github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 16:44:58 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/i915/dp_tunnel: Don't update tunnel state during system resume

Browse Source 
During system resume, restoring the pre-suspend display state must not
fail. This requires preserving the sink capabilities from before
suspend, including the available link bandwidth.

If these capabilities are not preserved, the restore modeset may fail,
either due to a missing sink capability or insufficient link bandwidth
for the restored mode.

When the sink is connected through a DP tunnel, prevent such capability
changes by skipping tunnel state updates during resume. This also avoids
updating the sink state via the tunnel while it is being resumed.

Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260219182823.926702-2-imre.deak@intel.com
This commit is contained in:
Imre Deak 2026-02-19 20:28:19 +02:00
parent 13665885b1
commit afe3f74716
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/i915/display/intel_dp_tunnel.c
View File

@ -150,11 +150,9 @@ static int allocate_initial_tunnel_bw_for_pipes(struct intel_dp *intel_dp, u8 pi
drm_dp_tunnel_name(intel_dp->tunnel),
encoder->base.base.id, encoder->base.name,
ERR_PTR(err));
return err;
}
return update_tunnel_state(intel_dp);
return err;
}
static int allocate_initial_tunnel_bw(struct intel_dp *intel_dp,
@ -200,10 +198,13 @@ static int detect_new_tunnel(struct intel_dp *intel_dp, struct drm_modeset_acqui
}
ret = allocate_initial_tunnel_bw(intel_dp, ctx);
if (ret < 0)
if (ret < 0) {
intel_dp_tunnel_destroy(intel_dp);
return ret;
return ret;
}
return update_tunnel_state(intel_dp);
}
/**