drm/i915: properly disable the VDD when disabling the panel

Commit b3064154dfd37deb386b1e459c54e1ca2460b3d5 tried to revert commit
dff392dbd258381a6c3164f38420593f2d291e3b, but wasn't complete, which
resulted in regressions on Haswell. So this commit should fix
b3064154dfd37deb386b1e459c54e1ca2460b3d5 by undoing what it did and
providing an actual complete revert of
dff392dbd258381a6c3164f38420593f2d291e3b.

Fixes regression introduced by:
commit b3064154dfd37deb386b1e459c54e1ca2460b3d5
Author: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Date:   Tue Mar 4 00:42:44 2014 +0100
    drm/i915: Don't just say it, actually force edp vdd

Testcase: igt/pm_pc8
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 3565d61531f0281cf4e32a0f5e02a90b07e6f13a..fe1f5f012c4f7b76902c9ae4d6db912eac7a843a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1340,6 +1340,7 @@ static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
        if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
                struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
                intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
+               edp_panel_vdd_on(intel_dp);
                intel_edp_panel_off(intel_dp);
        }
 

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index d2b2f51f839fe949d39d845706be7081b884c722..a76406b3b61075da1f8cc42cc3b7506fbc16f984 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -91,7 +91,6 @@ static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
 }
 
 static void intel_dp_link_down(struct intel_dp *intel_dp);
-static void edp_panel_vdd_on(struct intel_dp *intel_dp);
 static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
 
 static int
@@ -1162,7 +1161,7 @@ static  u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
        return control;
 }
 
-static void edp_panel_vdd_on(struct intel_dp *intel_dp)
+void edp_panel_vdd_on(struct intel_dp *intel_dp)
 {
        struct drm_device *dev = intel_dp_to_dev(intel_dp);
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1338,11 +1337,16 @@ void intel_edp_panel_off(struct intel_dp *intel_dp)
 
        pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
 
+       intel_dp->want_panel_vdd = false;
+
        I915_WRITE(pp_ctrl_reg, pp);
        POSTING_READ(pp_ctrl_reg);
 
        intel_dp->last_power_cycle = jiffies;
        wait_panel_off(intel_dp);
+
+       /* We got a reference when we enabled the VDD. */
+       intel_runtime_pm_put(dev_priv);
 }
 
 void intel_edp_backlight_on(struct intel_dp *intel_dp)
@@ -1880,7 +1884,6 @@ static void intel_disable_dp(struct intel_encoder *encoder)
        intel_edp_backlight_off(intel_dp);
        intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
        intel_edp_panel_off(intel_dp);
-       edp_panel_vdd_off(intel_dp, true);
 
        /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */
        if (!(port == PORT_A || IS_VALLEYVIEW(dev)))

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 2546cae0b4f03dc7dfae4e5a0d5d19f92dd8b6b9..20e11f24b9a14d794423418829d37956eac613dc 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -767,6 +767,7 @@ void intel_edp_panel_off(struct intel_dp *intel_dp);
 void intel_edp_psr_enable(struct intel_dp *intel_dp);
 void intel_edp_psr_disable(struct intel_dp *intel_dp);
 void intel_edp_psr_update(struct drm_device *dev);
+void edp_panel_vdd_on(struct intel_dp *intel_dp);
 
 
 /* intel_dsi.c */