diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 957 |
1 files changed, 957 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c new file mode 100644 index 000000000..cb90e70d8 --- /dev/null +++ b/drivers/gpu/drm/drm_crtc.c @@ -0,0 +1,957 @@ +/* + * Copyright (c) 2006-2008 Intel Corporation + * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> + * Copyright (c) 2008 Red Hat Inc. + * + * DRM core CRTC related functions + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + * + * Authors: + * Keith Packard + * Eric Anholt <eric@anholt.net> + * Dave Airlie <airlied@linux.ie> + * Jesse Barnes <jesse.barnes@intel.com> + */ +#include <linux/ctype.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/export.h> +#include <linux/dma-fence.h> +#include <linux/uaccess.h> +#include <drm/drm_blend.h> +#include <drm/drm_crtc.h> +#include <drm/drm_edid.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_managed.h> +#include <drm/drm_modeset_lock.h> +#include <drm/drm_atomic.h> +#include <drm/drm_auth.h> +#include <drm/drm_debugfs_crc.h> +#include <drm/drm_drv.h> +#include <drm/drm_print.h> +#include <drm/drm_file.h> + +#include "drm_crtc_internal.h" +#include "drm_internal.h" + +/** + * DOC: overview + * + * A CRTC represents the overall display pipeline. It receives pixel data from + * &drm_plane and blends them together. The &drm_display_mode is also attached + * to the CRTC, specifying display timings. On the output side the data is fed + * to one or more &drm_encoder, which are then each connected to one + * &drm_connector. + * + * To create a CRTC, a KMS drivers allocates and zeroes an instances of + * &struct drm_crtc (possibly as part of a larger structure) and registers it + * with a call to drm_crtc_init_with_planes(). + * + * The CRTC is also the entry point for legacy modeset operations, see + * &drm_crtc_funcs.set_config, legacy plane operations, see + * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy + * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these + * features are controlled through &drm_property and + * &drm_mode_config_funcs.atomic_check. + */ + +/** + * drm_crtc_from_index - find the registered CRTC at an index + * @dev: DRM device + * @idx: index of registered CRTC to find for + * + * Given a CRTC index, return the registered CRTC from DRM device's + * list of CRTCs with matching index. This is the inverse of drm_crtc_index(). + * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or + * &drm_driver.disable_vblank), since that still deals with indices instead + * of pointers to &struct drm_crtc." + */ +struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx) +{ + struct drm_crtc *crtc; + + drm_for_each_crtc(crtc, dev) + if (idx == crtc->index) + return crtc; + + return NULL; +} +EXPORT_SYMBOL(drm_crtc_from_index); + +int drm_crtc_force_disable(struct drm_crtc *crtc) +{ + struct drm_mode_set set = { + .crtc = crtc, + }; + + WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); + + return drm_mode_set_config_internal(&set); +} + +static unsigned int drm_num_crtcs(struct drm_device *dev) +{ + unsigned int num = 0; + struct drm_crtc *tmp; + + drm_for_each_crtc(tmp, dev) { + num++; + } + + return num; +} + +int drm_crtc_register_all(struct drm_device *dev) +{ + struct drm_crtc *crtc; + int ret = 0; + + drm_for_each_crtc(crtc, dev) { + drm_debugfs_crtc_add(crtc); + + if (crtc->funcs->late_register) + ret = crtc->funcs->late_register(crtc); + if (ret) + return ret; + } + + return 0; +} + +void drm_crtc_unregister_all(struct drm_device *dev) +{ + struct drm_crtc *crtc; + + drm_for_each_crtc(crtc, dev) { + if (crtc->funcs->early_unregister) + crtc->funcs->early_unregister(crtc); + drm_debugfs_crtc_remove(crtc); + } +} + +static int drm_crtc_crc_init(struct drm_crtc *crtc) +{ +#ifdef CONFIG_DEBUG_FS + spin_lock_init(&crtc->crc.lock); + init_waitqueue_head(&crtc->crc.wq); + crtc->crc.source = kstrdup("auto", GFP_KERNEL); + if (!crtc->crc.source) + return -ENOMEM; +#endif + return 0; +} + +static void drm_crtc_crc_fini(struct drm_crtc *crtc) +{ +#ifdef CONFIG_DEBUG_FS + kfree(crtc->crc.source); +#endif +} + +static const struct dma_fence_ops drm_crtc_fence_ops; + +static struct drm_crtc *fence_to_crtc(struct dma_fence *fence) +{ + BUG_ON(fence->ops != &drm_crtc_fence_ops); + return container_of(fence->lock, struct drm_crtc, fence_lock); +} + +static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence) +{ + struct drm_crtc *crtc = fence_to_crtc(fence); + + return crtc->dev->driver->name; +} + +static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence) +{ + struct drm_crtc *crtc = fence_to_crtc(fence); + + return crtc->timeline_name; +} + +static const struct dma_fence_ops drm_crtc_fence_ops = { + .get_driver_name = drm_crtc_fence_get_driver_name, + .get_timeline_name = drm_crtc_fence_get_timeline_name, +}; + +struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc) +{ + struct dma_fence *fence; + + fence = kzalloc(sizeof(*fence), GFP_KERNEL); + if (!fence) + return NULL; + + dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock, + crtc->fence_context, ++crtc->fence_seqno); + + return fence; +} + +/** + * DOC: standard CRTC properties + * + * DRM CRTCs have a few standardized properties: + * + * ACTIVE: + * Atomic property for setting the power state of the CRTC. When set to 1 + * the CRTC will actively display content. When set to 0 the CRTC will be + * powered off. There is no expectation that user-space will reset CRTC + * resources like the mode and planes when setting ACTIVE to 0. + * + * User-space can rely on an ACTIVE change to 1 to never fail an atomic + * test as long as no other property has changed. If a change to ACTIVE + * fails an atomic test, this is a driver bug. For this reason setting + * ACTIVE to 0 must not release internal resources (like reserved memory + * bandwidth or clock generators). + * + * Note that the legacy DPMS property on connectors is internally routed + * to control this property for atomic drivers. + * MODE_ID: + * Atomic property for setting the CRTC display timings. The value is the + * ID of a blob containing the DRM mode info. To disable the CRTC, + * user-space must set this property to 0. + * + * Setting MODE_ID to 0 will release reserved resources for the CRTC. + * SCALING_FILTER: + * Atomic property for setting the scaling filter for CRTC scaler + * + * The value of this property can be one of the following: + * + * Default: + * Driver's default scaling filter + * Nearest Neighbor: + * Nearest Neighbor scaling filter + */ + +__printf(6, 0) +static int __drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, + struct drm_plane *primary, + struct drm_plane *cursor, + const struct drm_crtc_funcs *funcs, + const char *name, va_list ap) +{ + struct drm_mode_config *config = &dev->mode_config; + int ret; + + WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); + WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); + + /* crtc index is used with 32bit bitmasks */ + if (WARN_ON(config->num_crtc >= 32)) + return -EINVAL; + + WARN_ON(drm_drv_uses_atomic_modeset(dev) && + (!funcs->atomic_destroy_state || + !funcs->atomic_duplicate_state)); + + crtc->dev = dev; + crtc->funcs = funcs; + + INIT_LIST_HEAD(&crtc->commit_list); + spin_lock_init(&crtc->commit_lock); + + drm_modeset_lock_init(&crtc->mutex); + ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); + if (ret) + return ret; + + if (name) { + crtc->name = kvasprintf(GFP_KERNEL, name, ap); + } else { + crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", + drm_num_crtcs(dev)); + } + if (!crtc->name) { + drm_mode_object_unregister(dev, &crtc->base); + return -ENOMEM; + } + + crtc->fence_context = dma_fence_context_alloc(1); + spin_lock_init(&crtc->fence_lock); + snprintf(crtc->timeline_name, sizeof(crtc->timeline_name), + "CRTC:%d-%s", crtc->base.id, crtc->name); + + crtc->base.properties = &crtc->properties; + + list_add_tail(&crtc->head, &config->crtc_list); + crtc->index = config->num_crtc++; + + crtc->primary = primary; + crtc->cursor = cursor; + if (primary && !primary->possible_crtcs) + primary->possible_crtcs = drm_crtc_mask(crtc); + if (cursor && !cursor->possible_crtcs) + cursor->possible_crtcs = drm_crtc_mask(crtc); + + ret = drm_crtc_crc_init(crtc); + if (ret) { + drm_mode_object_unregister(dev, &crtc->base); + return ret; + } + + if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { + drm_object_attach_property(&crtc->base, config->prop_active, 0); + drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); + drm_object_attach_property(&crtc->base, + config->prop_out_fence_ptr, 0); + drm_object_attach_property(&crtc->base, + config->prop_vrr_enabled, 0); + } + + return 0; +} + +/** + * drm_crtc_init_with_planes - Initialise a new CRTC object with + * specified primary and cursor planes. + * @dev: DRM device + * @crtc: CRTC object to init + * @primary: Primary plane for CRTC + * @cursor: Cursor plane for CRTC + * @funcs: callbacks for the new CRTC + * @name: printf style format string for the CRTC name, or NULL for default name + * + * Inits a new object created as base part of a driver crtc object. Drivers + * should use this function instead of drm_crtc_init(), which is only provided + * for backwards compatibility with drivers which do not yet support universal + * planes). For really simple hardware which has only 1 plane look at + * drm_simple_display_pipe_init() instead. + * The &drm_crtc_funcs.destroy hook should call drm_crtc_cleanup() and kfree() + * the crtc structure. The crtc structure should not be allocated with + * devm_kzalloc(). + * + * The @primary and @cursor planes are only relevant for legacy uAPI, see + * &drm_crtc.primary and &drm_crtc.cursor. + * + * Note: consider using drmm_crtc_alloc_with_planes() or + * drmm_crtc_init_with_planes() instead of drm_crtc_init_with_planes() + * to let the DRM managed resource infrastructure take care of cleanup + * and deallocation. + * + * Returns: + * Zero on success, error code on failure. + */ +int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, + struct drm_plane *primary, + struct drm_plane *cursor, + const struct drm_crtc_funcs *funcs, + const char *name, ...) +{ + va_list ap; + int ret; + + WARN_ON(!funcs->destroy); + + va_start(ap, name); + ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, + name, ap); + va_end(ap); + + return ret; +} +EXPORT_SYMBOL(drm_crtc_init_with_planes); + +static void drmm_crtc_init_with_planes_cleanup(struct drm_device *dev, + void *ptr) +{ + struct drm_crtc *crtc = ptr; + + drm_crtc_cleanup(crtc); +} + +__printf(6, 0) +static int __drmm_crtc_init_with_planes(struct drm_device *dev, + struct drm_crtc *crtc, + struct drm_plane *primary, + struct drm_plane *cursor, + const struct drm_crtc_funcs *funcs, + const char *name, + va_list args) +{ + int ret; + + drm_WARN_ON(dev, funcs && funcs->destroy); + + ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, + name, args); + if (ret) + return ret; + + ret = drmm_add_action_or_reset(dev, drmm_crtc_init_with_planes_cleanup, + crtc); + if (ret) + return ret; + + return 0; +} + +/** + * drmm_crtc_init_with_planes - Initialise a new CRTC object with + * specified primary and cursor planes. + * @dev: DRM device + * @crtc: CRTC object to init + * @primary: Primary plane for CRTC + * @cursor: Cursor plane for CRTC + * @funcs: callbacks for the new CRTC + * @name: printf style format string for the CRTC name, or NULL for default name + * + * Inits a new object created as base part of a driver crtc object. Drivers + * should use this function instead of drm_crtc_init(), which is only provided + * for backwards compatibility with drivers which do not yet support universal + * planes). For really simple hardware which has only 1 plane look at + * drm_simple_display_pipe_init() instead. + * + * Cleanup is automatically handled through registering + * drmm_crtc_cleanup() with drmm_add_action(). The crtc structure should + * be allocated with drmm_kzalloc(). + * + * The @drm_crtc_funcs.destroy hook must be NULL. + * + * The @primary and @cursor planes are only relevant for legacy uAPI, see + * &drm_crtc.primary and &drm_crtc.cursor. + * + * Returns: + * Zero on success, error code on failure. + */ +int drmm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, + struct drm_plane *primary, + struct drm_plane *cursor, + const struct drm_crtc_funcs *funcs, + const char *name, ...) +{ + va_list ap; + int ret; + + va_start(ap, name); + ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, + name, ap); + va_end(ap); + if (ret) + return ret; + + return 0; +} +EXPORT_SYMBOL(drmm_crtc_init_with_planes); + +void *__drmm_crtc_alloc_with_planes(struct drm_device *dev, + size_t size, size_t offset, + struct drm_plane *primary, + struct drm_plane *cursor, + const struct drm_crtc_funcs *funcs, + const char *name, ...) +{ + void *container; + struct drm_crtc *crtc; + va_list ap; + int ret; + + if (WARN_ON(!funcs || funcs->destroy)) + return ERR_PTR(-EINVAL); + + container = drmm_kzalloc(dev, size, GFP_KERNEL); + if (!container) + return ERR_PTR(-ENOMEM); + + crtc = container + offset; + + va_start(ap, name); + ret = __drmm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs, + name, ap); + va_end(ap); + if (ret) + return ERR_PTR(ret); + + return container; +} +EXPORT_SYMBOL(__drmm_crtc_alloc_with_planes); + +/** + * drm_crtc_cleanup - Clean up the core crtc usage + * @crtc: CRTC to cleanup + * + * This function cleans up @crtc and removes it from the DRM mode setting + * core. Note that the function does *not* free the crtc structure itself, + * this is the responsibility of the caller. + */ +void drm_crtc_cleanup(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + + /* Note that the crtc_list is considered to be static; should we + * remove the drm_crtc at runtime we would have to decrement all + * the indices on the drm_crtc after us in the crtc_list. + */ + + drm_crtc_crc_fini(crtc); + + kfree(crtc->gamma_store); + crtc->gamma_store = NULL; + + drm_modeset_lock_fini(&crtc->mutex); + + drm_mode_object_unregister(dev, &crtc->base); + list_del(&crtc->head); + dev->mode_config.num_crtc--; + + WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); + if (crtc->state && crtc->funcs->atomic_destroy_state) + crtc->funcs->atomic_destroy_state(crtc, crtc->state); + + kfree(crtc->name); + + memset(crtc, 0, sizeof(*crtc)); +} +EXPORT_SYMBOL(drm_crtc_cleanup); + +/** + * 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_unlock(&plane->mutex); + + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state) { + if (crtc->state->enable) { + drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); + crtc_resp->mode_valid = 1; + } else { + crtc_resp->mode_valid = 0; + } + } else { + crtc_resp->x = crtc->x; + crtc_resp->y = crtc->y; + + if (crtc->enabled) { + drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); + crtc_resp->mode_valid = 1; + + } else { + crtc_resp->mode_valid = 0; + } + } + if (!file_priv->aspect_ratio_allowed) + crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; + drm_modeset_unlock(&crtc->mutex); + + return 0; +} + +static int __drm_mode_set_config_internal(struct drm_mode_set *set, + struct drm_modeset_acquire_ctx *ctx) +{ + struct drm_crtc *crtc = set->crtc; + struct drm_framebuffer *fb; + struct drm_crtc *tmp; + int ret; + + WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); + + /* + * NOTE: ->set_config can also disable other crtcs (if we steal all + * connectors from it), hence we need to refcount the fbs across all + * crtcs. Atomic modeset will have saner semantics ... + */ + drm_for_each_crtc(tmp, crtc->dev) { + struct drm_plane *plane = tmp->primary; + + plane->old_fb = plane->fb; + } + + fb = set->fb; + + ret = crtc->funcs->set_config(set, ctx); + if (ret == 0) { + struct drm_plane *plane = crtc->primary; + + plane->crtc = fb ? crtc : NULL; + plane->fb = fb; + } + + drm_for_each_crtc(tmp, crtc->dev) { + struct drm_plane *plane = tmp->primary; + + if (plane->fb) + drm_framebuffer_get(plane->fb); + if (plane->old_fb) + drm_framebuffer_put(plane->old_fb); + plane->old_fb = NULL; + } + + return ret; +} + +/** + * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config + * @set: modeset config to set + * + * This is a little helper to wrap internal calls to the + * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is + * correct refcounting dance. + * + * This should only be used by non-atomic legacy drivers. + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_mode_set_config_internal(struct drm_mode_set *set) +{ + WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev)); + + return __drm_mode_set_config_internal(set, NULL); +} +EXPORT_SYMBOL(drm_mode_set_config_internal); + +/** + * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the + * CRTC viewport + * @crtc: CRTC that framebuffer will be displayed on + * @x: x panning + * @y: y panning + * @mode: mode that framebuffer will be displayed under + * @fb: framebuffer to check size of + */ +int drm_crtc_check_viewport(const struct drm_crtc *crtc, + int x, int y, + const struct drm_display_mode *mode, + const struct drm_framebuffer *fb) + +{ + int hdisplay, vdisplay; + + drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay); + + if (crtc->state && + drm_rotation_90_or_270(crtc->primary->state->rotation)) + swap(hdisplay, vdisplay); + + return drm_framebuffer_check_src_coords(x << 16, y << 16, + hdisplay << 16, vdisplay << 16, + fb); +} +EXPORT_SYMBOL(drm_crtc_check_viewport); + +/** + * drm_mode_setcrtc - set CRTC configuration + * @dev: drm device for the ioctl + * @data: data pointer for the ioctl + * @file_priv: drm file for the ioctl call + * + * Build a new CRTC configuration based on user request. + * + * Called by the user via ioctl. + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_mode_setcrtc(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_mode_config *config = &dev->mode_config; + struct drm_mode_crtc *crtc_req = data; + struct drm_crtc *crtc; + struct drm_plane *plane; + struct drm_connector **connector_set = NULL, *connector; + struct drm_framebuffer *fb = NULL; + struct drm_display_mode *mode = NULL; + struct drm_mode_set set; + uint32_t __user *set_connectors_ptr; + struct drm_modeset_acquire_ctx ctx; + int ret, i, num_connectors = 0; + + if (!drm_core_check_feature(dev, DRIVER_MODESET)) + return -EOPNOTSUPP; + + /* + * Universal plane src offsets are only 16.16, prevent havoc for + * drivers using universal plane code internally. + */ + if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) + return -ERANGE; + + crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id); + if (!crtc) { + DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); + return -ENOENT; + } + DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); + + plane = crtc->primary; + + /* allow disabling with the primary plane leased */ + if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id)) + return -EACCES; + + DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, + DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret); + + if (crtc_req->mode_valid) { + /* If we have a mode we need a framebuffer. */ + /* If we pass -1, set the mode with the currently bound fb */ + if (crtc_req->fb_id == -1) { + struct drm_framebuffer *old_fb; + + if (plane->state) + old_fb = plane->state->fb; + else + old_fb = plane->fb; + + if (!old_fb) { + DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); + ret = -EINVAL; + goto out; + } + + fb = old_fb; + /* Make refcounting symmetric with the lookup path. */ + drm_framebuffer_get(fb); + } else { + fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id); + if (!fb) { + DRM_DEBUG_KMS("Unknown FB ID%d\n", + crtc_req->fb_id); + ret = -ENOENT; + goto out; + } + } + + mode = drm_mode_create(dev); + if (!mode) { + ret = -ENOMEM; + goto out; + } + if (!file_priv->aspect_ratio_allowed && + (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) { + DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n"); + ret = -EINVAL; + goto out; + } + + + ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode); + if (ret) { + DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n", + ret, drm_get_mode_status_name(mode->status)); + drm_mode_debug_printmodeline(mode); + goto out; + } + + /* + * Check whether the primary plane supports the fb pixel format. + * Drivers not implementing the universal planes API use a + * default formats list provided by the DRM core which doesn't + * match real hardware capabilities. Skip the check in that + * case. + */ + if (!plane->format_default) { + ret = drm_plane_check_pixel_format(plane, + fb->format->format, + fb->modifier); + if (ret) { + DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n", + &fb->format->format, + fb->modifier); + goto out; + } + } + + ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, + mode, fb); + if (ret) + goto out; + + } + + if (crtc_req->count_connectors == 0 && mode) { + DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); + ret = -EINVAL; + goto out; + } + + if (crtc_req->count_connectors > 0 && (!mode || !fb)) { + DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", + crtc_req->count_connectors); + ret = -EINVAL; + goto out; + } + + if (crtc_req->count_connectors > 0) { + u32 out_id; + + /* Avoid unbounded kernel memory allocation */ + if (crtc_req->count_connectors > config->num_connector) { + ret = -EINVAL; + goto out; + } + + connector_set = kmalloc_array(crtc_req->count_connectors, + sizeof(struct drm_connector *), + GFP_KERNEL); + if (!connector_set) { + ret = -ENOMEM; + goto out; + } + + for (i = 0; i < crtc_req->count_connectors; i++) { + connector_set[i] = NULL; + set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; + if (get_user(out_id, &set_connectors_ptr[i])) { + ret = -EFAULT; + goto out; + } + + connector = drm_connector_lookup(dev, file_priv, out_id); + if (!connector) { + DRM_DEBUG_KMS("Connector id %d unknown\n", + out_id); + ret = -ENOENT; + goto out; + } + DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", + connector->base.id, + connector->name); + + connector_set[i] = connector; + num_connectors++; + } + } + + set.crtc = crtc; + set.x = crtc_req->x; + set.y = crtc_req->y; + set.mode = mode; + set.connectors = connector_set; + set.num_connectors = num_connectors; + set.fb = fb; + + if (drm_drv_uses_atomic_modeset(dev)) + ret = crtc->funcs->set_config(&set, &ctx); + else + ret = __drm_mode_set_config_internal(&set, &ctx); + +out: + if (fb) + drm_framebuffer_put(fb); + + if (connector_set) { + for (i = 0; i < num_connectors; i++) { + if (connector_set[i]) + drm_connector_put(connector_set[i]); + } + } + kfree(connector_set); + drm_mode_destroy(dev, mode); + + /* In case we need to retry... */ + connector_set = NULL; + fb = NULL; + mode = NULL; + + DRM_MODESET_LOCK_ALL_END(dev, ctx, ret); + + return ret; +} + +int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, + struct drm_property *property, + uint64_t value) +{ + int ret = -EINVAL; + struct drm_crtc *crtc = obj_to_crtc(obj); + + if (crtc->funcs->set_property) + ret = crtc->funcs->set_property(crtc, property, value); + if (!ret) + drm_object_property_set_value(obj, property, value); + + return ret; +} + +/** + * drm_crtc_create_scaling_filter_property - create a new scaling filter + * property + * + * @crtc: drm CRTC + * @supported_filters: bitmask of supported scaling filters, must include + * BIT(DRM_SCALING_FILTER_DEFAULT). + * + * This function lets driver to enable the scaling filter property on a given + * CRTC. + * + * RETURNS: + * Zero for success or -errno + */ +int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, + unsigned int supported_filters) +{ + struct drm_property *prop = + drm_create_scaling_filter_prop(crtc->dev, supported_filters); + + if (IS_ERR(prop)) + return PTR_ERR(prop); + + drm_object_attach_property(&crtc->base, prop, + DRM_SCALING_FILTER_DEFAULT); + crtc->scaling_filter_property = prop; + + return 0; +} +EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property); |