On Wed, Jan 08, 2025 at 11:09:00AM +0530, Arun R Murthy wrote:
> Expose drm plane function to create formats/modifiers blob. This
> function can be used to expose list of supported formats/modifiers for
> sync/async flips.
>
> Signed-off-by: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_plane.c | 44 +++++++++++++++++++++++++++++---------------
> include/drm/drm_plane.h | 4 ++++
> 2 files changed, 33 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> index 416818e54ccffcf3d3aada2723e96ce8ccf1dd97..4f35eec2b7770fcc90c3e07a9068b31c0563a4c0 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -191,7 +191,10 @@ modifiers_ptr(struct drm_format_modifier_blob *blob)
> return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
> }
>
> -static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane)
> +int drm_plane_create_format_blob(struct drm_device *dev,
> + struct drm_plane *plane, u64 *modifiers,
> + unsigned int modifier_count, u32 *formats,
> + unsigned int format_count, bool is_async)
> {
> const struct drm_mode_config *config = &dev->mode_config;
> struct drm_property_blob *blob;
> @@ -200,14 +203,14 @@ static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane
> struct drm_format_modifier_blob *blob_data;
> unsigned int i, j;
>
> - formats_size = sizeof(__u32) * plane->format_count;
> + formats_size = sizeof(__u32) * format_count;
> if (WARN_ON(!formats_size)) {
> /* 0 formats are never expected */
> return 0;
> }
>
> modifiers_size =
> - sizeof(struct drm_format_modifier) * plane->modifier_count;
> + sizeof(struct drm_format_modifier) * modifier_count;
>
> blob_size = sizeof(struct drm_format_modifier_blob);
> /* Modifiers offset is a pointer to a struct with a 64 bit field so it
> @@ -223,37 +226,45 @@ static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane
>
> blob_data = blob->data;
> blob_data->version = FORMAT_BLOB_CURRENT;
> - blob_data->count_formats = plane->format_count;
> + blob_data->count_formats = format_count;
> blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
> - blob_data->count_modifiers = plane->modifier_count;
> + blob_data->count_modifiers = modifier_count;
>
> blob_data->modifiers_offset =
> ALIGN(blob_data->formats_offset + formats_size, 8);
>
> - memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
> + memcpy(formats_ptr(blob_data), formats, formats_size);
>
> mod = modifiers_ptr(blob_data);
> - for (i = 0; i < plane->modifier_count; i++) {
> - for (j = 0; j < plane->format_count; j++) {
> - if (!plane->funcs->format_mod_supported ||
> + for (i = 0; i < modifier_count; i++) {
> + for (j = 0; j < format_count; j++) {
> + if (is_async ||
> + !plane->funcs->format_mod_supported ||
> plane->funcs->format_mod_supported(plane,
> - plane->format_types[j],
> - plane->modifiers[i])) {
> + formats[j],
> + modifiers[i])) {
> mod->formats |= 1ULL << j;
> }
> }
>
> - mod->modifier = plane->modifiers[i];
> + mod->modifier = modifiers[i];
> mod->offset = 0;
> mod->pad = 0;
> mod++;
> }
>
> - drm_object_attach_property(&plane->base, config->modifiers_property,
> - blob->base.id);
> + if (is_async)
> + drm_object_attach_property(&plane->base,
> + config->async_modifiers_property,
> + blob->base.id);
> + else
> + drm_object_attach_property(&plane->base,
> + config->modifiers_property,
> + blob->base.id);
IMO the function should only create the blob. Leave it to the caller to
attach it.
The 'is_async' parameter could also be replaced with with a function
pointer to the appropriate format_mod_supported() function. That
makes the implementation entirely generic.
>
> return 0;
> }
> +EXPORT_SYMBOL(drm_plane_create_format_blob);
>
> /**
> * DOC: hotspot properties
> @@ -476,7 +487,10 @@ static int __drm_universal_plane_init(struct drm_device *dev,
> }
>
> if (format_modifier_count)
> - create_in_format_blob(dev, plane);
> + drm_plane_create_format_blob(dev, plane, plane->modifiers,
> + format_modifier_count,
> + plane->format_types, format_count,
> + false);
>
> return 0;
> }
> diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
> index e8749e6fc3bc0acfc73bbd8401f85c3126e86759..eb84830fbb723e39436bfbadf369894a5657cd45 100644
> --- a/include/drm/drm_plane.h
> +++ b/include/drm/drm_plane.h
> @@ -1008,5 +1008,9 @@ int drm_plane_create_scaling_filter_property(struct drm_plane *plane,
> int drm_plane_add_size_hints_property(struct drm_plane *plane,
> const struct drm_plane_size_hint *hints,
> int num_hints);
> +int drm_plane_create_format_blob(struct drm_device *dev,
> + struct drm_plane *plane, u64 *modifiers,
> + unsigned int modifier_count, u32 *formats,
> + unsigned int format_count, bool is_async);
I don't think this needs to be exposed to anyone.
__drm_universal_plane_init() should just populate both
the normal blob, and and the async blob (iff
.format_mod_supported_async() is provided).
>
> #endif
>
> --
> 2.25.1
--
Ville Syrjälä
Intel
