[Mesa-dev] [PATCH 2/5] intel/isl: Add a supports_ccs_d helper

[Anuj Phogat]

On Wed, Feb 1, 2017 at 2:40 PM, Jason Ekstrand <jason at jlekstrand.net> wrote:
> Nothing uses this yet but it serves as a nice bit of documentation
> that's relatively easy to find.
> ---
>  src/intel/isl/isl.h        |  2 ++
>  src/intel/isl/isl_format.c | 15 +++++++++++++++
>  2 files changed, 17 insertions(+)
>
> diff --git a/src/intel/isl/isl.h b/src/intel/isl/isl.h
> index bdc5ebf..47e4a1e 100644
> --- a/src/intel/isl/isl.h
> +++ b/src/intel/isl/isl.h
> @@ -1040,6 +1040,8 @@ bool isl_format_supports_filtering(const struct gen_device_info *devinfo,
>                                     enum isl_format format);
>  bool isl_format_supports_vertex_fetch(const struct gen_device_info *devinfo,
>                                        enum isl_format format);
> +bool isl_format_supports_ccs_d(const struct gen_device_info *devinfo,
> +                               enum isl_format format);
>  bool isl_format_supports_ccs_e(const struct gen_device_info *devinfo,
>                                 enum isl_format format);
>  bool isl_format_supports_multisampling(const struct gen_device_info *devinfo,
> diff --git a/src/intel/isl/isl_format.c b/src/intel/isl/isl_format.c
> index ebc8ec9..2705595 100644
> --- a/src/intel/isl/isl_format.c
> +++ b/src/intel/isl/isl_format.c
> @@ -437,6 +437,21 @@ isl_format_supports_vertex_fetch(const struct gen_device_info *devinfo,
>     return format_gen(devinfo) >= format_info[format].input_vb;
>  }
>
> +/**
> + * Returns true if the given format can support single-sample fast clears.
> + */
> +bool
> +isl_format_supports_ccs_d(const struct gen_device_info *devinfo,
> +                          enum isl_format format)
> +{
> +   if (!isl_format_supports_rendering(devinfo, format))
> +      return false;
> +
Add a check for non-MSRT?

> +   const struct isl_format_layout *fmtl = isl_format_get_layout(format);
> +
> +   return fmtl->bpb == 32 || fmtl->bpb == 64 || fmtl->bpb == 128;
> +}
> +
>  bool
>  isl_format_supports_ccs_e(const struct gen_device_info *devinfo,
>                            enum isl_format format)
> --
> 2.5.0.400.gff86faf
>
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