[Intel-gfx] [PATCH v4 8/8] drm/i915: Remove vblank wait from hsw_enable_ips.

[Zanoni, Paulo R]

Em Qua, 2016-02-10 às 13:49 +0100, Maarten Lankhorst escreveu:
> intel_post_plane_update did an extra vblank wait that's no longer
> needed when enabling ips.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 6bb1f5dbc7a0..19a8d376d63e 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4569,9 +4569,6 @@ 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 */

Perhaps we can keep the comment, but change it into something like:

/* We can only enable IPS after we enable a plane and wait for a
vblank, but we don't need the wait here because of XYZ. */

> -	intel_wait_for_vblank(dev, crtc->pipe);
> -
>  	assert_plane_enabled(dev_priv, crtc->plane);
>  	if (IS_BROADWELL(dev)) {
>  		mutex_lock(&dev_priv->rps.hw_lock);