renesas/rcar-du/rcar_du_encoder.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * R-Car Display Unit Encoder
5  * Copyright (C) 2013-2014 Renesas Electronics Corporation
21 /* -----------------------------------------------------------------------------
22  * Encoder
70 		bridge = devm_drm_panel_bridge_add_typed(rcdu->dev, panel,  in rcar_du_encoder_init()
77 			return -EPROBE_DEFER;  in rcar_du_encoder_init()
81 			rcdu->lvds[output - RCAR_DU_OUTPUT_LVDS0] = bridge;  in rcar_du_encoder_init()
85 			rcdu->dsi[output - RCAR_DU_OUTPUT_DSI0] = bridge;  in rcar_du_encoder_init()
89 	 * Create and initialize the encoder. On Gen3, skip the LVDS1 output if  in rcar_du_encoder_init()
90 	 * the LVDS1 encoder is used as a companion for LVDS0 in dual-link  in rcar_du_encoder_init()
91 	 * mode, or any LVDS output if it isn't connected. The latter may happen  in rcar_du_encoder_init()
92 	 * on D3 or E3 as the LVDS encoders are needed to provide the pixel  in rcar_du_encoder_init()
93 	 * clock to the DU, even when the LVDS outputs are not used.  in rcar_du_encoder_init()
95 	if (rcdu->info->gen >= 3) {  in rcar_du_encoder_init()
98 			return -ENOLINK;  in rcar_du_encoder_init()
103 			return -ENOLINK;  in rcar_du_encoder_init()
106 	dev_dbg(rcdu->dev, "initializing encoder %pOF for output %s\n",  in rcar_du_encoder_init()
109 	renc = drmm_encoder_alloc(&rcdu->ddev, struct rcar_du_encoder, base,  in rcar_du_encoder_init()
115 	renc->output = output;  in rcar_du_encoder_init()
117 	/* Attach the bridge to the encoder. */  in rcar_du_encoder_init()
118 	ret = drm_bridge_attach(&renc->base, bridge, NULL,  in rcar_du_encoder_init()
121 		dev_err(rcdu->dev,  in rcar_du_encoder_init()
123 			bridge->of_node, rcar_du_output_name(output), ret);  in rcar_du_encoder_init()
128 	connector = drm_bridge_connector_init(&rcdu->ddev, &renc->base);  in rcar_du_encoder_init()
130 		dev_err(rcdu->dev,  in rcar_du_encoder_init()
136 	return drm_connector_attach_encoder(connector, &renc->base);  in rcar_du_encoder_init()