Re: [PATCH 2/5] drm/i915: Wait for vblank in hsw_enable_ips()

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Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>


On Tue, Apr 15, 2014 at 11:41 AM, <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

Now that the vblank wait is gone from intel_enable_primary_plane(),
hsw_enable_ips() needs to do the vblank wait itself.

Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_display.c | 12 ++++++------
 drivers/gpu/drm/i915/intel_sprite.c  |  5 +----
 2 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 32c6c16..33d21bf 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3543,17 +3543,17 @@ static void intel_disable_planes(struct drm_crtc *crtc)

 void hsw_enable_ips(struct intel_crtc *crtc)
 {
-       struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
+       struct drm_device *dev = crtc->base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;

        if (!crtc->config.ips_enabled)
                return;

-       /* We can only enable IPS after we enable a plane and wait for a vblank.
-        * We guarantee that the plane is enabled by calling intel_enable_ips
-        * only after intel_enable_plane. And intel_enable_plane already waits
-        * for a vblank, so all we need to do here is to enable the IPS bit. */
+       /* We can only enable IPS after we enable a plane and wait for a vblank */
+       intel_wait_for_vblank(dev, crtc->pipe);
+
        assert_plane_enabled(dev_priv, crtc->plane);
-       if (IS_BROADWELL(crtc->base.dev)) {
+       if (IS_BROADWELL(dev)) {
                mutex_lock(&dev_priv->rps.hw_lock);
                WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0xc0000000));
                mutex_unlock(&dev_priv->rps.hw_lock);
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 336ae6c..4df7245 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -540,10 +540,7 @@ intel_enable_primary(struct drm_crtc *crtc)
         * when going from primary only to sprite only and vice
         * versa.
         */
-       if (intel_crtc->config.ips_enabled) {
-               intel_wait_for_vblank(dev, intel_crtc->pipe);
-               hsw_enable_ips(intel_crtc);
-       }
+       hsw_enable_ips(intel_crtc);

        mutex_lock(&dev->struct_mutex);
        intel_update_fbc(dev);
--
1.8.3.2

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--
Rodrigo Vivi
Blog: http://blog.vivi.eng.br
 
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