Re: [PATCH 10/14] drm/i915: Populate possible_crtcs correctly

Dhinakaran Pandiyan
2018-06-22T01:26:04Z

On Fri, 2018-06-15 at 19:49 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> Don't advertize non-exisiting crtcs in the encoder possible_crtcs
> bitmask.
>
How do we end up advertising non-existing CRTCs? encoder->crtc_mask
seems to be populated in the encoder init functions based on possible
pipes. Do you mean pipe and crtc->index can potentially differ?

> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 17 ++++++++++++++++-
>  1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index b095899d68a9..3fa9da714403 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -13959,6 +13959,20 @@ static int intel_encoder_clones(struct
> intel_encoder *encoder)
>   return index_mask;
>  }
>
> +static int intel_encoder_crtcs(struct intel_encoder *encoder)
> +{
> + struct drm_device *dev = encoder->base.dev;
> + struct intel_crtc *crtc;
> + int index_mask = 0;
> +
> + for_each_intel_crtc(dev, crtc) {
> + if (encoder->crtc_mask & BIT(crtc->pipe))
> + index_mask |= drm_crtc_mask(&crtc->base);
> + }
> +
> + return index_mask;
> +}
> +
>  static bool has_edp_a(struct drm_i915_private *dev_priv)
>  {
>   if (!IS_MOBILE(dev_priv))
> @@ -14211,7 +14225,8 @@ static void intel_setup_outputs(struct
> drm_i915_private *dev_priv)
>   intel_psr_init(dev_priv);
>
>   for_each_intel_encoder(&dev_priv->drm, encoder) {
> - encoder->base.possible_crtcs = encoder->crtc_mask;
> + encoder->base.possible_crtcs =
> + intel_encoder_crtcs(encoder);
>   encoder->base.possible_clones =
>   intel_encoder_clones(encoder);
>   }