1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * ARC PGU DRM driver.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <drm/drm_bridge.h>
9*4882a593Smuzhiyun #include <drm/drm_crtc.h>
10*4882a593Smuzhiyun #include <drm/drm_encoder.h>
11*4882a593Smuzhiyun #include <drm/drm_device.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "arcpgu.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
16*4882a593Smuzhiyun .destroy = drm_encoder_cleanup,
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun
arcpgu_drm_hdmi_init(struct drm_device * drm,struct device_node * np)19*4882a593Smuzhiyun int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct drm_encoder *encoder;
22*4882a593Smuzhiyun struct drm_bridge *bridge;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun int ret = 0;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
27*4882a593Smuzhiyun if (encoder == NULL)
28*4882a593Smuzhiyun return -ENOMEM;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun /* Locate drm bridge from the hdmi encoder DT node */
31*4882a593Smuzhiyun bridge = of_drm_find_bridge(np);
32*4882a593Smuzhiyun if (!bridge)
33*4882a593Smuzhiyun return -EPROBE_DEFER;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun encoder->possible_crtcs = 1;
36*4882a593Smuzhiyun encoder->possible_clones = 0;
37*4882a593Smuzhiyun ret = drm_encoder_init(drm, encoder, &arcpgu_drm_encoder_funcs,
38*4882a593Smuzhiyun DRM_MODE_ENCODER_TMDS, NULL);
39*4882a593Smuzhiyun if (ret)
40*4882a593Smuzhiyun return ret;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun /* Link drm_bridge to encoder */
43*4882a593Smuzhiyun ret = drm_bridge_attach(encoder, bridge, NULL, 0);
44*4882a593Smuzhiyun if (ret)
45*4882a593Smuzhiyun drm_encoder_cleanup(encoder);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return ret;
48*4882a593Smuzhiyun }
49