drm/i915: Don't read dpcd for disconnected ports
authorMika Kuoppala <mika.kuoppala@linux.intel.com>
Fri, 15 May 2015 10:09:21 +0000 (13:09 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 20 May 2015 09:25:57 +0000 (11:25 +0200)
commit5c1a88754c766b6a66bcd5600de15e4b4baa795a
tree7cb483b0a5fb7c695f670ca4b0c65c53ba501035
parent5a1cc6550dc6620e67b792a27da8bbd03a09cafb
drm/i915: Don't read dpcd for disconnected ports

Reading from disconnected ports will spit out timeout error
on the dmesg. Skip the attempted read if the port is not
connected and avoid confusing users/testcases about
expected timeouts.

This new dpcd debugfs entry was introduced by commit aa7471d228eb
("drm/i915: add i915 specific connector debugfs file for DPCD")

v2 by Jani: move the check at the top, out of the loop.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90060
Tested-by: yex.tian@intel.com
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Bob Paauwe <bob.j.paauwe@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_debugfs.c