From 5e7b94a8e44fb137a9b40be8422833b3b343daf7 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Wed, 5 Oct 2011 19:53:09 -0700 Subject: [PATCH] drm/i915: Ensure panel is on during DPMS off If the panel is already off, we'll need to turn VDD on to execute the (useless) DPMS off code. Yes, it would be better to just not do any of this, but correctness, and *then* performance. Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 7e59f060a03b5..68bcd77962e93 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1073,6 +1073,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) uint32_t dp_reg = I915_READ(intel_dp->output_reg); if (mode != DRM_MODE_DPMS_ON) { + ironlake_edp_panel_vdd_on(intel_dp); if (is_edp(intel_dp)) ironlake_edp_backlight_off(dev); intel_dp_sink_dpms(intel_dp, mode); @@ -1080,6 +1081,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) ironlake_edp_panel_off(dev); if (is_edp(intel_dp) && !is_pch_edp(intel_dp)) ironlake_edp_pll_off(encoder); + ironlake_edp_panel_vdd_off(intel_dp); } else { ironlake_edp_panel_vdd_on(intel_dp); intel_dp_sink_dpms(intel_dp, mode); -- 2.39.5