1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Red Hat
* based in parts on udlfb.c:
* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
* Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
*/
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_probe_helper.h>
#include "udl_connector.h"
#include "udl_drv.h"
static int udl_get_edid_block(void *data, u8 *buf, unsigned int block,
size_t len)
{
int ret, i;
u8 *read_buff;
struct udl_device *udl = data;
struct usb_device *udev = udl_to_usb_device(udl);
read_buff = kmalloc(2, GFP_KERNEL);
if (!read_buff)
return -1;
for (i = 0; i < len; i++) {
int bval = (i + block * EDID_LENGTH) << 8;
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x02, (0x80 | (0x02 << 5)), bval,
0xA1, read_buff, 2, 1000);
if (ret < 1) {
DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
kfree(read_buff);
return -1;
}
buf[i] = read_buff[1];
}
kfree(read_buff);
return 0;
}
static int udl_get_modes(struct drm_connector *connector)
{
struct udl_drm_connector *udl_connector =
container_of(connector,
struct udl_drm_connector,
connector);
drm_connector_update_edid_property(connector, udl_connector->edid);
if (udl_connector->edid)
return drm_add_edid_modes(connector, udl_connector->edid);
return 0;
}
static enum drm_mode_status udl_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct udl_device *udl = to_udl(connector->dev);
if (!udl->sku_pixel_limit)
return 0;
if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
return MODE_VIRTUAL_Y;
return 0;
}
static enum drm_connector_status
udl_detect(struct drm_connector *connector, bool force)
{
struct udl_device *udl = to_udl(connector->dev);
struct udl_drm_connector *udl_connector =
container_of(connector,
struct udl_drm_connector,
connector);
/* cleanup previous edid */
if (udl_connector->edid != NULL) {
kfree(udl_connector->edid);
udl_connector->edid = NULL;
}
udl_connector->edid = drm_do_get_edid(connector, udl_get_edid_block, udl);
if (!udl_connector->edid)
return connector_status_disconnected;
return connector_status_connected;
}
static void udl_connector_destroy(struct drm_connector *connector)
{
struct udl_drm_connector *udl_connector =
container_of(connector,
struct udl_drm_connector,
connector);
drm_connector_cleanup(connector);
kfree(udl_connector->edid);
kfree(connector);
}
static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
.get_modes = udl_get_modes,
.mode_valid = udl_mode_valid,
};
static const struct drm_connector_funcs udl_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.detect = udl_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = udl_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
struct drm_connector *udl_connector_init(struct drm_device *dev)
{
struct udl_drm_connector *udl_connector;
struct drm_connector *connector;
udl_connector = kzalloc(sizeof(struct udl_drm_connector), GFP_KERNEL);
if (!udl_connector)
return ERR_PTR(-ENOMEM);
connector = &udl_connector->connector;
drm_connector_init(dev, connector, &udl_connector_funcs,
DRM_MODE_CONNECTOR_VGA);
drm_connector_helper_add(connector, &udl_connector_helper_funcs);
connector->polled = DRM_CONNECTOR_POLL_HPD |
DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
return connector;
}
|
