[Intel-gfx] [PATCH 06/14] drm: extract drm_atomic_uapi.c
Daniel Vetter
daniel at ffwll.ch
Wed Sep 5 07:55:28 UTC 2018
On Tue, Sep 04, 2018 at 01:41:33PM -0700, Rodrigo Vivi wrote:
> Maybe start a new file with SPDX identifier?
>
> I like the idea of this split...
I just checked, none of the other drm files have them. I'm not sure I want
to start this specific bikeshed, so I think I'll leave it as-is.
> Acked-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Thanks, Daniel
>
> > + *
> > + * Authors:
> > + * Rob Clark <robdclark at gmail.com>
> > + * Daniel Vetter <daniel.vetter at ffwll.ch>
> > + */
> > +
> > +#include <drm/drm_atomic_uapi.h>
> > +#include <drm/drm_atomic.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 it's form: 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 similiar.
> > + */
> > +
> > +/**
> > + * 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) {
> > + drm_mode_convert_to_umode(&umode, mode);
> > + state->mode_blob =
> > + drm_property_create_blob(state->crtc->dev,
> > + sizeof(umode),
> > + &umode);
> > + if (IS_ERR(state->mode_blob))
> > + return PTR_ERR(state->mode_blob);
> > +
> > + drm_mode_copy(&state->mode, mode);
> > + state->enable = true;
> > + DRM_DEBUG_ATOMIC("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_DEBUG_ATOMIC("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_DEBUG_ATOMIC("[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_DEBUG_ATOMIC("[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_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
> > + state->mode.name, crtc->base.id, crtc->name,
> > + state);
> > + } else {
> > + state->enable = false;
> > + DRM_DEBUG_ATOMIC("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_DEBUG_ATOMIC("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_DEBUG_ATOMIC("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_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n",
> > + fb->base.id, plane->base.id, plane->name,
> > + plane_state);
> > + else
> > + DRM_DEBUG_ATOMIC("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_fence_for_plane - set fence for plane
> > + * @plane_state: atomic state object for the plane
> > + * @fence: dma_fence to use for the plane
> > + *
> > + * Helper to setup the plane_state fence in case it is not set yet.
> > + * By using this drivers doesn't need to worry if the user choose
> > + * implicit or explicit fencing.
> > + *
> > + * This function will not set the fence to the state if it was set
> > + * via explicit fencing interfaces on the atomic ioctl. In that case it will
> > + * drop the reference to the fence as we are not storing it anywhere.
> > + * Otherwise, if &drm_plane_state.fence is not set this function we just set it
> > + * with the received implicit fence. In both cases this function consumes a
> > + * reference for @fence.
> > + *
> > + * This way explicit fencing can be used to overrule implicit fencing, which is
> > + * important to make explicit fencing use-cases work: One example is using one
> > + * buffer for 2 screens with different refresh rates. Implicit fencing will
> > + * clamp rendering to the refresh rate of the slower screen, whereas explicit
> > + * fence allows 2 independent render and display loops on a single buffer. If a
> > + * driver allows obeys both implicit and explicit fences for plane updates, then
> > + * it will break all the benefits of explicit fencing.
> > + */
> > +void
> > +drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
> > + struct dma_fence *fence)
> > +{
> > + if (plane_state->fence) {
> > + dma_fence_put(fence);
> > + return;
> > + }
> > +
> > + plane_state->fence = fence;
> > +}
> > +EXPORT_SYMBOL(drm_atomic_set_fence_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_DEBUG_ATOMIC("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_DEBUG_ATOMIC("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->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 (crtc->funcs->atomic_set_property) {
> > + return crtc->funcs->atomic_set_property(crtc, state, property, val);
> > + } else {
> > + DRM_DEBUG_ATOMIC("[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 = state->active;
> > + else if (property == config->prop_mode_id)
> > + *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
> > + 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 (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_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) {
> > + struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, 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, NULL, val);
> > + 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_DEBUG_ATOMIC("[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 (plane->funcs->atomic_set_property) {
> > + return plane->funcs->atomic_set_property(plane, state,
> > + property, val);
> > + } else {
> > + DRM_DEBUG_ATOMIC("[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 (plane->funcs->atomic_get_property) {
> > + return plane->funcs->atomic_get_property(plane, state, property, val);
> > + } else {
> > + return -EINVAL;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static struct drm_writeback_job *
> > +drm_atomic_get_writeback_job(struct drm_connector_state *conn_state)
> > +{
> > + WARN_ON(conn_state->connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);
> > +
> > + if (!conn_state->writeback_job)
> > + conn_state->writeback_job =
> > + kzalloc(sizeof(*conn_state->writeback_job), GFP_KERNEL);
> > +
> > + return conn_state->writeback_job;
> > +}
> > +
> > +static int drm_atomic_set_writeback_fb_for_connector(
> > + struct drm_connector_state *conn_state,
> > + struct drm_framebuffer *fb)
> > +{
> > + struct drm_writeback_job *job =
> > + drm_atomic_get_writeback_job(conn_state);
> > + if (!job)
> > + return -ENOMEM;
> > +
> > + drm_framebuffer_assign(&job->fb, fb);
> > +
> > + if (fb)
> > + DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n",
> > + fb->base.id, conn_state);
> > + else
> > + DRM_DEBUG_ATOMIC("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_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) {
> > + struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
> > + 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 accidently breaking the display when it restores the
> > + * state.
> > + */
> > + if (state->link_status != DRM_LINK_STATUS_GOOD)
> > + state->link_status = val;
> > + } 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 == connector->content_protection_property) {
> > + if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
> > + DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
> > + return -EINVAL;
> > + }
> > + state->content_protection = val;
> > + } else if (property == config->writeback_fb_id_property) {
> > + struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
> > + int 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 (connector->funcs->atomic_set_property) {
> > + return connector->funcs->atomic_set_property(connector,
> > + state, property, val);
> > + } else {
> > + DRM_DEBUG_ATOMIC("[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) {
> > + *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->scaling_mode_property) {
> > + *val = state->scaling_mode;
> > + } else if (property == connector->content_protection_property) {
> > + *val = state->content_protection;
> > + } 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 (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_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, 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, 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 transfered 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. For shared buffers represented with
> > + * a &struct dma_buf this is tracked in &struct reservation_object.
> > + * 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 set the implicit fence using drm_atomic_set_fence_for_plane(),
> > + * 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_writeback_job *job;
> > + struct drm_out_fence_state *f;
> > + struct dma_fence *fence;
> > + s32 __user *fence_ptr;
> > +
> > + fence_ptr = get_out_fence_for_connector(state, conn);
> > + if (!fence_ptr)
> > + continue;
> > +
> > + job = drm_atomic_get_writeback_job(conn_state);
> > + if (!job)
> > + return -ENOMEM;
> > +
> > + 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;
> > + }
> > +
> > + 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_DEBUG_ATOMIC("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 -EINVAL;
> > +
> > + /* 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)
> > + return -EINVAL;
> > +
> > + if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
> > + return -EINVAL;
> > +
> > + if (arg->reserved)
> > + return -EINVAL;
> > +
> > + if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
> > + !dev->mode_config.async_page_flip)
> > + 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))
> > + return -EINVAL;
> > +
> > + drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
> > +
> > + state = drm_atomic_state_alloc(dev);
> > + if (!state)
> > + return -ENOMEM;
> > +
> > + 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, 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 {
> > + if (unlikely(drm_debug & DRM_UT_STATE))
> > + drm_atomic_print_state(state);
> > +
> > + 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;
> > +}
> > diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
> > index 5a84c3bc915d..ce75e9506e85 100644
> > --- a/drivers/gpu/drm/drm_crtc_helper.c
> > +++ b/drivers/gpu/drm/drm_crtc_helper.c
> > @@ -35,6 +35,7 @@
> >
> > #include <drm/drmP.h>
> > #include <drm/drm_atomic.h>
> > +#include <drm/drm_atomic_uapi.h>
> > #include <drm/drm_crtc.h>
> > #include <drm/drm_encoder.h>
> > #include <drm/drm_fourcc.h>
> > diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
> > index ff5e0d521c21..ede20b55d50c 100644
> > --- a/drivers/gpu/drm/drm_crtc_internal.h
> > +++ b/drivers/gpu/drm/drm_crtc_internal.h
> > @@ -204,6 +204,9 @@ struct drm_minor;
> > int drm_atomic_debugfs_init(struct drm_minor *minor);
> > #endif
> >
> > +void drm_atomic_print_state(const struct drm_atomic_state *state);
> > +
> > +/* drm_atomic_uapi.c */
> > int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
> > struct drm_connector *connector,
> > int mode);
> > @@ -213,6 +216,8 @@ int drm_atomic_set_property(struct drm_atomic_state *state,
> > uint64_t prop_value);
> > int drm_atomic_get_property(struct drm_mode_object *obj,
> > struct drm_property *property, uint64_t *val);
> > +
> > +/* IOCTL */
> > int drm_mode_atomic_ioctl(struct drm_device *dev,
> > void *data, struct drm_file *file_priv);
> >
> > diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
> > index 781af1d42d76..7ca8c77223cb 100644
> > --- a/drivers/gpu/drm/drm_framebuffer.c
> > +++ b/drivers/gpu/drm/drm_framebuffer.c
> > @@ -25,6 +25,7 @@
> > #include <drm/drm_auth.h>
> > #include <drm/drm_framebuffer.h>
> > #include <drm/drm_atomic.h>
> > +#include <drm/drm_atomic_uapi.h>
> > #include <drm/drm_print.h>
> >
> > #include "drm_internal.h"
> > diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
> > index 2810d4131411..7607f9cd6f77 100644
> > --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c
> > +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
> > @@ -16,6 +16,7 @@
> >
> > #include <drm/drmP.h>
> > #include <drm/drm_atomic.h>
> > +#include <drm/drm_atomic_uapi.h>
> > #include <drm/drm_fb_helper.h>
> > #include <drm/drm_fourcc.h>
> > #include <drm/drm_framebuffer.h>
> > diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c
> > index 621f17643bb0..a393756b664e 100644
> > --- a/drivers/gpu/drm/drm_plane_helper.c
> > +++ b/drivers/gpu/drm/drm_plane_helper.c
> > @@ -28,6 +28,7 @@
> > #include <drm/drm_plane_helper.h>
> > #include <drm/drm_rect.h>
> > #include <drm/drm_atomic.h>
> > +#include <drm/drm_atomic_uapi.h>
> > #include <drm/drm_crtc_helper.h>
> > #include <drm/drm_encoder.h>
> > #include <drm/drm_atomic_helper.h>
> > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > index a85a83f31979..85cad16f31ed 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -46,6 +46,7 @@
> > #include <drm/drm_crtc_helper.h>
> > #include <drm/drm_plane_helper.h>
> > #include <drm/drm_rect.h>
> > +#include <drm/drm_atomic_uapi.h>
> > #include <linux/dma_remapping.h>
> > #include <linux/reservation.h>
> >
> > diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
> > index c1f1779c980f..4bcdeca7479d 100644
> > --- a/drivers/gpu/drm/msm/msm_atomic.c
> > +++ b/drivers/gpu/drm/msm/msm_atomic.c
> > @@ -15,6 +15,8 @@
> > * this program. If not, see <http://www.gnu.org/licenses/>.
> > */
> >
> > +#include <drm/drm_atomic_uapi.h>
> > +
> > #include "msm_drv.h"
> > #include "msm_gem.h"
> > #include "msm_kms.h"
> > diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
> > index 0e6a121858d1..3ce136ba8791 100644
> > --- a/drivers/gpu/drm/vc4/vc4_crtc.c
> > +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
> > @@ -35,6 +35,7 @@
> > #include <drm/drm_atomic.h>
> > #include <drm/drm_atomic_helper.h>
> > #include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_atomic_uapi.h>
> > #include <linux/clk.h>
> > #include <drm/drm_fb_cma_helper.h>
> > #include <linux/component.h>
> > diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
> > index 6c6d37aa512a..9dc3fcbd290b 100644
> > --- a/drivers/gpu/drm/vc4/vc4_plane.c
> > +++ b/drivers/gpu/drm/vc4/vc4_plane.c
> > @@ -22,6 +22,7 @@
> > #include <drm/drm_atomic_helper.h>
> > #include <drm/drm_fb_cma_helper.h>
> > #include <drm/drm_plane_helper.h>
> > +#include <drm/drm_atomic_uapi.h>
> >
> > #include "uapi/drm/vc4_drm.h"
> > #include "vc4_drv.h"
> > diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
> > index 66e49ef7d3b5..4aff40886acb 100644
> > --- a/include/drm/drm_atomic.h
> > +++ b/include/drm/drm_atomic.h
> > @@ -584,22 +584,6 @@ __drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
> > return plane->state;
> > }
> >
> > -int __must_check
> > -drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
> > - const struct drm_display_mode *mode);
> > -int __must_check
> > -drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
> > - struct drm_property_blob *blob);
> > -int __must_check
> > -drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
> > - struct drm_crtc *crtc);
> > -void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
> > - struct drm_framebuffer *fb);
> > -void drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
> > - struct dma_fence *fence);
> > -int __must_check
> > -drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
> > - struct drm_crtc *crtc);
> > int __must_check
> > drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
> > struct drm_crtc *crtc);
> > diff --git a/include/drm/drm_atomic_uapi.h b/include/drm/drm_atomic_uapi.h
> > new file mode 100644
> > index 000000000000..8cec52ad1277
> > --- /dev/null
> > +++ b/include/drm/drm_atomic_uapi.h
> > @@ -0,0 +1,58 @@
> > +/*
> > + * Copyright (C) 2014 Red Hat
> > + * Copyright (C) 2014 Intel Corp.
> > + * Copyright (C) 2018 Intel Corp.
> > + *
> > + * Permission is hereby granted, free of charge, to any person obtaining a
> > + * copy of this software and associated documentation files (the "Software"),
> > + * to deal in the Software without restriction, including without limitation
> > + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> > + * and/or sell copies of the Software, and to permit persons to whom the
> > + * Software is furnished to do so, subject to the following conditions:
> > + *
> > + * The above copyright notice and this permission notice shall be included in
> > + * all copies or substantial portions of the Software.
> > + *
> > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> > + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> > + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> > + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> > + * OTHER DEALINGS IN THE SOFTWARE.
> > + *
> > + * Authors:
> > + * Rob Clark <robdclark at gmail.com>
> > + * Daniel Vetter <daniel.vetter at ffwll.ch>
> > + */
> > +
> > +#ifndef DRM_ATOMIC_UAPI_H_
> > +#define DRM_ATOMIC_UAPI_H_
> > +
> > +struct drm_crtc_state;
> > +struct drm_display_mode;
> > +struct drm_property_blob;
> > +struct drm_plane_state;
> > +struct drm_crtc;
> > +struct drm_connector_state;
> > +struct dma_fence;
> > +struct drm_framebuffer;
> > +
> > +int __must_check
> > +drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
> > + const struct drm_display_mode *mode);
> > +int __must_check
> > +drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
> > + struct drm_property_blob *blob);
> > +int __must_check
> > +drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
> > + struct drm_crtc *crtc);
> > +void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
> > + struct drm_framebuffer *fb);
> > +void drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
> > + struct dma_fence *fence);
> > +int __must_check
> > +drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
> > + struct drm_crtc *crtc);
> > +
> > +#endif
> > --
> > 2.18.0
> >
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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