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