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sys/dev/drm/core/drm_atomic.c
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/* | |||||
* 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 <linux/sync_file.h> | |||||
#include <drm/drm_atomic.h> | |||||
#include <drm/drm_atomic_uapi.h> | |||||
#include <drm/drm_debugfs.h> | |||||
#include <drm/drm_device.h> | |||||
#include <drm/drm_drv.h> | |||||
#include <drm/drm_file.h> | |||||
#include <drm/drm_fourcc.h> | |||||
#include <drm/drm_mode.h> | |||||
#include <drm/drm_print.h> | |||||
#include <drm/drm_writeback.h> | |||||
#include "drm_crtc_internal.h" | |||||
#include "drm_internal.h" | |||||
void __drm_crtc_commit_free(struct kref *kref) | |||||
{ | |||||
struct drm_crtc_commit *commit = | |||||
container_of(kref, struct drm_crtc_commit, ref); | |||||
kfree(commit); | |||||
} | |||||
EXPORT_SYMBOL(__drm_crtc_commit_free); | |||||
/** | |||||
* drm_atomic_state_default_release - | |||||
* release memory initialized by drm_atomic_state_init | |||||
* @state: atomic state | |||||
* | |||||
* Free all the memory allocated by drm_atomic_state_init. | |||||
* This should only be used by drivers which are still subclassing | |||||
* &drm_atomic_state and haven't switched to &drm_private_state yet. | |||||
*/ | |||||
void drm_atomic_state_default_release(struct drm_atomic_state *state) | |||||
{ | |||||
kfree(state->connectors); | |||||
kfree(state->crtcs); | |||||
kfree(state->planes); | |||||
kfree(state->private_objs); | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_state_default_release); | |||||
/** | |||||
* drm_atomic_state_init - init new atomic state | |||||
* @dev: DRM device | |||||
* @state: atomic state | |||||
* | |||||
* Default implementation for filling in a new atomic state. | |||||
* This should only be used by drivers which are still subclassing | |||||
* &drm_atomic_state and haven't switched to &drm_private_state yet. | |||||
*/ | |||||
int | |||||
drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) | |||||
{ | |||||
kref_init(&state->ref); | |||||
/* TODO legacy paths should maybe do a better job about | |||||
* setting this appropriately? | |||||
*/ | |||||
state->allow_modeset = true; | |||||
state->crtcs = kcalloc(dev->mode_config.num_crtc, | |||||
sizeof(*state->crtcs), GFP_KERNEL); | |||||
if (!state->crtcs) | |||||
goto fail; | |||||
state->planes = kcalloc(dev->mode_config.num_total_plane, | |||||
sizeof(*state->planes), GFP_KERNEL); | |||||
if (!state->planes) | |||||
goto fail; | |||||
state->dev = dev; | |||||
DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state); | |||||
return 0; | |||||
fail: | |||||
drm_atomic_state_default_release(state); | |||||
return -ENOMEM; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_state_init); | |||||
/** | |||||
* drm_atomic_state_alloc - allocate atomic state | |||||
* @dev: DRM device | |||||
* | |||||
* This allocates an empty atomic state to track updates. | |||||
*/ | |||||
struct drm_atomic_state * | |||||
drm_atomic_state_alloc(struct drm_device *dev) | |||||
{ | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
if (!config->funcs->atomic_state_alloc) { | |||||
struct drm_atomic_state *state; | |||||
state = kzalloc(sizeof(*state), GFP_KERNEL); | |||||
if (!state) | |||||
return NULL; | |||||
if (drm_atomic_state_init(dev, state) < 0) { | |||||
kfree(state); | |||||
return NULL; | |||||
} | |||||
return state; | |||||
} | |||||
return config->funcs->atomic_state_alloc(dev); | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_state_alloc); | |||||
/** | |||||
* drm_atomic_state_default_clear - clear base atomic state | |||||
* @state: atomic state | |||||
* | |||||
* Default implementation for clearing atomic state. | |||||
* This should only be used by drivers which are still subclassing | |||||
* &drm_atomic_state and haven't switched to &drm_private_state yet. | |||||
*/ | |||||
void drm_atomic_state_default_clear(struct drm_atomic_state *state) | |||||
{ | |||||
struct drm_device *dev = state->dev; | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
int i; | |||||
DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state); | |||||
for (i = 0; i < state->num_connector; i++) { | |||||
struct drm_connector *connector = state->connectors[i].ptr; | |||||
if (!connector) | |||||
continue; | |||||
connector->funcs->atomic_destroy_state(connector, | |||||
state->connectors[i].state); | |||||
state->connectors[i].ptr = NULL; | |||||
state->connectors[i].state = NULL; | |||||
state->connectors[i].old_state = NULL; | |||||
state->connectors[i].new_state = NULL; | |||||
drm_connector_put(connector); | |||||
} | |||||
for (i = 0; i < config->num_crtc; i++) { | |||||
struct drm_crtc *crtc = state->crtcs[i].ptr; | |||||
if (!crtc) | |||||
continue; | |||||
crtc->funcs->atomic_destroy_state(crtc, | |||||
state->crtcs[i].state); | |||||
state->crtcs[i].ptr = NULL; | |||||
state->crtcs[i].state = NULL; | |||||
state->crtcs[i].old_state = NULL; | |||||
state->crtcs[i].new_state = NULL; | |||||
if (state->crtcs[i].commit) { | |||||
drm_crtc_commit_put(state->crtcs[i].commit); | |||||
state->crtcs[i].commit = NULL; | |||||
} | |||||
} | |||||
for (i = 0; i < config->num_total_plane; i++) { | |||||
struct drm_plane *plane = state->planes[i].ptr; | |||||
if (!plane) | |||||
continue; | |||||
plane->funcs->atomic_destroy_state(plane, | |||||
state->planes[i].state); | |||||
state->planes[i].ptr = NULL; | |||||
state->planes[i].state = NULL; | |||||
state->planes[i].old_state = NULL; | |||||
state->planes[i].new_state = NULL; | |||||
} | |||||
for (i = 0; i < state->num_private_objs; i++) { | |||||
struct drm_private_obj *obj = state->private_objs[i].ptr; | |||||
obj->funcs->atomic_destroy_state(obj, | |||||
state->private_objs[i].state); | |||||
state->private_objs[i].ptr = NULL; | |||||
state->private_objs[i].state = NULL; | |||||
state->private_objs[i].old_state = NULL; | |||||
state->private_objs[i].new_state = NULL; | |||||
} | |||||
state->num_private_objs = 0; | |||||
if (state->fake_commit) { | |||||
drm_crtc_commit_put(state->fake_commit); | |||||
state->fake_commit = NULL; | |||||
} | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_state_default_clear); | |||||
/** | |||||
* drm_atomic_state_clear - clear state object | |||||
* @state: atomic state | |||||
* | |||||
* When the w/w mutex algorithm detects a deadlock we need to back off and drop | |||||
* all locks. So someone else could sneak in and change the current modeset | |||||
* configuration. Which means that all the state assembled in @state is no | |||||
* longer an atomic update to the current state, but to some arbitrary earlier | |||||
* state. Which could break assumptions the driver's | |||||
* &drm_mode_config_funcs.atomic_check likely relies on. | |||||
* | |||||
* Hence we must clear all cached state and completely start over, using this | |||||
* function. | |||||
*/ | |||||
void drm_atomic_state_clear(struct drm_atomic_state *state) | |||||
{ | |||||
struct drm_device *dev = state->dev; | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
if (config->funcs->atomic_state_clear) | |||||
config->funcs->atomic_state_clear(state); | |||||
else | |||||
drm_atomic_state_default_clear(state); | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_state_clear); | |||||
/** | |||||
* __drm_atomic_state_free - free all memory for an atomic state | |||||
* @ref: This atomic state to deallocate | |||||
* | |||||
* This frees all memory associated with an atomic state, including all the | |||||
* per-object state for planes, crtcs and connectors. | |||||
*/ | |||||
void __drm_atomic_state_free(struct kref *ref) | |||||
{ | |||||
struct drm_atomic_state *state = container_of(ref, typeof(*state), ref); | |||||
struct drm_mode_config *config = &state->dev->mode_config; | |||||
drm_atomic_state_clear(state); | |||||
DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state); | |||||
if (config->funcs->atomic_state_free) { | |||||
config->funcs->atomic_state_free(state); | |||||
} else { | |||||
drm_atomic_state_default_release(state); | |||||
kfree(state); | |||||
} | |||||
} | |||||
EXPORT_SYMBOL(__drm_atomic_state_free); | |||||
/** | |||||
* drm_atomic_get_crtc_state - get crtc state | |||||
* @state: global atomic state object | |||||
* @crtc: crtc to get state object for | |||||
* | |||||
* This function returns the crtc state for the given crtc, allocating it if | |||||
* needed. It will also grab the relevant crtc lock to make sure that the state | |||||
* is consistent. | |||||
* | |||||
* Returns: | |||||
* | |||||
* Either the allocated state or the error code encoded into the pointer. When | |||||
* the error is EDEADLK then the w/w mutex code has detected a deadlock and the | |||||
* entire atomic sequence must be restarted. All other errors are fatal. | |||||
*/ | |||||
struct drm_crtc_state * | |||||
drm_atomic_get_crtc_state(struct drm_atomic_state *state, | |||||
struct drm_crtc *crtc) | |||||
{ | |||||
int ret, index = drm_crtc_index(crtc); | |||||
struct drm_crtc_state *crtc_state; | |||||
WARN_ON(!state->acquire_ctx); | |||||
crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |||||
if (crtc_state) | |||||
return crtc_state; | |||||
ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); | |||||
if (ret) | |||||
return ERR_PTR(ret); | |||||
crtc_state = crtc->funcs->atomic_duplicate_state(crtc); | |||||
if (!crtc_state) | |||||
return ERR_PTR(-ENOMEM); | |||||
state->crtcs[index].state = crtc_state; | |||||
state->crtcs[index].old_state = crtc->state; | |||||
state->crtcs[index].new_state = crtc_state; | |||||
state->crtcs[index].ptr = crtc; | |||||
crtc_state->state = state; | |||||
DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n", | |||||
crtc->base.id, crtc->name, crtc_state, state); | |||||
return crtc_state; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_crtc_state); | |||||
static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state, | |||||
const struct drm_crtc_state *new_crtc_state) | |||||
{ | |||||
struct drm_crtc *crtc = new_crtc_state->crtc; | |||||
/* NOTE: we explicitly don't enforce constraints such as primary | |||||
* layer covering entire screen, since that is something we want | |||||
* to allow (on hw that supports it). For hw that does not, it | |||||
* should be checked in driver's crtc->atomic_check() vfunc. | |||||
* | |||||
* TODO: Add generic modeset state checks once we support those. | |||||
*/ | |||||
if (new_crtc_state->active && !new_crtc_state->enable) { | |||||
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n", | |||||
crtc->base.id, crtc->name); | |||||
return -EINVAL; | |||||
} | |||||
/* The state->enable vs. state->mode_blob checks can be WARN_ON, | |||||
* as this is a kernel-internal detail that userspace should never | |||||
* be able to trigger. */ | |||||
if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && | |||||
WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) { | |||||
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n", | |||||
crtc->base.id, crtc->name); | |||||
return -EINVAL; | |||||
} | |||||
if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && | |||||
WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) { | |||||
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n", | |||||
crtc->base.id, crtc->name); | |||||
return -EINVAL; | |||||
} | |||||
/* | |||||
* Reject event generation for when a CRTC is off and stays off. | |||||
* It wouldn't be hard to implement this, but userspace has a track | |||||
* record of happily burning through 100% cpu (or worse, crash) when the | |||||
* display pipe is suspended. To avoid all that fun just reject updates | |||||
* that ask for events since likely that indicates a bug in the | |||||
* compositor's drawing loop. This is consistent with the vblank IOCTL | |||||
* and legacy page_flip IOCTL which also reject service on a disabled | |||||
* pipe. | |||||
*/ | |||||
if (new_crtc_state->event && | |||||
!new_crtc_state->active && !old_crtc_state->active) { | |||||
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n", | |||||
crtc->base.id, crtc->name); | |||||
return -EINVAL; | |||||
} | |||||
return 0; | |||||
} | |||||
static void drm_atomic_crtc_print_state(struct drm_printer *p, | |||||
const struct drm_crtc_state *state) | |||||
{ | |||||
struct drm_crtc *crtc = state->crtc; | |||||
drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name); | |||||
drm_printf(p, "\tenable=%d\n", state->enable); | |||||
drm_printf(p, "\tactive=%d\n", state->active); | |||||
drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active); | |||||
drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed); | |||||
drm_printf(p, "\tmode_changed=%d\n", state->mode_changed); | |||||
drm_printf(p, "\tactive_changed=%d\n", state->active_changed); | |||||
drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed); | |||||
drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed); | |||||
drm_printf(p, "\tplane_mask=%x\n", state->plane_mask); | |||||
drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask); | |||||
drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask); | |||||
drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode)); | |||||
if (crtc->funcs->atomic_print_state) | |||||
crtc->funcs->atomic_print_state(p, state); | |||||
} | |||||
static int drm_atomic_connector_check(struct drm_connector *connector, | |||||
struct drm_connector_state *state) | |||||
{ | |||||
struct drm_crtc_state *crtc_state; | |||||
struct drm_writeback_job *writeback_job = state->writeback_job; | |||||
const struct drm_display_info *info = &connector->display_info; | |||||
state->max_bpc = info->bpc ? info->bpc : 8; | |||||
if (connector->max_bpc_property) | |||||
state->max_bpc = min(state->max_bpc, state->max_requested_bpc); | |||||
if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job) | |||||
return 0; | |||||
if (writeback_job->fb && !state->crtc) { | |||||
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n", | |||||
connector->base.id, connector->name); | |||||
return -EINVAL; | |||||
} | |||||
if (state->crtc) | |||||
crtc_state = drm_atomic_get_existing_crtc_state(state->state, | |||||
state->crtc); | |||||
if (writeback_job->fb && !crtc_state->active) { | |||||
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n", | |||||
connector->base.id, connector->name, | |||||
state->crtc->base.id); | |||||
return -EINVAL; | |||||
} | |||||
if (!writeback_job->fb) { | |||||
if (writeback_job->out_fence) { | |||||
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n", | |||||
connector->base.id, connector->name); | |||||
return -EINVAL; | |||||
} | |||||
drm_writeback_cleanup_job(writeback_job); | |||||
state->writeback_job = NULL; | |||||
} | |||||
return 0; | |||||
} | |||||
/** | |||||
* drm_atomic_get_plane_state - get plane state | |||||
* @state: global atomic state object | |||||
* @plane: plane to get state object for | |||||
* | |||||
* This function returns the plane state for the given plane, allocating it if | |||||
* needed. It will also grab the relevant plane lock to make sure that the state | |||||
* is consistent. | |||||
* | |||||
* Returns: | |||||
* | |||||
* Either the allocated state or the error code encoded into the pointer. When | |||||
* the error is EDEADLK then the w/w mutex code has detected a deadlock and the | |||||
* entire atomic sequence must be restarted. All other errors are fatal. | |||||
*/ | |||||
struct drm_plane_state * | |||||
drm_atomic_get_plane_state(struct drm_atomic_state *state, | |||||
struct drm_plane *plane) | |||||
{ | |||||
int ret, index = drm_plane_index(plane); | |||||
struct drm_plane_state *plane_state; | |||||
WARN_ON(!state->acquire_ctx); | |||||
/* the legacy pointers should never be set */ | |||||
WARN_ON(plane->fb); | |||||
WARN_ON(plane->old_fb); | |||||
WARN_ON(plane->crtc); | |||||
plane_state = drm_atomic_get_existing_plane_state(state, plane); | |||||
if (plane_state) | |||||
return plane_state; | |||||
ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); | |||||
if (ret) | |||||
return ERR_PTR(ret); | |||||
plane_state = plane->funcs->atomic_duplicate_state(plane); | |||||
if (!plane_state) | |||||
return ERR_PTR(-ENOMEM); | |||||
state->planes[index].state = plane_state; | |||||
state->planes[index].ptr = plane; | |||||
state->planes[index].old_state = plane->state; | |||||
state->planes[index].new_state = plane_state; | |||||
plane_state->state = state; | |||||
DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n", | |||||
plane->base.id, plane->name, plane_state, state); | |||||
if (plane_state->crtc) { | |||||
struct drm_crtc_state *crtc_state; | |||||
crtc_state = drm_atomic_get_crtc_state(state, | |||||
plane_state->crtc); | |||||
if (IS_ERR(crtc_state)) | |||||
return ERR_CAST(crtc_state); | |||||
} | |||||
return plane_state; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_plane_state); | |||||
static bool | |||||
plane_switching_crtc(const struct drm_plane_state *old_plane_state, | |||||
const struct drm_plane_state *new_plane_state) | |||||
{ | |||||
if (!old_plane_state->crtc || !new_plane_state->crtc) | |||||
return false; | |||||
if (old_plane_state->crtc == new_plane_state->crtc) | |||||
return false; | |||||
/* This could be refined, but currently there's no helper or driver code | |||||
* to implement direct switching of active planes nor userspace to take | |||||
* advantage of more direct plane switching without the intermediate | |||||
* full OFF state. | |||||
*/ | |||||
return true; | |||||
} | |||||
/** | |||||
* drm_atomic_plane_check - check plane state | |||||
* @old_plane_state: old plane state to check | |||||
* @new_plane_state: new plane state to check | |||||
* | |||||
* Provides core sanity checks for plane state. | |||||
* | |||||
* RETURNS: | |||||
* Zero on success, error code on failure | |||||
*/ | |||||
static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state, | |||||
const struct drm_plane_state *new_plane_state) | |||||
{ | |||||
struct drm_plane *plane = new_plane_state->plane; | |||||
struct drm_crtc *crtc = new_plane_state->crtc; | |||||
const struct drm_framebuffer *fb = new_plane_state->fb; | |||||
unsigned int fb_width, fb_height; | |||||
struct drm_mode_rect *clips; | |||||
uint32_t num_clips; | |||||
int ret; | |||||
/* either *both* CRTC and FB must be set, or neither */ | |||||
if (crtc && !fb) { | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n", | |||||
plane->base.id, plane->name); | |||||
return -EINVAL; | |||||
} else if (fb && !crtc) { | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n", | |||||
plane->base.id, plane->name); | |||||
return -EINVAL; | |||||
} | |||||
/* if disabled, we don't care about the rest of the state: */ | |||||
if (!crtc) | |||||
return 0; | |||||
/* Check whether this plane is usable on this CRTC */ | |||||
if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { | |||||
DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n", | |||||
crtc->base.id, crtc->name, | |||||
plane->base.id, plane->name); | |||||
return -EINVAL; | |||||
} | |||||
/* Check whether this plane supports the fb pixel format. */ | |||||
ret = drm_plane_check_pixel_format(plane, fb->format->format, | |||||
fb->modifier); | |||||
if (ret) { | |||||
struct drm_format_name_buf format_name; | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n", | |||||
plane->base.id, plane->name, | |||||
drm_get_format_name(fb->format->format, | |||||
&format_name), | |||||
fb->modifier); | |||||
return ret; | |||||
} | |||||
/* Give drivers some help against integer overflows */ | |||||
if (new_plane_state->crtc_w > INT_MAX || | |||||
new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w || | |||||
new_plane_state->crtc_h > INT_MAX || | |||||
new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) { | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n", | |||||
plane->base.id, plane->name, | |||||
new_plane_state->crtc_w, new_plane_state->crtc_h, | |||||
new_plane_state->crtc_x, new_plane_state->crtc_y); | |||||
return -ERANGE; | |||||
} | |||||
fb_width = fb->width << 16; | |||||
fb_height = fb->height << 16; | |||||
/* Make sure source coordinates are inside the fb. */ | |||||
if (new_plane_state->src_w > fb_width || | |||||
new_plane_state->src_x > fb_width - new_plane_state->src_w || | |||||
new_plane_state->src_h > fb_height || | |||||
new_plane_state->src_y > fb_height - new_plane_state->src_h) { | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates " | |||||
"%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n", | |||||
plane->base.id, plane->name, | |||||
new_plane_state->src_w >> 16, | |||||
((new_plane_state->src_w & 0xffff) * 15625) >> 10, | |||||
new_plane_state->src_h >> 16, | |||||
((new_plane_state->src_h & 0xffff) * 15625) >> 10, | |||||
new_plane_state->src_x >> 16, | |||||
((new_plane_state->src_x & 0xffff) * 15625) >> 10, | |||||
new_plane_state->src_y >> 16, | |||||
((new_plane_state->src_y & 0xffff) * 15625) >> 10, | |||||
fb->width, fb->height); | |||||
return -ENOSPC; | |||||
} | |||||
clips = drm_plane_get_damage_clips(new_plane_state); | |||||
num_clips = drm_plane_get_damage_clips_count(new_plane_state); | |||||
/* Make sure damage clips are valid and inside the fb. */ | |||||
while (num_clips > 0) { | |||||
if (clips->x1 >= clips->x2 || | |||||
clips->y1 >= clips->y2 || | |||||
clips->x1 < 0 || | |||||
clips->y1 < 0 || | |||||
clips->x2 > fb_width || | |||||
clips->y2 > fb_height) { | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n", | |||||
plane->base.id, plane->name, clips->x1, | |||||
clips->y1, clips->x2, clips->y2); | |||||
return -EINVAL; | |||||
} | |||||
clips++; | |||||
num_clips--; | |||||
} | |||||
if (plane_switching_crtc(old_plane_state, new_plane_state)) { | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n", | |||||
plane->base.id, plane->name); | |||||
return -EINVAL; | |||||
} | |||||
return 0; | |||||
} | |||||
static void drm_atomic_plane_print_state(struct drm_printer *p, | |||||
const struct drm_plane_state *state) | |||||
{ | |||||
struct drm_plane *plane = state->plane; | |||||
struct drm_rect src = drm_plane_state_src(state); | |||||
struct drm_rect dest = drm_plane_state_dest(state); | |||||
drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name); | |||||
drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); | |||||
drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0); | |||||
if (state->fb) | |||||
drm_framebuffer_print_info(p, 2, state->fb); | |||||
drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest)); | |||||
drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src)); | |||||
drm_printf(p, "\trotation=%x\n", state->rotation); | |||||
drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos); | |||||
drm_printf(p, "\tcolor-encoding=%s\n", | |||||
drm_get_color_encoding_name(state->color_encoding)); | |||||
drm_printf(p, "\tcolor-range=%s\n", | |||||
drm_get_color_range_name(state->color_range)); | |||||
if (plane->funcs->atomic_print_state) | |||||
plane->funcs->atomic_print_state(p, state); | |||||
} | |||||
/** | |||||
* DOC: handling driver private state | |||||
* | |||||
* Very often the DRM objects exposed to userspace in the atomic modeset api | |||||
* (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the | |||||
* underlying hardware. Especially for any kind of shared resources (e.g. shared | |||||
* clocks, scaler units, bandwidth and fifo limits shared among a group of | |||||
* planes or CRTCs, and so on) it makes sense to model these as independent | |||||
* objects. Drivers then need to do similar state tracking and commit ordering for | |||||
* such private (since not exposed to userpace) objects as the atomic core and | |||||
* helpers already provide for connectors, planes and CRTCs. | |||||
* | |||||
* To make this easier on drivers the atomic core provides some support to track | |||||
* driver private state objects using struct &drm_private_obj, with the | |||||
* associated state struct &drm_private_state. | |||||
* | |||||
* Similar to userspace-exposed objects, private state structures can be | |||||
* acquired by calling drm_atomic_get_private_obj_state(). Since this function | |||||
* does not take care of locking, drivers should wrap it for each type of | |||||
* private state object they have with the required call to drm_modeset_lock() | |||||
* for the corresponding &drm_modeset_lock. | |||||
* | |||||
* All private state structures contained in a &drm_atomic_state update can be | |||||
* iterated using for_each_oldnew_private_obj_in_state(), | |||||
* for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state(). | |||||
* Drivers are recommended to wrap these for each type of driver private state | |||||
* object they have, filtering on &drm_private_obj.funcs using for_each_if(), at | |||||
* least if they want to iterate over all objects of a given type. | |||||
* | |||||
* An earlier way to handle driver private state was by subclassing struct | |||||
* &drm_atomic_state. But since that encourages non-standard ways to implement | |||||
* the check/commit split atomic requires (by using e.g. "check and rollback or | |||||
* commit instead" of "duplicate state, check, then either commit or release | |||||
* duplicated state) it is deprecated in favour of using &drm_private_state. | |||||
*/ | |||||
/** | |||||
* drm_atomic_private_obj_init - initialize private object | |||||
* @dev: DRM device this object will be attached to | |||||
* @obj: private object | |||||
* @state: initial private object state | |||||
* @funcs: pointer to the struct of function pointers that identify the object | |||||
* type | |||||
* | |||||
* Initialize the private object, which can be embedded into any | |||||
* driver private object that needs its own atomic state. | |||||
*/ | |||||
void | |||||
drm_atomic_private_obj_init(struct drm_device *dev, | |||||
struct drm_private_obj *obj, | |||||
struct drm_private_state *state, | |||||
const struct drm_private_state_funcs *funcs) | |||||
{ | |||||
memset(obj, 0, sizeof(*obj)); | |||||
drm_modeset_lock_init(&obj->lock); | |||||
obj->state = state; | |||||
obj->funcs = funcs; | |||||
list_add_tail(&obj->head, &dev->mode_config.privobj_list); | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_private_obj_init); | |||||
/** | |||||
* drm_atomic_private_obj_fini - finalize private object | |||||
* @obj: private object | |||||
* | |||||
* Finalize the private object. | |||||
*/ | |||||
void | |||||
drm_atomic_private_obj_fini(struct drm_private_obj *obj) | |||||
{ | |||||
list_del(&obj->head); | |||||
obj->funcs->atomic_destroy_state(obj, obj->state); | |||||
drm_modeset_lock_fini(&obj->lock); | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_private_obj_fini); | |||||
/** | |||||
* drm_atomic_get_private_obj_state - get private object state | |||||
* @state: global atomic state | |||||
* @obj: private object to get the state for | |||||
* | |||||
* This function returns the private object state for the given private object, | |||||
* allocating the state if needed. It will also grab the relevant private | |||||
* object lock to make sure that the state is consistent. | |||||
* | |||||
* RETURNS: | |||||
* | |||||
* Either the allocated state or the error code encoded into a pointer. | |||||
*/ | |||||
struct drm_private_state * | |||||
drm_atomic_get_private_obj_state(struct drm_atomic_state *state, | |||||
struct drm_private_obj *obj) | |||||
{ | |||||
int index, num_objs, i, ret; | |||||
size_t size; | |||||
struct __drm_private_objs_state *arr; | |||||
struct drm_private_state *obj_state; | |||||
for (i = 0; i < state->num_private_objs; i++) | |||||
if (obj == state->private_objs[i].ptr) | |||||
return state->private_objs[i].state; | |||||
ret = drm_modeset_lock(&obj->lock, state->acquire_ctx); | |||||
if (ret) | |||||
return ERR_PTR(ret); | |||||
num_objs = state->num_private_objs + 1; | |||||
size = sizeof(*state->private_objs) * num_objs; | |||||
arr = krealloc(state->private_objs, size, GFP_KERNEL); | |||||
if (!arr) | |||||
return ERR_PTR(-ENOMEM); | |||||
state->private_objs = arr; | |||||
index = state->num_private_objs; | |||||
memset(&state->private_objs[index], 0, sizeof(*state->private_objs)); | |||||
obj_state = obj->funcs->atomic_duplicate_state(obj); | |||||
if (!obj_state) | |||||
return ERR_PTR(-ENOMEM); | |||||
state->private_objs[index].state = obj_state; | |||||
state->private_objs[index].old_state = obj->state; | |||||
state->private_objs[index].new_state = obj_state; | |||||
state->private_objs[index].ptr = obj; | |||||
obj_state->state = state; | |||||
state->num_private_objs = num_objs; | |||||
DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n", | |||||
obj, obj_state, state); | |||||
return obj_state; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_private_obj_state); | |||||
/** | |||||
* drm_atomic_get_old_private_obj_state | |||||
* @state: global atomic state object | |||||
* @obj: private_obj to grab | |||||
* | |||||
* This function returns the old private object state for the given private_obj, | |||||
* or NULL if the private_obj is not part of the global atomic state. | |||||
*/ | |||||
struct drm_private_state * | |||||
drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state, | |||||
struct drm_private_obj *obj) | |||||
{ | |||||
int i; | |||||
for (i = 0; i < state->num_private_objs; i++) | |||||
if (obj == state->private_objs[i].ptr) | |||||
return state->private_objs[i].old_state; | |||||
return NULL; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state); | |||||
/** | |||||
* drm_atomic_get_new_private_obj_state | |||||
* @state: global atomic state object | |||||
* @obj: private_obj to grab | |||||
* | |||||
* This function returns the new private object state for the given private_obj, | |||||
* or NULL if the private_obj is not part of the global atomic state. | |||||
*/ | |||||
struct drm_private_state * | |||||
drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state, | |||||
struct drm_private_obj *obj) | |||||
{ | |||||
int i; | |||||
for (i = 0; i < state->num_private_objs; i++) | |||||
if (obj == state->private_objs[i].ptr) | |||||
return state->private_objs[i].new_state; | |||||
return NULL; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state); | |||||
/** | |||||
* drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder | |||||
* @state: Atomic state | |||||
* @encoder: The encoder to fetch the connector state for | |||||
* | |||||
* This function finds and returns the connector that was connected to @encoder | |||||
* as specified by the @state. | |||||
* | |||||
* If there is no connector in @state which previously had @encoder connected to | |||||
* it, this function will return NULL. While this may seem like an invalid use | |||||
* case, it is sometimes useful to differentiate commits which had no prior | |||||
* connectors attached to @encoder vs ones that did (and to inspect their | |||||
* state). This is especially true in enable hooks because the pipeline has | |||||
* changed. | |||||
* | |||||
* Returns: The old connector connected to @encoder, or NULL if the encoder is | |||||
* not connected. | |||||
*/ | |||||
struct drm_connector * | |||||
drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state, | |||||
struct drm_encoder *encoder) | |||||
{ | |||||
struct drm_connector_state *conn_state; | |||||
struct drm_connector *connector; | |||||
unsigned int i; | |||||
for_each_old_connector_in_state(state, connector, conn_state, i) { | |||||
if (conn_state->best_encoder == encoder) | |||||
return connector; | |||||
} | |||||
return NULL; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder); | |||||
/** | |||||
* drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder | |||||
* @state: Atomic state | |||||
* @encoder: The encoder to fetch the connector state for | |||||
* | |||||
* This function finds and returns the connector that will be connected to | |||||
* @encoder as specified by the @state. | |||||
* | |||||
* If there is no connector in @state which will have @encoder connected to it, | |||||
* this function will return NULL. While this may seem like an invalid use case, | |||||
* it is sometimes useful to differentiate commits which have no connectors | |||||
* attached to @encoder vs ones that do (and to inspect their state). This is | |||||
* especially true in disable hooks because the pipeline will change. | |||||
* | |||||
* Returns: The new connector connected to @encoder, or NULL if the encoder is | |||||
* not connected. | |||||
*/ | |||||
struct drm_connector * | |||||
drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state, | |||||
struct drm_encoder *encoder) | |||||
{ | |||||
struct drm_connector_state *conn_state; | |||||
struct drm_connector *connector; | |||||
unsigned int i; | |||||
for_each_new_connector_in_state(state, connector, conn_state, i) { | |||||
if (conn_state->best_encoder == encoder) | |||||
return connector; | |||||
} | |||||
return NULL; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder); | |||||
/** | |||||
* drm_atomic_get_connector_state - get connector state | |||||
* @state: global atomic state object | |||||
* @connector: connector to get state object for | |||||
* | |||||
* This function returns the connector state for the given connector, | |||||
* allocating it if needed. It will also grab the relevant connector lock to | |||||
* make sure that the state is consistent. | |||||
* | |||||
* Returns: | |||||
* | |||||
* Either the allocated state or the error code encoded into the pointer. When | |||||
* the error is EDEADLK then the w/w mutex code has detected a deadlock and the | |||||
* entire atomic sequence must be restarted. All other errors are fatal. | |||||
*/ | |||||
struct drm_connector_state * | |||||
drm_atomic_get_connector_state(struct drm_atomic_state *state, | |||||
struct drm_connector *connector) | |||||
{ | |||||
int ret, index; | |||||
struct drm_mode_config *config = &connector->dev->mode_config; | |||||
struct drm_connector_state *connector_state; | |||||
WARN_ON(!state->acquire_ctx); | |||||
ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); | |||||
if (ret) | |||||
return ERR_PTR(ret); | |||||
index = drm_connector_index(connector); | |||||
if (index >= state->num_connector) { | |||||
struct __drm_connnectors_state *c; | |||||
int alloc = max(index + 1, config->num_connector); | |||||
c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL); | |||||
if (!c) | |||||
return ERR_PTR(-ENOMEM); | |||||
state->connectors = c; | |||||
memset(&state->connectors[state->num_connector], 0, | |||||
sizeof(*state->connectors) * (alloc - state->num_connector)); | |||||
state->num_connector = alloc; | |||||
} | |||||
if (state->connectors[index].state) | |||||
return state->connectors[index].state; | |||||
connector_state = connector->funcs->atomic_duplicate_state(connector); | |||||
if (!connector_state) | |||||
return ERR_PTR(-ENOMEM); | |||||
drm_connector_get(connector); | |||||
state->connectors[index].state = connector_state; | |||||
state->connectors[index].old_state = connector->state; | |||||
state->connectors[index].new_state = connector_state; | |||||
state->connectors[index].ptr = connector; | |||||
connector_state->state = state; | |||||
DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n", | |||||
connector->base.id, connector->name, | |||||
connector_state, state); | |||||
if (connector_state->crtc) { | |||||
struct drm_crtc_state *crtc_state; | |||||
crtc_state = drm_atomic_get_crtc_state(state, | |||||
connector_state->crtc); | |||||
if (IS_ERR(crtc_state)) | |||||
return ERR_CAST(crtc_state); | |||||
} | |||||
return connector_state; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_get_connector_state); | |||||
static void drm_atomic_connector_print_state(struct drm_printer *p, | |||||
const struct drm_connector_state *state) | |||||
{ | |||||
struct drm_connector *connector = state->connector; | |||||
drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name); | |||||
drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); | |||||
drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware); | |||||
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) | |||||
if (state->writeback_job && state->writeback_job->fb) | |||||
drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id); | |||||
if (connector->funcs->atomic_print_state) | |||||
connector->funcs->atomic_print_state(p, state); | |||||
} | |||||
/** | |||||
* drm_atomic_add_affected_connectors - add connectors for crtc | |||||
* @state: atomic state | |||||
* @crtc: DRM crtc | |||||
* | |||||
* This function walks the current configuration and adds all connectors | |||||
* currently using @crtc to the atomic configuration @state. Note that this | |||||
* function must acquire the connection mutex. This can potentially cause | |||||
* unneeded seralization if the update is just for the planes on one crtc. Hence | |||||
* drivers and helpers should only call this when really needed (e.g. when a | |||||
* full modeset needs to happen due to some change). | |||||
* | |||||
* Returns: | |||||
* 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK | |||||
* then the w/w mutex code has detected a deadlock and the entire atomic | |||||
* sequence must be restarted. All other errors are fatal. | |||||
*/ | |||||
int | |||||
drm_atomic_add_affected_connectors(struct drm_atomic_state *state, | |||||
struct drm_crtc *crtc) | |||||
{ | |||||
struct drm_mode_config *config = &state->dev->mode_config; | |||||
struct drm_connector *connector; | |||||
struct drm_connector_state *conn_state; | |||||
struct drm_connector_list_iter conn_iter; | |||||
struct drm_crtc_state *crtc_state; | |||||
int ret; | |||||
crtc_state = drm_atomic_get_crtc_state(state, crtc); | |||||
if (IS_ERR(crtc_state)) | |||||
return PTR_ERR(crtc_state); | |||||
ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); | |||||
if (ret) | |||||
return ret; | |||||
DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n", | |||||
crtc->base.id, crtc->name, state); | |||||
/* | |||||
* Changed connectors are already in @state, so only need to look | |||||
* at the connector_mask in crtc_state. | |||||
*/ | |||||
drm_connector_list_iter_begin(state->dev, &conn_iter); | |||||
drm_for_each_connector_iter(connector, &conn_iter) { | |||||
if (!(crtc_state->connector_mask & drm_connector_mask(connector))) | |||||
continue; | |||||
conn_state = drm_atomic_get_connector_state(state, connector); | |||||
if (IS_ERR(conn_state)) { | |||||
drm_connector_list_iter_end(&conn_iter); | |||||
return PTR_ERR(conn_state); | |||||
} | |||||
} | |||||
drm_connector_list_iter_end(&conn_iter); | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_add_affected_connectors); | |||||
/** | |||||
* drm_atomic_add_affected_planes - add planes for crtc | |||||
* @state: atomic state | |||||
* @crtc: DRM crtc | |||||
* | |||||
* This function walks the current configuration and adds all planes | |||||
* currently used by @crtc to the atomic configuration @state. This is useful | |||||
* when an atomic commit also needs to check all currently enabled plane on | |||||
* @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC | |||||
* to avoid special code to force-enable all planes. | |||||
* | |||||
* Since acquiring a plane state will always also acquire the w/w mutex of the | |||||
* current CRTC for that plane (if there is any) adding all the plane states for | |||||
* a CRTC will not reduce parallism of atomic updates. | |||||
* | |||||
* Returns: | |||||
* 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK | |||||
* then the w/w mutex code has detected a deadlock and the entire atomic | |||||
* sequence must be restarted. All other errors are fatal. | |||||
*/ | |||||
int | |||||
drm_atomic_add_affected_planes(struct drm_atomic_state *state, | |||||
struct drm_crtc *crtc) | |||||
{ | |||||
const struct drm_crtc_state *old_crtc_state = | |||||
drm_atomic_get_old_crtc_state(state, crtc); | |||||
struct drm_plane *plane; | |||||
WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc)); | |||||
DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n", | |||||
crtc->base.id, crtc->name, state); | |||||
drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) { | |||||
struct drm_plane_state *plane_state = | |||||
drm_atomic_get_plane_state(state, plane); | |||||
if (IS_ERR(plane_state)) | |||||
return PTR_ERR(plane_state); | |||||
} | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_add_affected_planes); | |||||
/** | |||||
* drm_atomic_check_only - check whether a given config would work | |||||
* @state: atomic configuration to check | |||||
* | |||||
* Note that this function can return -EDEADLK if the driver needed to acquire | |||||
* more locks but encountered a deadlock. The caller must then do the usual w/w | |||||
* backoff dance and restart. All other errors are fatal. | |||||
* | |||||
* Returns: | |||||
* 0 on success, negative error code on failure. | |||||
*/ | |||||
int drm_atomic_check_only(struct drm_atomic_state *state) | |||||
{ | |||||
struct drm_device *dev = state->dev; | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
struct drm_plane *plane; | |||||
struct drm_plane_state *old_plane_state; | |||||
struct drm_plane_state *new_plane_state; | |||||
struct drm_crtc *crtc; | |||||
struct drm_crtc_state *old_crtc_state; | |||||
struct drm_crtc_state *new_crtc_state; | |||||
struct drm_connector *conn; | |||||
struct drm_connector_state *conn_state; | |||||
int i, ret = 0; | |||||
DRM_DEBUG_ATOMIC("checking %p\n", state); | |||||
for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { | |||||
ret = drm_atomic_plane_check(old_plane_state, new_plane_state); | |||||
if (ret) { | |||||
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n", | |||||
plane->base.id, plane->name); | |||||
return ret; | |||||
} | |||||
} | |||||
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { | |||||
ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state); | |||||
if (ret) { | |||||
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n", | |||||
crtc->base.id, crtc->name); | |||||
return ret; | |||||
} | |||||
} | |||||
for_each_new_connector_in_state(state, conn, conn_state, i) { | |||||
ret = drm_atomic_connector_check(conn, conn_state); | |||||
if (ret) { | |||||
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n", | |||||
conn->base.id, conn->name); | |||||
return ret; | |||||
} | |||||
} | |||||
if (config->funcs->atomic_check) { | |||||
ret = config->funcs->atomic_check(state->dev, state); | |||||
if (ret) { | |||||
DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n", | |||||
state, ret); | |||||
return ret; | |||||
} | |||||
} | |||||
if (!state->allow_modeset) { | |||||
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { | |||||
if (drm_atomic_crtc_needs_modeset(new_crtc_state)) { | |||||
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n", | |||||
crtc->base.id, crtc->name); | |||||
return -EINVAL; | |||||
} | |||||
} | |||||
} | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_check_only); | |||||
/** | |||||
* drm_atomic_commit - commit configuration atomically | |||||
* @state: atomic configuration to check | |||||
* | |||||
* Note that this function can return -EDEADLK if the driver needed to acquire | |||||
* more locks but encountered a deadlock. The caller must then do the usual w/w | |||||
* backoff dance and restart. All other errors are fatal. | |||||
* | |||||
* This function will take its own reference on @state. | |||||
* Callers should always release their reference with drm_atomic_state_put(). | |||||
* | |||||
* Returns: | |||||
* 0 on success, negative error code on failure. | |||||
*/ | |||||
int drm_atomic_commit(struct drm_atomic_state *state) | |||||
{ | |||||
struct drm_mode_config *config = &state->dev->mode_config; | |||||
int ret; | |||||
ret = drm_atomic_check_only(state); | |||||
if (ret) | |||||
return ret; | |||||
DRM_DEBUG_ATOMIC("committing %p\n", state); | |||||
return config->funcs->atomic_commit(state->dev, state, false); | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_commit); | |||||
/** | |||||
* drm_atomic_nonblocking_commit - atomic nonblocking commit | |||||
* @state: atomic configuration to check | |||||
* | |||||
* Note that this function can return -EDEADLK if the driver needed to acquire | |||||
* more locks but encountered a deadlock. The caller must then do the usual w/w | |||||
* backoff dance and restart. All other errors are fatal. | |||||
* | |||||
* This function will take its own reference on @state. | |||||
* Callers should always release their reference with drm_atomic_state_put(). | |||||
* | |||||
* Returns: | |||||
* 0 on success, negative error code on failure. | |||||
*/ | |||||
int drm_atomic_nonblocking_commit(struct drm_atomic_state *state) | |||||
{ | |||||
struct drm_mode_config *config = &state->dev->mode_config; | |||||
int ret; | |||||
ret = drm_atomic_check_only(state); | |||||
if (ret) | |||||
return ret; | |||||
DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state); | |||||
return config->funcs->atomic_commit(state->dev, state, true); | |||||
} | |||||
EXPORT_SYMBOL(drm_atomic_nonblocking_commit); | |||||
/* just used from drm-client 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_w = 0; | |||||
plane_state->crtc_h = 0; | |||||
plane_state->src_x = 0; | |||||
plane_state->src_y = 0; | |||||
plane_state->src_w = 0; | |||||
plane_state->src_h = 0; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(__drm_atomic_helper_disable_plane); | |||||
static int update_output_state(struct drm_atomic_state *state, | |||||
struct drm_mode_set *set) | |||||
{ | |||||
struct drm_device *dev = set->crtc->dev; | |||||
struct drm_crtc *crtc; | |||||
struct drm_crtc_state *new_crtc_state; | |||||
struct drm_connector *connector; | |||||
struct drm_connector_state *new_conn_state; | |||||
int ret, i; | |||||
ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |||||
state->acquire_ctx); | |||||
if (ret) | |||||
return ret; | |||||
/* First disable all connectors on the target crtc. */ | |||||
ret = drm_atomic_add_affected_connectors(state, set->crtc); | |||||
if (ret) | |||||
return ret; | |||||
for_each_new_connector_in_state(state, connector, new_conn_state, i) { | |||||
if (new_conn_state->crtc == set->crtc) { | |||||
ret = drm_atomic_set_crtc_for_connector(new_conn_state, | |||||
NULL); | |||||
if (ret) | |||||
return ret; | |||||
/* Make sure legacy setCrtc always re-trains */ | |||||
new_conn_state->link_status = DRM_LINK_STATUS_GOOD; | |||||
} | |||||
} | |||||
/* Then set all connectors from set->connectors on the target crtc */ | |||||
for (i = 0; i < set->num_connectors; i++) { | |||||
new_conn_state = drm_atomic_get_connector_state(state, | |||||
set->connectors[i]); | |||||
if (IS_ERR(new_conn_state)) | |||||
return PTR_ERR(new_conn_state); | |||||
ret = drm_atomic_set_crtc_for_connector(new_conn_state, | |||||
set->crtc); | |||||
if (ret) | |||||
return ret; | |||||
} | |||||
for_each_new_crtc_in_state(state, crtc, new_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 (!new_crtc_state->connector_mask) { | |||||
ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state, | |||||
NULL); | |||||
if (ret < 0) | |||||
return ret; | |||||
new_crtc_state->active = false; | |||||
} | |||||
} | |||||
return 0; | |||||
} | |||||
/* just used from drm-client 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_mode_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_w = hdisplay; | |||||
primary_state->crtc_h = vdisplay; | |||||
primary_state->src_x = set->x << 16; | |||||
primary_state->src_y = set->y << 16; | |||||
if (drm_rotation_90_or_270(primary_state->rotation)) { | |||||
primary_state->src_w = vdisplay << 16; | |||||
primary_state->src_h = hdisplay << 16; | |||||
} else { | |||||
primary_state->src_w = hdisplay << 16; | |||||
primary_state->src_h = vdisplay << 16; | |||||
} | |||||
commit: | |||||
ret = update_output_state(state, set); | |||||
if (ret) | |||||
return ret; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(__drm_atomic_helper_set_config); | |||||
void drm_atomic_print_state(const struct drm_atomic_state *state) | |||||
{ | |||||
struct drm_printer p = drm_info_printer(state->dev->dev); | |||||
struct drm_plane *plane; | |||||
struct drm_plane_state *plane_state; | |||||
struct drm_crtc *crtc; | |||||
struct drm_crtc_state *crtc_state; | |||||
struct drm_connector *connector; | |||||
struct drm_connector_state *connector_state; | |||||
int i; | |||||
DRM_DEBUG_ATOMIC("checking %p\n", state); | |||||
for_each_new_plane_in_state(state, plane, plane_state, i) | |||||
drm_atomic_plane_print_state(&p, plane_state); | |||||
for_each_new_crtc_in_state(state, crtc, crtc_state, i) | |||||
drm_atomic_crtc_print_state(&p, crtc_state); | |||||
for_each_new_connector_in_state(state, connector, connector_state, i) | |||||
drm_atomic_connector_print_state(&p, connector_state); | |||||
} | |||||
static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p, | |||||
bool take_locks) | |||||
{ | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
struct drm_plane *plane; | |||||
struct drm_crtc *crtc; | |||||
struct drm_connector *connector; | |||||
struct drm_connector_list_iter conn_iter; | |||||
if (!drm_drv_uses_atomic_modeset(dev)) | |||||
return; | |||||
list_for_each_entry(plane, &config->plane_list, head) { | |||||
if (take_locks) | |||||
drm_modeset_lock(&plane->mutex, NULL); | |||||
drm_atomic_plane_print_state(p, plane->state); | |||||
if (take_locks) | |||||
drm_modeset_unlock(&plane->mutex); | |||||
} | |||||
list_for_each_entry(crtc, &config->crtc_list, head) { | |||||
if (take_locks) | |||||
drm_modeset_lock(&crtc->mutex, NULL); | |||||
drm_atomic_crtc_print_state(p, crtc->state); | |||||
if (take_locks) | |||||
drm_modeset_unlock(&crtc->mutex); | |||||
} | |||||
drm_connector_list_iter_begin(dev, &conn_iter); | |||||
if (take_locks) | |||||
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |||||
drm_for_each_connector_iter(connector, &conn_iter) | |||||
drm_atomic_connector_print_state(p, connector->state); | |||||
if (take_locks) | |||||
drm_modeset_unlock(&dev->mode_config.connection_mutex); | |||||
drm_connector_list_iter_end(&conn_iter); | |||||
} | |||||
/** | |||||
* drm_state_dump - dump entire device atomic state | |||||
* @dev: the drm device | |||||
* @p: where to print the state to | |||||
* | |||||
* Just for debugging. Drivers might want an option to dump state | |||||
* to dmesg in case of error irq's. (Hint, you probably want to | |||||
* ratelimit this!) | |||||
* | |||||
* The caller must drm_modeset_lock_all(), or if this is called | |||||
* from error irq handler, it should not be enabled by default. | |||||
* (Ie. if you are debugging errors you might not care that this | |||||
* is racey. But calling this without all modeset locks held is | |||||
* not inherently safe.) | |||||
*/ | |||||
void drm_state_dump(struct drm_device *dev, struct drm_printer *p) | |||||
{ | |||||
__drm_state_dump(dev, p, false); | |||||
} | |||||
EXPORT_SYMBOL(drm_state_dump); | |||||
#ifdef CONFIG_DEBUG_FS | |||||
static int drm_state_info(struct seq_file *m, void *data) | |||||
{ | |||||
struct drm_info_node *node = (struct drm_info_node *) m->private; | |||||
struct drm_device *dev = node->minor->dev; | |||||
struct drm_printer p = drm_seq_file_printer(m); | |||||
__drm_state_dump(dev, &p, true); | |||||
return 0; | |||||
} | |||||
/* any use in debugfs files to dump individual planes/crtc/etc? */ | |||||
static const struct drm_info_list drm_atomic_debugfs_list[] = { | |||||
{"state", drm_state_info, 0}, | |||||
}; | |||||
int drm_atomic_debugfs_init(struct drm_minor *minor) | |||||
{ | |||||
return drm_debugfs_create_files(drm_atomic_debugfs_list, | |||||
ARRAY_SIZE(drm_atomic_debugfs_list), | |||||
minor->debugfs_root, minor); | |||||
} | |||||
#endif |