/*
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* rcar_du_encoder.c -- R-Car Display Unit Encoder
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*
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* Copyright (C) 2013-2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/export.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_panel.h>
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#include "rcar_du_drv.h"
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#include "rcar_du_encoder.h"
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#include "rcar_du_kms.h"
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/* -----------------------------------------------------------------------------
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* Encoder
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*/
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static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state)
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{
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struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
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rcar_du_crtc_route_output(crtc_state->crtc, renc->output);
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}
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static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
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.atomic_mode_set = rcar_du_encoder_mode_set,
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};
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static const struct drm_encoder_funcs encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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int rcar_du_encoder_init(struct rcar_du_device *rcdu,
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enum rcar_du_output output,
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struct device_node *enc_node,
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struct device_node *con_node)
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{
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struct rcar_du_encoder *renc;
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struct drm_encoder *encoder;
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struct drm_bridge *bridge = NULL;
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int ret;
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renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
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if (renc == NULL)
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return -ENOMEM;
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renc->output = output;
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encoder = rcar_encoder_to_drm_encoder(renc);
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dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
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enc_node, output);
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/* Locate the DRM bridge from the encoder DT node. */
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bridge = of_drm_find_bridge(enc_node);
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if (!bridge) {
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ret = -EPROBE_DEFER;
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goto done;
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}
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ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
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DRM_MODE_ENCODER_NONE, NULL);
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if (ret < 0)
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goto done;
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drm_encoder_helper_add(encoder, &encoder_helper_funcs);
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/*
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* Attach the bridge to the encoder. The bridge will create the
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* connector.
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*/
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ret = drm_bridge_attach(encoder, bridge, NULL);
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if (ret) {
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drm_encoder_cleanup(encoder);
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return ret;
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}
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done:
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if (ret < 0) {
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if (encoder->name)
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encoder->funcs->destroy(encoder);
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devm_kfree(rcdu->dev, renc);
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}
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return ret;
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}
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