1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * ARC PGU DRM driver.
 4 *
 5 * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
 6 */
 7
 8#include <drm/drm_crtc.h>
 9#include <drm/drm_encoder.h>
10#include <drm/drm_device.h>
11
12#include "arcpgu.h"
13
14static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
15	.destroy = drm_encoder_cleanup,
16};
17
18int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
19{
20	struct drm_encoder *encoder;
21	struct drm_bridge *bridge;
22
23	int ret = 0;
24
25	encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
26	if (encoder == NULL)
27		return -ENOMEM;
28
29	/* Locate drm bridge from the hdmi encoder DT node */
30	bridge = of_drm_find_bridge(np);
31	if (!bridge)
32		return -EPROBE_DEFER;
33
34	encoder->possible_crtcs = 1;
35	encoder->possible_clones = 0;
36	ret = drm_encoder_init(drm, encoder, &arcpgu_drm_encoder_funcs,
37			       DRM_MODE_ENCODER_TMDS, NULL);
38	if (ret)
39		return ret;
40
41	/* Link drm_bridge to encoder */
42	ret = drm_bridge_attach(encoder, bridge, NULL);
43	if (ret)
44		drm_encoder_cleanup(encoder);
45
46	return ret;
47}