[Intel-gfx] [PATCH rebased 1/3] drm/i915/dc3co: Do the full calculation of DC3CO exit only once

[Anshuman Gupta]

Looks good to me.
On 2020-01-16 at 10:54:19 -0800, José Roberto de Souza wrote:
> This will calculaet the DC3CO exit delay only once per full modeset.
> 
> Cc: Imre Deak <imre.deak at intel.com>
> Cc: Anshuman Gupta <anshuman.gupta at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
Reviewed-by: Anshuman Gupta <anshuman.gupta at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_psr.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index 1d2fd1a8925a..e64e0c4c80dc 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -802,7 +802,9 @@ static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
>  	dev_priv->psr.busy_frontbuffer_bits = 0;
>  	dev_priv->psr.pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;
>  	dev_priv->psr.dc3co_enabled = !!crtc_state->dc3co_exitline;
> -	dev_priv->psr.dc3co_exit_delay = intel_get_frame_time_us(crtc_state);
> +	/* DC5/DC6 required idle frames = 6 */
> +	val = usecs_to_jiffies(intel_get_frame_time_us(crtc_state) * 6);
> +	dev_priv->psr.dc3co_exit_delay = val;
>  	dev_priv->psr.transcoder = crtc_state->cpu_transcoder;
>  
>  	/*
> @@ -1277,8 +1279,6 @@ static void
>  tgl_dc3co_flush(struct drm_i915_private *dev_priv,
>  		unsigned int frontbuffer_bits, enum fb_op_origin origin)
>  {
> -	u32 delay;
> -
>  	mutex_lock(&dev_priv->psr.lock);
>  
>  	if (!dev_priv->psr.dc3co_enabled)
> @@ -1296,10 +1296,8 @@ tgl_dc3co_flush(struct drm_i915_private *dev_priv,
>  		goto unlock;
>  
>  	tgl_psr2_enable_dc3co(dev_priv);
> -	/* DC5/DC6 required idle frames = 6 */
> -	delay = 6 * dev_priv->psr.dc3co_exit_delay;
>  	mod_delayed_work(system_wq, &dev_priv->psr.idle_work,
> -			 usecs_to_jiffies(delay));
> +			 dev_priv->psr.dc3co_exit_delay);
>  
>  unlock:
>  	mutex_unlock(&dev_priv->psr.lock);
> -- 
> 2.25.0
>