0,0 → 1,2540 |
/* |
* Copyright (C) 2014 Red Hat |
* Copyright (C) 2014 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/drmP.h> |
#include <drm/drm_atomic.h> |
#include <drm/drm_plane_helper.h> |
#include <drm/drm_crtc_helper.h> |
#include <drm/drm_atomic_helper.h> |
#include <linux/fence.h> |
|
/** |
* DOC: overview |
* |
* This helper library provides implementations of check and commit functions on |
* top of the CRTC modeset helper callbacks and the plane helper callbacks. It |
* also provides convenience implementations for the atomic state handling |
* callbacks for drivers which don't need to subclass the drm core structures to |
* add their own additional internal state. |
* |
* This library also provides default implementations for the check callback in |
* drm_atomic_helper_check() and for the commit callback with |
* drm_atomic_helper_commit(). But the individual stages and callbacks are |
* exposed to allow drivers to mix and match and e.g. use the plane helpers only |
* together with a driver private modeset implementation. |
* |
* This library also provides implementations for all the legacy driver |
* interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
* drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the |
* various functions to implement set_property callbacks. New drivers must not |
* implement these functions themselves but must use the provided helpers. |
*/ |
static void |
drm_atomic_helper_plane_changed(struct drm_atomic_state *state, |
struct drm_plane_state *plane_state, |
struct drm_plane *plane) |
{ |
struct drm_crtc_state *crtc_state; |
|
if (plane->state->crtc) { |
crtc_state = state->crtc_states[drm_crtc_index(plane->state->crtc)]; |
|
if (WARN_ON(!crtc_state)) |
return; |
|
crtc_state->planes_changed = true; |
} |
|
if (plane_state->crtc) { |
crtc_state = |
state->crtc_states[drm_crtc_index(plane_state->crtc)]; |
|
if (WARN_ON(!crtc_state)) |
return; |
|
crtc_state->planes_changed = true; |
} |
} |
|
static struct drm_crtc * |
get_current_crtc_for_encoder(struct drm_device *dev, |
struct drm_encoder *encoder) |
{ |
struct drm_mode_config *config = &dev->mode_config; |
struct drm_connector *connector; |
|
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); |
|
drm_for_each_connector(connector, dev) { |
if (connector->state->best_encoder != encoder) |
continue; |
|
return connector->state->crtc; |
} |
|
return NULL; |
} |
|
static int |
steal_encoder(struct drm_atomic_state *state, |
struct drm_encoder *encoder, |
struct drm_crtc *encoder_crtc) |
{ |
struct drm_mode_config *config = &state->dev->mode_config; |
struct drm_crtc_state *crtc_state; |
struct drm_connector *connector; |
struct drm_connector_state *connector_state; |
int ret; |
|
/* |
* We can only steal an encoder coming from a connector, which means we |
* must already hold the connection_mutex. |
*/ |
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); |
|
DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", |
encoder->base.id, encoder->name, |
encoder_crtc->base.id); |
|
crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); |
if (IS_ERR(crtc_state)) |
return PTR_ERR(crtc_state); |
|
crtc_state->connectors_changed = true; |
|
list_for_each_entry(connector, &config->connector_list, head) { |
if (connector->state->best_encoder != encoder) |
continue; |
|
DRM_DEBUG_ATOMIC("Stealing encoder from [CONNECTOR:%d:%s]\n", |
connector->base.id, |
connector->name); |
|
connector_state = drm_atomic_get_connector_state(state, |
connector); |
if (IS_ERR(connector_state)) |
return PTR_ERR(connector_state); |
|
ret = drm_atomic_set_crtc_for_connector(connector_state, NULL); |
if (ret) |
return ret; |
connector_state->best_encoder = NULL; |
} |
|
return 0; |
} |
|
static int |
update_connector_routing(struct drm_atomic_state *state, int conn_idx) |
{ |
const struct drm_connector_helper_funcs *funcs; |
struct drm_encoder *new_encoder; |
struct drm_crtc *encoder_crtc; |
struct drm_connector *connector; |
struct drm_connector_state *connector_state; |
struct drm_crtc_state *crtc_state; |
int idx, ret; |
|
connector = state->connectors[conn_idx]; |
connector_state = state->connector_states[conn_idx]; |
|
if (!connector) |
return 0; |
|
DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
connector->base.id, |
connector->name); |
|
if (connector->state->crtc != connector_state->crtc) { |
if (connector->state->crtc) { |
idx = drm_crtc_index(connector->state->crtc); |
|
crtc_state = state->crtc_states[idx]; |
crtc_state->connectors_changed = true; |
} |
|
if (connector_state->crtc) { |
idx = drm_crtc_index(connector_state->crtc); |
|
crtc_state = state->crtc_states[idx]; |
crtc_state->connectors_changed = true; |
} |
} |
|
if (!connector_state->crtc) { |
DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
connector->base.id, |
connector->name); |
|
connector_state->best_encoder = NULL; |
|
return 0; |
} |
|
funcs = connector->helper_private; |
|
if (funcs->atomic_best_encoder) |
new_encoder = funcs->atomic_best_encoder(connector, |
connector_state); |
else |
new_encoder = funcs->best_encoder(connector); |
|
if (!new_encoder) { |
DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
connector->base.id, |
connector->name); |
return -EINVAL; |
} |
|
if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", |
new_encoder->base.id, |
new_encoder->name, |
connector_state->crtc->base.id); |
return -EINVAL; |
} |
|
if (new_encoder == connector_state->best_encoder) { |
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", |
connector->base.id, |
connector->name, |
new_encoder->base.id, |
new_encoder->name, |
connector_state->crtc->base.id); |
|
return 0; |
} |
|
encoder_crtc = get_current_crtc_for_encoder(state->dev, |
new_encoder); |
|
if (encoder_crtc) { |
ret = steal_encoder(state, new_encoder, encoder_crtc); |
if (ret) { |
DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n", |
connector->base.id, |
connector->name); |
return ret; |
} |
} |
|
if (WARN_ON(!connector_state->crtc)) |
return -EINVAL; |
|
connector_state->best_encoder = new_encoder; |
idx = drm_crtc_index(connector_state->crtc); |
|
crtc_state = state->crtc_states[idx]; |
crtc_state->connectors_changed = true; |
|
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", |
connector->base.id, |
connector->name, |
new_encoder->base.id, |
new_encoder->name, |
connector_state->crtc->base.id); |
|
return 0; |
} |
|
static int |
mode_fixup(struct drm_atomic_state *state) |
{ |
struct drm_crtc *crtc; |
struct drm_crtc_state *crtc_state; |
struct drm_connector *connector; |
struct drm_connector_state *conn_state; |
int i; |
bool ret; |
|
for_each_crtc_in_state(state, crtc, crtc_state, i) { |
if (!crtc_state->mode_changed && |
!crtc_state->connectors_changed) |
continue; |
|
drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); |
} |
|
for_each_connector_in_state(state, connector, conn_state, i) { |
const struct drm_encoder_helper_funcs *funcs; |
struct drm_encoder *encoder; |
|
WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
|
if (!conn_state->crtc || !conn_state->best_encoder) |
continue; |
|
crtc_state = |
state->crtc_states[drm_crtc_index(conn_state->crtc)]; |
|
/* |
* Each encoder has at most one connector (since we always steal |
* it away), so we won't call ->mode_fixup twice. |
*/ |
encoder = conn_state->best_encoder; |
funcs = encoder->helper_private; |
if (!funcs) |
continue; |
|
ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
&crtc_state->adjusted_mode); |
if (!ret) { |
DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); |
return -EINVAL; |
} |
|
if (funcs->atomic_check) { |
ret = funcs->atomic_check(encoder, crtc_state, |
conn_state); |
if (ret) { |
DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
encoder->base.id, encoder->name); |
return ret; |
} |
} else if (funcs->mode_fixup) { |
ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
&crtc_state->adjusted_mode); |
if (!ret) { |
DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
encoder->base.id, encoder->name); |
return -EINVAL; |
} |
} |
} |
|
for_each_crtc_in_state(state, crtc, crtc_state, i) { |
const struct drm_crtc_helper_funcs *funcs; |
|
if (!crtc_state->mode_changed && |
!crtc_state->connectors_changed) |
continue; |
|
funcs = crtc->helper_private; |
if (!funcs->mode_fixup) |
continue; |
|
ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
&crtc_state->adjusted_mode); |
if (!ret) { |
DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n", |
crtc->base.id); |
return -EINVAL; |
} |
} |
|
return 0; |
} |
|
/** |
* drm_atomic_helper_check_modeset - validate state object for modeset changes |
* @dev: DRM device |
* @state: the driver state object |
* |
* Check the state object to see if the requested state is physically possible. |
* This does all the crtc and connector related computations for an atomic |
* update and adds any additional connectors needed for full modesets and calls |
* down into ->mode_fixup functions of the driver backend. |
* |
* crtc_state->mode_changed is set when the input mode is changed. |
* crtc_state->connectors_changed is set when a connector is added or |
* removed from the crtc. |
* crtc_state->active_changed is set when crtc_state->active changes, |
* which is used for dpms. |
* |
* IMPORTANT: |
* |
* Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a |
* plane update can't be done without a full modeset) _must_ call this function |
* afterwards after that change. It is permitted to call this function multiple |
* times for the same update, e.g. when the ->atomic_check functions depend upon |
* the adjusted dotclock for fifo space allocation and watermark computation. |
* |
* RETURNS |
* Zero for success or -errno |
*/ |
int |
drm_atomic_helper_check_modeset(struct drm_device *dev, |
struct drm_atomic_state *state) |
{ |
struct drm_crtc *crtc; |
struct drm_crtc_state *crtc_state; |
struct drm_connector *connector; |
struct drm_connector_state *connector_state; |
int i, ret; |
|
for_each_crtc_in_state(state, crtc, crtc_state, i) { |
if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n", |
crtc->base.id); |
crtc_state->mode_changed = true; |
} |
|
if (crtc->state->enable != crtc_state->enable) { |
DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n", |
crtc->base.id); |
|
/* |
* For clarity this assignment is done here, but |
* enable == 0 is only true when there are no |
* connectors and a NULL mode. |
* |
* The other way around is true as well. enable != 0 |
* iff connectors are attached and a mode is set. |
*/ |
crtc_state->mode_changed = true; |
crtc_state->connectors_changed = true; |
} |
} |
|
for_each_connector_in_state(state, connector, connector_state, i) { |
/* |
* This only sets crtc->mode_changed for routing changes, |
* drivers must set crtc->mode_changed themselves when connector |
* properties need to be updated. |
*/ |
ret = update_connector_routing(state, i); |
if (ret) |
return ret; |
} |
|
/* |
* After all the routing has been prepared we need to add in any |
* connector which is itself unchanged, but who's crtc changes it's |
* configuration. This must be done before calling mode_fixup in case a |
* crtc only changed its mode but has the same set of connectors. |
*/ |
for_each_crtc_in_state(state, crtc, crtc_state, i) { |
int num_connectors; |
|
/* |
* We must set ->active_changed after walking connectors for |
* otherwise an update that only changes active would result in |
* a full modeset because update_connector_routing force that. |
*/ |
if (crtc->state->active != crtc_state->active) { |
DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n", |
crtc->base.id); |
crtc_state->active_changed = true; |
} |
|
if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
continue; |
|
DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", |
crtc->base.id, |
crtc_state->enable ? 'y' : 'n', |
crtc_state->active ? 'y' : 'n'); |
|
ret = drm_atomic_add_affected_connectors(state, crtc); |
if (ret != 0) |
return ret; |
|
ret = drm_atomic_add_affected_planes(state, crtc); |
if (ret != 0) |
return ret; |
|
num_connectors = drm_atomic_connectors_for_crtc(state, |
crtc); |
|
if (crtc_state->enable != !!num_connectors) { |
DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n", |
crtc->base.id); |
|
return -EINVAL; |
} |
} |
|
return mode_fixup(state); |
} |
EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
|
/** |
* drm_atomic_helper_check_planes - validate state object for planes changes |
* @dev: DRM device |
* @state: the driver state object |
* |
* Check the state object to see if the requested state is physically possible. |
* This does all the plane update related checks using by calling into the |
* ->atomic_check hooks provided by the driver. |
* |
* It also sets crtc_state->planes_changed to indicate that a crtc has |
* updated planes. |
* |
* RETURNS |
* Zero for success or -errno |
*/ |
int |
drm_atomic_helper_check_planes(struct drm_device *dev, |
struct drm_atomic_state *state) |
{ |
struct drm_crtc *crtc; |
struct drm_crtc_state *crtc_state; |
struct drm_plane *plane; |
struct drm_plane_state *plane_state; |
int i, ret = 0; |
|
for_each_plane_in_state(state, plane, plane_state, i) { |
const struct drm_plane_helper_funcs *funcs; |
|
funcs = plane->helper_private; |
|
drm_atomic_helper_plane_changed(state, plane_state, plane); |
|
if (!funcs || !funcs->atomic_check) |
continue; |
|
ret = funcs->atomic_check(plane, plane_state); |
if (ret) { |
DRM_DEBUG_ATOMIC("[PLANE:%d] atomic driver check failed\n", |
plane->base.id); |
return ret; |
} |
} |
|
for_each_crtc_in_state(state, crtc, crtc_state, i) { |
const struct drm_crtc_helper_funcs *funcs; |
|
funcs = crtc->helper_private; |
|
if (!funcs || !funcs->atomic_check) |
continue; |
|
ret = funcs->atomic_check(crtc, state->crtc_states[i]); |
if (ret) { |
DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n", |
crtc->base.id); |
return ret; |
} |
} |
|
return ret; |
} |
EXPORT_SYMBOL(drm_atomic_helper_check_planes); |
|
/** |
* drm_atomic_helper_check - validate state object |
* @dev: DRM device |
* @state: the driver state object |
* |
* Check the state object to see if the requested state is physically possible. |
* Only crtcs and planes have check callbacks, so for any additional (global) |
* checking that a driver needs it can simply wrap that around this function. |
* Drivers without such needs can directly use this as their ->atomic_check() |
* callback. |
* |
* This just wraps the two parts of the state checking for planes and modeset |
* state in the default order: First it calls drm_atomic_helper_check_modeset() |
* and then drm_atomic_helper_check_planes(). The assumption is that the |
* ->atomic_check functions depend upon an updated adjusted_mode.clock to |
* e.g. properly compute watermarks. |
* |
* RETURNS |
* Zero for success or -errno |
*/ |
int drm_atomic_helper_check(struct drm_device *dev, |
struct drm_atomic_state *state) |
{ |
int ret; |
|
ret = drm_atomic_helper_check_modeset(dev, state); |
if (ret) |
return ret; |
|
ret = drm_atomic_helper_check_planes(dev, state); |
if (ret) |
return ret; |
|
return ret; |
} |
EXPORT_SYMBOL(drm_atomic_helper_check); |
|
static void |
disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) |
{ |
struct drm_connector *connector; |
struct drm_connector_state *old_conn_state; |
struct drm_crtc *crtc; |
struct drm_crtc_state *old_crtc_state; |
int i; |
|
for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
const struct drm_encoder_helper_funcs *funcs; |
struct drm_encoder *encoder; |
struct drm_crtc_state *old_crtc_state; |
|
/* Shut down everything that's in the changeset and currently |
* still on. So need to check the old, saved state. */ |
if (!old_conn_state->crtc) |
continue; |
|
old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
|
if (!old_crtc_state->active || |
!drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
continue; |
|
encoder = old_conn_state->best_encoder; |
|
/* We shouldn't get this far if we didn't previously have |
* an encoder.. but WARN_ON() rather than explode. |
*/ |
if (WARN_ON(!encoder)) |
continue; |
|
funcs = encoder->helper_private; |
|
DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
encoder->base.id, encoder->name); |
|
/* |
* Each encoder has at most one connector (since we always steal |
* it away), so we won't call disable hooks twice. |
*/ |
drm_bridge_disable(encoder->bridge); |
|
/* Right function depends upon target state. */ |
if (connector->state->crtc && funcs->prepare) |
funcs->prepare(encoder); |
else if (funcs->disable) |
funcs->disable(encoder); |
else |
funcs->dpms(encoder, DRM_MODE_DPMS_OFF); |
|
drm_bridge_post_disable(encoder->bridge); |
} |
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
const struct drm_crtc_helper_funcs *funcs; |
|
/* Shut down everything that needs a full modeset. */ |
if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
continue; |
|
if (!old_crtc_state->active) |
continue; |
|
funcs = crtc->helper_private; |
|
DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n", |
crtc->base.id); |
|
|
/* Right function depends upon target state. */ |
if (crtc->state->enable && funcs->prepare) |
funcs->prepare(crtc); |
else if (funcs->disable) |
funcs->disable(crtc); |
else |
funcs->dpms(crtc, DRM_MODE_DPMS_OFF); |
} |
} |
|
/** |
* drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state |
* @dev: DRM device |
* @old_state: atomic state object with old state structures |
* |
* This function updates all the various legacy modeset state pointers in |
* connectors, encoders and crtcs. It also updates the timestamping constants |
* used for precise vblank timestamps by calling |
* drm_calc_timestamping_constants(). |
* |
* Drivers can use this for building their own atomic commit if they don't have |
* a pure helper-based modeset implementation. |
*/ |
void |
drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, |
struct drm_atomic_state *old_state) |
{ |
struct drm_connector *connector; |
struct drm_connector_state *old_conn_state; |
struct drm_crtc *crtc; |
struct drm_crtc_state *old_crtc_state; |
int i; |
|
/* clear out existing links and update dpms */ |
for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
if (connector->encoder) { |
WARN_ON(!connector->encoder->crtc); |
|
connector->encoder->crtc = NULL; |
connector->encoder = NULL; |
} |
|
crtc = connector->state->crtc; |
if ((!crtc && old_conn_state->crtc) || |
(crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { |
struct drm_property *dpms_prop = |
dev->mode_config.dpms_property; |
int mode = DRM_MODE_DPMS_OFF; |
|
if (crtc && crtc->state->active) |
mode = DRM_MODE_DPMS_ON; |
|
connector->dpms = mode; |
drm_object_property_set_value(&connector->base, |
dpms_prop, mode); |
} |
} |
|
/* set new links */ |
for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
if (!connector->state->crtc) |
continue; |
|
if (WARN_ON(!connector->state->best_encoder)) |
continue; |
|
connector->encoder = connector->state->best_encoder; |
connector->encoder->crtc = connector->state->crtc; |
} |
|
/* set legacy state in the crtc structure */ |
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
struct drm_plane *primary = crtc->primary; |
|
crtc->mode = crtc->state->mode; |
crtc->enabled = crtc->state->enable; |
|
if (drm_atomic_get_existing_plane_state(old_state, primary) && |
primary->state->crtc == crtc) { |
crtc->x = primary->state->src_x >> 16; |
crtc->y = primary->state->src_y >> 16; |
} |
|
if (crtc->state->enable) |
drm_calc_timestamping_constants(crtc, |
&crtc->state->adjusted_mode); |
} |
} |
EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
|
static void |
crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) |
{ |
struct drm_crtc *crtc; |
struct drm_crtc_state *old_crtc_state; |
struct drm_connector *connector; |
struct drm_connector_state *old_conn_state; |
int i; |
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
const struct drm_crtc_helper_funcs *funcs; |
|
if (!crtc->state->mode_changed) |
continue; |
|
funcs = crtc->helper_private; |
|
if (crtc->state->enable && funcs->mode_set_nofb) { |
DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n", |
crtc->base.id); |
|
funcs->mode_set_nofb(crtc); |
} |
} |
|
for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
const struct drm_encoder_helper_funcs *funcs; |
struct drm_crtc_state *new_crtc_state; |
struct drm_encoder *encoder; |
struct drm_display_mode *mode, *adjusted_mode; |
|
if (!connector->state->best_encoder) |
continue; |
|
encoder = connector->state->best_encoder; |
funcs = encoder->helper_private; |
new_crtc_state = connector->state->crtc->state; |
mode = &new_crtc_state->mode; |
adjusted_mode = &new_crtc_state->adjusted_mode; |
|
if (!new_crtc_state->mode_changed) |
continue; |
|
DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
encoder->base.id, encoder->name); |
|
/* |
* Each encoder has at most one connector (since we always steal |
* it away), so we won't call mode_set hooks twice. |
*/ |
if (funcs->mode_set) |
funcs->mode_set(encoder, mode, adjusted_mode); |
|
drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
} |
} |
|
/** |
* drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
* @dev: DRM device |
* @old_state: atomic state object with old state structures |
* |
* This function shuts down all the outputs that need to be shut down and |
* prepares them (if required) with the new mode. |
* |
* For compatibility with legacy crtc helpers this should be called before |
* drm_atomic_helper_commit_planes(), which is what the default commit function |
* does. But drivers with different needs can group the modeset commits together |
* and do the plane commits at the end. This is useful for drivers doing runtime |
* PM since planes updates then only happen when the CRTC is actually enabled. |
*/ |
void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
struct drm_atomic_state *old_state) |
{ |
disable_outputs(dev, old_state); |
|
drm_atomic_helper_update_legacy_modeset_state(dev, old_state); |
|
crtc_set_mode(dev, old_state); |
} |
EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
|
/** |
* drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
* @dev: DRM device |
* @old_state: atomic state object with old state structures |
* |
* This function enables all the outputs with the new configuration which had to |
* be turned off for the update. |
* |
* For compatibility with legacy crtc helpers this should be called after |
* drm_atomic_helper_commit_planes(), which is what the default commit function |
* does. But drivers with different needs can group the modeset commits together |
* and do the plane commits at the end. This is useful for drivers doing runtime |
* PM since planes updates then only happen when the CRTC is actually enabled. |
*/ |
void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
struct drm_atomic_state *old_state) |
{ |
struct drm_crtc *crtc; |
struct drm_crtc_state *old_crtc_state; |
struct drm_connector *connector; |
struct drm_connector_state *old_conn_state; |
int i; |
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
const struct drm_crtc_helper_funcs *funcs; |
|
/* Need to filter out CRTCs where only planes change. */ |
if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
continue; |
|
if (!crtc->state->active) |
continue; |
|
funcs = crtc->helper_private; |
|
if (crtc->state->enable) { |
DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n", |
crtc->base.id); |
|
if (funcs->enable) |
funcs->enable(crtc); |
else |
funcs->commit(crtc); |
} |
} |
|
for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
const struct drm_encoder_helper_funcs *funcs; |
struct drm_encoder *encoder; |
|
if (!connector->state->best_encoder) |
continue; |
|
if (!connector->state->crtc->state->active || |
!drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
continue; |
|
encoder = connector->state->best_encoder; |
funcs = encoder->helper_private; |
|
DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
encoder->base.id, encoder->name); |
|
/* |
* Each encoder has at most one connector (since we always steal |
* it away), so we won't call enable hooks twice. |
*/ |
drm_bridge_pre_enable(encoder->bridge); |
|
if (funcs->enable) |
funcs->enable(encoder); |
else |
funcs->commit(encoder); |
|
drm_bridge_enable(encoder->bridge); |
} |
} |
EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
|
static void wait_for_fences(struct drm_device *dev, |
struct drm_atomic_state *state) |
{ |
struct drm_plane *plane; |
struct drm_plane_state *plane_state; |
int i; |
|
for_each_plane_in_state(state, plane, plane_state, i) { |
if (!plane->state->fence) |
continue; |
|
WARN_ON(!plane->state->fb); |
|
fence_wait(plane->state->fence, false); |
fence_put(plane->state->fence); |
plane->state->fence = NULL; |
} |
} |
|
static bool framebuffer_changed(struct drm_device *dev, |
struct drm_atomic_state *old_state, |
struct drm_crtc *crtc) |
{ |
struct drm_plane *plane; |
struct drm_plane_state *old_plane_state; |
int i; |
|
for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
if (plane->state->crtc != crtc && |
old_plane_state->crtc != crtc) |
continue; |
|
if (plane->state->fb != old_plane_state->fb) |
return true; |
} |
|
return false; |
} |
|
/** |
* drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs |
* @dev: DRM device |
* @old_state: atomic state object with old state structures |
* |
* Helper to, after atomic commit, wait for vblanks on all effected |
* crtcs (ie. before cleaning up old framebuffers using |
* drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
* framebuffers have actually changed to optimize for the legacy cursor and |
* plane update use-case. |
*/ |
void |
drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, |
struct drm_atomic_state *old_state) |
{ |
struct drm_crtc *crtc; |
struct drm_crtc_state *old_crtc_state; |
int i, ret; |
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
/* No one cares about the old state, so abuse it for tracking |
* and store whether we hold a vblank reference (and should do a |
* vblank wait) in the ->enable boolean. */ |
old_crtc_state->enable = false; |
|
if (!crtc->state->enable) |
continue; |
|
/* Legacy cursor ioctls are completely unsynced, and userspace |
* relies on that (by doing tons of cursor updates). */ |
if (old_state->legacy_cursor_update) |
continue; |
|
if (!framebuffer_changed(dev, old_state, crtc)) |
continue; |
|
ret = drm_crtc_vblank_get(crtc); |
if (ret != 0) |
continue; |
|
old_crtc_state->enable = true; |
old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
} |
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
if (!old_crtc_state->enable) |
continue; |
|
ret = wait_event_timeout(dev->vblank[i].queue, |
old_crtc_state->last_vblank_count != |
drm_crtc_vblank_count(crtc), |
msecs_to_jiffies(50)); |
|
drm_crtc_vblank_put(crtc); |
} |
} |
EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
|
/** |
* drm_atomic_helper_commit - commit validated state object |
* @dev: DRM device |
* @state: the driver state object |
* @async: asynchronous commit |
* |
* This function commits a with drm_atomic_helper_check() pre-validated state |
* object. This can still fail when e.g. the framebuffer reservation fails. For |
* now this doesn't implement asynchronous commits. |
* |
* Note that right now this function does not support async commits, and hence |
* driver writers must implement their own version for now. Also note that the |
* default ordering of how the various stages are called is to match the legacy |
* modeset helper library closest. One peculiarity of that is that it doesn't |
* mesh well with runtime PM at all. |
* |
* For drivers supporting runtime PM the recommended sequence is |
* |
* drm_atomic_helper_commit_modeset_disables(dev, state); |
* |
* drm_atomic_helper_commit_modeset_enables(dev, state); |
* |
* drm_atomic_helper_commit_planes(dev, state, true); |
* |
* See the kerneldoc entries for these three functions for more details. |
* |
* RETURNS |
* Zero for success or -errno. |
*/ |
int drm_atomic_helper_commit(struct drm_device *dev, |
struct drm_atomic_state *state, |
bool async) |
{ |
int ret; |
|
if (async) |
return -EBUSY; |
|
ret = drm_atomic_helper_prepare_planes(dev, state); |
if (ret) |
return ret; |
|
/* |
* This is the point of no return - everything below never fails except |
* when the hw goes bonghits. Which means we can commit the new state on |
* the software side now. |
*/ |
|
drm_atomic_helper_swap_state(dev, state); |
|
/* |
* Everything below can be run asynchronously without the need to grab |
* any modeset locks at all under one condition: It must be guaranteed |
* that the asynchronous work has either been cancelled (if the driver |
* supports it, which at least requires that the framebuffers get |
* cleaned up with drm_atomic_helper_cleanup_planes()) or completed |
* before the new state gets committed on the software side with |
* drm_atomic_helper_swap_state(). |
* |
* This scheme allows new atomic state updates to be prepared and |
* checked in parallel to the asynchronous completion of the previous |
* update. Which is important since compositors need to figure out the |
* composition of the next frame right after having submitted the |
* current layout. |
*/ |
|
wait_for_fences(dev, state); |
|
drm_atomic_helper_commit_modeset_disables(dev, state); |
|
drm_atomic_helper_commit_planes(dev, state, false); |
|
drm_atomic_helper_commit_modeset_enables(dev, state); |
|
// drm_atomic_helper_wait_for_vblanks(dev, state); |
|
drm_atomic_helper_cleanup_planes(dev, state); |
|
drm_atomic_state_free(state); |
|
return 0; |
} |
EXPORT_SYMBOL(drm_atomic_helper_commit); |
|
/** |
* DOC: implementing async commit |
* |
* For now the atomic helpers don't support async commit directly. If there is |
* real need it could be added though, using the dma-buf fence infrastructure |
* for generic synchronization with outstanding rendering. |
* |
* For now drivers have to implement async commit themselves, with the following |
* sequence being the recommended one: |
* |
* 1. Run drm_atomic_helper_prepare_planes() first. This is the only function |
* which commit needs to call which can fail, so we want to run it first and |
* synchronously. |
* |
* 2. Synchronize with any outstanding asynchronous commit worker threads which |
* might be affected the new state update. This can be done by either cancelling |
* or flushing the work items, depending upon whether the driver can deal with |
* cancelled updates. Note that it is important to ensure that the framebuffer |
* cleanup is still done when cancelling. |
* |
* For sufficient parallelism it is recommended to have a work item per crtc |
* (for updates which don't touch global state) and a global one. Then we only |
* need to synchronize with the crtc work items for changed crtcs and the global |
* work item, which allows nice concurrent updates on disjoint sets of crtcs. |
* |
* 3. The software state is updated synchronously with |
* drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
* locks means concurrent callers never see inconsistent state. And doing this |
* while it's guaranteed that no relevant async worker runs means that async |
* workers do not need grab any locks. Actually they must not grab locks, for |
* otherwise the work flushing will deadlock. |
* |
* 4. Schedule a work item to do all subsequent steps, using the split-out |
* commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and |
* then cleaning up the framebuffers after the old framebuffer is no longer |
* being displayed. |
*/ |
|
/** |
* drm_atomic_helper_prepare_planes - prepare plane resources before commit |
* @dev: DRM device |
* @state: atomic state object with new state structures |
* |
* This function prepares plane state, specifically framebuffers, for the new |
* configuration. If any failure is encountered this function will call |
* ->cleanup_fb on any already successfully prepared framebuffer. |
* |
* Returns: |
* 0 on success, negative error code on failure. |
*/ |
int drm_atomic_helper_prepare_planes(struct drm_device *dev, |
struct drm_atomic_state *state) |
{ |
int nplanes = dev->mode_config.num_total_plane; |
int ret, i; |
|
for (i = 0; i < nplanes; i++) { |
const struct drm_plane_helper_funcs *funcs; |
struct drm_plane *plane = state->planes[i]; |
struct drm_plane_state *plane_state = state->plane_states[i]; |
|
if (!plane) |
continue; |
|
funcs = plane->helper_private; |
|
if (funcs->prepare_fb) { |
ret = funcs->prepare_fb(plane, plane_state); |
if (ret) |
goto fail; |
} |
} |
|
return 0; |
|
fail: |
for (i--; i >= 0; i--) { |
const struct drm_plane_helper_funcs *funcs; |
struct drm_plane *plane = state->planes[i]; |
struct drm_plane_state *plane_state = state->plane_states[i]; |
|
if (!plane) |
continue; |
|
funcs = plane->helper_private; |
|
if (funcs->cleanup_fb) |
funcs->cleanup_fb(plane, plane_state); |
|
} |
|
return ret; |
} |
EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); |
|
bool plane_crtc_active(struct drm_plane_state *state) |
{ |
return state->crtc && state->crtc->state->active; |
} |
|
/** |
* drm_atomic_helper_commit_planes - commit plane state |
* @dev: DRM device |
* @old_state: atomic state object with old state structures |
* @active_only: Only commit on active CRTC if set |
* |
* This function commits the new plane state using the plane and atomic helper |
* functions for planes and crtcs. It assumes that the atomic state has already |
* been pushed into the relevant object state pointers, since this step can no |
* longer fail. |
* |
* It still requires the global state object @old_state to know which planes and |
* crtcs need to be updated though. |
* |
* Note that this function does all plane updates across all CRTCs in one step. |
* If the hardware can't support this approach look at |
* drm_atomic_helper_commit_planes_on_crtc() instead. |
* |
* Plane parameters can be updated by applications while the associated CRTC is |
* disabled. The DRM/KMS core will store the parameters in the plane state, |
* which will be available to the driver when the CRTC is turned on. As a result |
* most drivers don't need to be immediately notified of plane updates for a |
* disabled CRTC. |
* |
* Unless otherwise needed, drivers are advised to set the @active_only |
* parameters to true in order not to receive plane update notifications related |
* to a disabled CRTC. This avoids the need to manually ignore plane updates in |
* driver code when the driver and/or hardware can't or just don't need to deal |
* with updates on disabled CRTCs, for example when supporting runtime PM. |
* |
* The drm_atomic_helper_commit() default implementation only sets @active_only |
* to false to most closely match the behaviour of the legacy helpers. This should |
* not be copied blindly by drivers. |
*/ |
void drm_atomic_helper_commit_planes(struct drm_device *dev, |
struct drm_atomic_state *old_state, |
bool active_only) |
{ |
struct drm_crtc *crtc; |
struct drm_crtc_state *old_crtc_state; |
struct drm_plane *plane; |
struct drm_plane_state *old_plane_state; |
int i; |
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
const struct drm_crtc_helper_funcs *funcs; |
|
funcs = crtc->helper_private; |
|
if (!funcs || !funcs->atomic_begin) |
continue; |
|
if (active_only && !crtc->state->active) |
continue; |
|
funcs->atomic_begin(crtc, old_crtc_state); |
} |
|
for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
const struct drm_plane_helper_funcs *funcs; |
bool disabling; |
|
funcs = plane->helper_private; |
|
if (!funcs) |
continue; |
|
disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
|
if (active_only) { |
/* |
* Skip planes related to inactive CRTCs. If the plane |
* is enabled use the state of the current CRTC. If the |
* plane is being disabled use the state of the old |
* CRTC to avoid skipping planes being disabled on an |
* active CRTC. |
*/ |
if (!disabling && !plane_crtc_active(plane->state)) |
continue; |
if (disabling && !plane_crtc_active(old_plane_state)) |
continue; |
} |
|
/* |
* Special-case disabling the plane if drivers support it. |
*/ |
if (disabling && funcs->atomic_disable) |
funcs->atomic_disable(plane, old_plane_state); |
else if (plane->state->crtc || disabling) |
funcs->atomic_update(plane, old_plane_state); |
} |
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
const struct drm_crtc_helper_funcs *funcs; |
|
funcs = crtc->helper_private; |
|
if (!funcs || !funcs->atomic_flush) |
continue; |
|
if (active_only && !crtc->state->active) |
continue; |
|
funcs->atomic_flush(crtc, old_crtc_state); |
} |
} |
EXPORT_SYMBOL(drm_atomic_helper_commit_planes); |
|
/** |
* drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc |
* @old_crtc_state: atomic state object with the old crtc state |
* |
* This function commits the new plane state using the plane and atomic helper |
* functions for planes on the specific crtc. It assumes that the atomic state |
* has already been pushed into the relevant object state pointers, since this |
* step can no longer fail. |
* |
* This function is useful when plane updates should be done crtc-by-crtc |
* instead of one global step like drm_atomic_helper_commit_planes() does. |
* |
* This function can only be savely used when planes are not allowed to move |
* between different CRTCs because this function doesn't handle inter-CRTC |
* depencies. Callers need to ensure that either no such depencies exist, |
* resolve them through ordering of commit calls or through some other means. |
*/ |
void |
drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) |
{ |
const struct drm_crtc_helper_funcs *crtc_funcs; |
struct drm_crtc *crtc = old_crtc_state->crtc; |
struct drm_atomic_state *old_state = old_crtc_state->state; |
struct drm_plane *plane; |
unsigned plane_mask; |
|
plane_mask = old_crtc_state->plane_mask; |
plane_mask |= crtc->state->plane_mask; |
|
crtc_funcs = crtc->helper_private; |
if (crtc_funcs && crtc_funcs->atomic_begin) |
crtc_funcs->atomic_begin(crtc, old_crtc_state); |
|
drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { |
struct drm_plane_state *old_plane_state = |
drm_atomic_get_existing_plane_state(old_state, plane); |
const struct drm_plane_helper_funcs *plane_funcs; |
|
plane_funcs = plane->helper_private; |
|
if (!old_plane_state || !plane_funcs) |
continue; |
|
WARN_ON(plane->state->crtc && plane->state->crtc != crtc); |
|
if (drm_atomic_plane_disabling(plane, old_plane_state) && |
plane_funcs->atomic_disable) |
plane_funcs->atomic_disable(plane, old_plane_state); |
else if (plane->state->crtc || |
drm_atomic_plane_disabling(plane, old_plane_state)) |
plane_funcs->atomic_update(plane, old_plane_state); |
} |
|
if (crtc_funcs && crtc_funcs->atomic_flush) |
crtc_funcs->atomic_flush(crtc, old_crtc_state); |
} |
EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); |
|
/** |
* drm_atomic_helper_cleanup_planes - cleanup plane resources after commit |
* @dev: DRM device |
* @old_state: atomic state object with old state structures |
* |
* This function cleans up plane state, specifically framebuffers, from the old |
* configuration. Hence the old configuration must be perserved in @old_state to |
* be able to call this function. |
* |
* This function must also be called on the new state when the atomic update |
* fails at any point after calling drm_atomic_helper_prepare_planes(). |
*/ |
void drm_atomic_helper_cleanup_planes(struct drm_device *dev, |
struct drm_atomic_state *old_state) |
{ |
struct drm_plane *plane; |
struct drm_plane_state *plane_state; |
int i; |
|
for_each_plane_in_state(old_state, plane, plane_state, i) { |
const struct drm_plane_helper_funcs *funcs; |
|
funcs = plane->helper_private; |
|
if (funcs->cleanup_fb) |
funcs->cleanup_fb(plane, plane_state); |
} |
} |
EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); |
|
/** |
* drm_atomic_helper_swap_state - store atomic state into current sw state |
* @dev: DRM device |
* @state: atomic state |
* |
* This function stores the atomic state into the current state pointers in all |
* driver objects. It should be called after all failing steps have been done |
* and succeeded, but before the actual hardware state is committed. |
* |
* For cleanup and error recovery the current state for all changed objects will |
* be swaped into @state. |
* |
* With that sequence it fits perfectly into the plane prepare/cleanup sequence: |
* |
* 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. |
* |
* 2. Do any other steps that might fail. |
* |
* 3. Put the staged state into the current state pointers with this function. |
* |
* 4. Actually commit the hardware state. |
* |
* 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
* contains the old state. Also do any other cleanup required with that state. |
*/ |
void drm_atomic_helper_swap_state(struct drm_device *dev, |
struct drm_atomic_state *state) |
{ |
int i; |
|
for (i = 0; i < dev->mode_config.num_connector; i++) { |
struct drm_connector *connector = state->connectors[i]; |
|
if (!connector) |
continue; |
|
connector->state->state = state; |
swap(state->connector_states[i], connector->state); |
connector->state->state = NULL; |
} |
|
for (i = 0; i < dev->mode_config.num_crtc; i++) { |
struct drm_crtc *crtc = state->crtcs[i]; |
|
if (!crtc) |
continue; |
|
crtc->state->state = state; |
swap(state->crtc_states[i], crtc->state); |
crtc->state->state = NULL; |
} |
|
for (i = 0; i < dev->mode_config.num_total_plane; i++) { |
struct drm_plane *plane = state->planes[i]; |
|
if (!plane) |
continue; |
|
plane->state->state = state; |
swap(state->plane_states[i], plane->state); |
plane->state->state = NULL; |
} |
} |
EXPORT_SYMBOL(drm_atomic_helper_swap_state); |
|
/** |
* drm_atomic_helper_update_plane - Helper for primary plane update using atomic |
* @plane: plane object to update |
* @crtc: owning CRTC of owning plane |
* @fb: framebuffer to flip onto plane |
* @crtc_x: x offset of primary plane on crtc |
* @crtc_y: y offset of primary plane on crtc |
* @crtc_w: width of primary plane rectangle on crtc |
* @crtc_h: height of primary plane rectangle on crtc |
* @src_x: x offset of @fb for panning |
* @src_y: y offset of @fb for panning |
* @src_w: width of source rectangle in @fb |
* @src_h: height of source rectangle in @fb |
* |
* Provides a default plane update handler using the atomic driver interface. |
* |
* RETURNS: |
* Zero on success, error code on failure |
*/ |
int drm_atomic_helper_update_plane(struct drm_plane *plane, |
struct drm_crtc *crtc, |
struct drm_framebuffer *fb, |
int crtc_x, int crtc_y, |
unsigned int crtc_w, unsigned int crtc_h, |
uint32_t src_x, uint32_t src_y, |
uint32_t src_w, uint32_t src_h) |
{ |
struct drm_atomic_state *state; |
struct drm_plane_state *plane_state; |
int ret = 0; |
|
state = drm_atomic_state_alloc(plane->dev); |
if (!state) |
return -ENOMEM; |
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
retry: |
plane_state = drm_atomic_get_plane_state(state, plane); |
if (IS_ERR(plane_state)) { |
ret = PTR_ERR(plane_state); |
goto fail; |
} |
|
ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
if (ret != 0) |
goto fail; |
drm_atomic_set_fb_for_plane(plane_state, fb); |
plane_state->crtc_x = crtc_x; |
plane_state->crtc_y = crtc_y; |
plane_state->crtc_h = crtc_h; |
plane_state->crtc_w = crtc_w; |
plane_state->src_x = src_x; |
plane_state->src_y = src_y; |
plane_state->src_h = src_h; |
plane_state->src_w = src_w; |
|
if (plane == crtc->cursor) |
state->legacy_cursor_update = true; |
|
ret = drm_atomic_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
/* |
* Someone might have exchanged the framebuffer while we dropped locks |
* in the backoff code. We need to fix up the fb refcount tracking the |
* core does for us. |
*/ |
plane->old_fb = plane->fb; |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_update_plane); |
|
/** |
* drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic |
* @plane: plane to disable |
* |
* Provides a default plane disable handler using the atomic driver interface. |
* |
* RETURNS: |
* Zero on success, error code on failure |
*/ |
int drm_atomic_helper_disable_plane(struct drm_plane *plane) |
{ |
struct drm_atomic_state *state; |
struct drm_plane_state *plane_state; |
int ret = 0; |
|
/* |
* FIXME: Without plane->crtc set we can't get at the implicit legacy |
* acquire context. The real fix will be to wire the acquire ctx through |
* everywhere we need it, but meanwhile prevent chaos by just skipping |
* this noop. The critical case is the cursor ioctls which a) only grab |
* crtc/cursor-plane locks (so we need the crtc to get at the right |
* acquire context) and b) can try to disable the plane multiple times. |
*/ |
if (!plane->crtc) |
return 0; |
|
state = drm_atomic_state_alloc(plane->dev); |
if (!state) |
return -ENOMEM; |
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); |
retry: |
plane_state = drm_atomic_get_plane_state(state, plane); |
if (IS_ERR(plane_state)) { |
ret = PTR_ERR(plane_state); |
goto fail; |
} |
|
if (plane_state->crtc && (plane == plane->crtc->cursor)) |
plane_state->state->legacy_cursor_update = true; |
|
ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
if (ret != 0) |
goto fail; |
|
ret = drm_atomic_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
/* |
* Someone might have exchanged the framebuffer while we dropped locks |
* in the backoff code. We need to fix up the fb refcount tracking the |
* core does for us. |
*/ |
plane->old_fb = plane->fb; |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_disable_plane); |
|
/* just used from fb-helper and atomic-helper: */ |
int __drm_atomic_helper_disable_plane(struct drm_plane *plane, |
struct drm_plane_state *plane_state) |
{ |
int ret; |
|
ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
if (ret != 0) |
return ret; |
|
drm_atomic_set_fb_for_plane(plane_state, NULL); |
plane_state->crtc_x = 0; |
plane_state->crtc_y = 0; |
plane_state->crtc_h = 0; |
plane_state->crtc_w = 0; |
plane_state->src_x = 0; |
plane_state->src_y = 0; |
plane_state->src_h = 0; |
plane_state->src_w = 0; |
|
return 0; |
} |
|
static int update_output_state(struct drm_atomic_state *state, |
struct drm_mode_set *set) |
{ |
struct drm_device *dev = set->crtc->dev; |
struct drm_crtc *crtc; |
struct drm_crtc_state *crtc_state; |
struct drm_connector *connector; |
struct drm_connector_state *conn_state; |
int ret, i, j; |
|
ret = drm_modeset_lock(&dev->mode_config.connection_mutex, |
state->acquire_ctx); |
if (ret) |
return ret; |
|
/* First grab all affected connector/crtc states. */ |
for (i = 0; i < set->num_connectors; i++) { |
conn_state = drm_atomic_get_connector_state(state, |
set->connectors[i]); |
if (IS_ERR(conn_state)) |
return PTR_ERR(conn_state); |
} |
|
for_each_crtc_in_state(state, crtc, crtc_state, i) { |
ret = drm_atomic_add_affected_connectors(state, crtc); |
if (ret) |
return ret; |
} |
|
/* Then recompute connector->crtc links and crtc enabling state. */ |
for_each_connector_in_state(state, connector, conn_state, i) { |
if (conn_state->crtc == set->crtc) { |
ret = drm_atomic_set_crtc_for_connector(conn_state, |
NULL); |
if (ret) |
return ret; |
} |
|
for (j = 0; j < set->num_connectors; j++) { |
if (set->connectors[j] == connector) { |
ret = drm_atomic_set_crtc_for_connector(conn_state, |
set->crtc); |
if (ret) |
return ret; |
break; |
} |
} |
} |
|
for_each_crtc_in_state(state, crtc, crtc_state, i) { |
/* Don't update ->enable for the CRTC in the set_config request, |
* since a mismatch would indicate a bug in the upper layers. |
* The actual modeset code later on will catch any |
* inconsistencies here. */ |
if (crtc == set->crtc) |
continue; |
|
if (!drm_atomic_connectors_for_crtc(state, crtc)) { |
ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
NULL); |
if (ret < 0) |
return ret; |
|
crtc_state->active = false; |
} |
} |
|
return 0; |
} |
|
/** |
* drm_atomic_helper_set_config - set a new config from userspace |
* @set: mode set configuration |
* |
* Provides a default crtc set_config handler using the atomic driver interface. |
* |
* Returns: |
* Returns 0 on success, negative errno numbers on failure. |
*/ |
int drm_atomic_helper_set_config(struct drm_mode_set *set) |
{ |
struct drm_atomic_state *state; |
struct drm_crtc *crtc = set->crtc; |
int ret = 0; |
|
state = drm_atomic_state_alloc(crtc->dev); |
if (!state) |
return -ENOMEM; |
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
retry: |
ret = __drm_atomic_helper_set_config(set, state); |
if (ret != 0) |
goto fail; |
|
ret = drm_atomic_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
/* |
* Someone might have exchanged the framebuffer while we dropped locks |
* in the backoff code. We need to fix up the fb refcount tracking the |
* core does for us. |
*/ |
crtc->primary->old_fb = crtc->primary->fb; |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_set_config); |
|
/* just used from fb-helper and atomic-helper: */ |
int __drm_atomic_helper_set_config(struct drm_mode_set *set, |
struct drm_atomic_state *state) |
{ |
struct drm_crtc_state *crtc_state; |
struct drm_plane_state *primary_state; |
struct drm_crtc *crtc = set->crtc; |
int hdisplay, vdisplay; |
int ret; |
|
crtc_state = drm_atomic_get_crtc_state(state, crtc); |
if (IS_ERR(crtc_state)) |
return PTR_ERR(crtc_state); |
|
primary_state = drm_atomic_get_plane_state(state, crtc->primary); |
if (IS_ERR(primary_state)) |
return PTR_ERR(primary_state); |
|
if (!set->mode) { |
WARN_ON(set->fb); |
WARN_ON(set->num_connectors); |
|
ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
if (ret != 0) |
return ret; |
|
crtc_state->active = false; |
|
ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
if (ret != 0) |
return ret; |
|
drm_atomic_set_fb_for_plane(primary_state, NULL); |
|
goto commit; |
} |
|
WARN_ON(!set->fb); |
WARN_ON(!set->num_connectors); |
|
ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
if (ret != 0) |
return ret; |
|
crtc_state->active = true; |
|
ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
if (ret != 0) |
return ret; |
|
drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
|
drm_atomic_set_fb_for_plane(primary_state, set->fb); |
primary_state->crtc_x = 0; |
primary_state->crtc_y = 0; |
primary_state->crtc_h = vdisplay; |
primary_state->crtc_w = hdisplay; |
primary_state->src_x = set->x << 16; |
primary_state->src_y = set->y << 16; |
if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { |
primary_state->src_h = hdisplay << 16; |
primary_state->src_w = vdisplay << 16; |
} else { |
primary_state->src_h = vdisplay << 16; |
primary_state->src_w = hdisplay << 16; |
} |
|
commit: |
ret = update_output_state(state, set); |
if (ret) |
return ret; |
|
return 0; |
} |
|
/** |
* drm_atomic_helper_crtc_set_property - helper for crtc properties |
* @crtc: DRM crtc |
* @property: DRM property |
* @val: value of property |
* |
* Provides a default crtc set_property handler using the atomic driver |
* interface. |
* |
* RETURNS: |
* Zero on success, error code on failure |
*/ |
int |
drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, |
struct drm_property *property, |
uint64_t val) |
{ |
struct drm_atomic_state *state; |
struct drm_crtc_state *crtc_state; |
int ret = 0; |
|
state = drm_atomic_state_alloc(crtc->dev); |
if (!state) |
return -ENOMEM; |
|
/* ->set_property is always called with all locks held. */ |
state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; |
retry: |
crtc_state = drm_atomic_get_crtc_state(state, crtc); |
if (IS_ERR(crtc_state)) { |
ret = PTR_ERR(crtc_state); |
goto fail; |
} |
|
ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
property, val); |
if (ret) |
goto fail; |
|
ret = drm_atomic_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); |
|
/** |
* drm_atomic_helper_plane_set_property - helper for plane properties |
* @plane: DRM plane |
* @property: DRM property |
* @val: value of property |
* |
* Provides a default plane set_property handler using the atomic driver |
* interface. |
* |
* RETURNS: |
* Zero on success, error code on failure |
*/ |
int |
drm_atomic_helper_plane_set_property(struct drm_plane *plane, |
struct drm_property *property, |
uint64_t val) |
{ |
struct drm_atomic_state *state; |
struct drm_plane_state *plane_state; |
int ret = 0; |
|
state = drm_atomic_state_alloc(plane->dev); |
if (!state) |
return -ENOMEM; |
|
/* ->set_property is always called with all locks held. */ |
state->acquire_ctx = plane->dev->mode_config.acquire_ctx; |
retry: |
plane_state = drm_atomic_get_plane_state(state, plane); |
if (IS_ERR(plane_state)) { |
ret = PTR_ERR(plane_state); |
goto fail; |
} |
|
ret = drm_atomic_plane_set_property(plane, plane_state, |
property, val); |
if (ret) |
goto fail; |
|
ret = drm_atomic_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); |
|
/** |
* drm_atomic_helper_connector_set_property - helper for connector properties |
* @connector: DRM connector |
* @property: DRM property |
* @val: value of property |
* |
* Provides a default connector set_property handler using the atomic driver |
* interface. |
* |
* RETURNS: |
* Zero on success, error code on failure |
*/ |
int |
drm_atomic_helper_connector_set_property(struct drm_connector *connector, |
struct drm_property *property, |
uint64_t val) |
{ |
struct drm_atomic_state *state; |
struct drm_connector_state *connector_state; |
int ret = 0; |
|
state = drm_atomic_state_alloc(connector->dev); |
if (!state) |
return -ENOMEM; |
|
/* ->set_property is always called with all locks held. */ |
state->acquire_ctx = connector->dev->mode_config.acquire_ctx; |
retry: |
connector_state = drm_atomic_get_connector_state(state, connector); |
if (IS_ERR(connector_state)) { |
ret = PTR_ERR(connector_state); |
goto fail; |
} |
|
ret = drm_atomic_connector_set_property(connector, connector_state, |
property, val); |
if (ret) |
goto fail; |
|
ret = drm_atomic_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); |
|
/** |
* drm_atomic_helper_page_flip - execute a legacy page flip |
* @crtc: DRM crtc |
* @fb: DRM framebuffer |
* @event: optional DRM event to signal upon completion |
* @flags: flip flags for non-vblank sync'ed updates |
* |
* Provides a default page flip implementation using the atomic driver interface. |
* |
* Note that for now so called async page flips (i.e. updates which are not |
* synchronized to vblank) are not supported, since the atomic interfaces have |
* no provisions for this yet. |
* |
* Returns: |
* Returns 0 on success, negative errno numbers on failure. |
*/ |
int drm_atomic_helper_page_flip(struct drm_crtc *crtc, |
struct drm_framebuffer *fb, |
struct drm_pending_vblank_event *event, |
uint32_t flags) |
{ |
struct drm_plane *plane = crtc->primary; |
struct drm_atomic_state *state; |
struct drm_plane_state *plane_state; |
struct drm_crtc_state *crtc_state; |
int ret = 0; |
|
if (flags & DRM_MODE_PAGE_FLIP_ASYNC) |
return -EINVAL; |
|
state = drm_atomic_state_alloc(plane->dev); |
if (!state) |
return -ENOMEM; |
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
retry: |
crtc_state = drm_atomic_get_crtc_state(state, crtc); |
if (IS_ERR(crtc_state)) { |
ret = PTR_ERR(crtc_state); |
goto fail; |
} |
crtc_state->event = event; |
|
plane_state = drm_atomic_get_plane_state(state, plane); |
if (IS_ERR(plane_state)) { |
ret = PTR_ERR(plane_state); |
goto fail; |
} |
|
ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
if (ret != 0) |
goto fail; |
drm_atomic_set_fb_for_plane(plane_state, fb); |
|
ret = drm_atomic_async_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful async commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
/* |
* Someone might have exchanged the framebuffer while we dropped locks |
* in the backoff code. We need to fix up the fb refcount tracking the |
* core does for us. |
*/ |
plane->old_fb = plane->fb; |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_page_flip); |
|
/** |
* drm_atomic_helper_connector_dpms() - connector dpms helper implementation |
* @connector: affected connector |
* @mode: DPMS mode |
* |
* This is the main helper function provided by the atomic helper framework for |
* implementing the legacy DPMS connector interface. It computes the new desired |
* ->active state for the corresponding CRTC (if the connector is enabled) and |
* updates it. |
* |
* Returns: |
* Returns 0 on success, negative errno numbers on failure. |
*/ |
int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
int mode) |
{ |
struct drm_mode_config *config = &connector->dev->mode_config; |
struct drm_atomic_state *state; |
struct drm_crtc_state *crtc_state; |
struct drm_crtc *crtc; |
struct drm_connector *tmp_connector; |
int ret; |
bool active = false; |
int old_mode = connector->dpms; |
|
if (mode != DRM_MODE_DPMS_ON) |
mode = DRM_MODE_DPMS_OFF; |
|
connector->dpms = mode; |
crtc = connector->state->crtc; |
|
if (!crtc) |
return 0; |
|
state = drm_atomic_state_alloc(connector->dev); |
if (!state) |
return -ENOMEM; |
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
retry: |
crtc_state = drm_atomic_get_crtc_state(state, crtc); |
if (IS_ERR(crtc_state)) { |
ret = PTR_ERR(crtc_state); |
goto fail; |
} |
|
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); |
|
drm_for_each_connector(tmp_connector, connector->dev) { |
if (tmp_connector->state->crtc != crtc) |
continue; |
|
if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
active = true; |
break; |
} |
} |
crtc_state->active = active; |
|
ret = drm_atomic_commit(state); |
if (ret != 0) |
goto fail; |
|
/* Driver takes ownership of state on successful commit. */ |
return 0; |
fail: |
if (ret == -EDEADLK) |
goto backoff; |
|
connector->dpms = old_mode; |
drm_atomic_state_free(state); |
|
return ret; |
backoff: |
drm_atomic_state_clear(state); |
drm_atomic_legacy_backoff(state); |
|
goto retry; |
} |
EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); |
|
/** |
* 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. |
*/ |
|
/** |
* drm_atomic_helper_crtc_reset - default ->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 && crtc->state->mode_blob) |
drm_property_unreference_blob(crtc->state->mode_blob); |
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_reference_blob(state->mode_blob); |
state->mode_changed = false; |
state->active_changed = false; |
state->planes_changed = false; |
state->connectors_changed = false; |
state->event = NULL; |
} |
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 |
* @crtc: CRTC object |
* @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 *crtc, |
struct drm_crtc_state *state) |
{ |
if (state->mode_blob) |
drm_property_unreference_blob(state->mode_blob); |
} |
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(crtc, state); |
kfree(state); |
} |
EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); |
|
/** |
* drm_atomic_helper_plane_reset - default ->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 && plane->state->fb) |
drm_framebuffer_unreference(plane->state->fb); |
|
kfree(plane->state); |
plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); |
|
if (plane->state) |
plane->state->plane = plane; |
} |
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_reference(state->fb); |
} |
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 |
* @plane: plane object |
* @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 *plane, |
struct drm_plane_state *state) |
{ |
if (state->fb) |
drm_framebuffer_unreference(state->fb); |
} |
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(plane, state); |
kfree(state); |
} |
EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); |
|
/** |
* drm_atomic_helper_connector_reset - default ->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) |
{ |
kfree(connector->state); |
connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); |
|
if (connector->state) |
connector->state->connector = connector; |
} |
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)); |
} |
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. |
* |
* 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. |
*/ |
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_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_for_each_connector(conn, dev) { |
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); |
goto free; |
} |
} |
|
/* clear the acquire context so that it isn't accidentally reused */ |
state->acquire_ctx = NULL; |
|
free: |
if (err < 0) { |
drm_atomic_state_free(state); |
state = ERR_PTR(err); |
} |
|
return state; |
} |
EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); |
|
/** |
* __drm_atomic_helper_connector_destroy_state - release connector state |
* @connector: connector object |
* @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 *connector, |
struct drm_connector_state *state) |
{ |
/* |
* This is currently a placeholder so that drivers that subclass the |
* state will automatically do the right thing if code is ever added |
* to this function. |
*/ |
} |
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(connector, state); |
kfree(state); |
} |
EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |