C++ drm_connector_helper_add函数代码示例

static struct drm_connector *cirrus_vga_init(struct drm_device *dev)
{
	struct drm_connector *connector;
	struct cirrus_connector *cirrus_connector;

	cirrus_connector = kzalloc(sizeof(struct cirrus_connector), GFP_KERNEL);
	if (!cirrus_connector)
		return NULL;

	connector = &cirrus_connector->base;

	drm_connector_init(dev, connector,
			   &cirrus_vga_connector_funcs, DRM_MODE_CONNECTOR_VGA);

	drm_connector_helper_add(connector, &cirrus_vga_connector_helper_funcs);

	return connector;
}

int hibmc_connector_init(struct hibmc_drm_device *hidev)
{
	struct drm_device *dev = hidev->dev;
	struct drm_connector *connector = &hidev->connector;
	int ret;

	ret = drm_connector_init(dev, connector,
				 &hibmc_connector_connector_funcs,
				 DRM_MODE_CONNECTOR_VIRTUAL);
	if (ret) {
		DRM_ERROR("failed to init connector\n");
		return ret;
	}
	drm_connector_helper_add(connector,
				 &hibmc_connector_connector_helper_funcs);

	return 0;
}

/* initialize connector */
struct drm_connector *msm_edp_connector_init(struct msm_edp *edp)
{
	struct drm_connector *connector = NULL;
	struct edp_connector *edp_connector;
	int ret;

	edp_connector = kzalloc(sizeof(*edp_connector), GFP_KERNEL);
	if (!edp_connector) {
		ret = -ENOMEM;
		goto fail;
	}

	edp_connector->edp = edp;

	connector = &edp_connector->base;

	ret = drm_connector_init(edp->dev, connector, &edp_connector_funcs,
			DRM_MODE_CONNECTOR_eDP);
	if (ret)
		goto fail;

	drm_connector_helper_add(connector, &edp_connector_helper_funcs);

	/* We don't support HPD, so only poll status until connected. */
	connector->polled = DRM_CONNECTOR_POLL_CONNECT;

	/* Display driver doesn't support interlace now. */
	connector->interlace_allowed = false;
	connector->doublescan_allowed = false;

	ret = drm_connector_register(connector);
	if (ret)
		goto fail;

	drm_mode_connector_attach_encoder(connector, edp->encoder);

	return connector;

fail:
	if (connector)
		edp_connector_destroy(connector);

	return ERR_PTR(ret);
}

/* initialize connector */
struct drm_connector *omap_connector_init(struct drm_device *dev,
		int connector_type, struct omap_dss_device *dssdev,
		struct drm_encoder *encoder)
{
	struct drm_connector *connector = NULL;
	struct omap_connector *omap_connector;

	DBG("%s", dssdev->name);

	omap_dss_get_device(dssdev);

	omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
	if (!omap_connector)
		goto fail;

	omap_connector->dssdev = dssdev;

	connector = &omap_connector->base;

	drm_connector_init(dev, connector, &omap_connector_funcs,
				connector_type);
	drm_connector_helper_add(connector, &omap_connector_helper_funcs);

#if 0 /* enable when dss2 supports hotplug */
	if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
		connector->polled = 0;
	else
#endif
		connector->polled = DRM_CONNECTOR_POLL_CONNECT |
				DRM_CONNECTOR_POLL_DISCONNECT;

	connector->interlace_allowed = 1;
	connector->doublescan_allowed = 0;

	drm_connector_register(connector);

	return connector;

fail:
	if (connector)
		omap_connector_destroy(connector);

	return NULL;
}

/* initialize connector */
struct drm_connector *hdmi_connector_init(struct hdmi *hdmi)
{
	struct drm_connector *connector = NULL;
	struct hdmi_connector *hdmi_connector;
	int ret;

	hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
	if (!hdmi_connector) {
		ret = -ENOMEM;
		goto fail;
	}

	hdmi_connector->hdmi = hdmi_reference(hdmi);
	INIT_WORK(&hdmi_connector->hpd_work, hotplug_work);

	connector = &hdmi_connector->base;

	drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
			DRM_MODE_CONNECTOR_HDMIA);
	drm_connector_helper_add(connector, &hdmi_connector_helper_funcs);

	connector->polled = DRM_CONNECTOR_POLL_HPD;

	connector->interlace_allowed = 1;
	connector->doublescan_allowed = 0;

	drm_sysfs_connector_add(connector);

	ret = hpd_enable(hdmi_connector);
	if (ret) {
		dev_err(hdmi->dev->dev, "failed to enable HPD: %d\n", ret);
		goto fail;
	}

	drm_mode_connector_attach_encoder(connector, hdmi->encoder);

	return connector;

fail:
	if (connector)
		hdmi_connector_destroy(connector);

	return ERR_PTR(ret);
}

int shmob_drm_connector_create(struct shmob_drm_device *sdev,
			       struct drm_encoder *encoder)
{
	struct drm_connector *connector = &sdev->connector.connector;
	int ret;

	sdev->connector.encoder = encoder;

	connector->display_info.width_mm = sdev->pdata->panel.width_mm;
	connector->display_info.height_mm = sdev->pdata->panel.height_mm;

	ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
				 DRM_MODE_CONNECTOR_LVDS);
	if (ret < 0)
		return ret;

	drm_connector_helper_add(connector, &connector_helper_funcs);
	ret = drm_connector_register(connector);
	if (ret < 0)
		goto err_cleanup;

	ret = shmob_drm_backlight_init(&sdev->connector);
	if (ret < 0)
		goto err_sysfs;

	ret = drm_mode_connector_attach_encoder(connector, encoder);
	if (ret < 0)
		goto err_backlight;

	drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
	drm_object_property_set_value(&connector->base,
		sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);

	return 0;

err_backlight:
	shmob_drm_backlight_exit(&sdev->connector);
err_sysfs:
	drm_connector_unregister(connector);
err_cleanup:
	drm_connector_cleanup(connector);
	return ret;
}

static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
				 struct drm_panel *panel)
{
	struct drm_encoder *encoder = &fsl_dev->encoder;
	struct drm_connector *connector = &fsl_dev->connector.base;
	struct drm_mode_config *mode_config = &fsl_dev->drm->mode_config;
	int ret;

	fsl_dev->connector.encoder = encoder;

	ret = drm_connector_init(fsl_dev->drm, connector,
				 &fsl_dcu_drm_connector_funcs,
				 DRM_MODE_CONNECTOR_LVDS);
	if (ret < 0)
		return ret;

	drm_connector_helper_add(connector, &connector_helper_funcs);
	ret = drm_connector_register(connector);
	if (ret < 0)
		goto err_cleanup;

	ret = drm_mode_connector_attach_encoder(connector, encoder);
	if (ret < 0)
		goto err_sysfs;

	drm_object_property_set_value(&connector->base,
				      mode_config->dpms_property,
				      DRM_MODE_DPMS_OFF);

	ret = drm_panel_attach(panel, connector);
	if (ret) {
		dev_err(fsl_dev->dev, "failed to attach panel\n");
		goto err_sysfs;
	}

	return 0;

err_sysfs:
	drm_connector_unregister(connector);
err_cleanup:
	drm_connector_cleanup(connector);
	return ret;
}

/* initialize connector */
struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev,
		struct drm_panel *panel, struct drm_encoder *encoder)
{
	struct drm_connector *connector = NULL;
	struct mdp4_lvds_connector *mdp4_lvds_connector;
	int ret;

	mdp4_lvds_connector = kzalloc(sizeof(*mdp4_lvds_connector), GFP_KERNEL);
	if (!mdp4_lvds_connector) {
		ret = -ENOMEM;
		goto fail;
	}

	mdp4_lvds_connector->encoder = encoder;
	mdp4_lvds_connector->panel = panel;

	connector = &mdp4_lvds_connector->base;

	drm_connector_init(dev, connector, &mdp4_lvds_connector_funcs,
			DRM_MODE_CONNECTOR_LVDS);
	drm_connector_helper_add(connector, &mdp4_lvds_connector_helper_funcs);

	connector->polled = 0;

	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;

	drm_connector_register(connector);

	drm_mode_connector_attach_encoder(connector, encoder);

	if (panel)
		drm_panel_attach(panel, connector);

	return connector;

fail:
	if (connector)
		mdp4_lvds_connector_destroy(connector);

	return ERR_PTR(ret);
}

static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
{
	struct drm_device *dev = vgdev->ddev;
	struct virtio_gpu_output *output = vgdev->outputs + index;
	struct drm_connector *connector = &output->conn;
	struct drm_encoder *encoder = &output->enc;
	struct drm_crtc *crtc = &output->crtc;
	struct drm_plane *primary, *cursor;

	output->index = index;
	if (index == 0) {
		output->info.enabled = cpu_to_le32(true);
		output->info.r.width = cpu_to_le32(XRES_DEF);
		output->info.r.height = cpu_to_le32(YRES_DEF);
	}

	primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);
	if (IS_ERR(primary))
		return PTR_ERR(primary);
	cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
	if (IS_ERR(cursor))
		return PTR_ERR(cursor);
	drm_crtc_init_with_planes(dev, crtc, primary, cursor,
				  &virtio_gpu_crtc_funcs, NULL);
	drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);

	drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
			   DRM_MODE_CONNECTOR_VIRTUAL);
	drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);
	if (vgdev->has_edid)
		drm_connector_attach_edid_property(connector);

	drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
			 DRM_MODE_ENCODER_VIRTUAL, NULL);
	drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
	encoder->possible_crtcs = 1 << index;

	drm_connector_attach_encoder(connector, encoder);
	drm_connector_register(connector);
	return 0;
}

int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,
				struct rcar_du_encoder *renc)
{
	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
	struct rcar_du_connector *rcon;
	struct drm_connector *connector;
	int ret;

	rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
	if (rcon == NULL)
		return -ENOMEM;

	connector = &rcon->connector;
	connector->display_info.width_mm = 0;
	connector->display_info.height_mm = 0;
	connector->interlace_allowed = true;
	connector->polled = DRM_CONNECTOR_POLL_HPD;

	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
				 DRM_MODE_CONNECTOR_HDMIA);
	if (ret < 0)
		return ret;

	drm_connector_helper_add(connector, &connector_helper_funcs);
	ret = drm_connector_register(connector);
	if (ret < 0)
		return ret;

	connector->dpms = DRM_MODE_DPMS_OFF;
	drm_object_property_set_value(&connector->base,
		rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);

	ret = drm_mode_connector_attach_encoder(connector, encoder);
	if (ret < 0)
		return ret;

	rcon->encoder = renc;

	return 0;
}

int mxsfb_create_output(struct drm_device *drm)
{
	struct mxsfb_drm_private *mxsfb = drm->dev_private;
	struct drm_panel *panel;
	int ret;

	ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel, NULL);
	if (ret)
		return ret;

	mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
	mxsfb->connector.polled = 0;
	drm_connector_helper_add(&mxsfb->connector,
			&mxsfb_panel_connector_helper_funcs);
	ret = drm_connector_init(drm, &mxsfb->connector,
				 &mxsfb_panel_connector_funcs,
				 DRM_MODE_CONNECTOR_Unknown);
	if (!ret)
		mxsfb->panel = panel;

	return ret;
}

struct drm_connector *meson_cvbs_connector_create(struct drm_device *dev,
						  bool enabled,
						  struct drm_display_mode *mode)
{
	struct meson_connector *meson_connector;
	struct drm_connector *connector;
        struct drm_encoder *encoder;
	int ret;

	encoder = meson_encoder_create(dev);
	if (!encoder)
		return NULL;

	meson_connector = kzalloc(sizeof(*meson_connector), GFP_KERNEL);
	if (!meson_connector)
		return NULL;

	connector = &meson_connector->base;
	meson_connector->encoder = encoder;
	meson_connector->enabled = enabled;
	meson_connector->mode = mode;

	drm_connector_init(dev, connector, &meson_connector_funcs, DRM_MODE_CONNECTOR_Composite);
	drm_connector_helper_add(connector, &meson_connector_helper_funcs);

	connector->interlace_allowed = 1;
	connector->doublescan_allowed = 0;

	ret = drm_mode_connector_attach_encoder(connector, encoder);
	if (ret)
		goto fail;

	drm_connector_register(connector);
	return connector;

fail:
	meson_connector_destroy(connector);
	return NULL;
}

static int imx_ldb_register(struct drm_device *drm,
	struct imx_ldb_channel *imx_ldb_ch)
{
	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	int ret;

	ret = imx_drm_encoder_parse_of(drm, &imx_ldb_ch->encoder,
				       imx_ldb_ch->child);
	if (ret)
		return ret;

	ret = imx_ldb_get_clk(ldb, imx_ldb_ch->chno);
	if (ret)
		return ret;

	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
		ret = imx_ldb_get_clk(ldb, 1);
		if (ret)
			return ret;
	}

	drm_encoder_helper_add(&imx_ldb_ch->encoder,
			&imx_ldb_encoder_helper_funcs);
	drm_encoder_init(drm, &imx_ldb_ch->encoder, &imx_ldb_encoder_funcs,
			 DRM_MODE_ENCODER_LVDS);

	drm_connector_helper_add(&imx_ldb_ch->connector,
			&imx_ldb_connector_helper_funcs);
	drm_connector_init(drm, &imx_ldb_ch->connector,
			   &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);

	if (imx_ldb_ch->panel)
		drm_panel_attach(imx_ldb_ch->panel, &imx_ldb_ch->connector);

	drm_mode_connector_attach_encoder(&imx_ldb_ch->connector,
			&imx_ldb_ch->encoder);

	return 0;
}

static int dw_mipi_dsi_register(struct drm_device *drm,
				      struct dw_mipi_dsi *dsi)
{
	struct drm_encoder *encoder = &dsi->encoder;
	struct drm_connector *connector = &dsi->connector;
	struct device *dev = dsi->dev;
	int ret;

	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm,
							     dev->of_node);
	/*
	 * If we failed to find the CRTC(s) which this encoder is
	 * supposed to be connected to, it's because the CRTC has
	 * not been registered yet.  Defer probing, and hope that
	 * the required CRTC is added later.
	 */
	if (encoder->possible_crtcs == 0)
		return -EPROBE_DEFER;

	drm_encoder_helper_add(&dsi->encoder,
			       &dw_mipi_dsi_encoder_helper_funcs);
	ret = drm_encoder_init(drm, &dsi->encoder, &dw_mipi_dsi_encoder_funcs,
			 DRM_MODE_ENCODER_DSI, NULL);
	if (ret) {
		dev_err(dev, "Failed to initialize encoder with drm\n");
		return ret;
	}

	drm_connector_helper_add(connector,
			&dw_mipi_dsi_connector_helper_funcs);

	drm_connector_init(drm, &dsi->connector,
			   &dw_mipi_dsi_atomic_connector_funcs,
			   DRM_MODE_CONNECTOR_DSI);

	drm_mode_connector_attach_encoder(connector, encoder);

	return 0;
}

int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
			       struct rcar_du_encoder *renc)
{
	struct rcar_du_connector *rcon;
	struct drm_connector *connector;
	int ret;

	rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
	if (rcon == NULL)
		return -ENOMEM;

	connector = &rcon->connector;
	connector->display_info.width_mm = 0;
	connector->display_info.height_mm = 0;

	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
				 DRM_MODE_CONNECTOR_VGA);
	if (ret < 0)
		return ret;

	drm_connector_helper_add(connector, &connector_helper_funcs);
	ret = drm_connector_register(connector);
	if (ret < 0)
		return ret;

	drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
	drm_object_property_set_value(&connector->base,
		rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);

	ret = drm_mode_connector_attach_encoder(connector, &renc->encoder);
	if (ret < 0)
		return ret;

	connector->encoder = &renc->encoder;
	rcon->encoder = renc;

	return 0;
}