| Message ID | 20241105102608.3912133-2-arun.r.murthy@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Expose modifiers/formats supported by async flips | expand |
On Tue, Nov 05, 2024 at 03:56:05PM +0530, Arun R Murthy wrote: > There exists a property IN_FORMATS which exposes the plane supported > modifiers/formats to the user. In some platforms when asynchronous flips > are used all of modifiers/formats mentioned in IN_FORMATS are not > supported. This patch adds a new plane property IN_FORMATS_ASYNC to > expose the async flips supported modifiers/formats so that user can use > this information ahead and done flips with unsupported > formats/modifiers. This will save flips failures. > > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com> > --- > drivers/gpu/drm/drm_mode_config.c | 7 +++ > drivers/gpu/drm/drm_plane.c | 73 +++++++++++++++++++++++++++++++ > include/drm/drm_mode_config.h | 6 +++ > include/drm/drm_plane.h | 10 +++++ > 4 files changed, 96 insertions(+) > > diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c > index 37d2e0a4ef4b..cff189a2e751 100644 > --- a/drivers/gpu/drm/drm_mode_config.c > +++ b/drivers/gpu/drm/drm_mode_config.c > @@ -379,6 +379,13 @@ static int drm_mode_create_standard_properties(struct drm_device *dev) > return -ENOMEM; > dev->mode_config.size_hints_property = prop; > > + prop = drm_property_create(dev, > + DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, > + "IN_FORMATS_ASYNC", 0); > + if (!prop) > + return -ENOMEM; > + dev->mode_config.async_modifiers_property = prop; > + > return 0; > } > > diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c > index a28b22fdd7a4..01b8e6932fda 100644 > --- a/drivers/gpu/drm/drm_plane.c > +++ b/drivers/gpu/drm/drm_plane.c > @@ -141,6 +141,12 @@ > * various bugs in this area with inconsistencies between the capability > * flag and per-plane properties. > * > + * IN_FORMATS_ASYNC: > + * Blob property which contains the set of buffer format and modifier > + * pairs supported by this plane for asynchronous flips. The blob is a struct > + * drm_format_modifier_blob. Without this property the plane doesn't > + * support buffers with modifiers. Userspace cannot change this property. > + * > * SIZE_HINTS: > * Blob property which contains the set of recommended plane size > * which can used for simple "cursor like" use cases (eg. no scaling). > @@ -249,6 +255,70 @@ static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane > return 0; > } > > +static int create_in_format_async_blob(struct drm_device *dev, struct drm_plane *plane) > +{ > + const struct drm_mode_config *config = &dev->mode_config; > + struct drm_property_blob *blob; > + struct drm_format_modifier *async_mod; > + size_t blob_size, async_formats_size, async_modifiers_size; > + struct drm_format_modifier_blob *blob_data; > + unsigned int i, j; > + > + async_formats_size = sizeof(__u32) * plane->async_format_count; > + if (WARN_ON(!async_formats_size)) { > + /* 0 formats are never expected */ > + return 0; > + } > + > + async_modifiers_size = > + sizeof(struct drm_format_modifier) * plane->async_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 > + * should be naturally aligned to 8B. > + */ > + BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8); > + blob_size += ALIGN(async_formats_size, 8); > + blob_size += async_modifiers_size; > + > + blob = drm_property_create_blob(dev, blob_size, NULL); > + if (IS_ERR(blob)) > + return -1; > + > + blob_data = blob->data; > + blob_data->version = FORMAT_BLOB_CURRENT; > + blob_data->count_formats = plane->async_format_count; > + blob_data->formats_offset = sizeof(struct drm_format_modifier_blob); > + blob_data->count_modifiers = plane->async_modifier_count; > + > + blob_data->modifiers_offset = > + ALIGN(blob_data->formats_offset + async_formats_size, 8); > + > + memcpy(formats_ptr(blob_data), plane->async_format_types, async_formats_size); > + > + async_mod = modifiers_ptr(blob_data); > + for (i = 0; i < plane->async_modifier_count; i++) { > + for (j = 0; j < plane->async_format_count; j++) { > + if (!plane->funcs->format_mod_supported || > + plane->funcs->format_mod_supported(plane, > + plane->async_format_types[j], > + plane->async_modifiers[i])) { > + async_mod->formats |= 1ULL << j; > + } > + } > + > + async_mod->modifier = plane->async_modifiers[i]; > + async_mod->offset = 0; > + async_mod->pad = 0; > + async_mod++; > + } > + > + drm_object_attach_property(&plane->base, config->async_modifiers_property, > + blob->base.id); > + > + return 0; > +} That is a verbatim copy of the existing code. Please refactor the current code so that it can be reused. > + > /** > * DOC: hotspot properties > * > @@ -472,6 +542,9 @@ static int __drm_universal_plane_init(struct drm_device *dev, > if (format_modifier_count) > create_in_format_blob(dev, plane); > > + if (plane->async_modifier_count) > + create_in_format_async_blob(dev, plane); > + > return 0; > } > > diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h > index 271765e2e9f2..0c116d6dfd27 100644 > --- a/include/drm/drm_mode_config.h > +++ b/include/drm/drm_mode_config.h > @@ -936,6 +936,12 @@ struct drm_mode_config { > */ > struct drm_property *modifiers_property; > > + /** > + * @async_modifiers_property: Plane property to list support modifier/format > + * combination for asynchronous flips. > + */ > + struct drm_property *async_modifiers_property; > + > /** > * @size_hints_property: Plane SIZE_HINTS property. > */ > diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h > index dd718c62ac31..d9571265251a 100644 > --- a/include/drm/drm_plane.h > +++ b/include/drm/drm_plane.h > @@ -658,11 +658,21 @@ struct drm_plane { > */ > bool format_default; > > + /** @format_types: array of formats supported by this plane */ > + uint32_t *async_format_types; > + /** @format_count: Size of the array pointed at by @format_types. */ > + unsigned int async_format_count; > + > /** @modifiers: array of modifiers supported by this plane */ > uint64_t *modifiers; > /** @modifier_count: Size of the array pointed at by @modifier_count. */ > unsigned int modifier_count; > > + /** @modifiers: array of modifiers supported by this plane */ > + uint64_t *async_modifiers; > + /** @modifier_count: Size of the array pointed at by @modifier_count. */ > + unsigned int async_modifier_count; I'm not sure adding any of this is really useful. I think we could just add a new .format_mod_supported_async() hook instead (which could be implemented in terms of the current thing + something like https://patchwork.freedesktop.org/patch/619047/?series=139807&rev=3 That would also be more flexible since it can allow specific format+modifier combinations to be either accepted or rejected. > + > /** > * @crtc: > * > -- > 2.25.1
> -----Original Message----- > From: Ville Syrjälä <ville.syrjala@linux.intel.com> > Sent: Wednesday, November 6, 2024 7:31 PM > To: Murthy, Arun R <arun.r.murthy@intel.com> > Cc: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri- > devel@lists.freedesktop.org > Subject: Re: [PATCH 1/4] drm/plane: Add new plane property > IN_FORMATS_ASYNC > > On Tue, Nov 05, 2024 at 03:56:05PM +0530, Arun R Murthy wrote: > > There exists a property IN_FORMATS which exposes the plane supported > > modifiers/formats to the user. In some platforms when asynchronous > > flips are used all of modifiers/formats mentioned in IN_FORMATS are > > not supported. This patch adds a new plane property IN_FORMATS_ASYNC > > to expose the async flips supported modifiers/formats so that user can > > use this information ahead and done flips with unsupported > > formats/modifiers. This will save flips failures. > > > > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com> > > --- > > drivers/gpu/drm/drm_mode_config.c | 7 +++ > > drivers/gpu/drm/drm_plane.c | 73 > +++++++++++++++++++++++++++++++ > > include/drm/drm_mode_config.h | 6 +++ > > include/drm/drm_plane.h | 10 +++++ > > 4 files changed, 96 insertions(+) > > > > diff --git a/drivers/gpu/drm/drm_mode_config.c > > b/drivers/gpu/drm/drm_mode_config.c > > index 37d2e0a4ef4b..cff189a2e751 100644 > > --- a/drivers/gpu/drm/drm_mode_config.c > > +++ b/drivers/gpu/drm/drm_mode_config.c > > @@ -379,6 +379,13 @@ static int > drm_mode_create_standard_properties(struct drm_device *dev) > > return -ENOMEM; > > dev->mode_config.size_hints_property = prop; > > > > + prop = drm_property_create(dev, > > + DRM_MODE_PROP_IMMUTABLE | > DRM_MODE_PROP_BLOB, > > + "IN_FORMATS_ASYNC", 0); > > + if (!prop) > > + return -ENOMEM; > > + dev->mode_config.async_modifiers_property = prop; > > + > > return 0; > > } > > > > diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c > > index a28b22fdd7a4..01b8e6932fda 100644 > > --- a/drivers/gpu/drm/drm_plane.c > > +++ b/drivers/gpu/drm/drm_plane.c > > @@ -141,6 +141,12 @@ > > * various bugs in this area with inconsistencies between the capability > > * flag and per-plane properties. > > * > > + * IN_FORMATS_ASYNC: > > + * Blob property which contains the set of buffer format and modifier > > + * pairs supported by this plane for asynchronous flips. The blob is a struct > > + * drm_format_modifier_blob. Without this property the plane doesn't > > + * support buffers with modifiers. Userspace cannot change this property. > > + * > > * SIZE_HINTS: > > * Blob property which contains the set of recommended plane size > > * which can used for simple "cursor like" use cases (eg. no scaling). > > @@ -249,6 +255,70 @@ static int create_in_format_blob(struct drm_device > *dev, struct drm_plane *plane > > return 0; > > } > > > > +static int create_in_format_async_blob(struct drm_device *dev, struct > > +drm_plane *plane) { > > + const struct drm_mode_config *config = &dev->mode_config; > > + struct drm_property_blob *blob; > > + struct drm_format_modifier *async_mod; > > + size_t blob_size, async_formats_size, async_modifiers_size; > > + struct drm_format_modifier_blob *blob_data; > > + unsigned int i, j; > > + > > + async_formats_size = sizeof(__u32) * plane->async_format_count; > > + if (WARN_ON(!async_formats_size)) { > > + /* 0 formats are never expected */ > > + return 0; > > + } > > + > > + async_modifiers_size = > > + sizeof(struct drm_format_modifier) * plane- > >async_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 > > + * should be naturally aligned to 8B. > > + */ > > + BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8); > > + blob_size += ALIGN(async_formats_size, 8); > > + blob_size += async_modifiers_size; > > + > > + blob = drm_property_create_blob(dev, blob_size, NULL); > > + if (IS_ERR(blob)) > > + return -1; > > + > > + blob_data = blob->data; > > + blob_data->version = FORMAT_BLOB_CURRENT; > > + blob_data->count_formats = plane->async_format_count; > > + blob_data->formats_offset = sizeof(struct drm_format_modifier_blob); > > + blob_data->count_modifiers = plane->async_modifier_count; > > + > > + blob_data->modifiers_offset = > > + ALIGN(blob_data->formats_offset + async_formats_size, 8); > > + > > + memcpy(formats_ptr(blob_data), plane->async_format_types, > > +async_formats_size); > > + > > + async_mod = modifiers_ptr(blob_data); > > + for (i = 0; i < plane->async_modifier_count; i++) { > > + for (j = 0; j < plane->async_format_count; j++) { > > + if (!plane->funcs->format_mod_supported || > > + plane->funcs->format_mod_supported(plane, > > + plane- > >async_format_types[j], > > + plane- > >async_modifiers[i])) { > > + async_mod->formats |= 1ULL << j; > > + } > > + } > > + > > + async_mod->modifier = plane->async_modifiers[i]; > > + async_mod->offset = 0; > > + async_mod->pad = 0; > > + async_mod++; > > + } > > + > > + drm_object_attach_property(&plane->base, config- > >async_modifiers_property, > > + blob->base.id); > > + > > + return 0; > > +} > > That is a verbatim copy of the existing code. Please refactor the current code so > that it can be reused. > Ok will look into it in the next revision. > > + > > /** > > * DOC: hotspot properties > > * > > @@ -472,6 +542,9 @@ static int __drm_universal_plane_init(struct > drm_device *dev, > > if (format_modifier_count) > > create_in_format_blob(dev, plane); > > > > + if (plane->async_modifier_count) > > + create_in_format_async_blob(dev, plane); > > + > > return 0; > > } > > > > diff --git a/include/drm/drm_mode_config.h > > b/include/drm/drm_mode_config.h index 271765e2e9f2..0c116d6dfd27 > > 100644 > > --- a/include/drm/drm_mode_config.h > > +++ b/include/drm/drm_mode_config.h > > @@ -936,6 +936,12 @@ struct drm_mode_config { > > */ > > struct drm_property *modifiers_property; > > > > + /** > > + * @async_modifiers_property: Plane property to list support > modifier/format > > + * combination for asynchronous flips. > > + */ > > + struct drm_property *async_modifiers_property; > > + > > /** > > * @size_hints_property: Plane SIZE_HINTS property. > > */ > > diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index > > dd718c62ac31..d9571265251a 100644 > > --- a/include/drm/drm_plane.h > > +++ b/include/drm/drm_plane.h > > @@ -658,11 +658,21 @@ struct drm_plane { > > */ > > bool format_default; > > > > + /** @format_types: array of formats supported by this plane */ > > + uint32_t *async_format_types; > > + /** @format_count: Size of the array pointed at by @format_types. */ > > + unsigned int async_format_count; > > + > > /** @modifiers: array of modifiers supported by this plane */ > > uint64_t *modifiers; > > /** @modifier_count: Size of the array pointed at by @modifier_count. > */ > > unsigned int modifier_count; > > > > + /** @modifiers: array of modifiers supported by this plane */ > > + uint64_t *async_modifiers; > > + /** @modifier_count: Size of the array pointed at by @modifier_count. > */ > > + unsigned int async_modifier_count; > > I'm not sure adding any of this is really useful. I think we could just add a new > .format_mod_supported_async() hook instead (which could be implemented in > terms of the current thing + something like > https://patchwork.freedesktop.org/patch/619047/?series=139807&rev=3 > > That would also be more flexible since it can allow specific > format+modifier combinations to be either accepted or rejected. > This would not serve the purpose. The purpose here is to expose the supported list to the user so that user can have this ahead and check for the modifier/format before sending the flip. This would avoid async flip failures due to unsupported modifier/format. This approach has been acknowledged from the userspace which can be located @ https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4063 Thanks and Regards, Arun R Murthy ------------------- > > + > > /** > > * @crtc: > > * > > -- > > 2.25.1 > > -- > Ville Syrjälä > Intel
On Wed, Nov 06, 2024 at 02:32:28PM +0000, Murthy, Arun R wrote: > > -----Original Message----- > > From: Ville Syrjälä <ville.syrjala@linux.intel.com> > > Sent: Wednesday, November 6, 2024 7:31 PM > > To: Murthy, Arun R <arun.r.murthy@intel.com> > > Cc: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri- > > devel@lists.freedesktop.org > > Subject: Re: [PATCH 1/4] drm/plane: Add new plane property > > IN_FORMATS_ASYNC > > > > On Tue, Nov 05, 2024 at 03:56:05PM +0530, Arun R Murthy wrote: > > > There exists a property IN_FORMATS which exposes the plane supported > > > modifiers/formats to the user. In some platforms when asynchronous > > > flips are used all of modifiers/formats mentioned in IN_FORMATS are > > > not supported. This patch adds a new plane property IN_FORMATS_ASYNC > > > to expose the async flips supported modifiers/formats so that user can > > > use this information ahead and done flips with unsupported > > > formats/modifiers. This will save flips failures. > > > > > > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com> > > > --- > > > drivers/gpu/drm/drm_mode_config.c | 7 +++ > > > drivers/gpu/drm/drm_plane.c | 73 > > +++++++++++++++++++++++++++++++ > > > include/drm/drm_mode_config.h | 6 +++ > > > include/drm/drm_plane.h | 10 +++++ > > > 4 files changed, 96 insertions(+) > > > > > > diff --git a/drivers/gpu/drm/drm_mode_config.c > > > b/drivers/gpu/drm/drm_mode_config.c > > > index 37d2e0a4ef4b..cff189a2e751 100644 > > > --- a/drivers/gpu/drm/drm_mode_config.c > > > +++ b/drivers/gpu/drm/drm_mode_config.c > > > @@ -379,6 +379,13 @@ static int > > drm_mode_create_standard_properties(struct drm_device *dev) > > > return -ENOMEM; > > > dev->mode_config.size_hints_property = prop; > > > > > > + prop = drm_property_create(dev, > > > + DRM_MODE_PROP_IMMUTABLE | > > DRM_MODE_PROP_BLOB, > > > + "IN_FORMATS_ASYNC", 0); > > > + if (!prop) > > > + return -ENOMEM; > > > + dev->mode_config.async_modifiers_property = prop; > > > + > > > return 0; > > > } > > > > > > diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c > > > index a28b22fdd7a4..01b8e6932fda 100644 > > > --- a/drivers/gpu/drm/drm_plane.c > > > +++ b/drivers/gpu/drm/drm_plane.c > > > @@ -141,6 +141,12 @@ > > > * various bugs in this area with inconsistencies between the capability > > > * flag and per-plane properties. > > > * > > > + * IN_FORMATS_ASYNC: > > > + * Blob property which contains the set of buffer format and modifier > > > + * pairs supported by this plane for asynchronous flips. The blob is a struct > > > + * drm_format_modifier_blob. Without this property the plane doesn't > > > + * support buffers with modifiers. Userspace cannot change this property. > > > + * > > > * SIZE_HINTS: > > > * Blob property which contains the set of recommended plane size > > > * which can used for simple "cursor like" use cases (eg. no scaling). > > > @@ -249,6 +255,70 @@ static int create_in_format_blob(struct drm_device > > *dev, struct drm_plane *plane > > > return 0; > > > } > > > > > > +static int create_in_format_async_blob(struct drm_device *dev, struct > > > +drm_plane *plane) { > > > + const struct drm_mode_config *config = &dev->mode_config; > > > + struct drm_property_blob *blob; > > > + struct drm_format_modifier *async_mod; > > > + size_t blob_size, async_formats_size, async_modifiers_size; > > > + struct drm_format_modifier_blob *blob_data; > > > + unsigned int i, j; > > > + > > > + async_formats_size = sizeof(__u32) * plane->async_format_count; > > > + if (WARN_ON(!async_formats_size)) { > > > + /* 0 formats are never expected */ > > > + return 0; > > > + } > > > + > > > + async_modifiers_size = > > > + sizeof(struct drm_format_modifier) * plane- > > >async_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 > > > + * should be naturally aligned to 8B. > > > + */ > > > + BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8); > > > + blob_size += ALIGN(async_formats_size, 8); > > > + blob_size += async_modifiers_size; > > > + > > > + blob = drm_property_create_blob(dev, blob_size, NULL); > > > + if (IS_ERR(blob)) > > > + return -1; > > > + > > > + blob_data = blob->data; > > > + blob_data->version = FORMAT_BLOB_CURRENT; > > > + blob_data->count_formats = plane->async_format_count; > > > + blob_data->formats_offset = sizeof(struct drm_format_modifier_blob); > > > + blob_data->count_modifiers = plane->async_modifier_count; > > > + > > > + blob_data->modifiers_offset = > > > + ALIGN(blob_data->formats_offset + async_formats_size, 8); > > > + > > > + memcpy(formats_ptr(blob_data), plane->async_format_types, > > > +async_formats_size); > > > + > > > + async_mod = modifiers_ptr(blob_data); > > > + for (i = 0; i < plane->async_modifier_count; i++) { > > > + for (j = 0; j < plane->async_format_count; j++) { > > > + if (!plane->funcs->format_mod_supported || > > > + plane->funcs->format_mod_supported(plane, > > > + plane- > > >async_format_types[j], > > > + plane- > > >async_modifiers[i])) { > > > + async_mod->formats |= 1ULL << j; > > > + } > > > + } > > > + > > > + async_mod->modifier = plane->async_modifiers[i]; > > > + async_mod->offset = 0; > > > + async_mod->pad = 0; > > > + async_mod++; > > > + } > > > + > > > + drm_object_attach_property(&plane->base, config- > > >async_modifiers_property, > > > + blob->base.id); > > > + > > > + return 0; > > > +} > > > > That is a verbatim copy of the existing code. Please refactor the current code so > > that it can be reused. > > > Ok will look into it in the next revision. > > > > + > > > /** > > > * DOC: hotspot properties > > > * > > > @@ -472,6 +542,9 @@ static int __drm_universal_plane_init(struct > > drm_device *dev, > > > if (format_modifier_count) > > > create_in_format_blob(dev, plane); > > > > > > + if (plane->async_modifier_count) > > > + create_in_format_async_blob(dev, plane); > > > + > > > return 0; > > > } > > > > > > diff --git a/include/drm/drm_mode_config.h > > > b/include/drm/drm_mode_config.h index 271765e2e9f2..0c116d6dfd27 > > > 100644 > > > --- a/include/drm/drm_mode_config.h > > > +++ b/include/drm/drm_mode_config.h > > > @@ -936,6 +936,12 @@ struct drm_mode_config { > > > */ > > > struct drm_property *modifiers_property; > > > > > > + /** > > > + * @async_modifiers_property: Plane property to list support > > modifier/format > > > + * combination for asynchronous flips. > > > + */ > > > + struct drm_property *async_modifiers_property; > > > + > > > /** > > > * @size_hints_property: Plane SIZE_HINTS property. > > > */ > > > diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index > > > dd718c62ac31..d9571265251a 100644 > > > --- a/include/drm/drm_plane.h > > > +++ b/include/drm/drm_plane.h > > > @@ -658,11 +658,21 @@ struct drm_plane { > > > */ > > > bool format_default; > > > > > > + /** @format_types: array of formats supported by this plane */ > > > + uint32_t *async_format_types; > > > + /** @format_count: Size of the array pointed at by @format_types. */ > > > + unsigned int async_format_count; > > > + > > > /** @modifiers: array of modifiers supported by this plane */ > > > uint64_t *modifiers; > > > /** @modifier_count: Size of the array pointed at by @modifier_count. > > */ > > > unsigned int modifier_count; > > > > > > + /** @modifiers: array of modifiers supported by this plane */ > > > + uint64_t *async_modifiers; > > > + /** @modifier_count: Size of the array pointed at by @modifier_count. > > */ > > > + unsigned int async_modifier_count; > > > > I'm not sure adding any of this is really useful. I think we could just add a new > > .format_mod_supported_async() hook instead (which could be implemented in > > terms of the current thing + something like > > https://patchwork.freedesktop.org/patch/619047/?series=139807&rev=3 > > > > That would also be more flexible since it can allow specific > > format+modifier combinations to be either accepted or rejected. > > > This would not serve the purpose. The purpose here is to expose the supported list to the user so that user can have this ahead and check for the modifier/format before sending the flip. This would avoid async flip failures due to unsupported modifier/format. It would work just fine, and wouldn't affect the uapi at all. The difference is that you don't have to bloat the plane struct with those mostly unnecessary format/modifier lists. > > This approach has been acknowledged from the userspace which can be located @ https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4063 > > Thanks and Regards, > Arun R Murthy > ------------------- > > > + > > > /** > > > * @crtc: > > > * > > > -- > > > 2.25.1 > > > > -- > > Ville Syrjälä > > Intel
diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c index 37d2e0a4ef4b..cff189a2e751 100644 --- a/drivers/gpu/drm/drm_mode_config.c +++ b/drivers/gpu/drm/drm_mode_config.c @@ -379,6 +379,13 @@ static int drm_mode_create_standard_properties(struct drm_device *dev) return -ENOMEM; dev->mode_config.size_hints_property = prop; + prop = drm_property_create(dev, + DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, + "IN_FORMATS_ASYNC", 0); + if (!prop) + return -ENOMEM; + dev->mode_config.async_modifiers_property = prop; + return 0; } diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index a28b22fdd7a4..01b8e6932fda 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -141,6 +141,12 @@ * various bugs in this area with inconsistencies between the capability * flag and per-plane properties. * + * IN_FORMATS_ASYNC: + * Blob property which contains the set of buffer format and modifier + * pairs supported by this plane for asynchronous flips. The blob is a struct + * drm_format_modifier_blob. Without this property the plane doesn't + * support buffers with modifiers. Userspace cannot change this property. + * * SIZE_HINTS: * Blob property which contains the set of recommended plane size * which can used for simple "cursor like" use cases (eg. no scaling). @@ -249,6 +255,70 @@ static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane return 0; } +static int create_in_format_async_blob(struct drm_device *dev, struct drm_plane *plane) +{ + const struct drm_mode_config *config = &dev->mode_config; + struct drm_property_blob *blob; + struct drm_format_modifier *async_mod; + size_t blob_size, async_formats_size, async_modifiers_size; + struct drm_format_modifier_blob *blob_data; + unsigned int i, j; + + async_formats_size = sizeof(__u32) * plane->async_format_count; + if (WARN_ON(!async_formats_size)) { + /* 0 formats are never expected */ + return 0; + } + + async_modifiers_size = + sizeof(struct drm_format_modifier) * plane->async_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 + * should be naturally aligned to 8B. + */ + BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8); + blob_size += ALIGN(async_formats_size, 8); + blob_size += async_modifiers_size; + + blob = drm_property_create_blob(dev, blob_size, NULL); + if (IS_ERR(blob)) + return -1; + + blob_data = blob->data; + blob_data->version = FORMAT_BLOB_CURRENT; + blob_data->count_formats = plane->async_format_count; + blob_data->formats_offset = sizeof(struct drm_format_modifier_blob); + blob_data->count_modifiers = plane->async_modifier_count; + + blob_data->modifiers_offset = + ALIGN(blob_data->formats_offset + async_formats_size, 8); + + memcpy(formats_ptr(blob_data), plane->async_format_types, async_formats_size); + + async_mod = modifiers_ptr(blob_data); + for (i = 0; i < plane->async_modifier_count; i++) { + for (j = 0; j < plane->async_format_count; j++) { + if (!plane->funcs->format_mod_supported || + plane->funcs->format_mod_supported(plane, + plane->async_format_types[j], + plane->async_modifiers[i])) { + async_mod->formats |= 1ULL << j; + } + } + + async_mod->modifier = plane->async_modifiers[i]; + async_mod->offset = 0; + async_mod->pad = 0; + async_mod++; + } + + drm_object_attach_property(&plane->base, config->async_modifiers_property, + blob->base.id); + + return 0; +} + /** * DOC: hotspot properties * @@ -472,6 +542,9 @@ static int __drm_universal_plane_init(struct drm_device *dev, if (format_modifier_count) create_in_format_blob(dev, plane); + if (plane->async_modifier_count) + create_in_format_async_blob(dev, plane); + return 0; } diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index 271765e2e9f2..0c116d6dfd27 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -936,6 +936,12 @@ struct drm_mode_config { */ struct drm_property *modifiers_property; + /** + * @async_modifiers_property: Plane property to list support modifier/format + * combination for asynchronous flips. + */ + struct drm_property *async_modifiers_property; + /** * @size_hints_property: Plane SIZE_HINTS property. */ diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index dd718c62ac31..d9571265251a 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -658,11 +658,21 @@ struct drm_plane { */ bool format_default; + /** @format_types: array of formats supported by this plane */ + uint32_t *async_format_types; + /** @format_count: Size of the array pointed at by @format_types. */ + unsigned int async_format_count; + /** @modifiers: array of modifiers supported by this plane */ uint64_t *modifiers; /** @modifier_count: Size of the array pointed at by @modifier_count. */ unsigned int modifier_count; + /** @modifiers: array of modifiers supported by this plane */ + uint64_t *async_modifiers; + /** @modifier_count: Size of the array pointed at by @modifier_count. */ + unsigned int async_modifier_count; + /** * @crtc: *
There exists a property IN_FORMATS which exposes the plane supported modifiers/formats to the user. In some platforms when asynchronous flips are used all of modifiers/formats mentioned in IN_FORMATS are not supported. This patch adds a new plane property IN_FORMATS_ASYNC to expose the async flips supported modifiers/formats so that user can use this information ahead and done flips with unsupported formats/modifiers. This will save flips failures. Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com> --- drivers/gpu/drm/drm_mode_config.c | 7 +++ drivers/gpu/drm/drm_plane.c | 73 +++++++++++++++++++++++++++++++ include/drm/drm_mode_config.h | 6 +++ include/drm/drm_plane.h | 10 +++++ 4 files changed, 96 insertions(+)