[RFC PATCH v3 1/3] drm: Introduce solid fill property for drm plane
Harry Wentland
harry.wentland at amd.com
Wed Jan 18 18:57:06 UTC 2023
On 1/4/23 18:40, Jessica Zhang wrote:
> Add support for solid_fill property to drm_plane. In addition, add
> support for setting and getting the values for solid_fill.
>
> solid_fill holds data for supporting solid fill planes. The property
> accepts an RGB323232 value and the driver data is formatted as such:
>
> struct drm_solid_fill {
> u32 r;
> u32 g;
> u32 b;
> };
Rather than special-casing this would it make sense to define this
as a single pixel of a FOURCC property?
I.e., something like this:
struct drm_solid_fill_info {
u32 format; /* FOURCC value */
u64 value; /* FOURCC pixel value */
}
That removes some ambiguity how the value should be interpreted, i.e.,
it can be interpreted like a single pixel of the specified FOURCC format.
It might also make sense to let drivers advertise the supported
FOURCC formats for solid_fill planes.
Is there an implementation for this in a corresponding canonical
upstream userspace project, to satisfy [1]? If not, what is the plan
for this? If so, please point to the corresponding patches.
[1] https://dri.freedesktop.org/docs/drm/gpu/drm-uapi.html#open-source-userspace-requirements
Harry
>
> To enable solid fill planes, userspace must assigned solid_fill to a
> property blob containing the following information:
>
> struct drm_solid_fill_info {
> u8 version;
> u32 r, g, b;
> };
>
> Changes in V2:
> - Changed solid_fill property to a property blob (Simon, Dmitry)
> - Added drm_solid_fill struct (Simon)
> - Added drm_solid_fill_info struct (Simon)
>
> Changes in V3:
> - Corrected typo in drm_solid_fill struct documentation
>
> Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
> ---
> drivers/gpu/drm/drm_atomic_state_helper.c | 9 ++++
> drivers/gpu/drm/drm_atomic_uapi.c | 59 +++++++++++++++++++++++
> drivers/gpu/drm/drm_blend.c | 17 +++++++
> include/drm/drm_blend.h | 1 +
> include/drm/drm_plane.h | 43 +++++++++++++++++
> 5 files changed, 129 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> index dfb57217253b..c96fd1f2ad99 100644
> --- a/drivers/gpu/drm/drm_atomic_state_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> @@ -253,6 +253,11 @@ void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *plane_state,
> plane_state->alpha = DRM_BLEND_ALPHA_OPAQUE;
> plane_state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
>
> + if (plane_state->solid_fill_blob) {
> + drm_property_blob_put(plane_state->solid_fill_blob);
> + plane_state->solid_fill_blob = NULL;
> + }
> +
> if (plane->color_encoding_property) {
> if (!drm_object_property_get_default_value(&plane->base,
> plane->color_encoding_property,
> @@ -335,6 +340,9 @@ void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
> if (state->fb)
> drm_framebuffer_get(state->fb);
>
> + if (state->solid_fill_blob)
> + drm_property_blob_get(state->solid_fill_blob);
> +
> state->fence = NULL;
> state->commit = NULL;
> state->fb_damage_clips = NULL;
> @@ -384,6 +392,7 @@ void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
> drm_crtc_commit_put(state->commit);
>
> drm_property_blob_put(state->fb_damage_clips);
> + drm_property_blob_put(state->solid_fill_blob);
> }
> EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
>
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index c06d0639d552..8a1d2fb7a757 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -316,6 +316,55 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
> }
> EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
>
> +static void drm_atomic_convert_solid_fill_info(struct drm_solid_fill *out,
> + struct drm_solid_fill_info *in)
> +{
> + out->r = in->r;
> + out->g = in->g;
> + out->b = in->b;
> +}
> +
> +static int drm_atomic_set_solid_fill_prop(struct drm_plane_state *state,
> + struct drm_property_blob *blob)
> +{
> + int ret = 0;
> + int blob_version;
> +
> + if (blob == state->solid_fill_blob)
> + return 0;
> +
> + drm_property_blob_put(state->solid_fill_blob);
> + state->solid_fill_blob = NULL;
> +
> + memset(&state->solid_fill, 0, sizeof(state->solid_fill));
> +
> + if (blob) {
> + if (blob->length != sizeof(struct drm_solid_fill_info)) {
> + drm_dbg_atomic(state->plane->dev,
> + "[PLANE:%d:%s] bad solid fill blob length: %zu\n",
> + state->plane->base.id, state->plane->name,
> + blob->length);
> + return -EINVAL;
> + }
> +
> + blob_version = ((struct drm_solid_fill_info *)blob->data)->version;
> +
> + /* Append with more versions if necessary */
> + if (blob_version == 1) {
> + drm_atomic_convert_solid_fill_info(&state->solid_fill, blob->data);
> + } else {
> + drm_dbg_atomic(state->plane->dev,
> + "[PLANE:%d:%s] failed to set solid fill (ret=%d)\n",
> + state->plane->base.id, state->plane->name,
> + ret);
> + return -EINVAL;
> + }
> + state->solid_fill_blob = drm_property_blob_get(blob);
> + }
> +
> + return ret;
> +}
> +
> static void set_out_fence_for_crtc(struct drm_atomic_state *state,
> struct drm_crtc *crtc, s32 __user *fence_ptr)
> {
> @@ -544,6 +593,13 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane,
> state->src_w = val;
> } else if (property == config->prop_src_h) {
> state->src_h = val;
> + } else if (property == plane->solid_fill_property) {
> + struct drm_property_blob *solid_fill = drm_property_lookup_blob(dev, val);
> +
> + ret = drm_atomic_set_solid_fill_prop(state, solid_fill);
> + drm_property_blob_put(solid_fill);
> +
> + return ret;
> } else if (property == plane->alpha_property) {
> state->alpha = val;
> } else if (property == plane->blend_mode_property) {
> @@ -616,6 +672,9 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
> *val = state->src_w;
> } else if (property == config->prop_src_h) {
> *val = state->src_h;
> + } else if (property == plane->solid_fill_property) {
> + *val = state->solid_fill_blob ?
> + state->solid_fill_blob->base.id : 0;
> } else if (property == plane->alpha_property) {
> *val = state->alpha;
> } else if (property == plane->blend_mode_property) {
> diff --git a/drivers/gpu/drm/drm_blend.c b/drivers/gpu/drm/drm_blend.c
> index b4c8cab7158c..17ab645c8309 100644
> --- a/drivers/gpu/drm/drm_blend.c
> +++ b/drivers/gpu/drm/drm_blend.c
> @@ -616,3 +616,20 @@ int drm_plane_create_blend_mode_property(struct drm_plane *plane,
> return 0;
> }
> EXPORT_SYMBOL(drm_plane_create_blend_mode_property);
> +
> +int drm_plane_create_solid_fill_property(struct drm_plane *plane)
> +{
> + struct drm_property *prop;
> +
> + prop = drm_property_create(plane->dev,
> + DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
> + "solid_fill", 0);
> + if (!prop)
> + return -ENOMEM;
> +
> + drm_object_attach_property(&plane->base, prop, 0);
> + plane->solid_fill_property = prop;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(drm_plane_create_solid_fill_property);
> diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h
> index 88bdfec3bd88..0338a860b9c8 100644
> --- a/include/drm/drm_blend.h
> +++ b/include/drm/drm_blend.h
> @@ -58,4 +58,5 @@ int drm_atomic_normalize_zpos(struct drm_device *dev,
> struct drm_atomic_state *state);
> int drm_plane_create_blend_mode_property(struct drm_plane *plane,
> unsigned int supported_modes);
> +int drm_plane_create_solid_fill_property(struct drm_plane *plane);
> #endif
> diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
> index 447e664e49d5..3b9da06f358b 100644
> --- a/include/drm/drm_plane.h
> +++ b/include/drm/drm_plane.h
> @@ -40,6 +40,25 @@ enum drm_scaling_filter {
> DRM_SCALING_FILTER_NEAREST_NEIGHBOR,
> };
>
> +/**
> + * struct drm_solid_fill_info - User info for solid fill planes
> + */
> +struct drm_solid_fill_info {
> + __u8 version;
> + __u32 r, g, b;
> +};
> +
> +/**
> + * struct solid_fill_property - RGB values for solid fill plane
> + *
> + * Note: This is the V1 for this feature
> + */
> +struct drm_solid_fill {
> + uint32_t r;
> + uint32_t g;
> + uint32_t b;
> +};
> +
> /**
> * struct drm_plane_state - mutable plane state
> *
> @@ -116,6 +135,23 @@ struct drm_plane_state {
> /** @src_h: height of visible portion of plane (in 16.16) */
> uint32_t src_h, src_w;
>
> + /**
> + * @solid_fill_blob:
> + *
> + * Blob containing relevant information for a solid fill plane
> + * including pixel format and data. See
> + * drm_plane_create_solid_fill_property() for more details.
> + */
> + struct drm_property_blob *solid_fill_blob;
> +
> + /**
> + * @solid_fill:
> + *
> + * Pixel data for solid fill planes. See
> + * drm_plane_create_solid_fill_property() for more details.
> + */
> + struct drm_solid_fill solid_fill;
> +
> /**
> * @alpha:
> * Opacity of the plane with 0 as completely transparent and 0xffff as
> @@ -699,6 +735,13 @@ struct drm_plane {
> */
> struct drm_plane_state *state;
>
> + /*
> + * @solid_fill_property:
> + * Optional solid_fill property for this plane. See
> + * drm_plane_create_solid_fill_property().
> + */
> + struct drm_property *solid_fill_property;
> +
> /**
> * @alpha_property:
> * Optional alpha property for this plane. See
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