[Intel-gfx] [PATCH 5/7] drm/i915: Get right max plane stride

[Ville Syrjälä]

On Tue, Feb 04, 2020 at 04:59:25PM +0530, Anshuman Gupta wrote:
> intel_plane_fb_max_stride should return the max stride of
> primary plane for first available pipe in intel device info
> pipe_mask.
> 
> changes since RFC:
> - Introduced a helper to get first intel_crtc intel_get_first_crtc. [Ville]
> 
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>

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

> ---
>  drivers/gpu/drm/i915/display/intel_display.c       | 5 +++--
>  drivers/gpu/drm/i915/display/intel_display_types.h | 6 ++++++
>  2 files changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 7c51eb3faeb3..0dcf400f6954 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -2706,9 +2706,10 @@ u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
>  
>  	/*
>  	 * We assume the primary plane for pipe A has
> -	 * the highest stride limits of them all.
> +	 * the highest stride limits of them all,
> +	 * if in case pipe A is disabled, use the first pipe from pipe_mask.
>  	 */
> -	crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
> +	crtc = intel_get_first_crtc(dev_priv);
>  	if (!crtc)
>  		return 0;
>  
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 80a6460da852..1f295c89061a 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1423,6 +1423,12 @@ vlv_pipe_to_channel(enum pipe pipe)
>  	}
>  }
>  
> +static inline struct intel_crtc *
> +intel_get_first_crtc(struct drm_i915_private *dev_priv)
> +{
> +	return to_intel_crtc(drm_crtc_from_index(&dev_priv->drm, 0));
> +}
> +
>  static inline struct intel_crtc *
>  intel_get_crtc_for_pipe(struct drm_i915_private *dev_priv, enum pipe pipe)
>  {
> -- 
> 2.24.0

-- 
Ville Syrjälä
Intel