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 <jbar...@virtuousgeek.org>
---
drivers/gpu/drm/i915/intel_dp.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 2f7eb5d..3836f1f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -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)
--
1.6.3.3
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