[Intel-gfx] [PATCH v2 06/13] drm/i915: Remove some useless zeroing on skl+ wm calculations

[Matt Roper]

On Wed, Nov 14, 2018 at 11:07:22PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> We memset(0) the entire watermark struct the start, so there's no
> need to clear things later on.
> 
> v2: Rebase due to some stale w/a removal
> 
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Matt Roper <matthew.d.roper at intel.com>

> ---
>  drivers/gpu/drm/i915/intel_pm.c | 16 ++++------------
>  1 file changed, 4 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 25f589c4f68c..eb3ce3ee4df3 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -4707,10 +4707,8 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
>  	if (latency == 0)
>  		return level == 0 ? -EINVAL : 0;
>  
> -	if (!intel_wm_plane_visible(cstate, intel_pstate)) {
> -		result->plane_en = false;
> +	if (!intel_wm_plane_visible(cstate, intel_pstate))
>  		return 0;
> -	}
>  
>  	/* Display WA #1141: kbl,cfl */
>  	if ((IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
> @@ -4807,8 +4805,6 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
>  	if ((level > 0 && res_lines > 31) ||
>  	    res_blocks >= ddb_allocation ||
>  	    min_disp_buf_needed >= ddb_allocation) {
> -		result->plane_en = false;
> -
>  		/*
>  		 * If there are no valid level 0 watermarks, then we can't
>  		 * support this display configuration.
> @@ -4910,15 +4906,15 @@ static void skl_compute_transition_wm(const struct intel_crtc_state *cstate,
>  	uint16_t wm0_sel_res_b, trans_offset_b, res_blocks;
>  
>  	if (!cstate->base.active)
> -		goto exit;
> +		return;
>  
>  	/* Transition WM are not recommended by HW team for GEN9 */
>  	if (INTEL_GEN(dev_priv) <= 9)
> -		goto exit;
> +		return;
>  
>  	/* Transition WM don't make any sense if ipc is disabled */
>  	if (!dev_priv->ipc_enabled)
> -		goto exit;
> +		return;
>  
>  	trans_min = 14;
>  	if (INTEL_GEN(dev_priv) >= 11)
> @@ -4957,11 +4953,7 @@ static void skl_compute_transition_wm(const struct intel_crtc_state *cstate,
>  	if (res_blocks < ddb_allocation) {
>  		trans_wm->plane_res_b = res_blocks;
>  		trans_wm->plane_en = true;
> -		return;
>  	}
> -
> -exit:
> -	trans_wm->plane_en = false;
>  }
>  
>  static int __skl_build_plane_wm_single(struct skl_ddb_allocation *ddb,
> -- 
> 2.18.1
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795