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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}
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 struct udl_device *udl = connector->dev->dev_private;
73 if (!udl->sku_pixel_limit)
74 return 0;
75
76 if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
77 return MODE_VIRTUAL_Y;
78
79 return 0;
80}
81
82static enum drm_connector_status
83udl_detect(struct drm_connector *connector, bool force)
84{
85 if (drm_device_is_unplugged(connector->dev))
86 return connector_status_disconnected;
87 return connector_status_connected;
88}
89
90struct drm_encoder *udl_best_single_encoder(struct drm_connector *connector)
91{
92 int enc_id = connector->encoder_ids[0];
93 struct drm_mode_object *obj;
94 struct drm_encoder *encoder;
95
96 obj = drm_mode_object_find(connector->dev, enc_id, DRM_MODE_OBJECT_ENCODER);
97 if (!obj)
98 return NULL;
99 encoder = obj_to_encoder(obj);
100 return encoder;
101}
102
103int udl_connector_set_property(struct drm_connector *connector, struct drm_property *property,
104 uint64_t val)
105{
106 return 0;
107}
108
109static void udl_connector_destroy(struct drm_connector *connector)
110{
111 drm_sysfs_connector_remove(connector);
112 drm_connector_cleanup(connector);
113 kfree(connector);
114}
115
116struct drm_connector_helper_funcs udl_connector_helper_funcs = {
117 .get_modes = udl_get_modes,
118 .mode_valid = udl_mode_valid,
119 .best_encoder = udl_best_single_encoder,
120};
121
122struct drm_connector_funcs udl_connector_funcs = {
123 .dpms = drm_helper_connector_dpms,
124 .detect = udl_detect,
125 .fill_modes = drm_helper_probe_single_connector_modes,
126 .destroy = udl_connector_destroy,
127 .set_property = udl_connector_set_property,
128};
129
130int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder)
131{
132 struct drm_connector *connector;
133
134 connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL);
135 if (!connector)
136 return -ENOMEM;
137
138 drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_DVII);
139 drm_connector_helper_add(connector, &udl_connector_helper_funcs);
140
141 drm_sysfs_connector_add(connector);
142 drm_mode_connector_attach_encoder(connector, encoder);
143
144 drm_connector_attach_property(connector,
145 dev->mode_config.dirty_info_property,
146 1);
147 return 0;
148}