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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 <drm/drmP.h>
14#include <drm/drm_crtc.h>
15#include <drm/drm_edid.h>
16#include <drm/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;
26 int ret, i;
27
28 block = kmalloc(EDID_LENGTH, GFP_KERNEL);
29 if (block == NULL)
30 return NULL;
31
32 rbuf = kmalloc(2, GFP_KERNEL);
33 if (rbuf == NULL)
34 goto error;
35
36 for (i = 0; i < EDID_LENGTH; i++) {
37 ret = usb_control_msg(udl->udev,
38 usb_rcvctrlpipe(udl->udev, 0), (0x02),
39 (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2,
40 HZ);
41 if (ret < 1) {
42 DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
43 goto error;
44 }
45 block[i] = rbuf[1];
46 }
47
48 kfree(rbuf);
49 return block;
50
51error:
52 kfree(block);
53 kfree(rbuf);
54 return NULL;
55}
56
57static int udl_get_modes(struct drm_connector *connector)
58{
59 struct udl_device *udl = connector->dev->dev_private;
60 struct edid *edid;
61 int ret;
62
63 edid = (struct edid *)udl_get_edid(udl);
64 if (!edid) {
65 drm_mode_connector_update_edid_property(connector, NULL);
66 return 0;
67 }
68
69 /*
70 * We only read the main block, but if the monitor reports extension
71 * blocks then the drm edid code expects them to be present, so patch
72 * the extension count to 0.
73 */
74 edid->checksum += edid->extensions;
75 edid->extensions = 0;
76
77 drm_mode_connector_update_edid_property(connector, edid);
78 ret = drm_add_edid_modes(connector, edid);
79 kfree(edid);
80 return ret;
81}
82
83static int udl_mode_valid(struct drm_connector *connector,
84 struct drm_display_mode *mode)
85{
86 struct udl_device *udl = connector->dev->dev_private;
87 if (!udl->sku_pixel_limit)
88 return 0;
89
90 if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
91 return MODE_VIRTUAL_Y;
92
93 return 0;
94}
95
96static enum drm_connector_status
97udl_detect(struct drm_connector *connector, bool force)
98{
99 if (drm_device_is_unplugged(connector->dev))
100 return connector_status_disconnected;
101 return connector_status_connected;
102}
103
104static struct drm_encoder*
105udl_best_single_encoder(struct drm_connector *connector)
106{
107 int enc_id = connector->encoder_ids[0];
108 return drm_encoder_find(connector->dev, enc_id);
109}
110
111static int udl_connector_set_property(struct drm_connector *connector,
112 struct drm_property *property,
113 uint64_t val)
114{
115 return 0;
116}
117
118static void udl_connector_destroy(struct drm_connector *connector)
119{
120 drm_connector_unregister(connector);
121 drm_connector_cleanup(connector);
122 kfree(connector);
123}
124
125static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
126 .get_modes = udl_get_modes,
127 .mode_valid = udl_mode_valid,
128 .best_encoder = udl_best_single_encoder,
129};
130
131static const struct drm_connector_funcs udl_connector_funcs = {
132 .dpms = drm_helper_connector_dpms,
133 .detect = udl_detect,
134 .fill_modes = drm_helper_probe_single_connector_modes,
135 .destroy = udl_connector_destroy,
136 .set_property = udl_connector_set_property,
137};
138
139int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder)
140{
141 struct drm_connector *connector;
142
143 connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL);
144 if (!connector)
145 return -ENOMEM;
146
147 drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_DVII);
148 drm_connector_helper_add(connector, &udl_connector_helper_funcs);
149
150 drm_connector_register(connector);
151 drm_mode_connector_attach_encoder(connector, encoder);
152
153 drm_object_attach_property(&connector->base,
154 dev->mode_config.dirty_info_property,
155 1);
156 return 0;
157}
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}