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drm/i915: make sure VDD AUX power has time to settle 

When turning on or off the VDD AUX bit, we need to give the panel time
to start or stop or AUX transactions may fail.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
hifive-unleashed-5.1
Jesse Barnes 2010-08-25 13:09:48 -07:00 committed by Chris Wilson
parent 3969c9c927
commit 3ba5c569c4
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/intel_dp.c
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@ -825,6 +825,7 @@ static void ironlake_edp_panel_vdd_on(struct drm_device *dev)
pp |= EDP_FORCE_VDD;
I915_WRITE(PCH_PP_CONTROL, pp);
POSTING_READ(PCH_PP_CONTROL);
msleep(300);
}
static void ironlake_edp_panel_vdd_off(struct drm_device *dev)
@ -836,6 +837,7 @@ static void ironlake_edp_panel_vdd_off(struct drm_device *dev)
pp &= ~EDP_FORCE_VDD;
I915_WRITE(PCH_PP_CONTROL, pp);
POSTING_READ(PCH_PP_CONTROL);
msleep(300);
}
static void ironlake_edp_backlight_on (struct drm_device *dev)