drm/i915: set the backlight panel delays registers to 1
authorPaulo Zanoni <paulo.r.zanoni@intel.com>
Thu, 19 Dec 2013 16:29:44 +0000 (14:29 -0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 24 Jan 2014 16:22:52 +0000 (17:22 +0100)
commitb2f19d1a1d7b262cf5fbe6033776afcf6d1ab526
tree768874bae03155551564c7c398f6374137806c88
parent412b61d83a2d3e74527633097820db7510f97ce1
drm/i915: set the backlight panel delays registers to 1

Because we already do the wait in software: see
ironlake_wait_backlight_on and ironlake_edp_wait_backlight_off.

For the "backlight on" delay, even BSpec says we need to program 0x1
to PP_ON_DELAYS 12:0.

For the "backlight off" delay, if we don't do the same thing, when we
call ironlake_wait_panel_off we'll end up waiting for the it again.

On my machine the off delay is 200ms, so we save this amount of time
whenever we disable the panel (e.g, suspend).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_dp.c