[PATCH libdrm] modetest: Decode IN_FORMATS plane blob property

[Kristian Høgsberg]

On Thu, Sep 28, 2017 at 4:44 PM, Kristian H. Kristensen
<hoegsberg at gmail.com> wrote:
> This teaches modetest about the new IN_FORMATS blob and decodes the
> blob to show supported formats and modifiers.
>
> Signed-off-by: Kristian H. Kristensen <hoegsberg at chromium.org>

I went ahead and pushed this.

Kristian

> ---
>  tests/modetest/modetest.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 86 insertions(+)
>
> diff --git a/tests/modetest/modetest.c b/tests/modetest/modetest.c
> index b8891ff5..8ad4766f 100644
> --- a/tests/modetest/modetest.c
> +++ b/tests/modetest/modetest.c
> @@ -251,6 +251,89 @@ static void dump_blob(struct device *dev, uint32_t blob_id)
>         drmModeFreePropertyBlob(blob);
>  }
>
> +static const char *modifier_to_string(uint64_t modifier)
> +{
> +       switch (modifier) {
> +       case DRM_FORMAT_MOD_INVALID:
> +               return "INVALID";
> +       case DRM_FORMAT_MOD_LINEAR:
> +               return "LINEAR";
> +       case I915_FORMAT_MOD_X_TILED:
> +               return "X_TILED";
> +       case I915_FORMAT_MOD_Y_TILED:
> +               return "Y_TILED";
> +       case I915_FORMAT_MOD_Yf_TILED:
> +               return "Yf_TILED";
> +       case I915_FORMAT_MOD_Y_TILED_CCS:
> +               return "Y_TILED_CCS";
> +       case I915_FORMAT_MOD_Yf_TILED_CCS:
> +               return "Yf_TILED_CCS";
> +       case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
> +               return "SAMSUNG_64_32_TILE";
> +       case DRM_FORMAT_MOD_VIVANTE_TILED:
> +               return "VIVANTE_TILED";
> +       case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
> +               return "VIVANTE_SUPER_TILED";
> +       case DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED:
> +               return "VIVANTE_SPLIT_TILED";
> +       case DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED:
> +               return "VIVANTE_SPLIT_SUPER_TILED";
> +       case NV_FORMAT_MOD_TEGRA_TILED:
> +               return "MOD_TEGRA_TILED";
> +       case NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(0):
> +               return "MOD_TEGRA_16BX2_BLOCK(0)";
> +       case NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(1):
> +               return "MOD_TEGRA_16BX2_BLOCK(1)";
> +       case NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(2):
> +               return "MOD_TEGRA_16BX2_BLOCK(2)";
> +       case NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(3):
> +               return "MOD_TEGRA_16BX2_BLOCK(3)";
> +       case NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(4):
> +               return "MOD_TEGRA_16BX2_BLOCK(4)";
> +       case NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(5):
> +               return "MOD_TEGRA_16BX2_BLOCK(5)";
> +       case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
> +               return "MOD_BROADCOM_VC4_T_TILED";
> +       default:
> +               return "(UNKNOWN MODIFIER)";
> +       }
> +}
> +
> +static void dump_in_formats(struct device *dev, uint32_t blob_id)
> +{
> +       uint32_t i, j;
> +       drmModePropertyBlobPtr blob;
> +       struct drm_format_modifier_blob *header;
> +       uint32_t *formats;
> +       struct drm_format_modifier *modifiers;
> +
> +       printf("\t\tin_formats blob decoded:\n");
> +       blob = drmModeGetPropertyBlob(dev->fd, blob_id);
> +       if (!blob) {
> +               printf("\n");
> +               return;
> +       }
> +
> +       header = blob->data;
> +       formats = (uint32_t *) ((char *) header + header->formats_offset);
> +       modifiers = (struct drm_format_modifier *)
> +               ((char *) header + header->modifiers_offset);
> +
> +       for (i = 0; i < header->count_formats; i++) {
> +               printf("\t\t\t");
> +               dump_fourcc(formats[i]);
> +               printf(": ");
> +               for (j = 0; j < header->count_modifiers; j++) {
> +                       uint64_t mask = 1ULL << i;
> +                       if (modifiers[j].formats & mask)
> +                               printf(" %s", modifier_to_string(modifiers[j].modifier));
> +               }
> +               printf("\n");
> +       }
> +
> +       drmModeFreePropertyBlob(blob);
> +}
> +
>  static void dump_prop(struct device *dev, drmModePropertyPtr prop,
>                       uint32_t prop_id, uint64_t value)
>  {
> @@ -328,6 +411,9 @@ static void dump_prop(struct device *dev, drmModePropertyPtr prop,
>                 printf(" %"PRId64"\n", value);
>         else
>                 printf(" %"PRIu64"\n", value);
> +
> +       if (strcmp(prop->name, "IN_FORMATS") == 0)
> +               dump_in_formats(dev, value);
>  }
>
>  static void dump_connectors(struct device *dev)
> --
> 2.14.2.822.g60be5d43e6-goog
>