[Intel-gfx] [PATCH 3/9] drm/i915: use the mode->htotal to calculate linetime watermarks

[Ville Syrjälä]

On Fri, May 03, 2013 at 05:23:39PM -0300, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> ... instead of mode->crtc_display. The spec says "pipe horizontal
> total number of pixels" and the "Haswell Watermark Calculator" tool
> uses the "Pipe H Total" instead of "Pipe H Src" as the value.
> 
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  drivers/gpu/drm/i915/intel_pm.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index d056bc9..4cc5f99 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -2035,7 +2035,7 @@ haswell_update_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
>  	 * row at the given clock rate, multiplied by 8.
>  	 * */
>  	temp |= PIPE_WM_LINETIME_TIME(
> -		((mode->crtc_hdisplay * 1000) / mode->clock) * 8);
> +		((mode->htotal * 1000) / mode->clock) * 8);
>  
>  	/* IPS watermarks are only used by pipe A, and are ignored by
>  	 * pipes B and C.  They are calculated similarly to the common
> -- 
> 1.7.10.4
> 
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-- 
Ville Syrjälä
Intel OTC