drm/i915: Remove vblank wait from hsw_enable_ips, v2.

intel_post_plane_update did an extra vblank wait that's no longer needed when enabling ips.

Changes since v1:
- Add comment explaining why vblank wait is performed. (Paulo)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/56F29B28.5070804@linux.intel.com

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 009b03b..7c4ffca 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4412,8 +4412,11 @@ void hsw_enable_ips(struct intel_crtc *crtc)
        if (!crtc->config->ips_enabled)
                return;
 
-       /* We can only enable IPS after we enable a plane and wait for a vblank */
-       intel_wait_for_vblank(dev, crtc->pipe);
+       /*
+        * We can only enable IPS after we enable a plane and wait for a vblank
+        * This function is called from post_plane_update, which is run after
+        * a vblank wait.
+        */
 
        assert_plane_enabled(dev_priv, crtc->plane);
        if (IS_BROADWELL(dev)) {