[PATCH 14/19] drm/atomic-helper: implementatations for legacy interfaces
Daniel Vetter
daniel.vetter at ffwll.ch
Sun Jul 27 14:41:43 PDT 2014
Well, except page_flip since that requires async commit, which isn't
there yet.
For the functions which changes planes there's a bit of trickery
involved to keep the fb refcounting working. But otherwise fairly
straight-forward atomic updates.
The property setting functions are still a bit incomplete. Once we
have generic properties (e.g. rotation, but also all the properties
needed by the atomic ioctl) we need to filter those out and parse them
in the helper. Preferrably with the same function as used by the real
atomic ioctl implementation.
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/drm_atomic_helper.c | 481 ++++++++++++++++++++++++++++++++++++
include/drm/drm_atomic_helper.h | 21 ++
2 files changed, 502 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index d5d2eb2908cc..1b13394cf020 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -939,3 +939,484 @@ void drm_atomic_helper_swap_state(struct drm_device *dev,
}
}
EXPORT_SYMBOL(drm_atomic_helper_swap_state);
+
+/**
+ * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
+ * @plane: plane object to update
+ * @crtc: owning CRTC of owning plane
+ * @fb: framebuffer to flip onto plane
+ * @crtc_x: x offset of primary plane on crtc
+ * @crtc_y: y offset of primary plane on crtc
+ * @crtc_w: width of primary plane rectangle on crtc
+ * @crtc_h: height of primary plane rectangle on crtc
+ * @src_x: x offset of @fb for panning
+ * @src_y: y offset of @fb for panning
+ * @src_w: width of source rectangle in @fb
+ * @src_h: height of source rectangle in @fb
+ *
+ * Provides a default plane update handler using the atomic driver interface.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure
+ */
+int drm_atomic_helper_update_plane(struct drm_plane *plane,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ int crtc_x, int crtc_y,
+ unsigned int crtc_w, unsigned int crtc_h,
+ uint32_t src_x, uint32_t src_y,
+ uint32_t src_w, uint32_t src_h)
+{
+ struct drm_atomic_state *state;
+ struct drm_plane_state *plane_state;
+ int ret = 0;
+
+ state = drm_atomic_state_alloc(plane->dev);
+ if (!state)
+ return -ENOMEM;
+
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
+retry:
+ plane_state = drm_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state)) {
+ ret = PTR_ERR(plane_state);
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ plane_state->crtc = crtc;
+ plane_state->fb = fb;
+ plane_state->crtc_x = crtc_x;
+ plane_state->crtc_y = crtc_y;
+ plane_state->crtc_h = crtc_h;
+ plane_state->crtc_w = crtc_w;
+ plane_state->src_x = src_x;
+ plane_state->src_y = src_y;
+ plane_state->src_h = src_h;
+ plane_state->src_w = src_w;
+
+ ret = drm_atomic_commit(state);
+ if (ret == -EDEADLK)
+ goto backoff;
+fail:
+ drm_atomic_state_free(state);
+
+ return ret;
+backoff:
+ drm_atomic_legacy_backoff(state);
+ drm_atomic_state_clear(state);
+
+ /*
+ * Someone might have exchanged the framebuffer while we dropped locks
+ * in the backoff code. We need to fix up the fb refcount tracking the
+ * core does for us.
+ */
+ plane->old_fb = plane->fb;
+
+ goto retry;
+}
+EXPORT_SYMBOL(drm_atomic_helper_update_plane);
+
+/**
+ * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
+ * @plane: plane to disable
+ *
+ * Provides a default plane disablle handler using the atomic driver interface.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure
+ */
+int drm_atomic_helper_disable_plane(struct drm_plane *plane)
+{
+ struct drm_atomic_state *state;
+ struct drm_plane_state *plane_state;
+ int ret = 0;
+
+ state = drm_atomic_state_alloc(plane->dev);
+ if (!state)
+ return -ENOMEM;
+
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc);
+retry:
+ plane_state = drm_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state)) {
+ ret = PTR_ERR(plane_state);
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ plane_state->crtc = NULL;
+ plane_state->fb = NULL;
+ plane_state->crtc_x = 0;
+ plane_state->crtc_y = 0;
+ plane_state->crtc_h = 0;
+ plane_state->crtc_w = 0;
+ plane_state->src_x = 0;
+ plane_state->src_y = 0;
+ plane_state->src_h = 0;
+ plane_state->src_w = 0;
+
+ ret = drm_atomic_commit(state);
+ if (ret == -EDEADLK)
+ goto backoff;
+fail:
+ drm_atomic_state_free(state);
+
+ return ret;
+backoff:
+ drm_atomic_legacy_backoff(state);
+ drm_atomic_state_clear(state);
+
+ /*
+ * Someone might have exchanged the framebuffer while we dropped locks
+ * in the backoff code. We need to fix up the fb refcount tracking the
+ * core does for us.
+ */
+ plane->old_fb = plane->fb;
+
+ goto retry;
+}
+EXPORT_SYMBOL(drm_atomic_helper_disable_plane);
+
+static int update_output_state(struct drm_atomic_state *state,
+ struct drm_mode_set *set)
+{
+ struct drm_device *dev = set->crtc->dev;
+ struct drm_connector_state *conn_state;
+ struct drm_crtc_state *crtc_state;
+ struct drm_crtc *crtc;
+ int nconnectors = state->dev->mode_config.num_connector;
+ int ncrtcs = state->dev->mode_config.num_crtc;
+ int ret, i, j;
+
+ /* First grab all affected connector/crtc states. */
+ ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
+ state->acquire_ctx);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < set->num_connectors; i++) {
+ conn_state = drm_atomic_get_connector_state(state,
+ set->connectors[i]);
+ if (IS_ERR(conn_state))
+ return PTR_ERR(conn_state);
+ }
+
+ for (i = 0; i < ncrtcs; i++) {
+ crtc = state->crtcs[i];
+
+ if (!crtc)
+ continue;
+
+ ret = drm_atomic_add_affected_connectors(state, crtc);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < nconnectors; i++) {
+ struct drm_connector *connector;
+
+ connector = state->connectors[i];
+ conn_state = state->connector_states[i];
+
+ if (!connector)
+ continue;
+
+ if (conn_state->crtc == crtc)
+ conn_state->crtc = NULL;
+
+ for (j = 0; j < set->num_connectors; j++) {
+ if (set->connectors[j] == connector) {
+ conn_state->crtc = crtc;
+ break;
+ }
+ }
+ }
+
+ for (i = 0; i < ncrtcs; i++) {
+ crtc = state->crtcs[i];
+ crtc_state = state->crtc_states[i];
+
+ if (!crtc)
+ continue;
+
+ crtc_state->enable =
+ drm_atomic_connectors_for_crtc(state, crtc);
+ }
+
+ return 0;
+}
+
+/**
+ * drm_atomic_helper_set_config - set a new config from userspace
+ * @set: mode set configuration
+ *
+ * Provides a default crtc set_config handler using the atomic driver interface.
+ *
+ * Returns:
+ * Returns 0 on success, negative errno numbers on failure.
+ */
+int drm_atomic_helper_set_config(struct drm_mode_set *set)
+{
+ struct drm_atomic_state *state;
+ struct drm_crtc *crtc = set->crtc;
+ struct drm_crtc_state *crtc_state;
+ struct drm_plane_state *primary_state;
+ int ret = 0;
+
+ state = drm_atomic_state_alloc(crtc->dev);
+ if (!state)
+ return -ENOMEM;
+
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
+retry:
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(crtc_state)) {
+ ret = PTR_ERR(crtc_state);
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ if (!set->mode) {
+ crtc_state->enable = false;
+ goto commit;
+ }
+
+ crtc_state->enable = true;
+ drm_mode_copy(&crtc_state->mode, set->mode);
+
+ primary_state = drm_atomic_get_plane_state(state, crtc->primary);
+ if (IS_ERR(primary_state)) {
+ ret = PTR_ERR(primary_state);
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ primary_state->crtc = crtc;
+ primary_state->fb = set->fb;
+ primary_state->crtc_x = 0;
+ primary_state->crtc_y = 0;
+ primary_state->crtc_h = set->mode->hdisplay;
+ primary_state->crtc_w = set->mode->vdisplay;
+ primary_state->src_x = set->x << 16;
+ primary_state->src_y = set->y << 16;
+ primary_state->src_h = set->mode->hdisplay << 16;
+ primary_state->src_w = set->mode->hdisplay << 16;
+
+ ret = update_output_state(state, set);
+ if (ret) {
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+commit:
+ ret = drm_atomic_commit(state);
+ if (ret == -EDEADLK)
+ goto backoff;
+fail:
+ drm_atomic_state_free(state);
+
+ return ret;
+backoff:
+ drm_atomic_legacy_backoff(state);
+ drm_atomic_state_clear(state);
+
+ /*
+ * Someone might have exchanged the framebuffer while we dropped locks
+ * in the backoff code. We need to fix up the fb refcount tracking the
+ * core does for us.
+ */
+ crtc->primary->old_fb = crtc->primary->fb;
+
+ goto retry;
+}
+
+/**
+ * drm_atomic_helper_crtc_set_property - helper for crtc prorties
+ * @crtc: DRM crtc
+ * @prorty: DRM property
+ * @val: value of property
+ *
+ * Provides a default plane disablle handler using the atomic driver interface.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure
+ */
+int
+drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
+ struct drm_property *property,
+ uint64_t val)
+{
+ struct drm_atomic_state *state;
+ struct drm_crtc_state *crtc_state;
+ int ret = 0;
+
+ state = drm_atomic_state_alloc(crtc->dev);
+ if (!state)
+ return -ENOMEM;
+
+ /* ->set_property is always called with all locks held. */
+ state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
+retry:
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(crtc_state)) {
+ ret = PTR_ERR(crtc_state);
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ ret = crtc->funcs->atomic_set_property(crtc, crtc_state,
+ property, val);
+ if (ret) {
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ ret = drm_atomic_commit(state);
+ if (ret == -EDEADLK)
+ goto backoff;
+fail:
+ drm_atomic_state_free(state);
+
+ return ret;
+backoff:
+ drm_atomic_legacy_backoff(state);
+ drm_atomic_state_clear(state);
+
+ goto retry;
+}
+EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property);
+
+/**
+ * drm_atomic_helper_plane_set_property - helper for plane prorties
+ * @plane: DRM plane
+ * @prorty: DRM property
+ * @val: value of property
+ *
+ * Provides a default plane disablle handler using the atomic driver interface.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure
+ */
+int
+drm_atomic_helper_plane_set_property(struct drm_plane *plane,
+ struct drm_property *property,
+ uint64_t val)
+{
+ struct drm_atomic_state *state;
+ struct drm_plane_state *plane_state;
+ int ret = 0;
+
+ state = drm_atomic_state_alloc(plane->dev);
+ if (!state)
+ return -ENOMEM;
+
+ /* ->set_property is always called with all locks held. */
+ state->acquire_ctx = plane->dev->mode_config.acquire_ctx;
+retry:
+ plane_state = drm_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state)) {
+ ret = PTR_ERR(plane_state);
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ ret = plane->funcs->atomic_set_property(plane, plane_state,
+ property, val);
+ if (ret) {
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ ret = drm_atomic_commit(state);
+ if (ret == -EDEADLK)
+ goto backoff;
+fail:
+ drm_atomic_state_free(state);
+
+ return ret;
+backoff:
+ drm_atomic_legacy_backoff(state);
+ drm_atomic_state_clear(state);
+
+ goto retry;
+}
+EXPORT_SYMBOL(drm_atomic_helper_plane_set_property);
+
+/**
+ * drm_atomic_helper_connector_set_property - helper for connector prorties
+ * @connector: DRM connector
+ * @prorty: DRM property
+ * @val: value of property
+ *
+ * Provides a default plane disablle handler using the atomic driver interface.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure
+ */
+int
+drm_atomic_helper_connector_set_property(struct drm_connector *connector,
+ struct drm_property *property,
+ uint64_t val)
+{
+ struct drm_atomic_state *state;
+ struct drm_connector_state *connector_state;
+ int ret = 0;
+
+ state = drm_atomic_state_alloc(connector->dev);
+ if (!state)
+ return -ENOMEM;
+
+ /* ->set_property is always called with all locks held. */
+ state->acquire_ctx = connector->dev->mode_config.acquire_ctx;
+retry:
+ connector_state = drm_atomic_get_connector_state(state, connector);
+ if (IS_ERR(connector_state)) {
+ ret = PTR_ERR(connector_state);
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ ret = connector->funcs->atomic_set_property(connector, connector_state,
+ property, val);
+ if (ret) {
+ if (ret == -EDEADLK)
+ goto backoff;
+ else
+ goto fail;
+ }
+
+ ret = drm_atomic_commit(state);
+ if (ret == -EDEADLK)
+ goto backoff;
+fail:
+ drm_atomic_state_free(state);
+
+ return ret;
+backoff:
+ drm_atomic_legacy_backoff(state);
+ drm_atomic_state_clear(state);
+
+ goto retry;
+}
+EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 9781ce739e10..8cd6fe7a48e5 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -49,4 +49,25 @@ void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
void drm_atomic_helper_swap_state(struct drm_device *dev,
struct drm_atomic_state *state);
+/* implementations for legacy interfaces */
+int drm_atomic_helper_update_plane(struct drm_plane *plane,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ int crtc_x, int crtc_y,
+ unsigned int crtc_w, unsigned int crtc_h,
+ uint32_t src_x, uint32_t src_y,
+ uint32_t src_w, uint32_t src_h);
+int drm_atomic_helper_disable_plane(struct drm_plane *plane);
+int drm_atomic_helper_set_config(struct drm_mode_set *set);
+
+int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
+ struct drm_property *property,
+ uint64_t val);
+int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
+ struct drm_property *property,
+ uint64_t val);
+int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
+ struct drm_property *property,
+ uint64_t val);
+
#endif /* DRM_ATOMIC_HELPER_H_ */
--
2.0.1
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