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drm/i915: make sure panel is sequenced off when starting a mode set 

Otherwise we may not be able to train the DP link.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Jesse Barnes 2010-09-08 12:42:05 -07:00 committed by Chris Wilson
parent 3ba5c569c4
commit 2c9d975459
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/i915/intel_dp.c
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@ -894,6 +894,7 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
uint32_t dp_reg = I915_READ(intel_dp->output_reg); uint32_t dp_reg = I915_READ(intel_dp->output_reg);
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) { if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
ironlake_edp_panel_off(dev);
ironlake_edp_backlight_off(dev); ironlake_edp_backlight_off(dev);
ironlake_edp_panel_vdd_on(dev); ironlake_edp_panel_vdd_on(dev);
ironlake_edp_pll_on(encoder); ironlake_edp_pll_on(encoder);