[PATCH v4 4/4] drm/vkms: add overlay support
Melissa Wen
melissa.srw at gmail.com
Mon Apr 26 17:07:07 UTC 2021
On 04/26, Pekka Paalanen wrote:
> On Sat, 24 Apr 2021 05:26:10 -0300
> Melissa Wen <melissa.srw at gmail.com> wrote:
>
> > Add support to overlay plane, in addition to primary and cursor
> > planes. In this approach, the plane composition still requires an
> > active primary plane and planes are composed associatively in the
> > order: (primary <- overlay) <- cursor
> >
> > It enables to run the following IGT tests successfully:
> > - kms_plane_cursor:
> > - pipe-A-[overlay, primary, viewport]-size-[64, 128, 256]
> > - kms_atomic:
> > - plane-overlay-legacy
> > and preserves the successful execution of kms_cursor_crc,
> > kms_writeback and kms_flip
> >
> > Signed-off-by: Melissa Wen <melissa.srw at gmail.com>
> > Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
>
> Hi,
>
> just curious, when you need to compute a CRC without having a writeback
> connector output, where do you write the blended result in order to
> compute CRC?
Hi,
so, when no writeback output, an output frame is allocated in the
compose_planes functions to get the plane composition there, as shown
here: https://lkml.org/lkml/2020/8/30/163
Melissa
>
>
> Thanks,
> pq
>
> > ---
> > drivers/gpu/drm/vkms/vkms_composer.c | 27 +++++++++++++++++----------
> > drivers/gpu/drm/vkms/vkms_drv.c | 5 +++++
> > drivers/gpu/drm/vkms/vkms_drv.h | 1 +
> > drivers/gpu/drm/vkms/vkms_output.c | 11 ++++++++++-
> > drivers/gpu/drm/vkms/vkms_plane.c | 15 ++++++++++++---
> > 5 files changed, 45 insertions(+), 14 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
> > index 7e01bc39d2a1..1b510f3dbcbf 100644
> > --- a/drivers/gpu/drm/vkms/vkms_composer.c
> > +++ b/drivers/gpu/drm/vkms/vkms_composer.c
> > @@ -176,11 +176,12 @@ static void compose_plane(struct vkms_composer *primary_composer,
> >
> > static int compose_active_planes(void **vaddr_out,
> > struct vkms_composer *primary_composer,
> > - struct vkms_composer *cursor_composer)
> > + struct vkms_crtc_state *crtc_state)
> > {
> > struct drm_framebuffer *fb = &primary_composer->fb;
> > struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0);
> > struct drm_gem_shmem_object *shmem_obj = to_drm_gem_shmem_obj(gem_obj);
> > + int i;
> >
> > if (!*vaddr_out) {
> > *vaddr_out = kzalloc(shmem_obj->base.size, GFP_KERNEL);
> > @@ -195,8 +196,14 @@ static int compose_active_planes(void **vaddr_out,
> >
> > memcpy(*vaddr_out, shmem_obj->vaddr, shmem_obj->base.size);
> >
> > - if (cursor_composer)
> > - compose_plane(primary_composer, cursor_composer, *vaddr_out);
> > + /* If there are other planes besides primary, we consider the active
> > + * planes should be in z-order and compose them associatively:
> > + * ((primary <- overlay) <- cursor)
> > + */
> > + for (i = 1; i < crtc_state->num_active_planes; i++)
> > + compose_plane(primary_composer,
> > + crtc_state->active_planes[i]->composer,
> > + *vaddr_out);
> >
> > return 0;
> > }
> > @@ -218,7 +225,7 @@ void vkms_composer_worker(struct work_struct *work)
> > struct drm_crtc *crtc = crtc_state->base.crtc;
> > struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
> > struct vkms_composer *primary_composer = NULL;
> > - struct vkms_composer *cursor_composer = NULL;
> > + struct vkms_plane_state *act_plane = NULL;
> > bool crc_pending, wb_pending;
> > void *vaddr_out = NULL;
> > u32 crc32 = 0;
> > @@ -242,11 +249,11 @@ void vkms_composer_worker(struct work_struct *work)
> > if (!crc_pending)
> > return;
> >
> > - if (crtc_state->num_active_planes >= 1)
> > - primary_composer = crtc_state->active_planes[0]->composer;
> > -
> > - if (crtc_state->num_active_planes == 2)
> > - cursor_composer = crtc_state->active_planes[1]->composer;
> > + if (crtc_state->num_active_planes >= 1) {
> > + act_plane = crtc_state->active_planes[0];
> > + if (act_plane->base.plane->type == DRM_PLANE_TYPE_PRIMARY)
> > + primary_composer = act_plane->composer;
> > + }
> >
> > if (!primary_composer)
> > return;
> > @@ -255,7 +262,7 @@ void vkms_composer_worker(struct work_struct *work)
> > vaddr_out = crtc_state->active_writeback;
> >
> > ret = compose_active_planes(&vaddr_out, primary_composer,
> > - cursor_composer);
> > + crtc_state);
> > if (ret) {
> > if (ret == -EINVAL && !wb_pending)
> > kfree(vaddr_out);
> > diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> > index 2173b82606f6..027ffe759440 100644
> > --- a/drivers/gpu/drm/vkms/vkms_drv.c
> > +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> > @@ -44,6 +44,10 @@ static bool enable_writeback = true;
> > module_param_named(enable_writeback, enable_writeback, bool, 0444);
> > MODULE_PARM_DESC(enable_writeback, "Enable/Disable writeback connector support");
> >
> > +static bool enable_overlay;
> > +module_param_named(enable_overlay, enable_overlay, bool, 0444);
> > +MODULE_PARM_DESC(enable_overlay, "Enable/Disable overlay support");
> > +
> > DEFINE_DRM_GEM_FOPS(vkms_driver_fops);
> >
> > static void vkms_release(struct drm_device *dev)
> > @@ -198,6 +202,7 @@ static int __init vkms_init(void)
> >
> > config->cursor = enable_cursor;
> > config->writeback = enable_writeback;
> > + config->overlay = enable_overlay;
> >
> > return vkms_create(config);
> > }
> > diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> > index 70fb79621617..ac8c9c2fa4ed 100644
> > --- a/drivers/gpu/drm/vkms/vkms_drv.h
> > +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> > @@ -89,6 +89,7 @@ struct vkms_device;
> > struct vkms_config {
> > bool writeback;
> > bool cursor;
> > + bool overlay;
> > /* only set when instantiated */
> > struct vkms_device *dev;
> > };
> > diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
> > index 6979fbc7f821..04406bd3ff02 100644
> > --- a/drivers/gpu/drm/vkms/vkms_output.c
> > +++ b/drivers/gpu/drm/vkms/vkms_output.c
> > @@ -39,7 +39,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
> > struct drm_connector *connector = &output->connector;
> > struct drm_encoder *encoder = &output->encoder;
> > struct drm_crtc *crtc = &output->crtc;
> > - struct vkms_plane *primary, *cursor = NULL;
> > + struct vkms_plane *primary, *cursor = NULL, *overlay = NULL;
> > int ret;
> > int writeback;
> >
> > @@ -47,6 +47,15 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
> > if (IS_ERR(primary))
> > return PTR_ERR(primary);
> >
> > + if (vkmsdev->config->overlay) {
> > + overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
> > + if (IS_ERR(overlay))
> > + return PTR_ERR(overlay);
> > +
> > + if (!overlay->base.possible_crtcs)
> > + overlay->base.possible_crtcs = drm_crtc_mask(crtc);
> > + }
> > +
> > if (vkmsdev->config->cursor) {
> > cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
> > if (IS_ERR(cursor))
> > diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> > index da4251aff67f..107521ace597 100644
> > --- a/drivers/gpu/drm/vkms/vkms_plane.c
> > +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> > @@ -133,7 +133,7 @@ static int vkms_plane_atomic_check(struct drm_plane *plane,
> > if (IS_ERR(crtc_state))
> > return PTR_ERR(crtc_state);
> >
> > - if (plane->type == DRM_PLANE_TYPE_CURSOR)
> > + if (plane->type != DRM_PLANE_TYPE_PRIMARY)
> > can_position = true;
> >
> > ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
> > @@ -200,14 +200,23 @@ struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
> > const u32 *formats;
> > int nformats;
> >
> > - if (type == DRM_PLANE_TYPE_CURSOR) {
> > + switch (type) {
> > + case DRM_PLANE_TYPE_PRIMARY:
> > + formats = vkms_formats;
> > + nformats = ARRAY_SIZE(vkms_formats);
> > + funcs = &vkms_primary_helper_funcs;
> > + break;
> > + case DRM_PLANE_TYPE_CURSOR:
> > + case DRM_PLANE_TYPE_OVERLAY:
> > formats = vkms_plane_formats;
> > nformats = ARRAY_SIZE(vkms_plane_formats);
> > funcs = &vkms_primary_helper_funcs;
> > - } else {
> > + break;
> > + default:
> > formats = vkms_formats;
> > nformats = ARRAY_SIZE(vkms_formats);
> > funcs = &vkms_primary_helper_funcs;
> > + break;
> > }
> >
> > plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index,
>
More information about the dri-devel
mailing list