Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2015 Texas Instruments
4 * Author: Jyri Sarha <jsarha@ti.com>
5 */
6
7#include <linux/of_graph.h>
8
9#include <drm/drm_atomic_helper.h>
10#include <drm/drm_bridge.h>
11#include <drm/drm_bridge_connector.h>
12#include <drm/drm_of.h>
13#include <drm/drm_simple_kms_helper.h>
14
15#include "tilcdc_drv.h"
16#include "tilcdc_encoder.h"
17
18static
19int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge)
20{
21 struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(ddev);
22 struct drm_connector *connector;
23 int ret;
24
25 priv->encoder->base.possible_crtcs = BIT(0);
26
27 ret = drm_bridge_attach(&priv->encoder->base, bridge, NULL,
28 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
29 if (ret)
30 return ret;
31
32 connector = drm_bridge_connector_init(ddev, &priv->encoder->base);
33 if (IS_ERR(connector)) {
34 drm_err(ddev, "bridge_connector create failed\n");
35 return PTR_ERR(connector);
36 }
37
38 ret = drm_connector_attach_encoder(connector, &priv->encoder->base);
39 if (ret) {
40 drm_err(ddev, "attaching encoder to connector failed\n");
41 return ret;
42 }
43
44 priv->connector = connector;
45 return 0;
46}
47
48int tilcdc_encoder_create(struct drm_device *ddev)
49{
50 struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(ddev);
51 struct tilcdc_encoder *encoder;
52 struct drm_bridge *bridge;
53
54 bridge = devm_drm_of_get_bridge(ddev->dev, ddev->dev->of_node, 0, 0);
55 if (PTR_ERR(bridge) == -ENODEV)
56 return 0;
57 else if (IS_ERR(bridge))
58 return PTR_ERR(bridge);
59
60 encoder = drmm_simple_encoder_alloc(ddev, struct tilcdc_encoder,
61 base, DRM_MODE_ENCODER_NONE);
62 if (IS_ERR(encoder)) {
63 drm_err(ddev, "drm_encoder_init() failed %pe\n", encoder);
64 return PTR_ERR(encoder);
65 }
66 priv->encoder = encoder;
67
68 return tilcdc_attach_bridge(ddev, bridge);
69}