From 33fd78c754149cf8cee4089b1dfdd85ef4264146 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Tue, 1 Nov 2011 20:25:21 -0700 Subject: drm/i915: Make DP prepare/commit consistent with DP dpms Make sure the sequence of operations in all three functions makes sense: 1) The backlight must be off unless the screen is running 2) The link must be running to turn the eDP panel on/off 3) The CPU eDP PLL must be running until everything is off Signed-off-by: Keith Packard Signed-off-by: Eugeni Dodonov --- drivers/gpu/drm/i915/intel_dp.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 81112cb2007..b00f465977f 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1248,17 +1248,18 @@ static void intel_dp_prepare(struct drm_encoder *encoder) { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + ironlake_edp_backlight_off(intel_dp); + ironlake_edp_panel_off(intel_dp); + /* Wake up the sink first */ ironlake_edp_panel_vdd_on(intel_dp); intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); + intel_dp_link_down(intel_dp); ironlake_edp_panel_vdd_off(intel_dp, false); /* Make sure the panel is off before trying to * change the mode */ - ironlake_edp_backlight_off(intel_dp); - intel_dp_link_down(intel_dp); - ironlake_edp_panel_off(intel_dp); } static void intel_dp_commit(struct drm_encoder *encoder) @@ -1290,16 +1291,20 @@ 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_backlight_off(intel_dp); + ironlake_edp_panel_off(intel_dp); + ironlake_edp_panel_vdd_on(intel_dp); - if (is_edp(intel_dp)) - ironlake_edp_backlight_off(intel_dp); intel_dp_sink_dpms(intel_dp, mode); intel_dp_link_down(intel_dp); - ironlake_edp_panel_off(intel_dp); - if (is_edp(intel_dp) && !is_pch_edp(intel_dp)) - ironlake_edp_pll_off(encoder); ironlake_edp_panel_vdd_off(intel_dp, false); + + if (is_cpu_edp(intel_dp)) + ironlake_edp_pll_off(encoder); } else { + if (is_cpu_edp(intel_dp)) + ironlake_edp_pll_on(encoder); + ironlake_edp_panel_vdd_on(intel_dp); intel_dp_sink_dpms(intel_dp, mode); if (!(dp_reg & DP_PORT_EN)) { @@ -1307,7 +1312,6 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) ironlake_edp_panel_on(intel_dp); ironlake_edp_panel_vdd_off(intel_dp, true); intel_dp_complete_link_train(intel_dp); - ironlake_edp_backlight_on(intel_dp); } else ironlake_edp_panel_vdd_off(intel_dp, false); ironlake_edp_backlight_on(intel_dp); -- cgit v1.2.3