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>
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
14 #include <drm/drm_crtc.h>
15 #include <drm/drm_edid.h>
16 #include <drm/drm_crtc_helper.h>
19 /* dummy connector to just get EDID,
20 all UDL appear to have a DVI-D */
22 static u8 *udl_get_edid(struct udl_device *udl)
28 block = kmalloc(EDID_LENGTH, GFP_KERNEL);
32 rbuf = kmalloc(2, GFP_KERNEL);
36 for (i = 0; i < EDID_LENGTH; i++) {
37 ret = usb_control_msg(udl->ddev->usbdev,
38 usb_rcvctrlpipe(udl->ddev->usbdev, 0), (0x02),
39 (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2,
42 DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
58 static int udl_get_modes(struct drm_connector *connector)
60 struct udl_device *udl = connector->dev->dev_private;
64 edid = (struct edid *)udl_get_edid(udl);
67 * We only read the main block, but if the monitor reports extension
68 * blocks then the drm edid code expects them to be present, so patch
69 * the extension count to 0.
71 edid->checksum += edid->extensions;
74 drm_mode_connector_update_edid_property(connector, edid);
75 ret = drm_add_edid_modes(connector, edid);
80 static int udl_mode_valid(struct drm_connector *connector,
81 struct drm_display_mode *mode)
83 struct udl_device *udl = connector->dev->dev_private;
84 if (!udl->sku_pixel_limit)
87 if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
88 return MODE_VIRTUAL_Y;
93 static enum drm_connector_status
94 udl_detect(struct drm_connector *connector, bool force)
96 if (drm_device_is_unplugged(connector->dev))
97 return connector_status_disconnected;
98 return connector_status_connected;
101 static struct drm_encoder*
102 udl_best_single_encoder(struct drm_connector *connector)
104 int enc_id = connector->encoder_ids[0];
105 struct drm_mode_object *obj;
106 struct drm_encoder *encoder;
108 obj = drm_mode_object_find(connector->dev, enc_id, DRM_MODE_OBJECT_ENCODER);
111 encoder = obj_to_encoder(obj);
115 static int udl_connector_set_property(struct drm_connector *connector,
116 struct drm_property *property,
122 static void udl_connector_destroy(struct drm_connector *connector)
124 drm_sysfs_connector_remove(connector);
125 drm_connector_cleanup(connector);
129 static struct drm_connector_helper_funcs udl_connector_helper_funcs = {
130 .get_modes = udl_get_modes,
131 .mode_valid = udl_mode_valid,
132 .best_encoder = udl_best_single_encoder,
135 static struct drm_connector_funcs udl_connector_funcs = {
136 .dpms = drm_helper_connector_dpms,
137 .detect = udl_detect,
138 .fill_modes = drm_helper_probe_single_connector_modes,
139 .destroy = udl_connector_destroy,
140 .set_property = udl_connector_set_property,
143 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder)
145 struct drm_connector *connector;
147 connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL);
151 drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_DVII);
152 drm_connector_helper_add(connector, &udl_connector_helper_funcs);
154 drm_sysfs_connector_add(connector);
155 drm_mode_connector_attach_encoder(connector, encoder);
157 drm_object_attach_property(&connector->base,
158 dev->mode_config.dirty_info_property,