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>
git-mirror · Sep 8, 2010 · 2c9d975 · 2c9d975
1 parent 3ba5c56
commit 2c9d975
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
@@ -894,6 +894,7 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
 	uint32_t dp_reg = I915_READ(intel_dp->output_reg);
 
 	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
+		ironlake_edp_panel_off(dev);
 		ironlake_edp_backlight_off(dev);
 		ironlake_edp_panel_vdd_on(dev);
 		ironlake_edp_pll_on(encoder);