// SPDX-License-Identifier: GPL-2.0+ /* * RZ/G2L Display Unit Encoder * * Copyright (C) 2023 Renesas Electronics Corporation * * Based on rcar_du_encoder.c */ #include <linux/export.h> #include <linux/of.h> #include <drm/drm_bridge.h> #include <drm/drm_bridge_connector.h> #include <drm/drm_panel.h> #include "rzg2l_du_drv.h" #include "rzg2l_du_encoder.h" /* ----------------------------------------------------------------------------- * Encoder */ static const struct drm_encoder_funcs rzg2l_du_encoder_funcs = { }; int rzg2l_du_encoder_init(struct rzg2l_du_device *rcdu, enum rzg2l_du_output output, struct device_node *enc_node) { struct rzg2l_du_encoder *renc; struct drm_connector *connector; struct drm_bridge *bridge; int ret; /* Locate the DRM bridge from the DT node. */ bridge = of_drm_find_bridge(enc_node); if (!bridge) return -EPROBE_DEFER; dev_dbg(rcdu->dev, "initializing encoder %pOF for output %s\n", enc_node, rzg2l_du_output_name(output)); renc = drmm_encoder_alloc(&rcdu->ddev, struct rzg2l_du_encoder, base, &rzg2l_du_encoder_funcs, DRM_MODE_ENCODER_NONE, NULL); if (IS_ERR(renc)) return PTR_ERR(renc); renc->output = output; /* Attach the bridge to the encoder. */ ret = drm_bridge_attach(&renc->base, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (ret) { dev_err(rcdu->dev, "failed to attach bridge %pOF for output %s (%d)\n", bridge->of_node, rzg2l_du_output_name(output), ret); return ret; } /* Create the connector for the chain of bridges. */ connector = drm_bridge_connector_init(&rcdu->ddev, &renc->base); if (IS_ERR(connector)) { dev_err(rcdu->dev, "failed to created connector for output %s (%ld)\n", rzg2l_du_output_name(output), PTR_ERR(connector)); return PTR_ERR(connector); } return drm_connector_attach_encoder(connector, &renc->base); }