1/* $NetBSD: intel_connector.c,v 1.2 2021/12/18 23:45:29 riastradh Exp $ */ 2 3/* 4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 5 * Copyright (c) 2007, 2010 Intel Corporation 6 * Jesse Barnes <jesse.barnes@intel.com> 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the "Software"), 10 * to deal in the Software without restriction, including without limitation 11 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 12 * and/or sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the next 16 * paragraph) shall be included in all copies or substantial portions of the 17 * Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 * DEALINGS IN THE SOFTWARE. 26 */ 27 28#include <sys/cdefs.h> 29__KERNEL_RCSID(0, "$NetBSD: intel_connector.c,v 1.2 2021/12/18 23:45:29 riastradh Exp $"); 30 31#include <linux/i2c.h> 32#include <linux/slab.h> 33 34#include <drm/drm_atomic_helper.h> 35#include <drm/drm_edid.h> 36 37#include "display/intel_panel.h" 38 39#include "i915_drv.h" 40#include "intel_connector.h" 41#include "intel_display_types.h" 42#include "intel_hdcp.h" 43 44int intel_connector_init(struct intel_connector *connector) 45{ 46 struct intel_digital_connector_state *conn_state; 47 48 /* 49 * Allocate enough memory to hold intel_digital_connector_state, 50 * This might be a few bytes too many, but for connectors that don't 51 * need it we'll free the state and allocate a smaller one on the first 52 * successful commit anyway. 53 */ 54 conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL); 55 if (!conn_state) 56 return -ENOMEM; 57 58 __drm_atomic_helper_connector_reset(&connector->base, 59 &conn_state->base); 60 61 return 0; 62} 63 64struct intel_connector *intel_connector_alloc(void) 65{ 66 struct intel_connector *connector; 67 68 connector = kzalloc(sizeof(*connector), GFP_KERNEL); 69 if (!connector) 70 return NULL; 71 72 if (intel_connector_init(connector) < 0) { 73 kfree(connector); 74 return NULL; 75 } 76 77 return connector; 78} 79 80/* 81 * Free the bits allocated by intel_connector_alloc. 82 * This should only be used after intel_connector_alloc has returned 83 * successfully, and before drm_connector_init returns successfully. 84 * Otherwise the destroy callbacks for the connector and the state should 85 * take care of proper cleanup/free (see intel_connector_destroy). 86 */ 87void intel_connector_free(struct intel_connector *connector) 88{ 89 kfree(to_intel_digital_connector_state(connector->base.state)); 90 kfree(connector); 91} 92 93/* 94 * Connector type independent destroy hook for drm_connector_funcs. 95 */ 96void intel_connector_destroy(struct drm_connector *connector) 97{ 98 struct intel_connector *intel_connector = to_intel_connector(connector); 99 100 kfree(intel_connector->detect_edid); 101 102 intel_hdcp_cleanup(intel_connector); 103 104 if (!IS_ERR_OR_NULL(intel_connector->edid)) 105 kfree(intel_connector->edid); 106 107 intel_panel_fini(&intel_connector->panel); 108 109 drm_connector_cleanup(connector); 110 111 if (intel_connector->port) 112 drm_dp_mst_put_port_malloc(intel_connector->port); 113 114 kfree(connector); 115} 116 117int intel_connector_register(struct drm_connector *connector) 118{ 119 struct intel_connector *intel_connector = to_intel_connector(connector); 120 int ret; 121 122 ret = intel_backlight_device_register(intel_connector); 123 if (ret) 124 goto err; 125 126 if (i915_inject_probe_failure(to_i915(connector->dev))) { 127 ret = -EFAULT; 128 goto err_backlight; 129 } 130 131 return 0; 132 133err_backlight: 134 intel_backlight_device_unregister(intel_connector); 135err: 136 return ret; 137} 138 139void intel_connector_unregister(struct drm_connector *connector) 140{ 141 struct intel_connector *intel_connector = to_intel_connector(connector); 142 143 intel_backlight_device_unregister(intel_connector); 144} 145 146void intel_connector_attach_encoder(struct intel_connector *connector, 147 struct intel_encoder *encoder) 148{ 149 connector->encoder = encoder; 150 drm_connector_attach_encoder(&connector->base, &encoder->base); 151} 152 153/* 154 * Simple connector->get_hw_state implementation for encoders that support only 155 * one connector and no cloning and hence the encoder state determines the state 156 * of the connector. 157 */ 158bool intel_connector_get_hw_state(struct intel_connector *connector) 159{ 160 enum pipe pipe = 0; 161 struct intel_encoder *encoder = connector->encoder; 162 163 return encoder->get_hw_state(encoder, &pipe); 164} 165 166enum pipe intel_connector_get_pipe(struct intel_connector *connector) 167{ 168 struct drm_device *dev = connector->base.dev; 169 170 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 171 172 if (!connector->base.state->crtc) 173 return INVALID_PIPE; 174 175 return to_intel_crtc(connector->base.state->crtc)->pipe; 176} 177 178/** 179 * intel_connector_update_modes - update connector from edid 180 * @connector: DRM connector device to use 181 * @edid: previously read EDID information 182 */ 183int intel_connector_update_modes(struct drm_connector *connector, 184 struct edid *edid) 185{ 186 int ret; 187 188 drm_connector_update_edid_property(connector, edid); 189 ret = drm_add_edid_modes(connector, edid); 190 191 return ret; 192} 193 194/** 195 * intel_ddc_get_modes - get modelist from monitor 196 * @connector: DRM connector device to use 197 * @adapter: i2c adapter 198 * 199 * Fetch the EDID information from @connector using the DDC bus. 200 */ 201int intel_ddc_get_modes(struct drm_connector *connector, 202 struct i2c_adapter *adapter) 203{ 204 struct edid *edid; 205 int ret; 206 207 edid = drm_get_edid(connector, adapter); 208 if (!edid) 209 return 0; 210 211 ret = intel_connector_update_modes(connector, edid); 212 kfree(edid); 213 214 return ret; 215} 216 217static const struct drm_prop_enum_list force_audio_names[] = { 218 { HDMI_AUDIO_OFF_DVI, "force-dvi" }, 219 { HDMI_AUDIO_OFF, "off" }, 220 { HDMI_AUDIO_AUTO, "auto" }, 221 { HDMI_AUDIO_ON, "on" }, 222}; 223 224void 225intel_attach_force_audio_property(struct drm_connector *connector) 226{ 227 struct drm_device *dev = connector->dev; 228 struct drm_i915_private *dev_priv = to_i915(dev); 229 struct drm_property *prop; 230 231 prop = dev_priv->force_audio_property; 232 if (prop == NULL) { 233 prop = drm_property_create_enum(dev, 0, 234 "audio", 235 force_audio_names, 236 ARRAY_SIZE(force_audio_names)); 237 if (prop == NULL) 238 return; 239 240 dev_priv->force_audio_property = prop; 241 } 242 drm_object_attach_property(&connector->base, prop, 0); 243} 244 245static const struct drm_prop_enum_list broadcast_rgb_names[] = { 246 { INTEL_BROADCAST_RGB_AUTO, "Automatic" }, 247 { INTEL_BROADCAST_RGB_FULL, "Full" }, 248 { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" }, 249}; 250 251void 252intel_attach_broadcast_rgb_property(struct drm_connector *connector) 253{ 254 struct drm_device *dev = connector->dev; 255 struct drm_i915_private *dev_priv = to_i915(dev); 256 struct drm_property *prop; 257 258 prop = dev_priv->broadcast_rgb_property; 259 if (prop == NULL) { 260 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, 261 "Broadcast RGB", 262 broadcast_rgb_names, 263 ARRAY_SIZE(broadcast_rgb_names)); 264 if (prop == NULL) 265 return; 266 267 dev_priv->broadcast_rgb_property = prop; 268 } 269 270 drm_object_attach_property(&connector->base, prop, 0); 271} 272 273void 274intel_attach_aspect_ratio_property(struct drm_connector *connector) 275{ 276 if (!drm_mode_create_aspect_ratio_property(connector->dev)) 277 drm_object_attach_property(&connector->base, 278 connector->dev->mode_config.aspect_ratio_property, 279 DRM_MODE_PICTURE_ASPECT_NONE); 280} 281 282void 283intel_attach_colorspace_property(struct drm_connector *connector) 284{ 285 switch (connector->connector_type) { 286 case DRM_MODE_CONNECTOR_HDMIA: 287 case DRM_MODE_CONNECTOR_HDMIB: 288 if (drm_mode_create_hdmi_colorspace_property(connector)) 289 return; 290 break; 291 case DRM_MODE_CONNECTOR_DisplayPort: 292 case DRM_MODE_CONNECTOR_eDP: 293 if (drm_mode_create_dp_colorspace_property(connector)) 294 return; 295 break; 296 default: 297 DRM_DEBUG_KMS("Colorspace property not supported\n"); 298 return; 299 } 300 301 drm_object_attach_property(&connector->base, 302 connector->colorspace_property, 0); 303} 304