[Intel-gfx] [PATCH 0/1] idea for optimize i915 initial time with eDP

[ning.a.zhang at intel.com]

From: Zhang Ning <ning.a.zhang at intel.com>

I find it on Broxton Gorden Peak, its BIOS doesn't have GOP driver.
displays are powered on by Linux kernel (i915 driver). not BIOS.

For eDP panel, power on it requires to fully powered off, that means wait enough time.

when i915 tries to power on eDP panel, it set last_off_timestamp to driver init time,
this assumes eDP is already powered on.
this is not right on no GOP system, eDP is never powered on.

Then set it to kernel time 0, I know this not right, in two way:

1, this is not *real* last_off_timestamp, can't set an negtive timestamp.
2, no check system with GOP or without GOP, or check whether eDP is powered on.

due to I don't have system with GOP and eDP, can't fully verify my idea.

Zhang Ning (1):
  initial panel_power_off_time should be 0

 drivers/gpu/drm/i915/intel_dp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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2.18.0