[Intel-gfx] [PATCH 03/18] drm: Extract drm_atomic_state_helper.[hc]
Daniel Vetter
daniel at ffwll.ch
Wed Oct 3 09:10:05 UTC 2018
On Tue, Oct 02, 2018 at 06:40:52PM +0300, Ville Syrjälä wrote:
> On Tue, Oct 02, 2018 at 03:35:11PM +0200, Daniel Vetter wrote:
> > We already have a separate overview doc for this, makes sense to
> > untangle it from the overall atomic helpers.
> >
> > v2: Rebase
> >
> > v3: Rebase more.
>
> Hopefully the rebases didn't leave any code changes behind...
I've redone the move on every rebase :-/
> Too lazy to read in full detail so
> Acked-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Thanks, I'll pick this one right up (just need to double-check CI).
-Daniel
>
> >
> > Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> > ---
> > Documentation/gpu/drm-kms-helpers.rst | 19 +-
> > drivers/gpu/drm/Makefile | 3 +-
> > drivers/gpu/drm/drm_atomic_helper.c | 566 --------------------
> > drivers/gpu/drm/drm_atomic_state_helper.c | 601 ++++++++++++++++++++++
> > include/drm/drm_atomic_helper.h | 44 +-
> > include/drm/drm_atomic_state_helper.h | 80 +++
> > 6 files changed, 698 insertions(+), 615 deletions(-)
> > create mode 100644 drivers/gpu/drm/drm_atomic_state_helper.c
> > create mode 100644 include/drm/drm_atomic_state_helper.h
> >
> > diff --git a/Documentation/gpu/drm-kms-helpers.rst b/Documentation/gpu/drm-kms-helpers.rst
> > index f9cfcdcdf024..4b4dc236ef6f 100644
> > --- a/Documentation/gpu/drm-kms-helpers.rst
> > +++ b/Documentation/gpu/drm-kms-helpers.rst
> > @@ -59,19 +59,28 @@ Implementing Asynchronous Atomic Commit
> > .. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
> > :doc: implementing nonblocking commit
> >
> > +Helper Functions Reference
> > +--------------------------
> > +
> > +.. kernel-doc:: include/drm/drm_atomic_helper.h
> > + :internal:
> > +
> > +.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
> > + :export:
> > +
> > Atomic State Reset and Initialization
> > -------------------------------------
> >
> > -.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
> > +.. kernel-doc:: drivers/gpu/drm/drm_atomic_state_helper.c
> > :doc: atomic state reset and initialization
> >
> > -Helper Functions Reference
> > ---------------------------
> > +Atomic State Helper Reference
> > +-----------------------------
> >
> > -.. kernel-doc:: include/drm/drm_atomic_helper.h
> > +.. kernel-doc:: include/drm/drm_atomic_state_helper.h
> > :internal:
> >
> > -.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
> > +.. kernel-doc:: drivers/gpu/drm/drm_atomic_state_helper.c
> > :export:
> >
> > Simple KMS Helper Reference
> > diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> > index bc6a16a3c36e..576ba985e138 100644
> > --- a/drivers/gpu/drm/Makefile
> > +++ b/drivers/gpu/drm/Makefile
> > @@ -36,7 +36,8 @@ drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o drm_probe_helper.o \
> > drm_plane_helper.o drm_dp_mst_topology.o drm_atomic_helper.o \
> > drm_kms_helper_common.o drm_dp_dual_mode_helper.o \
> > drm_simple_kms_helper.o drm_modeset_helper.o \
> > - drm_scdc_helper.o drm_gem_framebuffer_helper.o
> > + drm_scdc_helper.o drm_gem_framebuffer_helper.o \
> > + drm_atomic_state_helper.o
> >
> > drm_kms_helper-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
> > drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o
> > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> > index 8c93f33fe92f..a5edc8757056 100644
> > --- a/drivers/gpu/drm/drm_atomic_helper.c
> > +++ b/drivers/gpu/drm/drm_atomic_helper.c
> > @@ -3382,569 +3382,3 @@ int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc,
> > return ret;
> > }
> > EXPORT_SYMBOL(drm_atomic_helper_page_flip_target);
> > -
> > -/**
> > - * DOC: atomic state reset and initialization
> > - *
> > - * Both the drm core and the atomic helpers assume that there is always the full
> > - * and correct atomic software state for all connectors, CRTCs and planes
> > - * available. Which is a bit a problem on driver load and also after system
> > - * suspend. One way to solve this is to have a hardware state read-out
> > - * infrastructure which reconstructs the full software state (e.g. the i915
> > - * driver).
> > - *
> > - * The simpler solution is to just reset the software state to everything off,
> > - * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
> > - * the atomic helpers provide default reset implementations for all hooks.
> > - *
> > - * On the upside the precise state tracking of atomic simplifies system suspend
> > - * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe
> > - * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume().
> > - * For other drivers the building blocks are split out, see the documentation
> > - * for these functions.
> > - */
> > -
> > -/**
> > - * drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs
> > - * @crtc: drm CRTC
> > - *
> > - * Resets the atomic state for @crtc by freeing the state pointer (which might
> > - * be NULL, e.g. at driver load time) and allocating a new empty state object.
> > - */
> > -void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
> > -{
> > - if (crtc->state)
> > - __drm_atomic_helper_crtc_destroy_state(crtc->state);
> > -
> > - kfree(crtc->state);
> > - crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL);
> > -
> > - if (crtc->state)
> > - crtc->state->crtc = crtc;
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
> > -
> > -/**
> > - * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state
> > - * @crtc: CRTC object
> > - * @state: atomic CRTC state
> > - *
> > - * Copies atomic state from a CRTC's current state and resets inferred values.
> > - * This is useful for drivers that subclass the CRTC state.
> > - */
> > -void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
> > - struct drm_crtc_state *state)
> > -{
> > - memcpy(state, crtc->state, sizeof(*state));
> > -
> > - if (state->mode_blob)
> > - drm_property_blob_get(state->mode_blob);
> > - if (state->degamma_lut)
> > - drm_property_blob_get(state->degamma_lut);
> > - if (state->ctm)
> > - drm_property_blob_get(state->ctm);
> > - if (state->gamma_lut)
> > - drm_property_blob_get(state->gamma_lut);
> > - state->mode_changed = false;
> > - state->active_changed = false;
> > - state->planes_changed = false;
> > - state->connectors_changed = false;
> > - state->color_mgmt_changed = false;
> > - state->zpos_changed = false;
> > - state->commit = NULL;
> > - state->event = NULL;
> > - state->pageflip_flags = 0;
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state);
> > -
> > -/**
> > - * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
> > - * @crtc: drm CRTC
> > - *
> > - * Default CRTC state duplicate hook for drivers which don't have their own
> > - * subclassed CRTC state structure.
> > - */
> > -struct drm_crtc_state *
> > -drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc)
> > -{
> > - struct drm_crtc_state *state;
> > -
> > - if (WARN_ON(!crtc->state))
> > - return NULL;
> > -
> > - state = kmalloc(sizeof(*state), GFP_KERNEL);
> > - if (state)
> > - __drm_atomic_helper_crtc_duplicate_state(crtc, state);
> > -
> > - return state;
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
> > -
> > -/**
> > - * __drm_atomic_helper_crtc_destroy_state - release CRTC state
> > - * @state: CRTC state object to release
> > - *
> > - * Releases all resources stored in the CRTC state without actually freeing
> > - * the memory of the CRTC state. This is useful for drivers that subclass the
> > - * CRTC state.
> > - */
> > -void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state)
> > -{
> > - if (state->commit) {
> > - /*
> > - * In the event that a non-blocking commit returns
> > - * -ERESTARTSYS before the commit_tail work is queued, we will
> > - * have an extra reference to the commit object. Release it, if
> > - * the event has not been consumed by the worker.
> > - *
> > - * state->event may be freed, so we can't directly look at
> > - * state->event->base.completion.
> > - */
> > - if (state->event && state->commit->abort_completion)
> > - drm_crtc_commit_put(state->commit);
> > -
> > - kfree(state->commit->event);
> > - state->commit->event = NULL;
> > -
> > - drm_crtc_commit_put(state->commit);
> > - }
> > -
> > - drm_property_blob_put(state->mode_blob);
> > - drm_property_blob_put(state->degamma_lut);
> > - drm_property_blob_put(state->ctm);
> > - drm_property_blob_put(state->gamma_lut);
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state);
> > -
> > -/**
> > - * drm_atomic_helper_crtc_destroy_state - default state destroy hook
> > - * @crtc: drm CRTC
> > - * @state: CRTC state object to release
> > - *
> > - * Default CRTC state destroy hook for drivers which don't have their own
> > - * subclassed CRTC state structure.
> > - */
> > -void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
> > - struct drm_crtc_state *state)
> > -{
> > - __drm_atomic_helper_crtc_destroy_state(state);
> > - kfree(state);
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
> > -
> > -/**
> > - * __drm_atomic_helper_plane_reset - resets planes state to default values
> > - * @plane: plane object, must not be NULL
> > - * @state: atomic plane state, must not be NULL
> > - *
> > - * Initializes plane state to default. This is useful for drivers that subclass
> > - * the plane state.
> > - */
> > -void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> > - struct drm_plane_state *state)
> > -{
> > - state->plane = plane;
> > - state->rotation = DRM_MODE_ROTATE_0;
> > -
> > - state->alpha = DRM_BLEND_ALPHA_OPAQUE;
> > - state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
> > -
> > - plane->state = state;
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_plane_reset);
> > -
> > -/**
> > - * drm_atomic_helper_plane_reset - default &drm_plane_funcs.reset hook for planes
> > - * @plane: drm plane
> > - *
> > - * Resets the atomic state for @plane by freeing the state pointer (which might
> > - * be NULL, e.g. at driver load time) and allocating a new empty state object.
> > - */
> > -void drm_atomic_helper_plane_reset(struct drm_plane *plane)
> > -{
> > - if (plane->state)
> > - __drm_atomic_helper_plane_destroy_state(plane->state);
> > -
> > - kfree(plane->state);
> > - plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
> > - if (plane->state)
> > - __drm_atomic_helper_plane_reset(plane, plane->state);
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
> > -
> > -/**
> > - * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
> > - * @plane: plane object
> > - * @state: atomic plane state
> > - *
> > - * Copies atomic state from a plane's current state. This is useful for
> > - * drivers that subclass the plane state.
> > - */
> > -void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
> > - struct drm_plane_state *state)
> > -{
> > - memcpy(state, plane->state, sizeof(*state));
> > -
> > - if (state->fb)
> > - drm_framebuffer_get(state->fb);
> > -
> > - state->fence = NULL;
> > - state->commit = NULL;
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
> > -
> > -/**
> > - * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
> > - * @plane: drm plane
> > - *
> > - * Default plane state duplicate hook for drivers which don't have their own
> > - * subclassed plane state structure.
> > - */
> > -struct drm_plane_state *
> > -drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane)
> > -{
> > - struct drm_plane_state *state;
> > -
> > - if (WARN_ON(!plane->state))
> > - return NULL;
> > -
> > - state = kmalloc(sizeof(*state), GFP_KERNEL);
> > - if (state)
> > - __drm_atomic_helper_plane_duplicate_state(plane, state);
> > -
> > - return state;
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
> > -
> > -/**
> > - * __drm_atomic_helper_plane_destroy_state - release plane state
> > - * @state: plane state object to release
> > - *
> > - * Releases all resources stored in the plane state without actually freeing
> > - * the memory of the plane state. This is useful for drivers that subclass the
> > - * plane state.
> > - */
> > -void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
> > -{
> > - if (state->fb)
> > - drm_framebuffer_put(state->fb);
> > -
> > - if (state->fence)
> > - dma_fence_put(state->fence);
> > -
> > - if (state->commit)
> > - drm_crtc_commit_put(state->commit);
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
> > -
> > -/**
> > - * drm_atomic_helper_plane_destroy_state - default state destroy hook
> > - * @plane: drm plane
> > - * @state: plane state object to release
> > - *
> > - * Default plane state destroy hook for drivers which don't have their own
> > - * subclassed plane state structure.
> > - */
> > -void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
> > - struct drm_plane_state *state)
> > -{
> > - __drm_atomic_helper_plane_destroy_state(state);
> > - kfree(state);
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
> > -
> > -/**
> > - * __drm_atomic_helper_connector_reset - reset state on connector
> > - * @connector: drm connector
> > - * @conn_state: connector state to assign
> > - *
> > - * Initializes the newly allocated @conn_state and assigns it to
> > - * the &drm_conector->state pointer of @connector, usually required when
> > - * initializing the drivers or when called from the &drm_connector_funcs.reset
> > - * hook.
> > - *
> > - * This is useful for drivers that subclass the connector state.
> > - */
> > -void
> > -__drm_atomic_helper_connector_reset(struct drm_connector *connector,
> > - struct drm_connector_state *conn_state)
> > -{
> > - if (conn_state)
> > - conn_state->connector = connector;
> > -
> > - connector->state = conn_state;
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_connector_reset);
> > -
> > -/**
> > - * drm_atomic_helper_connector_reset - default &drm_connector_funcs.reset hook for connectors
> > - * @connector: drm connector
> > - *
> > - * Resets the atomic state for @connector by freeing the state pointer (which
> > - * might be NULL, e.g. at driver load time) and allocating a new empty state
> > - * object.
> > - */
> > -void drm_atomic_helper_connector_reset(struct drm_connector *connector)
> > -{
> > - struct drm_connector_state *conn_state =
> > - kzalloc(sizeof(*conn_state), GFP_KERNEL);
> > -
> > - if (connector->state)
> > - __drm_atomic_helper_connector_destroy_state(connector->state);
> > -
> > - kfree(connector->state);
> > - __drm_atomic_helper_connector_reset(connector, conn_state);
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
> > -
> > -/**
> > - * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
> > - * @connector: connector object
> > - * @state: atomic connector state
> > - *
> > - * Copies atomic state from a connector's current state. This is useful for
> > - * drivers that subclass the connector state.
> > - */
> > -void
> > -__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
> > - struct drm_connector_state *state)
> > -{
> > - memcpy(state, connector->state, sizeof(*state));
> > - if (state->crtc)
> > - drm_connector_get(connector);
> > - state->commit = NULL;
> > -
> > - /* Don't copy over a writeback job, they are used only once */
> > - state->writeback_job = NULL;
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
> > -
> > -/**
> > - * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
> > - * @connector: drm connector
> > - *
> > - * Default connector state duplicate hook for drivers which don't have their own
> > - * subclassed connector state structure.
> > - */
> > -struct drm_connector_state *
> > -drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector)
> > -{
> > - struct drm_connector_state *state;
> > -
> > - if (WARN_ON(!connector->state))
> > - return NULL;
> > -
> > - state = kmalloc(sizeof(*state), GFP_KERNEL);
> > - if (state)
> > - __drm_atomic_helper_connector_duplicate_state(connector, state);
> > -
> > - return state;
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
> > -
> > -/**
> > - * drm_atomic_helper_duplicate_state - duplicate an atomic state object
> > - * @dev: DRM device
> > - * @ctx: lock acquisition context
> > - *
> > - * Makes a copy of the current atomic state by looping over all objects and
> > - * duplicating their respective states. This is used for example by suspend/
> > - * resume support code to save the state prior to suspend such that it can
> > - * be restored upon resume.
> > - *
> > - * Note that this treats atomic state as persistent between save and restore.
> > - * Drivers must make sure that this is possible and won't result in confusion
> > - * or erroneous behaviour.
> > - *
> > - * Note that if callers haven't already acquired all modeset locks this might
> > - * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
> > - *
> > - * Returns:
> > - * A pointer to the copy of the atomic state object on success or an
> > - * ERR_PTR()-encoded error code on failure.
> > - *
> > - * See also:
> > - * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
> > - */
> > -struct drm_atomic_state *
> > -drm_atomic_helper_duplicate_state(struct drm_device *dev,
> > - struct drm_modeset_acquire_ctx *ctx)
> > -{
> > - struct drm_atomic_state *state;
> > - struct drm_connector *conn;
> > - struct drm_connector_list_iter conn_iter;
> > - struct drm_plane *plane;
> > - struct drm_crtc *crtc;
> > - int err = 0;
> > -
> > - state = drm_atomic_state_alloc(dev);
> > - if (!state)
> > - return ERR_PTR(-ENOMEM);
> > -
> > - state->acquire_ctx = ctx;
> > -
> > - drm_for_each_crtc(crtc, dev) {
> > - struct drm_crtc_state *crtc_state;
> > -
> > - crtc_state = drm_atomic_get_crtc_state(state, crtc);
> > - if (IS_ERR(crtc_state)) {
> > - err = PTR_ERR(crtc_state);
> > - goto free;
> > - }
> > - }
> > -
> > - drm_for_each_plane(plane, dev) {
> > - struct drm_plane_state *plane_state;
> > -
> > - plane_state = drm_atomic_get_plane_state(state, plane);
> > - if (IS_ERR(plane_state)) {
> > - err = PTR_ERR(plane_state);
> > - goto free;
> > - }
> > - }
> > -
> > - drm_connector_list_iter_begin(dev, &conn_iter);
> > - drm_for_each_connector_iter(conn, &conn_iter) {
> > - struct drm_connector_state *conn_state;
> > -
> > - conn_state = drm_atomic_get_connector_state(state, conn);
> > - if (IS_ERR(conn_state)) {
> > - err = PTR_ERR(conn_state);
> > - drm_connector_list_iter_end(&conn_iter);
> > - goto free;
> > - }
> > - }
> > - drm_connector_list_iter_end(&conn_iter);
> > -
> > - /* clear the acquire context so that it isn't accidentally reused */
> > - state->acquire_ctx = NULL;
> > -
> > -free:
> > - if (err < 0) {
> > - drm_atomic_state_put(state);
> > - state = ERR_PTR(err);
> > - }
> > -
> > - return state;
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_duplicate_state);
> > -
> > -/**
> > - * __drm_atomic_helper_connector_destroy_state - release connector state
> > - * @state: connector state object to release
> > - *
> > - * Releases all resources stored in the connector state without actually
> > - * freeing the memory of the connector state. This is useful for drivers that
> > - * subclass the connector state.
> > - */
> > -void
> > -__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state)
> > -{
> > - if (state->crtc)
> > - drm_connector_put(state->connector);
> > -
> > - if (state->commit)
> > - drm_crtc_commit_put(state->commit);
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);
> > -
> > -/**
> > - * drm_atomic_helper_connector_destroy_state - default state destroy hook
> > - * @connector: drm connector
> > - * @state: connector state object to release
> > - *
> > - * Default connector state destroy hook for drivers which don't have their own
> > - * subclassed connector state structure.
> > - */
> > -void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
> > - struct drm_connector_state *state)
> > -{
> > - __drm_atomic_helper_connector_destroy_state(state);
> > - kfree(state);
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
> > -
> > -/**
> > - * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table
> > - * @crtc: CRTC object
> > - * @red: red correction table
> > - * @green: green correction table
> > - * @blue: green correction table
> > - * @size: size of the tables
> > - * @ctx: lock acquire context
> > - *
> > - * Implements support for legacy gamma correction table for drivers
> > - * that support color management through the DEGAMMA_LUT/GAMMA_LUT
> > - * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for
> > - * how the atomic color management and gamma tables work.
> > - */
> > -int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> > - u16 *red, u16 *green, u16 *blue,
> > - uint32_t size,
> > - struct drm_modeset_acquire_ctx *ctx)
> > -{
> > - struct drm_device *dev = crtc->dev;
> > - struct drm_atomic_state *state;
> > - struct drm_crtc_state *crtc_state;
> > - struct drm_property_blob *blob = NULL;
> > - struct drm_color_lut *blob_data;
> > - int i, ret = 0;
> > - bool replaced;
> > -
> > - state = drm_atomic_state_alloc(crtc->dev);
> > - if (!state)
> > - return -ENOMEM;
> > -
> > - blob = drm_property_create_blob(dev,
> > - sizeof(struct drm_color_lut) * size,
> > - NULL);
> > - if (IS_ERR(blob)) {
> > - ret = PTR_ERR(blob);
> > - blob = NULL;
> > - goto fail;
> > - }
> > -
> > - /* Prepare GAMMA_LUT with the legacy values. */
> > - blob_data = blob->data;
> > - for (i = 0; i < size; i++) {
> > - blob_data[i].red = red[i];
> > - blob_data[i].green = green[i];
> > - blob_data[i].blue = blue[i];
> > - }
> > -
> > - state->acquire_ctx = ctx;
> > - crtc_state = drm_atomic_get_crtc_state(state, crtc);
> > - if (IS_ERR(crtc_state)) {
> > - ret = PTR_ERR(crtc_state);
> > - goto fail;
> > - }
> > -
> > - /* Reset DEGAMMA_LUT and CTM properties. */
> > - replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL);
> > - replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL);
> > - replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob);
> > - crtc_state->color_mgmt_changed |= replaced;
> > -
> > - ret = drm_atomic_commit(state);
> > -
> > -fail:
> > - drm_atomic_state_put(state);
> > - drm_property_blob_put(blob);
> > - return ret;
> > -}
> > -EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);
> > -
> > -/**
> > - * __drm_atomic_helper_private_duplicate_state - copy atomic private state
> > - * @obj: CRTC object
> > - * @state: new private object state
> > - *
> > - * Copies atomic state from a private objects's current state and resets inferred values.
> > - * This is useful for drivers that subclass the private state.
> > - */
> > -void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj *obj,
> > - struct drm_private_state *state)
> > -{
> > - memcpy(state, obj->state, sizeof(*state));
> > -}
> > -EXPORT_SYMBOL(__drm_atomic_helper_private_obj_duplicate_state);
> > diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> > new file mode 100644
> > index 000000000000..3ba996069d69
> > --- /dev/null
> > +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> > @@ -0,0 +1,601 @@
> > +/*
> > + * Copyright (C) 2018 Intel Corp.
> > + *
> > + * Permission is hereby granted, free of charge, to any person obtaining a
> > + * copy of this software and associated documentation files (the "Software"),
> > + * to deal in the Software without restriction, including without limitation
> > + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> > + * and/or sell copies of the Software, and to permit persons to whom the
> > + * Software is furnished to do so, subject to the following conditions:
> > + *
> > + * The above copyright notice and this permission notice shall be included in
> > + * all copies or substantial portions of the Software.
> > + *
> > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> > + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> > + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> > + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> > + * OTHER DEALINGS IN THE SOFTWARE.
> > + *
> > + * Authors:
> > + * Rob Clark <robdclark at gmail.com>
> > + * Daniel Vetter <daniel.vetter at ffwll.ch>
> > + */
> > +
> > +#include <drm/drm_atomic_state_helper.h>
> > +#include <drm/drm_crtc.h>
> > +#include <drm/drm_plane.h>
> > +#include <drm/drm_connector.h>
> > +#include <drm/drm_atomic.h>
> > +#include <drm/drm_device.h>
> > +
> > +#include <linux/slab.h>
> > +#include <linux/dma-fence.h>
> > +
> > +/**
> > + * DOC: atomic state reset and initialization
> > + *
> > + * Both the drm core and the atomic helpers assume that there is always the full
> > + * and correct atomic software state for all connectors, CRTCs and planes
> > + * available. Which is a bit a problem on driver load and also after system
> > + * suspend. One way to solve this is to have a hardware state read-out
> > + * infrastructure which reconstructs the full software state (e.g. the i915
> > + * driver).
> > + *
> > + * The simpler solution is to just reset the software state to everything off,
> > + * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
> > + * the atomic helpers provide default reset implementations for all hooks.
> > + *
> > + * On the upside the precise state tracking of atomic simplifies system suspend
> > + * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe
> > + * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume().
> > + * For other drivers the building blocks are split out, see the documentation
> > + * for these functions.
> > + */
> > +
> > +/**
> > + * drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs
> > + * @crtc: drm CRTC
> > + *
> > + * Resets the atomic state for @crtc by freeing the state pointer (which might
> > + * be NULL, e.g. at driver load time) and allocating a new empty state object.
> > + */
> > +void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
> > +{
> > + if (crtc->state)
> > + __drm_atomic_helper_crtc_destroy_state(crtc->state);
> > +
> > + kfree(crtc->state);
> > + crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL);
> > +
> > + if (crtc->state)
> > + crtc->state->crtc = crtc;
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
> > +
> > +/**
> > + * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state
> > + * @crtc: CRTC object
> > + * @state: atomic CRTC state
> > + *
> > + * Copies atomic state from a CRTC's current state and resets inferred values.
> > + * This is useful for drivers that subclass the CRTC state.
> > + */
> > +void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
> > + struct drm_crtc_state *state)
> > +{
> > + memcpy(state, crtc->state, sizeof(*state));
> > +
> > + if (state->mode_blob)
> > + drm_property_blob_get(state->mode_blob);
> > + if (state->degamma_lut)
> > + drm_property_blob_get(state->degamma_lut);
> > + if (state->ctm)
> > + drm_property_blob_get(state->ctm);
> > + if (state->gamma_lut)
> > + drm_property_blob_get(state->gamma_lut);
> > + state->mode_changed = false;
> > + state->active_changed = false;
> > + state->planes_changed = false;
> > + state->connectors_changed = false;
> > + state->color_mgmt_changed = false;
> > + state->zpos_changed = false;
> > + state->commit = NULL;
> > + state->event = NULL;
> > + state->pageflip_flags = 0;
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state);
> > +
> > +/**
> > + * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
> > + * @crtc: drm CRTC
> > + *
> > + * Default CRTC state duplicate hook for drivers which don't have their own
> > + * subclassed CRTC state structure.
> > + */
> > +struct drm_crtc_state *
> > +drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc)
> > +{
> > + struct drm_crtc_state *state;
> > +
> > + if (WARN_ON(!crtc->state))
> > + return NULL;
> > +
> > + state = kmalloc(sizeof(*state), GFP_KERNEL);
> > + if (state)
> > + __drm_atomic_helper_crtc_duplicate_state(crtc, state);
> > +
> > + return state;
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
> > +
> > +/**
> > + * __drm_atomic_helper_crtc_destroy_state - release CRTC state
> > + * @state: CRTC state object to release
> > + *
> > + * Releases all resources stored in the CRTC state without actually freeing
> > + * the memory of the CRTC state. This is useful for drivers that subclass the
> > + * CRTC state.
> > + */
> > +void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state)
> > +{
> > + if (state->commit) {
> > + /*
> > + * In the event that a non-blocking commit returns
> > + * -ERESTARTSYS before the commit_tail work is queued, we will
> > + * have an extra reference to the commit object. Release it, if
> > + * the event has not been consumed by the worker.
> > + *
> > + * state->event may be freed, so we can't directly look at
> > + * state->event->base.completion.
> > + */
> > + if (state->event && state->commit->abort_completion)
> > + drm_crtc_commit_put(state->commit);
> > +
> > + kfree(state->commit->event);
> > + state->commit->event = NULL;
> > +
> > + drm_crtc_commit_put(state->commit);
> > + }
> > +
> > + drm_property_blob_put(state->mode_blob);
> > + drm_property_blob_put(state->degamma_lut);
> > + drm_property_blob_put(state->ctm);
> > + drm_property_blob_put(state->gamma_lut);
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state);
> > +
> > +/**
> > + * drm_atomic_helper_crtc_destroy_state - default state destroy hook
> > + * @crtc: drm CRTC
> > + * @state: CRTC state object to release
> > + *
> > + * Default CRTC state destroy hook for drivers which don't have their own
> > + * subclassed CRTC state structure.
> > + */
> > +void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
> > + struct drm_crtc_state *state)
> > +{
> > + __drm_atomic_helper_crtc_destroy_state(state);
> > + kfree(state);
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
> > +
> > +/**
> > + * __drm_atomic_helper_plane_reset - resets planes state to default values
> > + * @plane: plane object, must not be NULL
> > + * @state: atomic plane state, must not be NULL
> > + *
> > + * Initializes plane state to default. This is useful for drivers that subclass
> > + * the plane state.
> > + */
> > +void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> > + struct drm_plane_state *state)
> > +{
> > + state->plane = plane;
> > + state->rotation = DRM_MODE_ROTATE_0;
> > +
> > + state->alpha = DRM_BLEND_ALPHA_OPAQUE;
> > + state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
> > +
> > + plane->state = state;
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_plane_reset);
> > +
> > +/**
> > + * drm_atomic_helper_plane_reset - default &drm_plane_funcs.reset hook for planes
> > + * @plane: drm plane
> > + *
> > + * Resets the atomic state for @plane by freeing the state pointer (which might
> > + * be NULL, e.g. at driver load time) and allocating a new empty state object.
> > + */
> > +void drm_atomic_helper_plane_reset(struct drm_plane *plane)
> > +{
> > + if (plane->state)
> > + __drm_atomic_helper_plane_destroy_state(plane->state);
> > +
> > + kfree(plane->state);
> > + plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
> > + if (plane->state)
> > + __drm_atomic_helper_plane_reset(plane, plane->state);
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
> > +
> > +/**
> > + * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
> > + * @plane: plane object
> > + * @state: atomic plane state
> > + *
> > + * Copies atomic state from a plane's current state. This is useful for
> > + * drivers that subclass the plane state.
> > + */
> > +void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
> > + struct drm_plane_state *state)
> > +{
> > + memcpy(state, plane->state, sizeof(*state));
> > +
> > + if (state->fb)
> > + drm_framebuffer_get(state->fb);
> > +
> > + state->fence = NULL;
> > + state->commit = NULL;
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
> > +
> > +/**
> > + * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
> > + * @plane: drm plane
> > + *
> > + * Default plane state duplicate hook for drivers which don't have their own
> > + * subclassed plane state structure.
> > + */
> > +struct drm_plane_state *
> > +drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane)
> > +{
> > + struct drm_plane_state *state;
> > +
> > + if (WARN_ON(!plane->state))
> > + return NULL;
> > +
> > + state = kmalloc(sizeof(*state), GFP_KERNEL);
> > + if (state)
> > + __drm_atomic_helper_plane_duplicate_state(plane, state);
> > +
> > + return state;
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
> > +
> > +/**
> > + * __drm_atomic_helper_plane_destroy_state - release plane state
> > + * @state: plane state object to release
> > + *
> > + * Releases all resources stored in the plane state without actually freeing
> > + * the memory of the plane state. This is useful for drivers that subclass the
> > + * plane state.
> > + */
> > +void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
> > +{
> > + if (state->fb)
> > + drm_framebuffer_put(state->fb);
> > +
> > + if (state->fence)
> > + dma_fence_put(state->fence);
> > +
> > + if (state->commit)
> > + drm_crtc_commit_put(state->commit);
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
> > +
> > +/**
> > + * drm_atomic_helper_plane_destroy_state - default state destroy hook
> > + * @plane: drm plane
> > + * @state: plane state object to release
> > + *
> > + * Default plane state destroy hook for drivers which don't have their own
> > + * subclassed plane state structure.
> > + */
> > +void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
> > + struct drm_plane_state *state)
> > +{
> > + __drm_atomic_helper_plane_destroy_state(state);
> > + kfree(state);
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
> > +
> > +/**
> > + * __drm_atomic_helper_connector_reset - reset state on connector
> > + * @connector: drm connector
> > + * @conn_state: connector state to assign
> > + *
> > + * Initializes the newly allocated @conn_state and assigns it to
> > + * the &drm_conector->state pointer of @connector, usually required when
> > + * initializing the drivers or when called from the &drm_connector_funcs.reset
> > + * hook.
> > + *
> > + * This is useful for drivers that subclass the connector state.
> > + */
> > +void
> > +__drm_atomic_helper_connector_reset(struct drm_connector *connector,
> > + struct drm_connector_state *conn_state)
> > +{
> > + if (conn_state)
> > + conn_state->connector = connector;
> > +
> > + connector->state = conn_state;
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_connector_reset);
> > +
> > +/**
> > + * drm_atomic_helper_connector_reset - default &drm_connector_funcs.reset hook for connectors
> > + * @connector: drm connector
> > + *
> > + * Resets the atomic state for @connector by freeing the state pointer (which
> > + * might be NULL, e.g. at driver load time) and allocating a new empty state
> > + * object.
> > + */
> > +void drm_atomic_helper_connector_reset(struct drm_connector *connector)
> > +{
> > + struct drm_connector_state *conn_state =
> > + kzalloc(sizeof(*conn_state), GFP_KERNEL);
> > +
> > + if (connector->state)
> > + __drm_atomic_helper_connector_destroy_state(connector->state);
> > +
> > + kfree(connector->state);
> > + __drm_atomic_helper_connector_reset(connector, conn_state);
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
> > +
> > +/**
> > + * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
> > + * @connector: connector object
> > + * @state: atomic connector state
> > + *
> > + * Copies atomic state from a connector's current state. This is useful for
> > + * drivers that subclass the connector state.
> > + */
> > +void
> > +__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
> > + struct drm_connector_state *state)
> > +{
> > + memcpy(state, connector->state, sizeof(*state));
> > + if (state->crtc)
> > + drm_connector_get(connector);
> > + state->commit = NULL;
> > +
> > + /* Don't copy over a writeback job, they are used only once */
> > + state->writeback_job = NULL;
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
> > +
> > +/**
> > + * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
> > + * @connector: drm connector
> > + *
> > + * Default connector state duplicate hook for drivers which don't have their own
> > + * subclassed connector state structure.
> > + */
> > +struct drm_connector_state *
> > +drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector)
> > +{
> > + struct drm_connector_state *state;
> > +
> > + if (WARN_ON(!connector->state))
> > + return NULL;
> > +
> > + state = kmalloc(sizeof(*state), GFP_KERNEL);
> > + if (state)
> > + __drm_atomic_helper_connector_duplicate_state(connector, state);
> > +
> > + return state;
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
> > +
> > +/**
> > + * drm_atomic_helper_duplicate_state - duplicate an atomic state object
> > + * @dev: DRM device
> > + * @ctx: lock acquisition context
> > + *
> > + * Makes a copy of the current atomic state by looping over all objects and
> > + * duplicating their respective states. This is used for example by suspend/
> > + * resume support code to save the state prior to suspend such that it can
> > + * be restored upon resume.
> > + *
> > + * Note that this treats atomic state as persistent between save and restore.
> > + * Drivers must make sure that this is possible and won't result in confusion
> > + * or erroneous behaviour.
> > + *
> > + * Note that if callers haven't already acquired all modeset locks this might
> > + * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
> > + *
> > + * Returns:
> > + * A pointer to the copy of the atomic state object on success or an
> > + * ERR_PTR()-encoded error code on failure.
> > + *
> > + * See also:
> > + * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
> > + */
> > +struct drm_atomic_state *
> > +drm_atomic_helper_duplicate_state(struct drm_device *dev,
> > + struct drm_modeset_acquire_ctx *ctx)
> > +{
> > + struct drm_atomic_state *state;
> > + struct drm_connector *conn;
> > + struct drm_connector_list_iter conn_iter;
> > + struct drm_plane *plane;
> > + struct drm_crtc *crtc;
> > + int err = 0;
> > +
> > + state = drm_atomic_state_alloc(dev);
> > + if (!state)
> > + return ERR_PTR(-ENOMEM);
> > +
> > + state->acquire_ctx = ctx;
> > +
> > + drm_for_each_crtc(crtc, dev) {
> > + struct drm_crtc_state *crtc_state;
> > +
> > + crtc_state = drm_atomic_get_crtc_state(state, crtc);
> > + if (IS_ERR(crtc_state)) {
> > + err = PTR_ERR(crtc_state);
> > + goto free;
> > + }
> > + }
> > +
> > + drm_for_each_plane(plane, dev) {
> > + struct drm_plane_state *plane_state;
> > +
> > + plane_state = drm_atomic_get_plane_state(state, plane);
> > + if (IS_ERR(plane_state)) {
> > + err = PTR_ERR(plane_state);
> > + goto free;
> > + }
> > + }
> > +
> > + drm_connector_list_iter_begin(dev, &conn_iter);
> > + drm_for_each_connector_iter(conn, &conn_iter) {
> > + struct drm_connector_state *conn_state;
> > +
> > + conn_state = drm_atomic_get_connector_state(state, conn);
> > + if (IS_ERR(conn_state)) {
> > + err = PTR_ERR(conn_state);
> > + drm_connector_list_iter_end(&conn_iter);
> > + goto free;
> > + }
> > + }
> > + drm_connector_list_iter_end(&conn_iter);
> > +
> > + /* clear the acquire context so that it isn't accidentally reused */
> > + state->acquire_ctx = NULL;
> > +
> > +free:
> > + if (err < 0) {
> > + drm_atomic_state_put(state);
> > + state = ERR_PTR(err);
> > + }
> > +
> > + return state;
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_duplicate_state);
> > +
> > +/**
> > + * __drm_atomic_helper_connector_destroy_state - release connector state
> > + * @state: connector state object to release
> > + *
> > + * Releases all resources stored in the connector state without actually
> > + * freeing the memory of the connector state. This is useful for drivers that
> > + * subclass the connector state.
> > + */
> > +void
> > +__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state)
> > +{
> > + if (state->crtc)
> > + drm_connector_put(state->connector);
> > +
> > + if (state->commit)
> > + drm_crtc_commit_put(state->commit);
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);
> > +
> > +/**
> > + * drm_atomic_helper_connector_destroy_state - default state destroy hook
> > + * @connector: drm connector
> > + * @state: connector state object to release
> > + *
> > + * Default connector state destroy hook for drivers which don't have their own
> > + * subclassed connector state structure.
> > + */
> > +void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
> > + struct drm_connector_state *state)
> > +{
> > + __drm_atomic_helper_connector_destroy_state(state);
> > + kfree(state);
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
> > +
> > +/**
> > + * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table
> > + * @crtc: CRTC object
> > + * @red: red correction table
> > + * @green: green correction table
> > + * @blue: green correction table
> > + * @size: size of the tables
> > + * @ctx: lock acquire context
> > + *
> > + * Implements support for legacy gamma correction table for drivers
> > + * that support color management through the DEGAMMA_LUT/GAMMA_LUT
> > + * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for
> > + * how the atomic color management and gamma tables work.
> > + */
> > +int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> > + u16 *red, u16 *green, u16 *blue,
> > + uint32_t size,
> > + struct drm_modeset_acquire_ctx *ctx)
> > +{
> > + struct drm_device *dev = crtc->dev;
> > + struct drm_atomic_state *state;
> > + struct drm_crtc_state *crtc_state;
> > + struct drm_property_blob *blob = NULL;
> > + struct drm_color_lut *blob_data;
> > + int i, ret = 0;
> > + bool replaced;
> > +
> > + state = drm_atomic_state_alloc(crtc->dev);
> > + if (!state)
> > + return -ENOMEM;
> > +
> > + blob = drm_property_create_blob(dev,
> > + sizeof(struct drm_color_lut) * size,
> > + NULL);
> > + if (IS_ERR(blob)) {
> > + ret = PTR_ERR(blob);
> > + blob = NULL;
> > + goto fail;
> > + }
> > +
> > + /* Prepare GAMMA_LUT with the legacy values. */
> > + blob_data = blob->data;
> > + for (i = 0; i < size; i++) {
> > + blob_data[i].red = red[i];
> > + blob_data[i].green = green[i];
> > + blob_data[i].blue = blue[i];
> > + }
> > +
> > + state->acquire_ctx = ctx;
> > + crtc_state = drm_atomic_get_crtc_state(state, crtc);
> > + if (IS_ERR(crtc_state)) {
> > + ret = PTR_ERR(crtc_state);
> > + goto fail;
> > + }
> > +
> > + /* Reset DEGAMMA_LUT and CTM properties. */
> > + replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL);
> > + replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL);
> > + replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob);
> > + crtc_state->color_mgmt_changed |= replaced;
> > +
> > + ret = drm_atomic_commit(state);
> > +
> > +fail:
> > + drm_atomic_state_put(state);
> > + drm_property_blob_put(blob);
> > + return ret;
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);
> > +
> > +/**
> > + * __drm_atomic_helper_private_duplicate_state - copy atomic private state
> > + * @obj: CRTC object
> > + * @state: new private object state
> > + *
> > + * Copies atomic state from a private objects's current state and resets inferred values.
> > + * This is useful for drivers that subclass the private state.
> > + */
> > +void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj *obj,
> > + struct drm_private_state *state)
> > +{
> > + memcpy(state, obj->state, sizeof(*state));
> > +}
> > +EXPORT_SYMBOL(__drm_atomic_helper_private_obj_duplicate_state);
> > diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
> > index e60c4f0f8827..25ca0097563e 100644
> > --- a/include/drm/drm_atomic_helper.h
> > +++ b/include/drm/drm_atomic_helper.h
> > @@ -31,6 +31,7 @@
> > #include <drm/drm_crtc.h>
> > #include <drm/drm_modeset_helper_vtables.h>
> > #include <drm/drm_modeset_helper.h>
> > +#include <drm/drm_atomic_state_helper.h>
> > #include <drm/drm_util.h>
> >
> > struct drm_atomic_state;
> > @@ -145,49 +146,6 @@ int drm_atomic_helper_page_flip_target(
> > uint32_t target,
> > struct drm_modeset_acquire_ctx *ctx);
> >
> > -/* default implementations for state handling */
> > -void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
> > -void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
> > - struct drm_crtc_state *state);
> > -struct drm_crtc_state *
> > -drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
> > -void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
> > -void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
> > - struct drm_crtc_state *state);
> > -
> > -void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> > - struct drm_plane_state *state);
> > -void drm_atomic_helper_plane_reset(struct drm_plane *plane);
> > -void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
> > - struct drm_plane_state *state);
> > -struct drm_plane_state *
> > -drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
> > -void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state);
> > -void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
> > - struct drm_plane_state *state);
> > -
> > -void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
> > - struct drm_connector_state *conn_state);
> > -void drm_atomic_helper_connector_reset(struct drm_connector *connector);
> > -void
> > -__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
> > - struct drm_connector_state *state);
> > -struct drm_connector_state *
> > -drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
> > -struct drm_atomic_state *
> > -drm_atomic_helper_duplicate_state(struct drm_device *dev,
> > - struct drm_modeset_acquire_ctx *ctx);
> > -void
> > -__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
> > -void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
> > - struct drm_connector_state *state);
> > -int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> > - u16 *red, u16 *green, u16 *blue,
> > - uint32_t size,
> > - struct drm_modeset_acquire_ctx *ctx);
> > -void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj *obj,
> > - struct drm_private_state *state);
> > -
> > /**
> > * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
> > * @plane: the loop cursor
> > diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
> > new file mode 100644
> > index 000000000000..5b82ccfdb502
> > --- /dev/null
> > +++ b/include/drm/drm_atomic_state_helper.h
> > @@ -0,0 +1,80 @@
> > +/*
> > + * Copyright (C) 2018 Intel Corp.
> > + *
> > + * Permission is hereby granted, free of charge, to any person obtaining a
> > + * copy of this software and associated documentation files (the "Software"),
> > + * to deal in the Software without restriction, including without limitation
> > + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> > + * and/or sell copies of the Software, and to permit persons to whom the
> > + * Software is furnished to do so, subject to the following conditions:
> > + *
> > + * The above copyright notice and this permission notice shall be included in
> > + * all copies or substantial portions of the Software.
> > + *
> > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> > + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> > + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> > + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> > + * OTHER DEALINGS IN THE SOFTWARE.
> > + *
> > + * Authors:
> > + * Rob Clark <robdclark at gmail.com>
> > + * Daniel Vetter <daniel.vetter at ffwll.ch>
> > + */
> > +
> > +#include <linux/types.h>
> > +
> > +struct drm_crtc;
> > +struct drm_crtc_state;
> > +struct drm_plane;
> > +struct drm_plane_state;
> > +struct drm_connector;
> > +struct drm_connector_state;
> > +struct drm_private_obj;
> > +struct drm_private_state;
> > +struct drm_modeset_acquire_ctx;
> > +struct drm_device;
> > +
> > +void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
> > +void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
> > + struct drm_crtc_state *state);
> > +struct drm_crtc_state *
> > +drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
> > +void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
> > +void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
> > + struct drm_crtc_state *state);
> > +
> > +void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> > + struct drm_plane_state *state);
> > +void drm_atomic_helper_plane_reset(struct drm_plane *plane);
> > +void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
> > + struct drm_plane_state *state);
> > +struct drm_plane_state *
> > +drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
> > +void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state);
> > +void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
> > + struct drm_plane_state *state);
> > +
> > +void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
> > + struct drm_connector_state *conn_state);
> > +void drm_atomic_helper_connector_reset(struct drm_connector *connector);
> > +void
> > +__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
> > + struct drm_connector_state *state);
> > +struct drm_connector_state *
> > +drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
> > +struct drm_atomic_state *
> > +drm_atomic_helper_duplicate_state(struct drm_device *dev,
> > + struct drm_modeset_acquire_ctx *ctx);
> > +void
> > +__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
> > +void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
> > + struct drm_connector_state *state);
> > +int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
> > + u16 *red, u16 *green, u16 *blue,
> > + uint32_t size,
> > + struct drm_modeset_acquire_ctx *ctx);
> > +void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj *obj,
> > + struct drm_private_state *state);
> > --
> > 2.19.0.rc2
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Ville Syrjälä
> Intel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
More information about the Intel-gfx
mailing list