static void modeset_cleanup(int fd)
{
	struct modeset_dev *iter;

	while (modeset_list) {
		/* remove from global list */
		iter = modeset_list;
		modeset_list = iter->next;

		/* restore saved CRTC configuration */
		drmModeSetCrtc(fd,
			       iter->saved_crtc->crtc_id,
			       iter->saved_crtc->buffer_id,
			       iter->saved_crtc->x,
			       iter->saved_crtc->y,
			       &iter->conn,
			       1,
			       &iter->saved_crtc->mode);
		drmModeFreeCrtc(iter->saved_crtc);

		/* destroy framebuffers */
		modeset_destroy_fb(fd, &iter->bufs[1]);
		modeset_destroy_fb(fd, &iter->bufs[0]);

		/* free allocated memory */
		free(iter);
	}
}
static int modeset_setup_dev(int fd, drmModeRes *res, drmModeConnector *conn,
			     struct modeset_dev *dev)
{
	int ret;

	/* check if a monitor is connected */
	if (conn->connection != DRM_MODE_CONNECTED) {
		fprintf(stderr, "ignoring unused connector %u\n",
			conn->connector_id);
		return -ENOENT;
	}

	/* check if there is at least one valid mode */
	if (conn->count_modes == 0) {
		fprintf(stderr, "no valid mode for connector %u\n",
			conn->connector_id);
		return -EFAULT;
	}

	/* copy the mode information into our device structure and into both
	 * buffers */
	memcpy(&dev->mode, &conn->modes[0], sizeof(dev->mode));
	dev->bufs[0].width = conn->modes[0].hdisplay;
	dev->bufs[0].height = conn->modes[0].vdisplay;
	dev->bufs[1].width = conn->modes[0].hdisplay;
	dev->bufs[1].height = conn->modes[0].vdisplay;
	fprintf(stderr, "mode for connector %u is %ux%u\n",
		conn->connector_id, dev->bufs[0].width, dev->bufs[0].height);

	/* find a crtc for this connector */
	ret = modeset_find_crtc(fd, res, conn, dev);
	if (ret) {
		fprintf(stderr, "no valid crtc for connector %u\n",
			conn->connector_id);
		return ret;
	}

	/* create framebuffer #1 for this CRTC */
	ret = modeset_create_fb(fd, &dev->bufs[0]);
	if (ret) {
		fprintf(stderr, "cannot create framebuffer for connector %u\n",
			conn->connector_id);
		return ret;
	}

	/* create framebuffer #2 for this CRTC */
	ret = modeset_create_fb(fd, &dev->bufs[1]);
	if (ret) {
		fprintf(stderr, "cannot create framebuffer for connector %u\n",
			conn->connector_id);
		modeset_destroy_fb(fd, &dev->bufs[0]);
		return ret;
	}

	return 0;
}
Exemple #3
0
static void modeset_destroy_fb(int fd, struct modeset_buf *buf)
{
    if (buf->map) {
        munmap(buf->map, buf->size);
    }
    if (buf->fb) {
        drmModeRmFB(fd, buf->fb);
    }
    if (buf->handle) {
        struct drm_mode_destroy_dumb dreq = {
            .handle = buf->handle,
        };
        drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &dreq);
    }
}

static int modeset_create_fb(struct vo *vo, int fd, struct modeset_buf *buf)
{
    int ret = 0;

    buf->handle = 0;

    // create dumb buffer
    struct drm_mode_create_dumb creq = {
        .width = buf->width,
        .height = buf->height,
        .bpp = 32,
    };
    ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &creq);
    if (ret < 0) {
        MP_ERR(vo, "Cannot create dumb buffer: %s\n", mp_strerror(errno));
        ret = -errno;
        goto end;
    }
    buf->stride = creq.pitch;
    buf->size = creq.size;
    buf->handle = creq.handle;

    // create framebuffer object for the dumb-buffer
    ret = drmModeAddFB(fd, buf->width, buf->height, 24, 32, buf->stride,
                       buf->handle, &buf->fb);
    if (ret) {
        MP_ERR(vo, "Cannot create framebuffer: %s\n", mp_strerror(errno));
        ret = -errno;
        goto end;
    }

    // prepare buffer for memory mapping
    struct drm_mode_map_dumb mreq = {
        .handle = buf->handle,
    };
    ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &mreq);
    if (ret) {
        MP_ERR(vo, "Cannot map dumb buffer: %s\n", mp_strerror(errno));
        ret = -errno;
        goto end;
    }

    // perform actual memory mapping
    buf->map = mmap(0, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED,
                    fd, mreq.offset);
    if (buf->map == MAP_FAILED) {
        MP_ERR(vo, "Cannot map dumb buffer: %s\n", mp_strerror(errno));
        ret = -errno;
        goto end;
    }

    memset(buf->map, 0, buf->size);

end:
    if (ret == 0) {
        return 0;
    }

    modeset_destroy_fb(fd, buf);
    return ret;
}

static int modeset_find_crtc(struct vo *vo, int fd, drmModeRes *res,
                             drmModeConnector *conn, struct modeset_dev *dev)
{
    for (unsigned int i = 0; i < conn->count_encoders; ++i) {
        drmModeEncoder *enc = drmModeGetEncoder(fd, conn->encoders[i]);
        if (!enc) {
            MP_WARN(vo, "Cannot retrieve encoder %u:%u: %s\n",
                    i, conn->encoders[i], mp_strerror(errno));
            continue;
        }

        // iterate all global CRTCs
        for (unsigned int j = 0; j < res->count_crtcs; ++j) {
            // check whether this CRTC works with the encoder
            if (!(enc->possible_crtcs & (1 << j)))
                continue;

            dev->enc = enc;
            dev->crtc = enc->crtc_id;
            return 0;
        }

        drmModeFreeEncoder(enc);
    }

    MP_ERR(vo, "Connector %u has no suitable CRTC\n", conn->connector_id);
    return -ENOENT;
}

static bool is_connector_valid(struct vo *vo, int conn_id,
                               drmModeConnector *conn, bool silent)
{
    if (!conn) {
        if (!silent) {
            MP_ERR(vo, "Cannot get connector %d: %s\n", conn_id,
                   mp_strerror(errno));
        }
        return false;
    }

    if (conn->connection != DRM_MODE_CONNECTED) {
        if (!silent) {
            MP_ERR(vo, "Connector %d is disconnected\n", conn_id);
        }
        return false;
    }

    if (conn->count_modes == 0) {
        if (!silent) {
            MP_ERR(vo, "Connector %d has no valid modes\n", conn_id);
        }
        return false;
    }

    return true;
}

static int modeset_prepare_dev(struct vo *vo, int fd, int conn_id,
                               struct modeset_dev **out)
{
    struct modeset_dev *dev = NULL;
    drmModeConnector *conn = NULL;

    int ret = 0;
    *out = NULL;

    drmModeRes *res = drmModeGetResources(fd);
    if (!res) {
        MP_ERR(vo, "Cannot retrieve DRM resources: %s\n", mp_strerror(errno));
        ret = -errno;
        goto end;
    }

    if (conn_id == -1) {
        // get the first connected connector
        for (int i = 0; i < res->count_connectors; i++) {
            conn = drmModeGetConnector(fd, res->connectors[i]);
            if (is_connector_valid(vo, i, conn, true)) {
                conn_id = i;
                break;
            }
            if (conn) {
                drmModeFreeConnector(conn);
                conn = NULL;
            }
        }
        if (conn_id == -1) {
            MP_ERR(vo, "No connected connectors found\n");
            ret = -ENODEV;
            goto end;
        }
    }

    if (conn_id < 0 || conn_id >= res->count_connectors) {
        MP_ERR(vo, "Bad connector ID. Max valid connector ID = %u\n",
               res->count_connectors);
        ret = -ENODEV;
        goto end;
    }

    conn = drmModeGetConnector(fd, res->connectors[conn_id]);
    if (!is_connector_valid(vo, conn_id, conn, false)) {
        ret = -ENODEV;
        goto end;
    }

    dev = talloc_zero(vo->priv, struct modeset_dev);
    dev->conn = conn->connector_id;
    dev->front_buf = 0;
    dev->mode = conn->modes[0];
    dev->bufs[0].width = conn->modes[0].hdisplay;
    dev->bufs[0].height = conn->modes[0].vdisplay;
    dev->bufs[1].width = conn->modes[0].hdisplay;
    dev->bufs[1].height = conn->modes[0].vdisplay;

    MP_INFO(vo, "Connector using mode %ux%u\n",
            dev->bufs[0].width, dev->bufs[0].height);

    ret = modeset_find_crtc(vo, fd, res, conn, dev);
    if (ret) {
        MP_ERR(vo, "Connector %d has no valid CRTC\n", conn_id);
        goto end;
    }

    for (unsigned int i = 0; i < BUF_COUNT; i++) {
        ret = modeset_create_fb(vo, fd, &dev->bufs[i]);
        if (ret) {
            MP_ERR(vo, "Cannot create framebuffer for connector %d\n",
                   conn_id);
            for (unsigned int j = 0; j < i; j++) {
                modeset_destroy_fb(fd, &dev->bufs[j]);
            }
            goto end;
        }
    }

end:
    if (conn) {
        drmModeFreeConnector(conn);
        conn = NULL;
    }
    if (res) {
        drmModeFreeResources(res);
        res = NULL;
    }
    if (ret == 0) {
        *out = dev;
    } else {
        talloc_free(dev);
    }
    return ret;
}

static void modeset_page_flipped(int fd, unsigned int frame, unsigned int sec,
                                 unsigned int usec, void *data)
{
    struct priv *p = data;
    p->pflip_happening = false;
}



static int setup_vo_crtc(struct vo *vo)
{
    struct priv *p = vo->priv;
    if (p->active)
        return 0;
    p->old_crtc = drmModeGetCrtc(p->fd, p->dev->crtc);
    int ret = drmModeSetCrtc(p->fd, p->dev->crtc,
                          p->dev->bufs[p->dev->front_buf + BUF_COUNT - 1].fb,
                          0, 0, &p->dev->conn, 1, &p->dev->mode);
    p->active = true;
    return ret;
}

static void release_vo_crtc(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (!p->active)
        return;
    p->active = false;

    // wait for current page flip
    while (p->pflip_happening) {
        int ret = drmHandleEvent(p->fd, &p->ev);
        if (ret) {
            MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
            break;
        }
    }

    if (p->old_crtc) {
        drmModeSetCrtc(p->fd,
                       p->old_crtc->crtc_id,
                       p->old_crtc->buffer_id,
                       p->old_crtc->x,
                       p->old_crtc->y,
                       &p->dev->conn,
                       1,
                       &p->dev->mode);
        drmModeFreeCrtc(p->old_crtc);
        p->old_crtc = NULL;
    }
}

static void release_vt(void *data)
{
    struct vo *vo = data;
    release_vo_crtc(vo);
    if (USE_MASTER) {
        //this function enables support for switching to x, weston etc.
        //however, for whatever reason, it can be called only by root users.
        //until things change, this is commented.
        struct priv *p = vo->priv;
        if (drmDropMaster(p->fd)) {
            MP_WARN(vo, "Failed to drop DRM master: %s\n", mp_strerror(errno));
        }
    }
}

static void acquire_vt(void *data)
{
    struct vo *vo = data;
    if (USE_MASTER) {
        struct priv *p = vo->priv;
        if (drmSetMaster(p->fd)) {
            MP_WARN(vo, "Failed to acquire DRM master: %s\n", mp_strerror(errno));
        }
    }

    setup_vo_crtc(vo);
}



static int wait_events(struct vo *vo, int64_t until_time_us)
{
    struct priv *p = vo->priv;
    int64_t wait_us = until_time_us - mp_time_us();
    int timeout_ms = MPCLAMP((wait_us + 500) / 1000, 0, 10000);
    vt_switcher_poll(&p->vt_switcher, timeout_ms);
    return 0;
}

static void wakeup(struct vo *vo)
{
    struct priv *p = vo->priv;
    vt_switcher_interrupt_poll(&p->vt_switcher);
}

static int reconfig(struct vo *vo, struct mp_image_params *params, int flags)
{
    struct priv *p = vo->priv;

    vo->dwidth = p->device_w;
    vo->dheight = p->device_h;
    vo_get_src_dst_rects(vo, &p->src, &p->dst, &p->osd);

    int32_t w = p->dst.x1 - p->dst.x0;
    int32_t h = p->dst.y1 - p->dst.y0;

    // p->osd contains the parameters assuming OSD rendering in window
    // coordinates, but OSD can only be rendered in the intersection
    // between window and video rectangle (i.e. not into panscan borders).
    p->osd.w = w;
    p->osd.h = h;
    p->osd.mt = MPMIN(0, p->osd.mt);
    p->osd.mb = MPMIN(0, p->osd.mb);
    p->osd.mr = MPMIN(0, p->osd.mr);
    p->osd.ml = MPMIN(0, p->osd.ml);

    p->x = (p->device_w - w) >> 1;
    p->y = (p->device_h - h) >> 1;

    mp_sws_set_from_cmdline(p->sws, vo->opts->sws_opts);
    p->sws->src = *params;
    p->sws->dst = (struct mp_image_params) {
        .imgfmt = IMGFMT_BGR0,
        .w = w,
        .h = h,
        .d_w = w,
        .d_h = h,
    };

    talloc_free(p->cur_frame);
    p->cur_frame = mp_image_alloc(IMGFMT_BGR0, p->device_w, p->device_h);
    mp_image_params_guess_csp(&p->sws->dst);
    mp_image_set_params(p->cur_frame, &p->sws->dst);

    struct modeset_buf *buf = p->dev->bufs;
    memset(buf[0].map, 0, buf[0].size);
    memset(buf[1].map, 0, buf[1].size);

    if (mp_sws_reinit(p->sws) < 0)
        return -1;

    vo->want_redraw = true;
    return 0;
}

static void draw_image(struct vo *vo, mp_image_t *mpi)
{
    struct priv *p = vo->priv;

    if (p->active) {
        struct mp_image src = *mpi;
        struct mp_rect src_rc = p->src;
        src_rc.x0 = MP_ALIGN_DOWN(src_rc.x0, mpi->fmt.align_x);
        src_rc.y0 = MP_ALIGN_DOWN(src_rc.y0, mpi->fmt.align_y);
        mp_image_crop_rc(&src, src_rc);
        mp_sws_scale(p->sws, p->cur_frame, &src);
        osd_draw_on_image(vo->osd, p->osd, src.pts, 0, p->cur_frame);

        struct modeset_buf *front_buf = &p->dev->bufs[p->dev->front_buf];
        int32_t shift = (p->device_w * p->y + p->x) * 4;
        memcpy_pic(front_buf->map + shift,
                   p->cur_frame->planes[0],
                   (p->dst.x1 - p->dst.x0) * 4,
                   p->dst.y1 - p->dst.y0,
                   p->device_w * 4,
                   p->cur_frame->stride[0]);
    }

    if (mpi != p->last_input) {
        talloc_free(p->last_input);
        p->last_input = mpi;
    }
}

static void flip_page(struct vo *vo)
{
    struct priv *p = vo->priv;
    if (!p->active || p->pflip_happening)
        return;

    int ret = drmModePageFlip(p->fd, p->dev->crtc,
                              p->dev->bufs[p->dev->front_buf].fb,
                              DRM_MODE_PAGE_FLIP_EVENT, p);
    if (ret) {
        MP_WARN(vo, "Cannot flip page for connector\n");
    } else {
        p->dev->front_buf++;
        p->dev->front_buf %= BUF_COUNT;
        p->pflip_happening = true;
    }

    // poll page flip finish event
    const int timeout_ms = 3000;
    struct pollfd fds[1] = {
        { .events = POLLIN, .fd = p->fd },
    };
    poll(fds, 1, timeout_ms);
    if (fds[0].revents & POLLIN) {
        ret = drmHandleEvent(p->fd, &p->ev);
        if (ret != 0) {
            MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
            return;
        }
    }
}

static void uninit(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (p->dev) {
        release_vo_crtc(vo);

        modeset_destroy_fb(p->fd, &p->dev->bufs[1]);
        modeset_destroy_fb(p->fd, &p->dev->bufs[0]);
        drmModeFreeEncoder(p->dev->enc);
    }

    vt_switcher_destroy(&p->vt_switcher);
    talloc_free(p->last_input);
    talloc_free(p->cur_frame);
    talloc_free(p->dev);
    close(p->fd);
}

static int preinit(struct vo *vo)
{
    struct priv *p = vo->priv;
    p->sws = mp_sws_alloc(vo);
    p->fd = -1;
    p->ev.version = DRM_EVENT_CONTEXT_VERSION;
    p->ev.page_flip_handler = modeset_page_flipped;

    if (vt_switcher_init(&p->vt_switcher, vo->log))
        goto err;

    vt_switcher_acquire(&p->vt_switcher, acquire_vt, vo);
    vt_switcher_release(&p->vt_switcher, release_vt, vo);

    if (modeset_open(vo, &p->fd, p->device_path))
        goto err;

    if (modeset_prepare_dev(vo, p->fd, p->connector_id, &p->dev))
        goto err;

    assert(p->dev);
    p->device_w = p->dev->bufs[0].width;
    p->device_h = p->dev->bufs[0].height;

    if (setup_vo_crtc(vo)) {
        MP_ERR(vo, "Cannot set CRTC for connector %u: %s\n", p->connector_id,
               mp_strerror(errno));
        goto err;
    }

    return 0;

err:
    uninit(vo);
    return -1;
}

static int query_format(struct vo *vo, int format)
{
    return sws_isSupportedInput(imgfmt2pixfmt(format));
}

static int control(struct vo *vo, uint32_t request, void *data)
{
    struct priv *p = vo->priv;
    switch (request) {
    case VOCTRL_SCREENSHOT_WIN:
        *(struct mp_image**)data = mp_image_new_copy(p->cur_frame);
        return VO_TRUE;
    case VOCTRL_REDRAW_FRAME:
        draw_image(vo, p->last_input);
        return VO_TRUE;
    case VOCTRL_GET_PANSCAN:
        return VO_TRUE;
    case VOCTRL_SET_PANSCAN:
        if (vo->config_ok)
            reconfig(vo, vo->params, 0);
        return VO_TRUE;
    }
    return VO_NOTIMPL;
}

#define OPT_BASE_STRUCT struct priv

const struct vo_driver video_out_drm = {
    .name = "drm",
    .description = "Direct Rendering Manager",
    .preinit = preinit,
    .query_format = query_format,
    .reconfig = reconfig,
    .control = control,
    .draw_image = draw_image,
    .flip_page = flip_page,
    .uninit = uninit,
    .wait_events = wait_events,
    .wakeup = wakeup,
    .priv_size = sizeof(struct priv),
    .options = (const struct m_option[]) {
        OPT_STRING("devpath", device_path, 0),
        OPT_INT("connector", connector_id, 0),
        {0},
    },
    .priv_defaults = &(const struct priv) {