weston/libweston/backend-drm/drm-virtual.c

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/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
* Copyright © 2017, 2018 Collabora, Ltd.
* Copyright © 2017, 2018 General Electric Company
* Copyright (c) 2018 DisplayLink (UK) Ltd.
*
* 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 (including the
* next paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS
* 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.
*/
#include "config.h"
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "drm-internal.h"
#include "renderer-gl/gl-renderer.h"
#define POISON_PTR ((void *)8)
/**
* Create a drm_crtc for virtual output
*
* It will leave its ID and pipe zeroed, as virtual outputs should not use real
* CRTC's. Also, as this is a fake CRTC, it will not try to populate props.
*/
static struct drm_crtc *
drm_virtual_crtc_create(struct drm_device *device, struct drm_output *output)
{
struct drm_crtc *crtc;
crtc = zalloc(sizeof(*crtc));
if (!crtc)
return NULL;
crtc->device = device;
crtc->output = output;
crtc->crtc_id = 0;
crtc->pipe = 0;
/* Poisoning the pointers as CRTC's of virtual outputs should not be
* added to the DRM-backend CRTC list. With this we can assure (in
* function drm_virtual_crtc_destroy()) that this did not happen. */
crtc->link.prev = POISON_PTR;
crtc->link.next = POISON_PTR;
return crtc;
}
/**
* Destroy drm_crtc created by drm_virtual_crtc_create()
*/
static void
drm_virtual_crtc_destroy(struct drm_crtc *crtc)
{
assert(crtc->link.prev == POISON_PTR);
assert(crtc->link.next == POISON_PTR);
free(crtc);
}
/**
* Create a drm_plane for virtual output
*
* Call drm_virtual_plane_destroy to clean up the plane.
*
* @param device DRM device
* @param output Output to create internal plane for
*/
static struct drm_plane *
drm_virtual_plane_create(struct drm_device *device, struct drm_output *output)
{
struct drm_backend *b = device->backend;
struct drm_plane *plane;
struct weston_drm_format *fmt;
uint64_t mod;
plane = zalloc(sizeof(*plane));
if (!plane) {
weston_log("%s: out of memory\n", __func__);
return NULL;
}
plane->type = WDRM_PLANE_TYPE_PRIMARY;
plane->device = device;
plane->state_cur = drm_plane_state_alloc(NULL, plane);
plane->state_cur->complete = true;
weston_drm_format_array_init(&plane->formats);
fmt = weston_drm_format_array_add_format(&plane->formats, output->gbm_format);
if (!fmt)
goto err;
/* If output supports linear modifier, we add it to the plane.
* Otherwise we add DRM_FORMAT_MOD_INVALID, as explicit modifiers
* are not supported. */
if ((output->gbm_bo_flags & GBM_BO_USE_LINEAR) && device->fb_modifiers)
mod = DRM_FORMAT_MOD_LINEAR;
else
mod = DRM_FORMAT_MOD_INVALID;
if (weston_drm_format_add_modifier(fmt, mod) < 0)
goto err;
weston_plane_init(&plane->base, b->compositor, 0, 0);
wl_list_insert(&device->plane_list, &plane->link);
return plane;
err:
drm_plane_state_free(plane->state_cur, true);
weston_drm_format_array_fini(&plane->formats);
free(plane);
return NULL;
}
/**
* Destroy one DRM plane
*
* @param plane Plane to deallocate (will be freed)
*/
static void
drm_virtual_plane_destroy(struct drm_plane *plane)
{
drm_plane_state_free(plane->state_cur, true);
weston_plane_release(&plane->base);
wl_list_remove(&plane->link);
weston_drm_format_array_fini(&plane->formats);
free(plane);
}
static int
drm_virtual_output_start_repaint_loop(struct weston_output *output_base)
{
weston_output_finish_frame(output_base, NULL,
WP_PRESENTATION_FEEDBACK_INVALID);
return 0;
}
static int
drm_virtual_output_submit_frame(struct drm_output *output,
struct drm_fb *fb)
{
int fd, ret;
assert(fb->num_planes == 1);
ret = drmPrimeHandleToFD(fb->fd, fb->handles[0], DRM_CLOEXEC, &fd);
if (ret) {
weston_log("drmPrimeHandleFD failed, errno=%d\n", errno);
return -1;
}
drm_fb_ref(fb);
ret = output->virtual_submit_frame(&output->base, fd, fb->strides[0],
fb);
if (ret < 0) {
drm_fb_unref(fb);
close(fd);
}
return ret;
}
static int
drm_virtual_output_repaint(struct weston_output *output_base,
pixman_region32_t *damage)
{
struct drm_output_state *state = NULL;
struct drm_output *output = to_drm_output(output_base);
struct drm_plane *scanout_plane = output->scanout_plane;
struct drm_plane_state *scanout_state;
struct drm_pending_state *pending_state;
struct drm_device *device;
assert(output->virtual);
device = output->device;
pending_state = device->repaint_data;
if (output->disable_pending || output->destroy_pending)
goto err;
/* Drop frame if there isn't free buffers */
if (!gbm_surface_has_free_buffers(output->gbm_surface)) {
weston_log("%s: Drop frame!!\n", __func__);
return -1;
}
assert(!output->state_last);
/* If planes have been disabled in the core, we might not have
* hit assign_planes at all, so might not have valid output state
* here. */
state = drm_pending_state_get_output(pending_state, output);
if (!state)
state = drm_output_state_duplicate(output->state_cur,
pending_state,
DRM_OUTPUT_STATE_CLEAR_PLANES);
drm_output_render(state, damage);
scanout_state = drm_output_state_get_plane(state, scanout_plane);
if (!scanout_state || !scanout_state->fb)
goto err;
if (drm_virtual_output_submit_frame(output, scanout_state->fb) < 0)
goto err;
return 0;
err:
drm_output_state_free(state);
return -1;
}
static void
drm_virtual_output_deinit(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
drm_output_fini_egl(output);
drm_virtual_plane_destroy(output->scanout_plane);
drm_virtual_crtc_destroy(output->crtc);
}
void
drm_virtual_output_destroy(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
assert(output->virtual);
if (output->base.enabled)
drm_virtual_output_deinit(&output->base);
weston_output_release(&output->base);
drm_output_state_free(output->state_cur);
if (output->virtual_destroy)
output->virtual_destroy(base);
free(output);
}
static int
drm_virtual_output_enable(struct weston_output *output_base)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_device *device = output->device;
struct drm_backend *b = device->backend;
assert(output->virtual);
if (b->use_pixman) {
weston_log("Not support pixman renderer on Virtual output\n");
goto err;
}
if (!output->virtual_submit_frame) {
weston_log("The virtual_submit_frame hook is not set\n");
goto err;
}
output->scanout_plane = drm_virtual_plane_create(device, output);
if (!output->scanout_plane) {
weston_log("Failed to find primary plane for output %s\n",
output->base.name);
return -1;
}
if (drm_output_init_egl(output, b) < 0) {
weston_log("Failed to init output gl state\n");
goto err;
}
output->base.start_repaint_loop = drm_virtual_output_start_repaint_loop;
output->base.repaint = drm_virtual_output_repaint;
output->base.assign_planes = drm_assign_planes;
output->base.set_dpms = NULL;
output->base.switch_mode = NULL;
output->base.gamma_size = 0;
output->base.set_gamma = NULL;
weston_compositor_stack_plane(b->compositor,
&output->scanout_plane->base,
&b->compositor->primary_plane);
return 0;
err:
return -1;
}
static int
drm_virtual_output_disable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
assert(output->virtual);
if (output->base.enabled)
drm_virtual_output_deinit(&output->base);
return 0;
}
static struct weston_output *
drm_virtual_output_create(struct weston_compositor *c, char *name,
void (*destroy_func)(struct weston_output *))
{
struct drm_output *output;
struct drm_backend *b = to_drm_backend(c);
/* Always use the main device for virtual outputs */
struct drm_device *device = b->drm;
output = zalloc(sizeof *output);
if (!output)
return NULL;
output->device = device;
output->crtc = drm_virtual_crtc_create(device, output);
if (!output->crtc) {
free(output);
return NULL;
}
output->virtual = true;
output->virtual_destroy = destroy_func;
output->gbm_bo_flags = GBM_BO_USE_LINEAR | GBM_BO_USE_RENDERING;
weston_output_init(&output->base, c, name);
output->base.enable = drm_virtual_output_enable;
output->base.destroy = drm_virtual_output_destroy;
output->base.disable = drm_virtual_output_disable;
output->base.attach_head = NULL;
output->state_cur = drm_output_state_alloc(output, NULL);
weston_compositor_add_pending_output(&output->base, c);
return &output->base;
}
static uint32_t
drm_virtual_output_set_gbm_format(struct weston_output *base,
const char *gbm_format)
{
struct drm_output *output = to_drm_output(base);
struct drm_device *device = output->device;
struct drm_backend *b = device->backend;
if (parse_gbm_format(gbm_format, b->gbm_format, &output->gbm_format) == -1)
output->gbm_format = b->gbm_format;
return output->gbm_format;
}
static void
drm_virtual_output_set_submit_frame_cb(struct weston_output *output_base,
submit_frame_cb cb)
{
struct drm_output *output = to_drm_output(output_base);
output->virtual_submit_frame = cb;
}
static int
drm_virtual_output_get_fence_fd(struct weston_output *output_base)
{
return gl_renderer->create_fence_fd(output_base);
}
static void
drm_virtual_output_buffer_released(struct drm_fb *fb)
{
drm_fb_unref(fb);
}
static void
drm_virtual_output_finish_frame(struct weston_output *output_base,
struct timespec *stamp,
uint32_t presented_flags)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_plane_state *ps;
wl_list_for_each(ps, &output->state_cur->plane_list, link)
ps->complete = true;
drm_output_state_free(output->state_last);
output->state_last = NULL;
weston_output_finish_frame(&output->base, stamp, presented_flags);
/* We can't call this from frame_notify, because the output's
* repaint needed flag is cleared just after that */
if (output->recorder)
weston_output_schedule_repaint(&output->base);
}
static const struct weston_drm_virtual_output_api virt_api = {
drm_virtual_output_create,
drm_virtual_output_set_gbm_format,
drm_virtual_output_set_submit_frame_cb,
drm_virtual_output_get_fence_fd,
drm_virtual_output_buffer_released,
drm_virtual_output_finish_frame
};
int drm_backend_init_virtual_output_api(struct weston_compositor *compositor)
{
return weston_plugin_api_register(compositor,
WESTON_DRM_VIRTUAL_OUTPUT_API_NAME,
&virt_api, sizeof(virt_api));
}