Op 10-04-2019 om 13:11 schreef Ben Davis:
> Add new properties to specify width and height for writeback.
>
> Signed-off-by: Ben Davis <ben.da...@arm.com>
> ---
> drivers/gpu/drm/drm_atomic_uapi.c | 8 ++++++++
> drivers/gpu/drm/drm_writeback.c | 28 ++++++++++++++++++++++++++++
> include/drm/drm_connector.h | 4 ++++
> include/drm/drm_mode_config.h | 10 ++++++++++
> 4 files changed, 50 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c
> b/drivers/gpu/drm/drm_atomic_uapi.c
> index d520a04..1f68dce 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -765,6 +765,10 @@ static int drm_atomic_connector_set_property(struct
> drm_connector *connector,
> return -EINVAL;
> }
> state->content_protection = val;
> + } else if (property == config->prop_writeback_w) {
> + state->writeback_w = val;
> + } else if (property == config->prop_writeback_h) {
> + state->writeback_h = val;
> } else if (property == config->writeback_fb_id_property) {
> struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL,
> val);
> int ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
> @@ -837,6 +841,10 @@ drm_atomic_connector_get_property(struct drm_connector
> *connector,
> *val = state->scaling_mode;
> } else if (property == connector->content_protection_property) {
> *val = state->content_protection;
> + } else if (property == config->prop_writeback_w) {
> + *val = state->writeback_w;
> + } else if (property == config->prop_writeback_h) {
> + *val = state->writeback_h;
> } else if (property == config->writeback_fb_id_property) {
> /* Writeback framebuffer is one-shot, write and forget */
> *val = 0;
> diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c
> index c20e6fe..be42073 100644
> --- a/drivers/gpu/drm/drm_writeback.c
> +++ b/drivers/gpu/drm/drm_writeback.c
> @@ -74,6 +74,12 @@
> * applications making use of writeback connectors *always* retrieve an
> * out-fence for the commit and use it appropriately.
> * From userspace, this property will always read as zero.
> + *
> + * "WRITEBACK_W":
> + * The width of the writeback buffer to write back.
> + *
> + * "WRITEBACK_H":
> + * The height of the writeback buffer to write back.
What happens when they are not set, and left to default 0?
~Maarten
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