Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Red Hat
4 * based in parts on udlfb.c:
5 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
6 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
7 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
8 */
9
10#include <drm/drm_atomic_state_helper.h>
11#include <drm/drm_crtc_helper.h>
12#include <drm/drm_probe_helper.h>
13
14#include "udl_connector.h"
15#include "udl_drv.h"
16
17static int udl_get_edid_block(void *data, u8 *buf, unsigned int block,
18 size_t len)
19{
20 int ret, i;
21 u8 *read_buff;
22 struct udl_device *udl = data;
23
24 read_buff = kmalloc(2, GFP_KERNEL);
25 if (!read_buff)
26 return -1;
27
28 for (i = 0; i < len; i++) {
29 int bval = (i + block * EDID_LENGTH) << 8;
30 ret = usb_control_msg(udl->udev,
31 usb_rcvctrlpipe(udl->udev, 0),
32 (0x02), (0x80 | (0x02 << 5)), bval,
33 0xA1, read_buff, 2, HZ);
34 if (ret < 1) {
35 DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
36 kfree(read_buff);
37 return -1;
38 }
39 buf[i] = read_buff[1];
40 }
41
42 kfree(read_buff);
43 return 0;
44}
45
46static int udl_get_modes(struct drm_connector *connector)
47{
48 struct udl_drm_connector *udl_connector =
49 container_of(connector,
50 struct udl_drm_connector,
51 connector);
52
53 drm_connector_update_edid_property(connector, udl_connector->edid);
54 if (udl_connector->edid)
55 return drm_add_edid_modes(connector, udl_connector->edid);
56 return 0;
57}
58
59static enum drm_mode_status udl_mode_valid(struct drm_connector *connector,
60 struct drm_display_mode *mode)
61{
62 struct udl_device *udl = to_udl(connector->dev);
63 if (!udl->sku_pixel_limit)
64 return 0;
65
66 if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
67 return MODE_VIRTUAL_Y;
68
69 return 0;
70}
71
72static enum drm_connector_status
73udl_detect(struct drm_connector *connector, bool force)
74{
75 struct udl_device *udl = to_udl(connector->dev);
76 struct udl_drm_connector *udl_connector =
77 container_of(connector,
78 struct udl_drm_connector,
79 connector);
80
81 /* cleanup previous edid */
82 if (udl_connector->edid != NULL) {
83 kfree(udl_connector->edid);
84 udl_connector->edid = NULL;
85 }
86
87 udl_connector->edid = drm_do_get_edid(connector, udl_get_edid_block, udl);
88 if (!udl_connector->edid)
89 return connector_status_disconnected;
90
91 return connector_status_connected;
92}
93
94static void udl_connector_destroy(struct drm_connector *connector)
95{
96 struct udl_drm_connector *udl_connector =
97 container_of(connector,
98 struct udl_drm_connector,
99 connector);
100
101 drm_connector_cleanup(connector);
102 kfree(udl_connector->edid);
103 kfree(connector);
104}
105
106static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
107 .get_modes = udl_get_modes,
108 .mode_valid = udl_mode_valid,
109};
110
111static const struct drm_connector_funcs udl_connector_funcs = {
112 .reset = drm_atomic_helper_connector_reset,
113 .detect = udl_detect,
114 .fill_modes = drm_helper_probe_single_connector_modes,
115 .destroy = udl_connector_destroy,
116 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
117 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
118};
119
120struct drm_connector *udl_connector_init(struct drm_device *dev)
121{
122 struct udl_drm_connector *udl_connector;
123 struct drm_connector *connector;
124
125 udl_connector = kzalloc(sizeof(struct udl_drm_connector), GFP_KERNEL);
126 if (!udl_connector)
127 return ERR_PTR(-ENOMEM);
128
129 connector = &udl_connector->connector;
130 drm_connector_init(dev, connector, &udl_connector_funcs,
131 DRM_MODE_CONNECTOR_DVII);
132 drm_connector_helper_add(connector, &udl_connector_helper_funcs);
133
134 connector->polled = DRM_CONNECTOR_POLL_HPD |
135 DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
136
137 return connector;
138}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Red Hat
4 * based in parts on udlfb.c:
5 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
6 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
7 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
8 */
9
10#include <drm/drm_crtc_helper.h>
11#include <drm/drm_probe_helper.h>
12
13#include "udl_connector.h"
14#include "udl_drv.h"
15
16static int udl_get_edid_block(void *data, u8 *buf, unsigned int block,
17 size_t len)
18{
19 int ret, i;
20 u8 *read_buff;
21 struct udl_device *udl = data;
22
23 read_buff = kmalloc(2, GFP_KERNEL);
24 if (!read_buff)
25 return -1;
26
27 for (i = 0; i < len; i++) {
28 int bval = (i + block * EDID_LENGTH) << 8;
29 ret = usb_control_msg(udl->udev,
30 usb_rcvctrlpipe(udl->udev, 0),
31 (0x02), (0x80 | (0x02 << 5)), bval,
32 0xA1, read_buff, 2, HZ);
33 if (ret < 1) {
34 DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
35 kfree(read_buff);
36 return -1;
37 }
38 buf[i] = read_buff[1];
39 }
40
41 kfree(read_buff);
42 return 0;
43}
44
45static int udl_get_modes(struct drm_connector *connector)
46{
47 struct udl_drm_connector *udl_connector =
48 container_of(connector,
49 struct udl_drm_connector,
50 connector);
51
52 drm_connector_update_edid_property(connector, udl_connector->edid);
53 if (udl_connector->edid)
54 return drm_add_edid_modes(connector, udl_connector->edid);
55 return 0;
56}
57
58static enum drm_mode_status udl_mode_valid(struct drm_connector *connector,
59 struct drm_display_mode *mode)
60{
61 struct udl_device *udl = connector->dev->dev_private;
62 if (!udl->sku_pixel_limit)
63 return 0;
64
65 if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
66 return MODE_VIRTUAL_Y;
67
68 return 0;
69}
70
71static enum drm_connector_status
72udl_detect(struct drm_connector *connector, bool force)
73{
74 struct udl_device *udl = connector->dev->dev_private;
75 struct udl_drm_connector *udl_connector =
76 container_of(connector,
77 struct udl_drm_connector,
78 connector);
79
80 /* cleanup previous edid */
81 if (udl_connector->edid != NULL) {
82 kfree(udl_connector->edid);
83 udl_connector->edid = NULL;
84 }
85
86 udl_connector->edid = drm_do_get_edid(connector, udl_get_edid_block, udl);
87 if (!udl_connector->edid)
88 return connector_status_disconnected;
89
90 return connector_status_connected;
91}
92
93static struct drm_encoder*
94udl_best_single_encoder(struct drm_connector *connector)
95{
96 int enc_id = connector->encoder_ids[0];
97 return drm_encoder_find(connector->dev, NULL, enc_id);
98}
99
100static int udl_connector_set_property(struct drm_connector *connector,
101 struct drm_property *property,
102 uint64_t val)
103{
104 return 0;
105}
106
107static void udl_connector_destroy(struct drm_connector *connector)
108{
109 struct udl_drm_connector *udl_connector =
110 container_of(connector,
111 struct udl_drm_connector,
112 connector);
113
114 drm_connector_unregister(connector);
115 drm_connector_cleanup(connector);
116 kfree(udl_connector->edid);
117 kfree(connector);
118}
119
120static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
121 .get_modes = udl_get_modes,
122 .mode_valid = udl_mode_valid,
123 .best_encoder = udl_best_single_encoder,
124};
125
126static const struct drm_connector_funcs udl_connector_funcs = {
127 .dpms = drm_helper_connector_dpms,
128 .detect = udl_detect,
129 .fill_modes = drm_helper_probe_single_connector_modes,
130 .destroy = udl_connector_destroy,
131 .set_property = udl_connector_set_property,
132};
133
134int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder)
135{
136 struct udl_drm_connector *udl_connector;
137 struct drm_connector *connector;
138
139 udl_connector = kzalloc(sizeof(struct udl_drm_connector), GFP_KERNEL);
140 if (!udl_connector)
141 return -ENOMEM;
142
143 connector = &udl_connector->connector;
144 drm_connector_init(dev, connector, &udl_connector_funcs,
145 DRM_MODE_CONNECTOR_DVII);
146 drm_connector_helper_add(connector, &udl_connector_helper_funcs);
147
148 drm_connector_register(connector);
149 drm_connector_attach_encoder(connector, encoder);
150 connector->polled = DRM_CONNECTOR_POLL_HPD |
151 DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
152
153 return 0;
154}