[Bug 100572] [i915][SKL] Headless mode media transcoding is 20-30% slower comparing to connected monitor use case

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100572

--- Comment #1 from Dmitry Rogozhkin <dmitry.v.rogozhkin at intel.com> ---
I am attaching 3 dmesg shots corresponding to the following command sequence:

# dmesg > dmesg.0.after_boot
#
# ./run_libyami.sh
3596 frame decoded, fps = 143.44. fps after 5 frames = 143.55.
transcode done
# ./run_libyami.sh
3596 frame decoded, fps = 160.02. fps after 5 frames = 160.18.
transcode done
#
# dmesg > dmesg.1.headless
#
# cat /sys/class/drm/card0-HDMI-A-1/status
disconnected
#
# echo on > /sys/class/drm/card0-HDMI-A-1/status
# cat /sys/class/drm/card0-HDMI-A-1/status
connected
#
# ./run_libyami.sh
3596 frame decoded, fps = 197.47. fps after 5 frames = 197.67.
transcode done
# ./run_wrap.libyami.sh
3596 frame decoded, fps = 209.68. fps after 5 frames = 209.91.
transcode done
#
# dmesg > dmesg.1.hdmi-a-ON

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