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drm: Extract drm_atomic_state_helper.[hc]

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We already have a separate overview doc for this, makes sense to
untangle it from the overall atomic helpers.

v2: Rebase

v3: Rebase more.

Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181004202446.22905-4-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2018-10-04 22:24:28 +02:00
parent 297e30b5d9
commit 9ef8a9dc4b
6 changed files with 699 additions and 616 deletions
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21
Documentation/gpu/drm-kms-helpers.rst
View File

@ -59,12 +59,6 @@ Implementing Asynchronous Atomic Commit
.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
:doc: implementing nonblocking commit
Atomic State Reset and Initialization
-------------------------------------
.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
:doc: atomic state reset and initialization
Helper Functions Reference
--------------------------
@ -74,6 +68,21 @@ Helper Functions Reference
.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
:export:
Atomic State Reset and Initialization
-------------------------------------
.. kernel-doc:: drivers/gpu/drm/drm_atomic_state_helper.c
:doc: atomic state reset and initialization
Atomic State Helper Reference
-----------------------------
.. kernel-doc:: include/drm/drm_atomic_state_helper.h
:internal:
.. kernel-doc:: drivers/gpu/drm/drm_atomic_state_helper.c
:export:
Simple KMS Helper Reference
===========================

3
drivers/gpu/drm/Makefile
View File

@ -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

566
drivers/gpu/drm/drm_atomic_helper.c
View File

@ -3399,569 +3399,3 @@ fail:
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);

601
drivers/gpu/drm/drm_atomic_state_helper.c Normal file
View File

@ -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@gmail.com>
* Daniel Vetter <daniel.vetter@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);

44
include/drm/drm_atomic_helper.h
View File

@ -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

80
include/drm/drm_atomic_state_helper.h Normal file
View File

@ -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@gmail.com>
* Daniel Vetter <daniel.vetter@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);