From 7643a7fa16edf180d593f705f4fa5930c40e8d2d Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Wed, 11 Aug 2010 10:06:44 -0700 Subject: [PATCH] drm/i915: eDP mode set sequence corrections We should disable the panel first when shutting down an eDP link. And when turning one on, the panel needs to be enabled before link training or eDP I/O won't be enabled. Signed-off-by: Jesse Barnes --- drivers/gpu/drm/i915/intel_dp.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index d1b4ece4df00..8061a48804a3 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -840,20 +840,19 @@ 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) { - if (dp_reg & DP_PORT_EN) { - intel_dp_link_down(intel_dp); - if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) { - ironlake_edp_backlight_off(dev); - ironlake_edp_panel_off(dev); - } + if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) { + ironlake_edp_backlight_off(dev); + ironlake_edp_panel_off(dev); } + if (dp_reg & DP_PORT_EN) + intel_dp_link_down(intel_dp); } else { if (!(dp_reg & DP_PORT_EN)) { - intel_dp_link_train(intel_dp); - if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) { + if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) ironlake_edp_panel_on(dev); + intel_dp_link_train(intel_dp); + if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) ironlake_edp_backlight_on(dev); - } } } intel_dp->dpms_mode = mode; -- 2.20.1