)); - if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0) { - dp_receiver_power_ctrl(dc->links[i], false); + + /* + * core_link_read_dpcd() will invoke dm_helpers_dp_read_dpcd(), + * which needs to read dpcd info with the help of aconnector. + * If aconnector (dc->links[i]->prev) is NULL, then dpcd status + * cannot be read. + */ + if (dc->links[i]->priv) { + /* if any of the displays are lit up turn them off */ + status = core_link_read_dpcd(dc->links[i], DP_SET_POWER, + &dpcd_power_state, sizeof(dpcd_power_state)); + if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0) + dp_receiver_power_ctrl(dc->links[i], false); } } } |