1/*
2 * Copyright (C) 2012 Red Hat
3 * based in parts on udlfb.c:
4 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
5 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
6 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License v2. See the file COPYING in the main directory of this archive for
10 * more details.
11 */
12
13#include "drmP.h"
14#include "drm_crtc.h"
15#include "drm_edid.h"
16#include "drm_crtc_helper.h"
17#include "udl_drv.h"
18
19/* dummy connector to just get EDID,
20   all UDL appear to have a DVI-D */
21
22static u8 *udl_get_edid(struct udl_device *udl)
23{
24	u8 *block;
25	char rbuf[3];
26	int ret, i;
27
28	block = kmalloc(EDID_LENGTH, GFP_KERNEL);
29	if (block == NULL)
30		return NULL;
31
32	for (i = 0; i < EDID_LENGTH; i++) {
33		ret = usb_control_msg(udl->ddev->usbdev,
34				      usb_rcvctrlpipe(udl->ddev->usbdev, 0), (0x02),
35				      (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2,
36				      HZ);
37		if (ret < 1) {
38			DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
39			i--;
40			goto error;
41		}
42		block[i] = rbuf[1];
43	}
44
45	return block;
46
47error:
48	kfree(block);
49	return NULL;
50}
51
52static int udl_get_modes(struct drm_connector *connector)
53{
54	struct udl_device *udl = connector->dev->dev_private;
55	struct edid *edid;
56	int ret;
57
58	edid = (struct edid *)udl_get_edid(udl);
59
60	connector->display_info.raw_edid = (char *)edid;
61
62	drm_mode_connector_update_edid_property(connector, edid);
63	ret = drm_add_edid_modes(connector, edid);
64	connector->display_info.raw_edid = NULL;
65	kfree(edid);
66	return ret;
67}
68
69static int udl_mode_valid(struct drm_connector *connector,
70			  struct drm_display_mode *mode)
71{
72	return 0;
73}
74
75static enum drm_connector_status
76udl_detect(struct drm_connector *connector, bool force)
77{
78	if (drm_device_is_unplugged(connector->dev))
79		return connector_status_disconnected;
80	return connector_status_connected;
81}
82
83struct drm_encoder *udl_best_single_encoder(struct drm_connector *connector)
84{
85	int enc_id = connector->encoder_ids[0];
86	struct drm_mode_object *obj;
87	struct drm_encoder *encoder;
88
89	obj = drm_mode_object_find(connector->dev, enc_id, DRM_MODE_OBJECT_ENCODER);
90	if (!obj)
91		return NULL;
92	encoder = obj_to_encoder(obj);
93	return encoder;
94}
95
96int udl_connector_set_property(struct drm_connector *connector, struct drm_property *property,
97			       uint64_t val)
98{
99	return 0;
100}
101
102static void udl_connector_destroy(struct drm_connector *connector)
103{
104	drm_sysfs_connector_remove(connector);
105	drm_connector_cleanup(connector);
106	kfree(connector);
107}
108
109struct drm_connector_helper_funcs udl_connector_helper_funcs = {
110	.get_modes = udl_get_modes,
111	.mode_valid = udl_mode_valid,
112	.best_encoder = udl_best_single_encoder,
113};
114
115struct drm_connector_funcs udl_connector_funcs = {
116	.dpms = drm_helper_connector_dpms,
117	.detect = udl_detect,
118	.fill_modes = drm_helper_probe_single_connector_modes,
119	.destroy = udl_connector_destroy,
120	.set_property = udl_connector_set_property,
121};
122
123int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder)
124{
125	struct drm_connector *connector;
126
127	connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL);
128	if (!connector)
129		return -ENOMEM;
130
131	drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_DVII);
132	drm_connector_helper_add(connector, &udl_connector_helper_funcs);
133
134	drm_sysfs_connector_add(connector);
135	drm_mode_connector_attach_encoder(connector, encoder);
136
137	drm_connector_attach_property(connector,
138				      dev->mode_config.dirty_info_property,
139				      1);
140	return 0;
141}
142