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_bridge.h>
 9#include <drm/drm_crtc.h>
10#include <drm/drm_encoder.h>
11#include <drm/drm_device.h>
12
13#include "arcpgu.h"
14
15static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
16	.destroy = drm_encoder_cleanup,
17};
18
19int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
20{
21	struct drm_encoder *encoder;
22	struct drm_bridge *bridge;
23
24	int ret = 0;
25
26	encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
27	if (encoder == NULL)
28		return -ENOMEM;
29
30	/* Locate drm bridge from the hdmi encoder DT node */
31	bridge = of_drm_find_bridge(np);
32	if (!bridge)
33		return -EPROBE_DEFER;
34
35	encoder->possible_crtcs = 1;
36	encoder->possible_clones = 0;
37	ret = drm_encoder_init(drm, encoder, &arcpgu_drm_encoder_funcs,
38			       DRM_MODE_ENCODER_TMDS, NULL);
39	if (ret)
40		return ret;
41
42	/* Link drm_bridge to encoder */
43	ret = drm_bridge_attach(encoder, bridge, NULL, 0);
44	if (ret)
45		drm_encoder_cleanup(encoder);
46
47	return ret;
48}