1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Texas Instruments 4 * Author: Jyri Sarha <jsarha@ti.com> 5 */ 6 7 #include <linux/of_graph.h> 8 9 #include <drm/drm_atomic_helper.h> 10 #include <drm/drm_bridge.h> 11 #include <drm/drm_bridge_connector.h> 12 #include <drm/drm_of.h> 13 #include <drm/drm_simple_kms_helper.h> 14 15 #include "tilcdc_drv.h" 16 #include "tilcdc_encoder.h" 17 18 static 19 int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge) 20 { 21 struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(ddev); 22 struct drm_connector *connector; 23 int ret; 24 25 priv->encoder->base.possible_crtcs = BIT(0); 26 27 ret = drm_bridge_attach(&priv->encoder->base, bridge, NULL, 28 DRM_BRIDGE_ATTACH_NO_CONNECTOR); 29 if (ret) 30 return ret; 31 32 connector = drm_bridge_connector_init(ddev, &priv->encoder->base); 33 if (IS_ERR(connector)) { 34 drm_err(ddev, "bridge_connector create failed\n"); 35 return PTR_ERR(connector); 36 } 37 38 priv->connector = connector; 39 return 0; 40 } 41 42 int tilcdc_encoder_create(struct drm_device *ddev) 43 { 44 struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(ddev); 45 struct tilcdc_encoder *encoder; 46 struct drm_bridge *bridge; 47 48 bridge = devm_drm_of_get_bridge(ddev->dev, ddev->dev->of_node, 0, 0); 49 if (PTR_ERR(bridge) == -ENODEV) 50 return 0; 51 else if (IS_ERR(bridge)) 52 return PTR_ERR(bridge); 53 54 encoder = drmm_simple_encoder_alloc(ddev, struct tilcdc_encoder, 55 base, DRM_MODE_ENCODER_NONE); 56 if (IS_ERR(encoder)) { 57 drm_err(ddev, "drm_encoder_init() failed %pe\n", encoder); 58 return PTR_ERR(encoder); 59 } 60 priv->encoder = encoder; 61 62 return tilcdc_attach_bridge(ddev, bridge); 63 } 64