diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 60 |
1 files changed, 58 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 8061a48804a..caaaa8f9db3 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -831,6 +831,60 @@ static void ironlake_edp_backlight_off (struct drm_device *dev) I915_WRITE(PCH_PP_CONTROL, pp); } +static void ironlake_edp_pll_on(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 dpa_ctl; + + DRM_DEBUG_KMS("\n"); + dpa_ctl = I915_READ(DP_A); + dpa_ctl &= ~DP_PLL_ENABLE; + I915_WRITE(DP_A, dpa_ctl); +} + +static void ironlake_edp_pll_off(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 dpa_ctl; + + dpa_ctl = I915_READ(DP_A); + dpa_ctl |= DP_PLL_ENABLE; + I915_WRITE(DP_A, dpa_ctl); + udelay(200); +} + +static void intel_dp_prepare(struct drm_encoder *encoder) +{ + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + struct drm_device *dev = encoder->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + uint32_t dp_reg = I915_READ(intel_dp->output_reg); + + if (IS_eDP(intel_dp)) { + ironlake_edp_backlight_off(dev); + ironlake_edp_panel_on(dev); + ironlake_edp_pll_on(encoder); + } + if (dp_reg & DP_PORT_EN) + intel_dp_link_down(intel_dp); +} + +static void intel_dp_commit(struct drm_encoder *encoder) +{ + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + struct drm_device *dev = encoder->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + uint32_t dp_reg = I915_READ(intel_dp->output_reg); + + if (!(dp_reg & DP_PORT_EN)) { + intel_dp_link_train(intel_dp); + } + if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) + ironlake_edp_backlight_on(dev); +} + static void intel_dp_dpms(struct drm_encoder *encoder, int mode) { @@ -846,6 +900,8 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) } if (dp_reg & DP_PORT_EN) intel_dp_link_down(intel_dp); + if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) + ironlake_edp_pll_off(encoder); } else { if (!(dp_reg & DP_PORT_EN)) { if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) @@ -1427,9 +1483,9 @@ intel_dp_destroy (struct drm_connector *connector) static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { .dpms = intel_dp_dpms, .mode_fixup = intel_dp_mode_fixup, - .prepare = intel_encoder_prepare, + .prepare = intel_dp_prepare, .mode_set = intel_dp_mode_set, - .commit = intel_encoder_commit, + .commit = intel_dp_commit, }; static const struct drm_connector_funcs intel_dp_connector_funcs = { |