drm/i915/dp/mst: Fix MST logic in intel_dp_long_pulse()
authorjim.bride@linux.intel.com <jim.bride@linux.intel.com>
Mon, 11 Apr 2016 17:11:24 +0000 (10:11 -0700)
committerAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Tue, 19 Apr 2016 15:43:32 +0000 (18:43 +0300)
commit0e505a08b539e55d849345cecd606c85090a660b
treea9fc4532a2b5b4952672a48c4cf77302f858a3e3
parente10fa551ae37b796d7ae60e5a951c18d00c2bbf0
drm/i915/dp/mst: Fix MST logic in intel_dp_long_pulse()

In commit 7d23e3c37bb3 ("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 7d23e3c37bb3 ("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
drivers/gpu/drm/i915/intel_dp.c