/**
* 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;
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->crtc_states[index] = crtc_state;
state->crtcs[index] = crtc;
crtc_state->state = state;
DRM_DEBUG_ATOMIC("Added [CRTC:%d] %p state to %p\n",
crtc->base.id, crtc_state, state);
return crtc_state;
}
/**
* drm_modeset_lock_all_ctx - take all modeset locks
* @dev: DRM device
* @ctx: lock acquisition context
*
* This function takes all modeset locks, suitable where a more fine-grained
* scheme isn't (yet) implemented.
*
* Unlike drm_modeset_lock_all(), it doesn't take the dev->mode_config.mutex
* since that lock isn't required for modeset state changes. Callers which
* need to grab that lock too need to do so outside of the acquire context
* @ctx.
*
* Locks acquired with this function should be released by calling the
* drm_modeset_drop_locks() function on @ctx.
*
* Returns: 0 on success or a negative error-code on failure.
*/
int drm_modeset_lock_all_ctx(struct drm_device *dev,
struct drm_modeset_acquire_ctx *ctx)
{
struct drm_crtc *crtc;
struct drm_plane *plane;
int ret;
ret = drm_modeset_lock(&dev->mode_config.connection_mutex, ctx);
if (ret)
return ret;
drm_for_each_crtc(crtc, dev) {
ret = drm_modeset_lock(&crtc->mutex, ctx);
if (ret)
return ret;
}
int drm_mode_getencoder(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_get_encoder *enc_resp = data;
struct drm_encoder *encoder;
struct drm_crtc *crtc;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
encoder = drm_encoder_find(dev, enc_resp->encoder_id);
if (!encoder)
return -ENOENT;
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
crtc = drm_encoder_get_crtc(encoder);
if (crtc)
enc_resp->crtc_id = crtc->base.id;
else
enc_resp->crtc_id = 0;
drm_modeset_unlock(&dev->mode_config.connection_mutex);
enc_resp->encoder_type = encoder->encoder_type;
enc_resp->encoder_id = encoder->base.id;
enc_resp->possible_crtcs = encoder->possible_crtcs;
enc_resp->possible_clones = encoder->possible_clones;
return 0;
}
struct mdp5_state *mdp5_get_state(struct drm_atomic_state *s)
{
struct msm_drm_private *priv = s->dev->dev_private;
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
struct msm_kms_state *state = to_kms_state(s);
struct mdp5_state *new_state;
int ret;
if (state->state)
return state->state;
ret = drm_modeset_lock(&mdp5_kms->state_lock, s->acquire_ctx);
if (ret)
return ERR_PTR(ret);
new_state = kmalloc(sizeof(*mdp5_kms->state), GFP_KERNEL);
if (!new_state)
return ERR_PTR(-ENOMEM);
/* Copy state: */
new_state->hwpipe = mdp5_kms->state->hwpipe;
new_state->hwmixer = mdp5_kms->state->hwmixer;
if (mdp5_kms->smp)
new_state->smp = mdp5_kms->state->smp;
state->state = new_state;
return new_state;
}
/**
* drm_mode_getcrtc - get CRTC configuration
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
* @file_priv: drm file for the ioctl call
*
* Construct a CRTC configuration structure to return to the user.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_getcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
struct drm_mode_crtc *crtc_resp = data;
struct drm_crtc *crtc;
struct drm_plane *plane;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EOPNOTSUPP;
crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
if (!crtc)
return -ENOENT;
plane = crtc->primary;
crtc_resp->gamma_size = crtc->gamma_size;
drm_modeset_lock(&plane->mutex, NULL);
if (plane->state && plane->state->fb)
crtc_resp->fb_id = plane->state->fb->base.id;
else if (!plane->state && plane->fb)
crtc_resp->fb_id = plane->fb->base.id;
else
crtc_resp->fb_id = 0;
if (plane->state) {
crtc_resp->x = plane->state->src_x >> 16;
crtc_resp->y = plane->state->src_y >> 16;
}
/**
* drm_modeset_lock_crtc - lock crtc with hidden acquire ctx for a plane update
* @crtc: DRM CRTC
* @plane: DRM plane to be updated on @crtc
*
* This function locks the given crtc and plane (which should be either the
* primary or cursor plane) using a hidden acquire context. This is necessary so
* that drivers internally using the atomic interfaces can grab further locks
* with the lock acquire context.
*
* Note that @plane can be NULL, e.g. when the cursor support hasn't yet been
* converted to universal planes yet.
*/
void drm_modeset_lock_crtc(struct drm_crtc *crtc,
struct drm_plane *plane)
{
struct drm_modeset_acquire_ctx *ctx;
int ret;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (WARN_ON(!ctx))
return;
drm_modeset_acquire_init(ctx, 0);
retry:
ret = drm_modeset_lock(&crtc->mutex, ctx);
if (ret)
goto fail;
if (plane) {
ret = drm_modeset_lock(&plane->mutex, ctx);
if (ret)
goto fail;
if (plane->crtc) {
ret = drm_modeset_lock(&plane->crtc->mutex, ctx);
if (ret)
goto fail;
}
}
WARN_ON(crtc->acquire_ctx);
/* now we hold the locks, so now that it is safe, stash the
* ctx for drm_modeset_unlock_crtc():
*/
crtc->acquire_ctx = ctx;
return;
fail:
if (ret == -EDEADLK) {
drm_modeset_backoff(ctx);
goto retry;
}
}
int drm_mode_getplane(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_get_plane *plane_resp = data;
struct drm_plane *plane;
uint32_t __user *format_ptr;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EOPNOTSUPP;
plane = drm_plane_find(dev, file_priv, plane_resp->plane_id);
if (!plane)
return -ENOENT;
drm_modeset_lock(&plane->mutex, NULL);
if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id))
plane_resp->crtc_id = plane->state->crtc->base.id;
else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id))
plane_resp->crtc_id = plane->crtc->base.id;
else
plane_resp->crtc_id = 0;
if (plane->state && plane->state->fb)
plane_resp->fb_id = plane->state->fb->base.id;
else if (!plane->state && plane->fb)
plane_resp->fb_id = plane->fb->base.id;
else
plane_resp->fb_id = 0;
drm_modeset_unlock(&plane->mutex);
plane_resp->plane_id = plane->base.id;
plane_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
plane->possible_crtcs);
plane_resp->gamma_size = 0;
/*
* This ioctl is called twice, once to determine how much space is
* needed, and the 2nd time to fill it.
*/
if (plane->format_count &&
(plane_resp->count_format_types >= plane->format_count)) {
format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
if (copy_to_user(format_ptr,
plane->format_types,
sizeof(uint32_t) * plane->format_count)) {
return -EFAULT;
}
}
plane_resp->count_format_types = plane->format_count;
return 0;
}
/*
* This acquires the modeset lock set aside for global state, creates
* a new duplicated private object state.
*/
struct mdp5_global_state *mdp5_get_global_state(struct drm_atomic_state *s)
{
struct msm_drm_private *priv = s->dev->dev_private;
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
struct drm_private_state *priv_state;
int ret;
ret = drm_modeset_lock(&mdp5_kms->glob_state_lock, s->acquire_ctx);
if (ret)
return ERR_PTR(ret);
priv_state = drm_atomic_get_private_obj_state(s, &mdp5_kms->glob_state);
if (IS_ERR(priv_state))
return ERR_CAST(priv_state);
return to_mdp5_global_state(priv_state);
}
/**
* 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;
}
static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
struct drm_connector *connector)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct drm_i915_private *dev_priv = to_i915(connector->dev);
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
drm_connector_unregister(connector);
if (dev_priv->fbdev)
drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
connector);
/* prevent race with the check in ->detect */
drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
intel_connector->mst_port = NULL;
drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
drm_connector_unreference(connector);
}
/**
* 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;
struct drm_plane_state *plane_state;
index = drm_plane_index(plane);
if (state->plane_states[index])
return state->plane_states[index];
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->plane_states[index] = plane_state;
state->planes[index] = plane;
plane_state->state = state;
DRM_DEBUG_ATOMIC("Added [PLANE:%d] %p state to %p\n",
plane->base.id, 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;
}
drm_for_each_plane(plane, dev) {
ret = drm_modeset_lock(&plane->mutex, ctx);
if (ret)
return ret;
}
static int pipe_crc_set_source(struct drm_i915_private *dev_priv,
enum pipe pipe,
enum intel_pipe_crc_source source)
{
struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
enum intel_display_power_domain power_domain;
u32 val = 0; /* shut up gcc */
int ret;
if (pipe_crc->source == source)
return 0;
/* forbid changing the source without going back to 'none' */
if (pipe_crc->source && source)
return -EINVAL;
power_domain = POWER_DOMAIN_PIPE(pipe);
if (!intel_display_power_get_if_enabled(dev_priv, power_domain)) {
DRM_DEBUG_KMS("Trying to capture CRC while pipe is off\n");
return -EIO;
}
ret = get_new_crc_ctl_reg(dev_priv, pipe, &source, &val);
if (ret != 0)
goto out;
/* none -> real source transition */
if (source) {
struct intel_pipe_crc_entry *entries;
DRM_DEBUG_DRIVER("collecting CRCs for pipe %c, %s\n",
pipe_name(pipe), pipe_crc_source_name(source));
entries = kcalloc(INTEL_PIPE_CRC_ENTRIES_NR,
sizeof(pipe_crc->entries[0]),
GFP_KERNEL);
if (!entries) {
ret = -ENOMEM;
goto out;
}
/*
* When IPS gets enabled, the pipe CRC changes. Since IPS gets
* enabled and disabled dynamically based on package C states,
* user space can't make reliable use of the CRCs, so let's just
* completely disable it.
*/
hsw_disable_ips(crtc);
spin_lock_irq(&pipe_crc->lock);
kfree(pipe_crc->entries);
pipe_crc->entries = entries;
pipe_crc->head = 0;
pipe_crc->tail = 0;
spin_unlock_irq(&pipe_crc->lock);
}
pipe_crc->source = source;
I915_WRITE(PIPE_CRC_CTL(pipe), val);
POSTING_READ(PIPE_CRC_CTL(pipe));
/* real source -> none transition */
if (!source) {
struct intel_pipe_crc_entry *entries;
struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv,
pipe);
DRM_DEBUG_DRIVER("stopping CRCs for pipe %c\n",
pipe_name(pipe));
drm_modeset_lock(&crtc->base.mutex, NULL);
if (crtc->base.state->active)
intel_wait_for_vblank(dev_priv, pipe);
drm_modeset_unlock(&crtc->base.mutex);
spin_lock_irq(&pipe_crc->lock);
entries = pipe_crc->entries;
pipe_crc->entries = NULL;
pipe_crc->head = 0;
pipe_crc->tail = 0;
spin_unlock_irq(&pipe_crc->lock);
kfree(entries);
if (IS_G4X(dev_priv))
g4x_undo_pipe_scramble_reset(dev_priv, pipe);
else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
vlv_undo_pipe_scramble_reset(dev_priv, pipe);
else if (IS_HASWELL(dev_priv) && pipe == PIPE_A)
hsw_trans_edp_pipe_A_crc_wa(dev_priv, false);
hsw_enable_ips(crtc);
}
ret = 0;
out:
intel_display_power_put(dev_priv, power_domain);
return ret;
}
static int drm_mode_cursor_universal(struct drm_crtc *crtc,
struct drm_mode_cursor2 *req,
struct drm_file *file_priv,
struct drm_modeset_acquire_ctx *ctx)
{
struct drm_device *dev = crtc->dev;
struct drm_plane *plane = crtc->cursor;
struct drm_framebuffer *fb = NULL;
struct drm_mode_fb_cmd2 fbreq = {
.width = req->width,
.height = req->height,
.pixel_format = DRM_FORMAT_ARGB8888,
.pitches = { req->width * 4 },
.handles = { req->handle },
};
int32_t crtc_x, crtc_y;
uint32_t crtc_w = 0, crtc_h = 0;
uint32_t src_w = 0, src_h = 0;
int ret = 0;
BUG_ON(!plane);
WARN_ON(plane->crtc != crtc && plane->crtc != NULL);
/*
* Obtain fb we'll be using (either new or existing) and take an extra
* reference to it if fb != null. setplane will take care of dropping
* the reference if the plane update fails.
*/
if (req->flags & DRM_MODE_CURSOR_BO) {
if (req->handle) {
fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
if (IS_ERR(fb)) {
DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
return PTR_ERR(fb);
}
fb->hot_x = req->hot_x;
fb->hot_y = req->hot_y;
} else {
fb = NULL;
}
} else {
if (plane->state)
fb = plane->state->fb;
else
fb = plane->fb;
if (fb)
drm_framebuffer_get(fb);
}
if (req->flags & DRM_MODE_CURSOR_MOVE) {
crtc_x = req->x;
crtc_y = req->y;
} else {
crtc_x = crtc->cursor_x;
crtc_y = crtc->cursor_y;
}
if (fb) {
crtc_w = fb->width;
crtc_h = fb->height;
src_w = fb->width << 16;
src_h = fb->height << 16;
}
if (drm_drv_uses_atomic_modeset(dev))
ret = __setplane_atomic(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
0, 0, src_w, src_h, ctx);
else
ret = __setplane_internal(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
0, 0, src_w, src_h, ctx);
if (fb)
drm_framebuffer_put(fb);
/* Update successful; save new cursor position, if necessary */
if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
crtc->cursor_x = req->x;
crtc->cursor_y = req->y;
}
return ret;
}
static int drm_mode_cursor_common(struct drm_device *dev,
struct drm_mode_cursor2 *req,
struct drm_file *file_priv)
{
struct drm_crtc *crtc;
struct drm_modeset_acquire_ctx ctx;
int ret = 0;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EOPNOTSUPP;
if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
return -EINVAL;
crtc = drm_crtc_find(dev, file_priv, req->crtc_id);
if (!crtc) {
DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
return -ENOENT;
}
drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
retry:
ret = drm_modeset_lock(&crtc->mutex, &ctx);
if (ret)
goto out;
/*
* If this crtc has a universal cursor plane, call that plane's update
* handler rather than using legacy cursor handlers.
*/
if (crtc->cursor) {
ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
if (ret)
goto out;
ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx);
goto out;
}
if (req->flags & DRM_MODE_CURSOR_BO) {
if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
ret = -ENXIO;
goto out;
}
/* Turns off the cursor if handle is 0 */
if (crtc->funcs->cursor_set2)
ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
req->width, req->height, req->hot_x, req->hot_y);
else
ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
req->width, req->height);
}
if (req->flags & DRM_MODE_CURSOR_MOVE) {
if (crtc->funcs->cursor_move) {
ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
} else {
ret = -EFAULT;
goto out;
}
}
out:
if (ret == -EDEADLK) {
ret = drm_modeset_backoff(&ctx);
if (!ret)
goto retry;
}
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
return ret;
}
int drm_mode_cursor_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
struct drm_mode_cursor *req = data;
struct drm_mode_cursor2 new_req;
memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
new_req.hot_x = new_req.hot_y = 0;
return drm_mode_cursor_common(dev, &new_req, file_priv);
}
/*
* Set the cursor configuration based on user request. This implements the 2nd
* version of the cursor ioctl, which allows userspace to additionally specify
* the hotspot of the pointer.
*/
int drm_mode_cursor2_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
struct drm_mode_cursor2 *req = data;
return drm_mode_cursor_common(dev, req, file_priv);
}
int drm_mode_page_flip_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
struct drm_mode_crtc_page_flip_target *page_flip = data;
struct drm_crtc *crtc;
struct drm_plane *plane;
struct drm_framebuffer *fb = NULL, *old_fb;
struct drm_pending_vblank_event *e = NULL;
u32 target_vblank = page_flip->sequence;
struct drm_modeset_acquire_ctx ctx;
int ret = -EINVAL;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EOPNOTSUPP;
if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS)
return -EINVAL;
if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET))
return -EINVAL;
/* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags
* can be specified
*/
if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET)
return -EINVAL;
if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
return -EINVAL;
crtc = drm_crtc_find(dev, file_priv, page_flip->crtc_id);
if (!crtc)
return -ENOENT;
plane = crtc->primary;
if (crtc->funcs->page_flip_target) {
u32 current_vblank;
int r;
r = drm_crtc_vblank_get(crtc);
if (r)
return r;
current_vblank = (u32)drm_crtc_vblank_count(crtc);
switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
if ((int)(target_vblank - current_vblank) > 1) {
DRM_DEBUG("Invalid absolute flip target %u, "
"must be <= %u\n", target_vblank,
current_vblank + 1);
drm_crtc_vblank_put(crtc);
return -EINVAL;
}
break;
case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE:
if (target_vblank != 0 && target_vblank != 1) {
DRM_DEBUG("Invalid relative flip target %u, "
"must be 0 or 1\n", target_vblank);
drm_crtc_vblank_put(crtc);
return -EINVAL;
}
target_vblank += current_vblank;
break;
default:
target_vblank = current_vblank +
!(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC);
break;
}
} else if (crtc->funcs->page_flip == NULL ||
(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) {
return -EINVAL;
}
drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
retry:
ret = drm_modeset_lock(&crtc->mutex, &ctx);
if (ret)
goto out;
ret = drm_modeset_lock(&plane->mutex, &ctx);
if (ret)
goto out;
if (plane->state)
old_fb = plane->state->fb;
else
old_fb = plane->fb;
if (old_fb == NULL) {
/* The framebuffer is currently unbound, presumably
* due to a hotplug event, that userspace has not
* yet discovered.
*/
ret = -EBUSY;
goto out;
}
fb = drm_framebuffer_lookup(dev, file_priv, page_flip->fb_id);
if (!fb) {
ret = -ENOENT;
goto out;
}
if (plane->state) {
const struct drm_plane_state *state = plane->state;
ret = drm_framebuffer_check_src_coords(state->src_x,
state->src_y,
state->src_w,
state->src_h,
fb);
} else {
ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y,
&crtc->mode, fb);
}
if (ret)
goto out;
if (old_fb->format != fb->format) {
DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
ret = -EINVAL;
goto out;
}
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
e = kzalloc(sizeof *e, GFP_KERNEL);
if (!e) {
ret = -ENOMEM;
goto out;
}
e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
e->event.base.length = sizeof(e->event);
e->event.vbl.user_data = page_flip->user_data;
e->event.vbl.crtc_id = crtc->base.id;
ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
if (ret) {
kfree(e);
e = NULL;
goto out;
}
}
plane->old_fb = plane->fb;
if (crtc->funcs->page_flip_target)
ret = crtc->funcs->page_flip_target(crtc, fb, e,
page_flip->flags,
target_vblank,
&ctx);
else
ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags,
&ctx);
if (ret) {
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
drm_event_cancel_free(dev, &e->base);
/* Keep the old fb, don't unref it. */
plane->old_fb = NULL;
} else {
if (!plane->state) {
plane->fb = fb;
drm_framebuffer_get(fb);
}
}
out:
if (fb)
drm_framebuffer_put(fb);
if (plane->old_fb)
drm_framebuffer_put(plane->old_fb);
plane->old_fb = NULL;
if (ret == -EDEADLK) {
ret = drm_modeset_backoff(&ctx);
if (!ret)
goto retry;
}
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
if (ret && crtc->funcs->page_flip_target)
drm_crtc_vblank_put(crtc);
return ret;
}