diff options
Diffstat (limited to 'drivers/gpu/drm/drm_atomic_uapi.c')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_uapi.c | 1445 |
1 files changed, 1445 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c new file mode 100644 index 000000000..79730fa1d --- /dev/null +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -0,0 +1,1445 @@ +/* + * Copyright (C) 2014 Red Hat + * Copyright (C) 2014 Intel Corp. + * Copyright (C) 2018 Intel Corp. + * Copyright (c) 2020, The Linux Foundation. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: + * Rob Clark <robdclark@gmail.com> + * Daniel Vetter <daniel.vetter@ffwll.ch> + */ + +#include <drm/drm_atomic_uapi.h> +#include <drm/drm_atomic.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_print.h> +#include <drm/drm_drv.h> +#include <drm/drm_writeback.h> +#include <drm/drm_vblank.h> + +#include <linux/dma-fence.h> +#include <linux/uaccess.h> +#include <linux/sync_file.h> +#include <linux/file.h> + +#include "drm_crtc_internal.h" + +/** + * DOC: overview + * + * This file contains the marshalling and demarshalling glue for the atomic UAPI + * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and + * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and + * drivers which have special needs to construct their own atomic updates, e.g. + * for load detect or similar. + */ + +/** + * drm_atomic_set_mode_for_crtc - set mode for CRTC + * @state: the CRTC whose incoming state to update + * @mode: kernel-internal mode to use for the CRTC, or NULL to disable + * + * Set a mode (originating from the kernel) on the desired CRTC state and update + * the enable property. + * + * RETURNS: + * Zero on success, error code on failure. Cannot return -EDEADLK. + */ +int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, + const struct drm_display_mode *mode) +{ + struct drm_crtc *crtc = state->crtc; + struct drm_mode_modeinfo umode; + + /* Early return for no change. */ + if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) + return 0; + + drm_property_blob_put(state->mode_blob); + state->mode_blob = NULL; + + if (mode) { + struct drm_property_blob *blob; + + drm_mode_convert_to_umode(&umode, mode); + blob = drm_property_create_blob(crtc->dev, + sizeof(umode), &umode); + if (IS_ERR(blob)) + return PTR_ERR(blob); + + drm_mode_copy(&state->mode, mode); + + state->mode_blob = blob; + state->enable = true; + drm_dbg_atomic(crtc->dev, + "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", + mode->name, crtc->base.id, crtc->name, state); + } else { + memset(&state->mode, 0, sizeof(state->mode)); + state->enable = false; + drm_dbg_atomic(crtc->dev, + "Set [NOMODE] for [CRTC:%d:%s] state %p\n", + crtc->base.id, crtc->name, state); + } + + return 0; +} +EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); + +/** + * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC + * @state: the CRTC whose incoming state to update + * @blob: pointer to blob property to use for mode + * + * Set a mode (originating from a blob property) on the desired CRTC state. + * This function will take a reference on the blob property for the CRTC state, + * and release the reference held on the state's existing mode property, if any + * was set. + * + * RETURNS: + * Zero on success, error code on failure. Cannot return -EDEADLK. + */ +int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, + struct drm_property_blob *blob) +{ + struct drm_crtc *crtc = state->crtc; + + if (blob == state->mode_blob) + return 0; + + drm_property_blob_put(state->mode_blob); + state->mode_blob = NULL; + + memset(&state->mode, 0, sizeof(state->mode)); + + if (blob) { + int ret; + + if (blob->length != sizeof(struct drm_mode_modeinfo)) { + drm_dbg_atomic(crtc->dev, + "[CRTC:%d:%s] bad mode blob length: %zu\n", + crtc->base.id, crtc->name, + blob->length); + return -EINVAL; + } + + ret = drm_mode_convert_umode(crtc->dev, + &state->mode, blob->data); + if (ret) { + drm_dbg_atomic(crtc->dev, + "[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n", + crtc->base.id, crtc->name, + ret, drm_get_mode_status_name(state->mode.status)); + drm_mode_debug_printmodeline(&state->mode); + return -EINVAL; + } + + state->mode_blob = drm_property_blob_get(blob); + state->enable = true; + drm_dbg_atomic(crtc->dev, + "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", + state->mode.name, crtc->base.id, crtc->name, + state); + } else { + state->enable = false; + drm_dbg_atomic(crtc->dev, + "Set [NOMODE] for [CRTC:%d:%s] state %p\n", + crtc->base.id, crtc->name, state); + } + + return 0; +} +EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); + +/** + * drm_atomic_set_crtc_for_plane - set CRTC for plane + * @plane_state: the plane whose incoming state to update + * @crtc: CRTC to use for the plane + * + * Changing the assigned CRTC for a plane requires us to grab the lock and state + * for the new CRTC, as needed. This function takes care of all these details + * besides updating the pointer in the state object itself. + * + * 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_set_crtc_for_plane(struct drm_plane_state *plane_state, + struct drm_crtc *crtc) +{ + struct drm_plane *plane = plane_state->plane; + struct drm_crtc_state *crtc_state; + /* Nothing to do for same crtc*/ + if (plane_state->crtc == crtc) + return 0; + if (plane_state->crtc) { + crtc_state = drm_atomic_get_crtc_state(plane_state->state, + plane_state->crtc); + if (WARN_ON(IS_ERR(crtc_state))) + return PTR_ERR(crtc_state); + + crtc_state->plane_mask &= ~drm_plane_mask(plane); + } + + plane_state->crtc = crtc; + + if (crtc) { + crtc_state = drm_atomic_get_crtc_state(plane_state->state, + crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + crtc_state->plane_mask |= drm_plane_mask(plane); + } + + if (crtc) + drm_dbg_atomic(plane->dev, + "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", + plane->base.id, plane->name, plane_state, + crtc->base.id, crtc->name); + else + drm_dbg_atomic(plane->dev, + "Link [PLANE:%d:%s] state %p to [NOCRTC]\n", + plane->base.id, plane->name, plane_state); + + return 0; +} +EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); + +/** + * drm_atomic_set_fb_for_plane - set framebuffer for plane + * @plane_state: atomic state object for the plane + * @fb: fb to use for the plane + * + * Changing the assigned framebuffer for a plane requires us to grab a reference + * to the new fb and drop the reference to the old fb, if there is one. This + * function takes care of all these details besides updating the pointer in the + * state object itself. + */ +void +drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, + struct drm_framebuffer *fb) +{ + struct drm_plane *plane = plane_state->plane; + + if (fb) + drm_dbg_atomic(plane->dev, + "Set [FB:%d] for [PLANE:%d:%s] state %p\n", + fb->base.id, plane->base.id, plane->name, + plane_state); + else + drm_dbg_atomic(plane->dev, + "Set [NOFB] for [PLANE:%d:%s] state %p\n", + plane->base.id, plane->name, plane_state); + + drm_framebuffer_assign(&plane_state->fb, fb); +} +EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); + +/** + * drm_atomic_set_crtc_for_connector - set CRTC for connector + * @conn_state: atomic state object for the connector + * @crtc: CRTC to use for the connector + * + * Changing the assigned CRTC for a connector requires us to grab the lock and + * state for the new CRTC, as needed. This function takes care of all these + * details besides updating the pointer in the state object itself. + * + * 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_set_crtc_for_connector(struct drm_connector_state *conn_state, + struct drm_crtc *crtc) +{ + struct drm_connector *connector = conn_state->connector; + struct drm_crtc_state *crtc_state; + + if (conn_state->crtc == crtc) + return 0; + + if (conn_state->crtc) { + crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, + conn_state->crtc); + + crtc_state->connector_mask &= + ~drm_connector_mask(conn_state->connector); + + drm_connector_put(conn_state->connector); + conn_state->crtc = NULL; + } + + if (crtc) { + crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + + crtc_state->connector_mask |= + drm_connector_mask(conn_state->connector); + + drm_connector_get(conn_state->connector); + conn_state->crtc = crtc; + + drm_dbg_atomic(connector->dev, + "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", + connector->base.id, connector->name, + conn_state, crtc->base.id, crtc->name); + } else { + drm_dbg_atomic(connector->dev, + "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", + connector->base.id, connector->name, + conn_state); + } + + return 0; +} +EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); + +static void set_out_fence_for_crtc(struct drm_atomic_state *state, + struct drm_crtc *crtc, s32 __user *fence_ptr) +{ + state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; +} + +static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, + struct drm_crtc *crtc) +{ + s32 __user *fence_ptr; + + fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; + state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; + + return fence_ptr; +} + +static int set_out_fence_for_connector(struct drm_atomic_state *state, + struct drm_connector *connector, + s32 __user *fence_ptr) +{ + unsigned int index = drm_connector_index(connector); + + if (!fence_ptr) + return 0; + + if (put_user(-1, fence_ptr)) + return -EFAULT; + + state->connectors[index].out_fence_ptr = fence_ptr; + + return 0; +} + +static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, + struct drm_connector *connector) +{ + unsigned int index = drm_connector_index(connector); + s32 __user *fence_ptr; + + fence_ptr = state->connectors[index].out_fence_ptr; + state->connectors[index].out_fence_ptr = NULL; + + return fence_ptr; +} + +static int +drm_atomic_replace_property_blob_from_id(struct drm_device *dev, + struct drm_property_blob **blob, + uint64_t blob_id, + ssize_t expected_size, + ssize_t expected_elem_size, + bool *replaced) +{ + struct drm_property_blob *new_blob = NULL; + + if (blob_id != 0) { + new_blob = drm_property_lookup_blob(dev, blob_id); + if (new_blob == NULL) + return -EINVAL; + + if (expected_size > 0 && + new_blob->length != expected_size) { + drm_property_blob_put(new_blob); + return -EINVAL; + } + if (expected_elem_size > 0 && + new_blob->length % expected_elem_size != 0) { + drm_property_blob_put(new_blob); + return -EINVAL; + } + } + + *replaced |= drm_property_replace_blob(blob, new_blob); + drm_property_blob_put(new_blob); + + return 0; +} + +static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, + struct drm_crtc_state *state, struct drm_property *property, + uint64_t val) +{ + struct drm_device *dev = crtc->dev; + struct drm_mode_config *config = &dev->mode_config; + bool replaced = false; + int ret; + + if (property == config->prop_active) + state->active = val; + else if (property == config->prop_mode_id) { + struct drm_property_blob *mode = + drm_property_lookup_blob(dev, val); + ret = drm_atomic_set_mode_prop_for_crtc(state, mode); + drm_property_blob_put(mode); + return ret; + } else if (property == config->prop_vrr_enabled) { + state->vrr_enabled = val; + } else if (property == config->degamma_lut_property) { + ret = drm_atomic_replace_property_blob_from_id(dev, + &state->degamma_lut, + val, + -1, sizeof(struct drm_color_lut), + &replaced); + state->color_mgmt_changed |= replaced; + return ret; + } else if (property == config->ctm_property) { + ret = drm_atomic_replace_property_blob_from_id(dev, + &state->ctm, + val, + sizeof(struct drm_color_ctm), -1, + &replaced); + state->color_mgmt_changed |= replaced; + return ret; + } else if (property == config->gamma_lut_property) { + ret = drm_atomic_replace_property_blob_from_id(dev, + &state->gamma_lut, + val, + -1, sizeof(struct drm_color_lut), + &replaced); + state->color_mgmt_changed |= replaced; + return ret; + } else if (property == config->prop_out_fence_ptr) { + s32 __user *fence_ptr = u64_to_user_ptr(val); + + if (!fence_ptr) + return 0; + + if (put_user(-1, fence_ptr)) + return -EFAULT; + + set_out_fence_for_crtc(state->state, crtc, fence_ptr); + } else if (property == crtc->scaling_filter_property) { + state->scaling_filter = val; + } else if (crtc->funcs->atomic_set_property) { + return crtc->funcs->atomic_set_property(crtc, state, property, val); + } else { + drm_dbg_atomic(crtc->dev, + "[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n", + crtc->base.id, crtc->name, + property->base.id, property->name); + return -EINVAL; + } + + return 0; +} + +static int +drm_atomic_crtc_get_property(struct drm_crtc *crtc, + const struct drm_crtc_state *state, + struct drm_property *property, uint64_t *val) +{ + struct drm_device *dev = crtc->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (property == config->prop_active) + *val = drm_atomic_crtc_effectively_active(state); + else if (property == config->prop_mode_id) + *val = (state->mode_blob) ? state->mode_blob->base.id : 0; + else if (property == config->prop_vrr_enabled) + *val = state->vrr_enabled; + else if (property == config->degamma_lut_property) + *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; + else if (property == config->ctm_property) + *val = (state->ctm) ? state->ctm->base.id : 0; + else if (property == config->gamma_lut_property) + *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; + else if (property == config->prop_out_fence_ptr) + *val = 0; + else if (property == crtc->scaling_filter_property) + *val = state->scaling_filter; + else if (crtc->funcs->atomic_get_property) + return crtc->funcs->atomic_get_property(crtc, state, property, val); + else + return -EINVAL; + + return 0; +} + +static int drm_atomic_plane_set_property(struct drm_plane *plane, + struct drm_plane_state *state, struct drm_file *file_priv, + struct drm_property *property, uint64_t val) +{ + struct drm_device *dev = plane->dev; + struct drm_mode_config *config = &dev->mode_config; + bool replaced = false; + int ret; + + if (property == config->prop_fb_id) { + struct drm_framebuffer *fb; + + fb = drm_framebuffer_lookup(dev, file_priv, val); + drm_atomic_set_fb_for_plane(state, fb); + if (fb) + drm_framebuffer_put(fb); + } else if (property == config->prop_in_fence_fd) { + if (state->fence) + return -EINVAL; + + if (U642I64(val) == -1) + return 0; + + state->fence = sync_file_get_fence(val); + if (!state->fence) + return -EINVAL; + + } else if (property == config->prop_crtc_id) { + struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); + + if (val && !crtc) + return -EACCES; + return drm_atomic_set_crtc_for_plane(state, crtc); + } else if (property == config->prop_crtc_x) { + state->crtc_x = U642I64(val); + } else if (property == config->prop_crtc_y) { + state->crtc_y = U642I64(val); + } else if (property == config->prop_crtc_w) { + state->crtc_w = val; + } else if (property == config->prop_crtc_h) { + state->crtc_h = val; + } else if (property == config->prop_src_x) { + state->src_x = val; + } else if (property == config->prop_src_y) { + state->src_y = val; + } else if (property == config->prop_src_w) { + state->src_w = val; + } else if (property == config->prop_src_h) { + state->src_h = val; + } else if (property == plane->alpha_property) { + state->alpha = val; + } else if (property == plane->blend_mode_property) { + state->pixel_blend_mode = val; + } else if (property == plane->rotation_property) { + if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { + drm_dbg_atomic(plane->dev, + "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", + plane->base.id, plane->name, val); + return -EINVAL; + } + state->rotation = val; + } else if (property == plane->zpos_property) { + state->zpos = val; + } else if (property == plane->color_encoding_property) { + state->color_encoding = val; + } else if (property == plane->color_range_property) { + state->color_range = val; + } else if (property == config->prop_fb_damage_clips) { + ret = drm_atomic_replace_property_blob_from_id(dev, + &state->fb_damage_clips, + val, + -1, + sizeof(struct drm_rect), + &replaced); + return ret; + } else if (property == plane->scaling_filter_property) { + state->scaling_filter = val; + } else if (plane->funcs->atomic_set_property) { + return plane->funcs->atomic_set_property(plane, state, + property, val); + } else { + drm_dbg_atomic(plane->dev, + "[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n", + plane->base.id, plane->name, + property->base.id, property->name); + return -EINVAL; + } + + return 0; +} + +static int +drm_atomic_plane_get_property(struct drm_plane *plane, + const struct drm_plane_state *state, + struct drm_property *property, uint64_t *val) +{ + struct drm_device *dev = plane->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (property == config->prop_fb_id) { + *val = (state->fb) ? state->fb->base.id : 0; + } else if (property == config->prop_in_fence_fd) { + *val = -1; + } else if (property == config->prop_crtc_id) { + *val = (state->crtc) ? state->crtc->base.id : 0; + } else if (property == config->prop_crtc_x) { + *val = I642U64(state->crtc_x); + } else if (property == config->prop_crtc_y) { + *val = I642U64(state->crtc_y); + } else if (property == config->prop_crtc_w) { + *val = state->crtc_w; + } else if (property == config->prop_crtc_h) { + *val = state->crtc_h; + } else if (property == config->prop_src_x) { + *val = state->src_x; + } else if (property == config->prop_src_y) { + *val = state->src_y; + } else if (property == config->prop_src_w) { + *val = state->src_w; + } else if (property == config->prop_src_h) { + *val = state->src_h; + } else if (property == plane->alpha_property) { + *val = state->alpha; + } else if (property == plane->blend_mode_property) { + *val = state->pixel_blend_mode; + } else if (property == plane->rotation_property) { + *val = state->rotation; + } else if (property == plane->zpos_property) { + *val = state->zpos; + } else if (property == plane->color_encoding_property) { + *val = state->color_encoding; + } else if (property == plane->color_range_property) { + *val = state->color_range; + } else if (property == config->prop_fb_damage_clips) { + *val = (state->fb_damage_clips) ? + state->fb_damage_clips->base.id : 0; + } else if (property == plane->scaling_filter_property) { + *val = state->scaling_filter; + } else if (plane->funcs->atomic_get_property) { + return plane->funcs->atomic_get_property(plane, state, property, val); + } else { + return -EINVAL; + } + + return 0; +} + +static int drm_atomic_set_writeback_fb_for_connector( + struct drm_connector_state *conn_state, + struct drm_framebuffer *fb) +{ + int ret; + struct drm_connector *conn = conn_state->connector; + + ret = drm_writeback_set_fb(conn_state, fb); + if (ret < 0) + return ret; + + if (fb) + drm_dbg_atomic(conn->dev, + "Set [FB:%d] for connector state %p\n", + fb->base.id, conn_state); + else + drm_dbg_atomic(conn->dev, + "Set [NOFB] for connector state %p\n", + conn_state); + + return 0; +} + +static int drm_atomic_connector_set_property(struct drm_connector *connector, + struct drm_connector_state *state, struct drm_file *file_priv, + struct drm_property *property, uint64_t val) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *config = &dev->mode_config; + bool replaced = false; + int ret; + + if (property == config->prop_crtc_id) { + struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); + + if (val && !crtc) + return -EACCES; + return drm_atomic_set_crtc_for_connector(state, crtc); + } else if (property == config->dpms_property) { + /* setting DPMS property requires special handling, which + * is done in legacy setprop path for us. Disallow (for + * now?) atomic writes to DPMS property: + */ + return -EINVAL; + } else if (property == config->tv_select_subconnector_property) { + state->tv.subconnector = val; + } else if (property == config->tv_left_margin_property) { + state->tv.margins.left = val; + } else if (property == config->tv_right_margin_property) { + state->tv.margins.right = val; + } else if (property == config->tv_top_margin_property) { + state->tv.margins.top = val; + } else if (property == config->tv_bottom_margin_property) { + state->tv.margins.bottom = val; + } else if (property == config->tv_mode_property) { + state->tv.mode = val; + } else if (property == config->tv_brightness_property) { + state->tv.brightness = val; + } else if (property == config->tv_contrast_property) { + state->tv.contrast = val; + } else if (property == config->tv_flicker_reduction_property) { + state->tv.flicker_reduction = val; + } else if (property == config->tv_overscan_property) { + state->tv.overscan = val; + } else if (property == config->tv_saturation_property) { + state->tv.saturation = val; + } else if (property == config->tv_hue_property) { + state->tv.hue = val; + } else if (property == config->link_status_property) { + /* Never downgrade from GOOD to BAD on userspace's request here, + * only hw issues can do that. + * + * For an atomic property the userspace doesn't need to be able + * to understand all the properties, but needs to be able to + * restore the state it wants on VT switch. So if the userspace + * tries to change the link_status from GOOD to BAD, driver + * silently rejects it and returns a 0. This prevents userspace + * from accidentally breaking the display when it restores the + * state. + */ + if (state->link_status != DRM_LINK_STATUS_GOOD) + state->link_status = val; + } else if (property == config->hdr_output_metadata_property) { + ret = drm_atomic_replace_property_blob_from_id(dev, + &state->hdr_output_metadata, + val, + sizeof(struct hdr_output_metadata), -1, + &replaced); + return ret; + } else if (property == config->aspect_ratio_property) { + state->picture_aspect_ratio = val; + } else if (property == config->content_type_property) { + state->content_type = val; + } else if (property == connector->scaling_mode_property) { + state->scaling_mode = val; + } else if (property == config->content_protection_property) { + if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { + drm_dbg_kms(dev, "only drivers can set CP Enabled\n"); + return -EINVAL; + } + state->content_protection = val; + } else if (property == config->hdcp_content_type_property) { + state->hdcp_content_type = val; + } else if (property == connector->colorspace_property) { + state->colorspace = val; + } else if (property == config->writeback_fb_id_property) { + struct drm_framebuffer *fb; + int ret; + + fb = drm_framebuffer_lookup(dev, file_priv, val); + ret = drm_atomic_set_writeback_fb_for_connector(state, fb); + if (fb) + drm_framebuffer_put(fb); + return ret; + } else if (property == config->writeback_out_fence_ptr_property) { + s32 __user *fence_ptr = u64_to_user_ptr(val); + + return set_out_fence_for_connector(state->state, connector, + fence_ptr); + } else if (property == connector->max_bpc_property) { + state->max_requested_bpc = val; + } else if (property == connector->privacy_screen_sw_state_property) { + state->privacy_screen_sw_state = val; + } else if (connector->funcs->atomic_set_property) { + return connector->funcs->atomic_set_property(connector, + state, property, val); + } else { + drm_dbg_atomic(connector->dev, + "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n", + connector->base.id, connector->name, + property->base.id, property->name); + return -EINVAL; + } + + return 0; +} + +static int +drm_atomic_connector_get_property(struct drm_connector *connector, + const struct drm_connector_state *state, + struct drm_property *property, uint64_t *val) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (property == config->prop_crtc_id) { + *val = (state->crtc) ? state->crtc->base.id : 0; + } else if (property == config->dpms_property) { + if (state->crtc && state->crtc->state->self_refresh_active) + *val = DRM_MODE_DPMS_ON; + else + *val = connector->dpms; + } else if (property == config->tv_select_subconnector_property) { + *val = state->tv.subconnector; + } else if (property == config->tv_left_margin_property) { + *val = state->tv.margins.left; + } else if (property == config->tv_right_margin_property) { + *val = state->tv.margins.right; + } else if (property == config->tv_top_margin_property) { + *val = state->tv.margins.top; + } else if (property == config->tv_bottom_margin_property) { + *val = state->tv.margins.bottom; + } else if (property == config->tv_mode_property) { + *val = state->tv.mode; + } else if (property == config->tv_brightness_property) { + *val = state->tv.brightness; + } else if (property == config->tv_contrast_property) { + *val = state->tv.contrast; + } else if (property == config->tv_flicker_reduction_property) { + *val = state->tv.flicker_reduction; + } else if (property == config->tv_overscan_property) { + *val = state->tv.overscan; + } else if (property == config->tv_saturation_property) { + *val = state->tv.saturation; + } else if (property == config->tv_hue_property) { + *val = state->tv.hue; + } else if (property == config->link_status_property) { + *val = state->link_status; + } else if (property == config->aspect_ratio_property) { + *val = state->picture_aspect_ratio; + } else if (property == config->content_type_property) { + *val = state->content_type; + } else if (property == connector->colorspace_property) { + *val = state->colorspace; + } else if (property == connector->scaling_mode_property) { + *val = state->scaling_mode; + } else if (property == config->hdr_output_metadata_property) { + *val = state->hdr_output_metadata ? + state->hdr_output_metadata->base.id : 0; + } else if (property == config->content_protection_property) { + *val = state->content_protection; + } else if (property == config->hdcp_content_type_property) { + *val = state->hdcp_content_type; + } else if (property == config->writeback_fb_id_property) { + /* Writeback framebuffer is one-shot, write and forget */ + *val = 0; + } else if (property == config->writeback_out_fence_ptr_property) { + *val = 0; + } else if (property == connector->max_bpc_property) { + *val = state->max_requested_bpc; + } else if (property == connector->privacy_screen_sw_state_property) { + *val = state->privacy_screen_sw_state; + } else if (connector->funcs->atomic_get_property) { + return connector->funcs->atomic_get_property(connector, + state, property, val); + } else { + return -EINVAL; + } + + return 0; +} + +int drm_atomic_get_property(struct drm_mode_object *obj, + struct drm_property *property, uint64_t *val) +{ + struct drm_device *dev = property->dev; + int ret; + + switch (obj->type) { + case DRM_MODE_OBJECT_CONNECTOR: { + struct drm_connector *connector = obj_to_connector(obj); + + WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); + ret = drm_atomic_connector_get_property(connector, + connector->state, property, val); + break; + } + case DRM_MODE_OBJECT_CRTC: { + struct drm_crtc *crtc = obj_to_crtc(obj); + + WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); + ret = drm_atomic_crtc_get_property(crtc, + crtc->state, property, val); + break; + } + case DRM_MODE_OBJECT_PLANE: { + struct drm_plane *plane = obj_to_plane(obj); + + WARN_ON(!drm_modeset_is_locked(&plane->mutex)); + ret = drm_atomic_plane_get_property(plane, + plane->state, property, val); + break; + } + default: + ret = -EINVAL; + break; + } + + return ret; +} + +/* + * The big monster ioctl + */ + +static struct drm_pending_vblank_event *create_vblank_event( + struct drm_crtc *crtc, uint64_t user_data) +{ + struct drm_pending_vblank_event *e = NULL; + + e = kzalloc(sizeof *e, GFP_KERNEL); + if (!e) + return NULL; + + e->event.base.type = DRM_EVENT_FLIP_COMPLETE; + e->event.base.length = sizeof(e->event); + e->event.vbl.crtc_id = crtc->base.id; + e->event.vbl.user_data = user_data; + + return e; +} + +int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, + struct drm_connector *connector, + int mode) +{ + struct drm_connector *tmp_connector; + struct drm_connector_state *new_conn_state; + struct drm_crtc *crtc; + struct drm_crtc_state *crtc_state; + int i, ret, old_mode = connector->dpms; + bool active = false; + + ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, + state->acquire_ctx); + if (ret) + return ret; + + if (mode != DRM_MODE_DPMS_ON) + mode = DRM_MODE_DPMS_OFF; + connector->dpms = mode; + + crtc = connector->state->crtc; + if (!crtc) + goto out; + ret = drm_atomic_add_affected_connectors(state, crtc); + if (ret) + goto out; + + crtc_state = drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(crtc_state)) { + ret = PTR_ERR(crtc_state); + goto out; + } + + for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { + if (new_conn_state->crtc != crtc) + continue; + if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { + active = true; + break; + } + } + + crtc_state->active = active; + ret = drm_atomic_commit(state); +out: + if (ret != 0) + connector->dpms = old_mode; + return ret; +} + +int drm_atomic_set_property(struct drm_atomic_state *state, + struct drm_file *file_priv, + struct drm_mode_object *obj, + struct drm_property *prop, + uint64_t prop_value) +{ + struct drm_mode_object *ref; + int ret; + + if (!drm_property_change_valid_get(prop, prop_value, &ref)) + return -EINVAL; + + switch (obj->type) { + case DRM_MODE_OBJECT_CONNECTOR: { + struct drm_connector *connector = obj_to_connector(obj); + struct drm_connector_state *connector_state; + + connector_state = drm_atomic_get_connector_state(state, connector); + if (IS_ERR(connector_state)) { + ret = PTR_ERR(connector_state); + break; + } + + ret = drm_atomic_connector_set_property(connector, + connector_state, file_priv, + prop, prop_value); + break; + } + case DRM_MODE_OBJECT_CRTC: { + struct drm_crtc *crtc = obj_to_crtc(obj); + struct drm_crtc_state *crtc_state; + + crtc_state = drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(crtc_state)) { + ret = PTR_ERR(crtc_state); + break; + } + + ret = drm_atomic_crtc_set_property(crtc, + crtc_state, prop, prop_value); + break; + } + case DRM_MODE_OBJECT_PLANE: { + struct drm_plane *plane = obj_to_plane(obj); + struct drm_plane_state *plane_state; + + plane_state = drm_atomic_get_plane_state(state, plane); + if (IS_ERR(plane_state)) { + ret = PTR_ERR(plane_state); + break; + } + + ret = drm_atomic_plane_set_property(plane, + plane_state, file_priv, + prop, prop_value); + break; + } + default: + ret = -EINVAL; + break; + } + + drm_property_change_valid_put(prop, ref); + return ret; +} + +/** + * DOC: explicit fencing properties + * + * Explicit fencing allows userspace to control the buffer synchronization + * between devices. A Fence or a group of fences are transferred to/from + * userspace using Sync File fds and there are two DRM properties for that. + * IN_FENCE_FD on each DRM Plane to send fences to the kernel and + * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. + * + * As a contrast, with implicit fencing the kernel keeps track of any + * ongoing rendering, and automatically ensures that the atomic update waits + * for any pending rendering to complete. This is usually tracked in &struct + * dma_resv which can also contain mandatory kernel fences. Implicit syncing + * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit + * fencing is what Android wants. + * + * "IN_FENCE_FD”: + * Use this property to pass a fence that DRM should wait on before + * proceeding with the Atomic Commit request and show the framebuffer for + * the plane on the screen. The fence can be either a normal fence or a + * merged one, the sync_file framework will handle both cases and use a + * fence_array if a merged fence is received. Passing -1 here means no + * fences to wait on. + * + * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag + * it will only check if the Sync File is a valid one. + * + * On the driver side the fence is stored on the @fence parameter of + * &struct drm_plane_state. Drivers which also support implicit fencing + * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(), + * to make sure there's consistent behaviour between drivers in precedence + * of implicit vs. explicit fencing. + * + * "OUT_FENCE_PTR”: + * Use this property to pass a file descriptor pointer to DRM. Once the + * Atomic Commit request call returns OUT_FENCE_PTR will be filled with + * the file descriptor number of a Sync File. This Sync File contains the + * CRTC fence that will be signaled when all framebuffers present on the + * Atomic Commit * request for that given CRTC are scanned out on the + * screen. + * + * The Atomic Commit request fails if a invalid pointer is passed. If the + * Atomic Commit request fails for any other reason the out fence fd + * returned will be -1. On a Atomic Commit with the + * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. + * + * Note that out-fences don't have a special interface to drivers and are + * internally represented by a &struct drm_pending_vblank_event in struct + * &drm_crtc_state, which is also used by the nonblocking atomic commit + * helpers and for the DRM event handling for existing userspace. + */ + +struct drm_out_fence_state { + s32 __user *out_fence_ptr; + struct sync_file *sync_file; + int fd; +}; + +static int setup_out_fence(struct drm_out_fence_state *fence_state, + struct dma_fence *fence) +{ + fence_state->fd = get_unused_fd_flags(O_CLOEXEC); + if (fence_state->fd < 0) + return fence_state->fd; + + if (put_user(fence_state->fd, fence_state->out_fence_ptr)) + return -EFAULT; + + fence_state->sync_file = sync_file_create(fence); + if (!fence_state->sync_file) + return -ENOMEM; + + return 0; +} + +static int prepare_signaling(struct drm_device *dev, + struct drm_atomic_state *state, + struct drm_mode_atomic *arg, + struct drm_file *file_priv, + struct drm_out_fence_state **fence_state, + unsigned int *num_fences) +{ + struct drm_crtc *crtc; + struct drm_crtc_state *crtc_state; + struct drm_connector *conn; + struct drm_connector_state *conn_state; + int i, c = 0, ret; + + if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) + return 0; + + for_each_new_crtc_in_state(state, crtc, crtc_state, i) { + s32 __user *fence_ptr; + + fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); + + if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { + struct drm_pending_vblank_event *e; + + e = create_vblank_event(crtc, arg->user_data); + if (!e) + return -ENOMEM; + + crtc_state->event = e; + } + + if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { + struct drm_pending_vblank_event *e = crtc_state->event; + + if (!file_priv) + continue; + + ret = drm_event_reserve_init(dev, file_priv, &e->base, + &e->event.base); + if (ret) { + kfree(e); + crtc_state->event = NULL; + return ret; + } + } + + if (fence_ptr) { + struct dma_fence *fence; + struct drm_out_fence_state *f; + + f = krealloc(*fence_state, sizeof(**fence_state) * + (*num_fences + 1), GFP_KERNEL); + if (!f) + return -ENOMEM; + + memset(&f[*num_fences], 0, sizeof(*f)); + + f[*num_fences].out_fence_ptr = fence_ptr; + *fence_state = f; + + fence = drm_crtc_create_fence(crtc); + if (!fence) + return -ENOMEM; + + ret = setup_out_fence(&f[(*num_fences)++], fence); + if (ret) { + dma_fence_put(fence); + return ret; + } + + crtc_state->event->base.fence = fence; + } + + c++; + } + + for_each_new_connector_in_state(state, conn, conn_state, i) { + struct drm_writeback_connector *wb_conn; + struct drm_out_fence_state *f; + struct dma_fence *fence; + s32 __user *fence_ptr; + + if (!conn_state->writeback_job) + continue; + + fence_ptr = get_out_fence_for_connector(state, conn); + if (!fence_ptr) + continue; + + f = krealloc(*fence_state, sizeof(**fence_state) * + (*num_fences + 1), GFP_KERNEL); + if (!f) + return -ENOMEM; + + memset(&f[*num_fences], 0, sizeof(*f)); + + f[*num_fences].out_fence_ptr = fence_ptr; + *fence_state = f; + + wb_conn = drm_connector_to_writeback(conn); + fence = drm_writeback_get_out_fence(wb_conn); + if (!fence) + return -ENOMEM; + + ret = setup_out_fence(&f[(*num_fences)++], fence); + if (ret) { + dma_fence_put(fence); + return ret; + } + + conn_state->writeback_job->out_fence = fence; + } + + /* + * Having this flag means user mode pends on event which will never + * reach due to lack of at least one CRTC for signaling + */ + if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) + return -EINVAL; + + return 0; +} + +static void complete_signaling(struct drm_device *dev, + struct drm_atomic_state *state, + struct drm_out_fence_state *fence_state, + unsigned int num_fences, + bool install_fds) +{ + struct drm_crtc *crtc; + struct drm_crtc_state *crtc_state; + int i; + + if (install_fds) { + for (i = 0; i < num_fences; i++) + fd_install(fence_state[i].fd, + fence_state[i].sync_file->file); + + kfree(fence_state); + return; + } + + for_each_new_crtc_in_state(state, crtc, crtc_state, i) { + struct drm_pending_vblank_event *event = crtc_state->event; + /* + * Free the allocated event. drm_atomic_helper_setup_commit + * can allocate an event too, so only free it if it's ours + * to prevent a double free in drm_atomic_state_clear. + */ + if (event && (event->base.fence || event->base.file_priv)) { + drm_event_cancel_free(dev, &event->base); + crtc_state->event = NULL; + } + } + + if (!fence_state) + return; + + for (i = 0; i < num_fences; i++) { + if (fence_state[i].sync_file) + fput(fence_state[i].sync_file->file); + if (fence_state[i].fd >= 0) + put_unused_fd(fence_state[i].fd); + + /* If this fails log error to the user */ + if (fence_state[i].out_fence_ptr && + put_user(-1, fence_state[i].out_fence_ptr)) + drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n"); + } + + kfree(fence_state); +} + +int drm_mode_atomic_ioctl(struct drm_device *dev, + void *data, struct drm_file *file_priv) +{ + struct drm_mode_atomic *arg = data; + uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); + uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); + uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); + uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); + unsigned int copied_objs, copied_props; + struct drm_atomic_state *state; + struct drm_modeset_acquire_ctx ctx; + struct drm_out_fence_state *fence_state; + int ret = 0; + unsigned int i, j, num_fences; + + /* disallow for drivers not supporting atomic: */ + if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) + return -EOPNOTSUPP; + + /* disallow for userspace that has not enabled atomic cap (even + * though this may be a bit overkill, since legacy userspace + * wouldn't know how to call this ioctl) + */ + if (!file_priv->atomic) { + drm_dbg_atomic(dev, + "commit failed: atomic cap not enabled\n"); + return -EINVAL; + } + + if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) { + drm_dbg_atomic(dev, "commit failed: invalid flag\n"); + return -EINVAL; + } + + if (arg->reserved) { + drm_dbg_atomic(dev, "commit failed: reserved field set\n"); + return -EINVAL; + } + + if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) { + drm_dbg_atomic(dev, + "commit failed: invalid flag DRM_MODE_PAGE_FLIP_ASYNC\n"); + return -EINVAL; + } + + /* can't test and expect an event at the same time. */ + if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && + (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { + drm_dbg_atomic(dev, + "commit failed: page-flip event requested with test-only commit\n"); + return -EINVAL; + } + + state = drm_atomic_state_alloc(dev); + if (!state) + return -ENOMEM; + + drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); + state->acquire_ctx = &ctx; + state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); + +retry: + copied_objs = 0; + copied_props = 0; + fence_state = NULL; + num_fences = 0; + + for (i = 0; i < arg->count_objs; i++) { + uint32_t obj_id, count_props; + struct drm_mode_object *obj; + + if (get_user(obj_id, objs_ptr + copied_objs)) { + ret = -EFAULT; + goto out; + } + + obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); + if (!obj) { + ret = -ENOENT; + goto out; + } + + if (!obj->properties) { + drm_mode_object_put(obj); + ret = -ENOENT; + goto out; + } + + if (get_user(count_props, count_props_ptr + copied_objs)) { + drm_mode_object_put(obj); + ret = -EFAULT; + goto out; + } + + copied_objs++; + + for (j = 0; j < count_props; j++) { + uint32_t prop_id; + uint64_t prop_value; + struct drm_property *prop; + + if (get_user(prop_id, props_ptr + copied_props)) { + drm_mode_object_put(obj); + ret = -EFAULT; + goto out; + } + + prop = drm_mode_obj_find_prop_id(obj, prop_id); + if (!prop) { + drm_mode_object_put(obj); + ret = -ENOENT; + goto out; + } + + if (copy_from_user(&prop_value, + prop_values_ptr + copied_props, + sizeof(prop_value))) { + drm_mode_object_put(obj); + ret = -EFAULT; + goto out; + } + + ret = drm_atomic_set_property(state, file_priv, + obj, prop, prop_value); + if (ret) { + drm_mode_object_put(obj); + goto out; + } + + copied_props++; + } + + drm_mode_object_put(obj); + } + + ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, + &num_fences); + if (ret) + goto out; + + if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { + ret = drm_atomic_check_only(state); + } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { + ret = drm_atomic_nonblocking_commit(state); + } else { + ret = drm_atomic_commit(state); + } + +out: + complete_signaling(dev, state, fence_state, num_fences, !ret); + + if (ret == -EDEADLK) { + drm_atomic_state_clear(state); + ret = drm_modeset_backoff(&ctx); + if (!ret) + goto retry; + } + + drm_atomic_state_put(state); + + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); + + return ret; +} |