On Mon, Feb 23, 2015 at 03:56:01PM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <[email protected]>
> 
> By this patch all underlying bits have been implemented and this
> patch actually enables the feature.
> 
> Signed-off-by: Tvrtko Ursulin <[email protected]>
> ---

Ville noticed that it didn't seem we were properly returning -EINVAL
when userspace sets reserved bits in the modifiers field. Otherwise,
what's here seems to progress in the right direction:

Reviewed-by: Damien Lespiau <[email protected]>

-- 
Damien

>  drivers/gpu/drm/i915/intel_display.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c 
> b/drivers/gpu/drm/i915/intel_display.c
> index 74d4923..f100086 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -12781,6 +12781,14 @@ static int intel_framebuffer_init(struct drm_device 
> *dev,
>                       DRM_DEBUG("tiling_mode doesn't match fb modifier\n");
>                       return -EINVAL;
>               }
> +
> +             if (INTEL_INFO(dev)->gen < 9 &&
> +                 (mode_cmd->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
> +                  mode_cmd->modifier[0] == I915_FORMAT_MOD_Yf_TILED)) {
> +                     DRM_DEBUG("Unsupported tiling 0x%llx!\n",
> +                               mode_cmd->modifier[0]);
> +                     return -EINVAL;
> +             }
>       } else {
>               if (obj->tiling_mode == I915_TILING_X)
>                       mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED;
> @@ -12790,11 +12798,6 @@ static int intel_framebuffer_init(struct drm_device 
> *dev,
>               }
>       }
>  
> -     if (mode_cmd->modifier[0] == I915_FORMAT_MOD_Y_TILED) {
> -             DRM_DEBUG("hardware does not support tiling Y\n");
> -             return -EINVAL;
> -     }
> -
>       stride_alignment = intel_fb_stride_alignment(dev, mode_cmd->modifier[0],
>                                                    mode_cmd->pixel_format);
>       if (mode_cmd->pitches[0] & (stride_alignment - 1)) {
> -- 
> 2.3.0
> 
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