drm: Do not call drm_dp_cec_set_edid() while registering DP connectors
authorJosé Roberto de Souza <jose.souza@intel.com>
Thu, 11 Oct 2018 00:44:39 +0000 (17:44 -0700)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 11 Oct 2018 08:52:35 +0000 (10:52 +0200)
commit7323001549804be70b179a8b636f78e758aeb28d
tree27ecf7a93cda6ce0e47d28ea44542fbfff141d35
parent2a7be4b4a9a57c3f3adeafd1fc9e453448dc8275
drm: Do not call drm_dp_cec_set_edid() while registering DP connectors

drm_dp_cec_register_connector() is called when registering each DP
connector in DRM, while sounds a good idea register CEC adapters as
earlier as possible, it causes some driver initialization delay
trying to do DPCD transactions in disconnected connectors.

This change will cause no regressions as drm_dp_cec_set_edid() will
still be called in further detection of connected connectors with a
valid edid parameter.

This change reduced the module load of i915 by average 0.5sec in a
machine with just one DP port disconnected while reducing more than
3sec in a machine with 4 DP ports disconnected.

Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181011004439.4482-1-jose.souza@intel.com
drivers/gpu/drm/drm_dp_cec.c