Hi Ben,
A couple of small questions/suggestions that I hope you find useful.
Please don't block any of this work based on my comments.
On 16 May 2017 at 22:31, Ben Widawsky <ben@xxxxxxxxxxxx> wrote:
> +static bool intel_primary_plane_format_mod_supported(struct drm_plane *plane,
> + uint32_t format,
> + uint64_t modifier)
> +{
> + struct drm_i915_private *dev_priv = to_i915(plane->dev);
> +
> + if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
> + return false;
> +
> + if (INTEL_GEN(dev_priv) >= 9)
> + return skl_mod_supported(format, modifier);
> + else if (INTEL_GEN(dev_priv) >= 4)
> + return i965_mod_supported(format, modifier);
> + else
> + return i8xx_mod_supported(format, modifier);
> +
Nit: if you rewrite this as below, the control flow should be clearer.
Thus the 'return false;' at the end, will be [more] obvious that it's
unreachable ;-)
if (INTEL_GEN(dev_priv) >= 9)
return skl_mod_supported(format, modifier);
if (INTEL_GEN(dev_priv) >= 4)
return i965_mod_supported(format, modifier);
return i8xx_mod_supported(format, modifier);
> + return false;
> +}
> +
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> +static bool intel_sprite_plane_format_mod_supported(struct drm_plane *plane,
> + uint32_t format,
> + uint64_t modifier)
> +{
> + struct drm_i915_private *dev_priv = to_i915(plane->dev);
> +
> + if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
> + return false;
> +
> + BUG_ON(plane->base.type != DRM_PLANE_TYPE_OVERLAY);
> +
> + switch (format) {
> + case DRM_FORMAT_XBGR2101010:
> + case DRM_FORMAT_ABGR2101010:
> + if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> + return true;
> + break;
> + case DRM_FORMAT_RGB565:
> + case DRM_FORMAT_ABGR8888:
> + case DRM_FORMAT_ARGB8888:
> + if (INTEL_GEN(dev_priv) >= 9 || IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> + return true;
> + break;
> + case DRM_FORMAT_XBGR8888:
> + if (INTEL_GEN(dev_priv) >= 6)
> + return true;
> + break;
> + case DRM_FORMAT_XRGB8888:
> + case DRM_FORMAT_YUYV:
> + case DRM_FORMAT_YVYU:
> + case DRM_FORMAT_UYVY:
> + case DRM_FORMAT_VYUY:
> + return true;
> + }
> +
> + return false;
> +}
> +
> +const struct drm_plane_funcs intel_sprite_plane_funcs = {
> + .update_plane = drm_atomic_helper_update_plane,
> + .disable_plane = drm_atomic_helper_disable_plane,
> + .destroy = intel_plane_destroy,
> + .set_property = drm_atomic_helper_plane_set_property,
> + .atomic_get_property = intel_plane_atomic_get_property,
> + .atomic_set_property = intel_plane_atomic_set_property,
> + .atomic_duplicate_state = intel_plane_duplicate_state,
> + .atomic_destroy_state = intel_plane_destroy_state,
> + .format_mod_supported = intel_sprite_plane_format_mod_supported,
> +};
> +
Having a dull moment - is intel_sprite_plane_funcs (+
intel_sprite_plane_format_mod_supported) unused or I'm seeing things?
If one is to keep it, for future work, perhaps it's worth adding a 2-3
word comment,
Regards,
Emil
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