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drm/i915/dp/mst: Fix MST logic in intel_dp_long_pulse()

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In commit 7d23e3c37b ("drm/i915: Cleaning up intel_dp_hpd_pulse") some
much needed clean-up was done, but unfortunately part of the change
broke DP MST.  The real issue was setting the connector state to
disconnected in the MST case, which is good, but the code then (after
a goto) checks if the connector state is not connected and shuts down
MST if this is the case, which is bad.  With this change both SST and
MST seem to be happy.

v2: Add removed check further up in the function to be sure that MST
    is shut down when we lose the link. (Ander)

Fixes: commit 7d23e3c37b ("drm/i915: Cleaning up intel_dp_hpd_pulse")
cc: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
cc: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
cc: Ander Conselvan de Oliveira <conselvan2@gmail.com>
cc: Nathan D Ciobanu <nathan.d.ciobanu@intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Reviewed-by: Lyude <cpaul@redhat.com>
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460394684-7036-1-git-send-email-jim.bride@linux.intel.com
This commit is contained in:
jim.bride@linux.intel.com 2016-04-11 10:11:24 -07:00 committed by Ander Conselvan de Oliveira
parent e10fa551ae
commit 0e505a08b5
1 changed files with 11 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/gpu/drm/i915/intel_dp.c
View File

@ -4578,6 +4578,15 @@ intel_dp_long_pulse(struct intel_connector *intel_connector)
intel_dp->compliance_test_type = 0;
intel_dp->compliance_test_data = 0;
if (intel_dp->is_mst) {
DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
intel_dp->is_mst,
intel_dp->mst_mgr.mst_state);
intel_dp->is_mst = false;
drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
intel_dp->is_mst);
}
goto out;
}
@ -4635,20 +4644,9 @@ intel_dp_long_pulse(struct intel_connector *intel_connector)
}
out:
if (status != connector_status_connected) {
if ((status != connector_status_connected) &&
(intel_dp->is_mst == false))
intel_dp_unset_edid(intel_dp);
/*
* If we were in MST mode, and device is not there,
* get out of MST mode
*/
if (intel_dp->is_mst) {
DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
intel_dp->is_mst, intel_dp->mst_mgr.mst_state);
intel_dp->is_mst = false;
drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
intel_dp->is_mst);
}
}
intel_display_power_put(to_i915(dev), power_domain);
return;