| 1 | // SPDX-License-Identifier: GPL-2.0-or-later | 
|---|
| 2 | /* | 
|---|
| 3 | * Copyright (C) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 
|---|
| 4 | * Copyright (C) 2017 Broadcom | 
|---|
| 5 | */ | 
|---|
| 6 |  | 
|---|
| 7 | #include <linux/debugfs.h> | 
|---|
| 8 | #include <linux/export.h> | 
|---|
| 9 |  | 
|---|
| 10 | #include <drm/drm_atomic_helper.h> | 
|---|
| 11 | #include <drm/drm_bridge.h> | 
|---|
| 12 | #include <drm/drm_connector.h> | 
|---|
| 13 | #include <drm/drm_encoder.h> | 
|---|
| 14 | #include <drm/drm_managed.h> | 
|---|
| 15 | #include <drm/drm_modeset_helper_vtables.h> | 
|---|
| 16 | #include <drm/drm_of.h> | 
|---|
| 17 | #include <drm/drm_panel.h> | 
|---|
| 18 | #include <drm/drm_print.h> | 
|---|
| 19 | #include <drm/drm_probe_helper.h> | 
|---|
| 20 |  | 
|---|
| 21 | struct panel_bridge { | 
|---|
| 22 | struct drm_bridge bridge; | 
|---|
| 23 | struct drm_connector connector; | 
|---|
| 24 | struct drm_panel *panel; | 
|---|
| 25 | u32 connector_type; | 
|---|
| 26 | }; | 
|---|
| 27 |  | 
|---|
| 28 | static inline struct panel_bridge * | 
|---|
| 29 | drm_bridge_to_panel_bridge(struct drm_bridge *bridge) | 
|---|
| 30 | { | 
|---|
| 31 | return container_of(bridge, struct panel_bridge, bridge); | 
|---|
| 32 | } | 
|---|
| 33 |  | 
|---|
| 34 | static inline struct panel_bridge * | 
|---|
| 35 | drm_connector_to_panel_bridge(struct drm_connector *connector) | 
|---|
| 36 | { | 
|---|
| 37 | return container_of(connector, struct panel_bridge, connector); | 
|---|
| 38 | } | 
|---|
| 39 |  | 
|---|
| 40 | static int panel_bridge_connector_get_modes(struct drm_connector *connector) | 
|---|
| 41 | { | 
|---|
| 42 | struct panel_bridge *panel_bridge = | 
|---|
| 43 | drm_connector_to_panel_bridge(connector); | 
|---|
| 44 |  | 
|---|
| 45 | return drm_panel_get_modes(panel: panel_bridge->panel, connector); | 
|---|
| 46 | } | 
|---|
| 47 |  | 
|---|
| 48 | static const struct drm_connector_helper_funcs | 
|---|
| 49 | panel_bridge_connector_helper_funcs = { | 
|---|
| 50 | .get_modes = panel_bridge_connector_get_modes, | 
|---|
| 51 | }; | 
|---|
| 52 |  | 
|---|
| 53 | static const struct drm_connector_funcs panel_bridge_connector_funcs = { | 
|---|
| 54 | .reset = drm_atomic_helper_connector_reset, | 
|---|
| 55 | .fill_modes = drm_helper_probe_single_connector_modes, | 
|---|
| 56 | .destroy = drm_connector_cleanup, | 
|---|
| 57 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | 
|---|
| 58 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | 
|---|
| 59 | }; | 
|---|
| 60 |  | 
|---|
| 61 | static int panel_bridge_attach(struct drm_bridge *bridge, | 
|---|
| 62 | struct drm_encoder *encoder, | 
|---|
| 63 | enum drm_bridge_attach_flags flags) | 
|---|
| 64 | { | 
|---|
| 65 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 66 | struct drm_connector *connector = &panel_bridge->connector; | 
|---|
| 67 | int ret; | 
|---|
| 68 |  | 
|---|
| 69 | if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) | 
|---|
| 70 | return 0; | 
|---|
| 71 |  | 
|---|
| 72 | drm_connector_helper_add(connector, | 
|---|
| 73 | funcs: &panel_bridge_connector_helper_funcs); | 
|---|
| 74 |  | 
|---|
| 75 | ret = drm_connector_init(dev: bridge->dev, connector, | 
|---|
| 76 | funcs: &panel_bridge_connector_funcs, | 
|---|
| 77 | connector_type: panel_bridge->connector_type); | 
|---|
| 78 | if (ret) { | 
|---|
| 79 | DRM_ERROR( "Failed to initialize connector\n"); | 
|---|
| 80 | return ret; | 
|---|
| 81 | } | 
|---|
| 82 |  | 
|---|
| 83 | drm_panel_bridge_set_orientation(connector, bridge); | 
|---|
| 84 |  | 
|---|
| 85 | drm_connector_attach_encoder(connector: &panel_bridge->connector, | 
|---|
| 86 | encoder); | 
|---|
| 87 |  | 
|---|
| 88 | if (bridge->dev->registered) { | 
|---|
| 89 | if (connector->funcs->reset) | 
|---|
| 90 | connector->funcs->reset(connector); | 
|---|
| 91 | drm_connector_register(connector); | 
|---|
| 92 | } | 
|---|
| 93 |  | 
|---|
| 94 | return 0; | 
|---|
| 95 | } | 
|---|
| 96 |  | 
|---|
| 97 | static void panel_bridge_detach(struct drm_bridge *bridge) | 
|---|
| 98 | { | 
|---|
| 99 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 100 | struct drm_connector *connector = &panel_bridge->connector; | 
|---|
| 101 |  | 
|---|
| 102 | /* | 
|---|
| 103 | * Cleanup the connector if we know it was initialized. | 
|---|
| 104 | * | 
|---|
| 105 | * FIXME: This wouldn't be needed if the panel_bridge structure was | 
|---|
| 106 | * allocated with drmm_kzalloc(). This might be tricky since the | 
|---|
| 107 | * drm_device pointer can only be retrieved when the bridge is attached. | 
|---|
| 108 | */ | 
|---|
| 109 | if (connector->dev) | 
|---|
| 110 | drm_connector_cleanup(connector); | 
|---|
| 111 | } | 
|---|
| 112 |  | 
|---|
| 113 | static void panel_bridge_atomic_pre_enable(struct drm_bridge *bridge, | 
|---|
| 114 | struct drm_atomic_state *atomic_state) | 
|---|
| 115 | { | 
|---|
| 116 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 117 | struct drm_encoder *encoder = bridge->encoder; | 
|---|
| 118 | struct drm_crtc *crtc; | 
|---|
| 119 | struct drm_crtc_state *old_crtc_state; | 
|---|
| 120 |  | 
|---|
| 121 | crtc = drm_atomic_get_new_crtc_for_encoder(state: atomic_state, encoder); | 
|---|
| 122 | if (!crtc) | 
|---|
| 123 | return; | 
|---|
| 124 |  | 
|---|
| 125 | old_crtc_state = drm_atomic_get_old_crtc_state(state: atomic_state, crtc); | 
|---|
| 126 | if (old_crtc_state && old_crtc_state->self_refresh_active) | 
|---|
| 127 | return; | 
|---|
| 128 |  | 
|---|
| 129 | drm_panel_prepare(panel: panel_bridge->panel); | 
|---|
| 130 | } | 
|---|
| 131 |  | 
|---|
| 132 | static void panel_bridge_atomic_enable(struct drm_bridge *bridge, | 
|---|
| 133 | struct drm_atomic_state *atomic_state) | 
|---|
| 134 | { | 
|---|
| 135 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 136 | struct drm_encoder *encoder = bridge->encoder; | 
|---|
| 137 | struct drm_crtc *crtc; | 
|---|
| 138 | struct drm_crtc_state *old_crtc_state; | 
|---|
| 139 |  | 
|---|
| 140 | crtc = drm_atomic_get_new_crtc_for_encoder(state: atomic_state, encoder); | 
|---|
| 141 | if (!crtc) | 
|---|
| 142 | return; | 
|---|
| 143 |  | 
|---|
| 144 | old_crtc_state = drm_atomic_get_old_crtc_state(state: atomic_state, crtc); | 
|---|
| 145 | if (old_crtc_state && old_crtc_state->self_refresh_active) | 
|---|
| 146 | return; | 
|---|
| 147 |  | 
|---|
| 148 | drm_panel_enable(panel: panel_bridge->panel); | 
|---|
| 149 | } | 
|---|
| 150 |  | 
|---|
| 151 | static void panel_bridge_atomic_disable(struct drm_bridge *bridge, | 
|---|
| 152 | struct drm_atomic_state *atomic_state) | 
|---|
| 153 | { | 
|---|
| 154 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 155 | struct drm_encoder *encoder = bridge->encoder; | 
|---|
| 156 | struct drm_crtc *crtc; | 
|---|
| 157 | struct drm_crtc_state *new_crtc_state; | 
|---|
| 158 |  | 
|---|
| 159 | crtc = drm_atomic_get_old_crtc_for_encoder(state: atomic_state, encoder); | 
|---|
| 160 | if (!crtc) | 
|---|
| 161 | return; | 
|---|
| 162 |  | 
|---|
| 163 | new_crtc_state = drm_atomic_get_new_crtc_state(state: atomic_state, crtc); | 
|---|
| 164 | if (new_crtc_state && new_crtc_state->self_refresh_active) | 
|---|
| 165 | return; | 
|---|
| 166 |  | 
|---|
| 167 | drm_panel_disable(panel: panel_bridge->panel); | 
|---|
| 168 | } | 
|---|
| 169 |  | 
|---|
| 170 | static void panel_bridge_atomic_post_disable(struct drm_bridge *bridge, | 
|---|
| 171 | struct drm_atomic_state *atomic_state) | 
|---|
| 172 | { | 
|---|
| 173 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 174 | struct drm_encoder *encoder = bridge->encoder; | 
|---|
| 175 | struct drm_crtc *crtc; | 
|---|
| 176 | struct drm_crtc_state *new_crtc_state; | 
|---|
| 177 |  | 
|---|
| 178 | crtc = drm_atomic_get_old_crtc_for_encoder(state: atomic_state, encoder); | 
|---|
| 179 | if (!crtc) | 
|---|
| 180 | return; | 
|---|
| 181 |  | 
|---|
| 182 | new_crtc_state = drm_atomic_get_new_crtc_state(state: atomic_state, crtc); | 
|---|
| 183 | if (new_crtc_state && new_crtc_state->self_refresh_active) | 
|---|
| 184 | return; | 
|---|
| 185 |  | 
|---|
| 186 | drm_panel_unprepare(panel: panel_bridge->panel); | 
|---|
| 187 | } | 
|---|
| 188 |  | 
|---|
| 189 | static int panel_bridge_get_modes(struct drm_bridge *bridge, | 
|---|
| 190 | struct drm_connector *connector) | 
|---|
| 191 | { | 
|---|
| 192 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 193 |  | 
|---|
| 194 | return drm_panel_get_modes(panel: panel_bridge->panel, connector); | 
|---|
| 195 | } | 
|---|
| 196 |  | 
|---|
| 197 | static void panel_bridge_debugfs_init(struct drm_bridge *bridge, | 
|---|
| 198 | struct dentry *root) | 
|---|
| 199 | { | 
|---|
| 200 | struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 201 | struct drm_panel *panel = panel_bridge->panel; | 
|---|
| 202 |  | 
|---|
| 203 | root = debugfs_create_dir(name: "panel", parent: root); | 
|---|
| 204 | if (panel->funcs->debugfs_init) | 
|---|
| 205 | panel->funcs->debugfs_init(panel, root); | 
|---|
| 206 | } | 
|---|
| 207 |  | 
|---|
| 208 | static const struct drm_bridge_funcs panel_bridge_bridge_funcs = { | 
|---|
| 209 | .attach = panel_bridge_attach, | 
|---|
| 210 | .detach = panel_bridge_detach, | 
|---|
| 211 | .atomic_pre_enable = panel_bridge_atomic_pre_enable, | 
|---|
| 212 | .atomic_enable = panel_bridge_atomic_enable, | 
|---|
| 213 | .atomic_disable = panel_bridge_atomic_disable, | 
|---|
| 214 | .atomic_post_disable = panel_bridge_atomic_post_disable, | 
|---|
| 215 | .get_modes = panel_bridge_get_modes, | 
|---|
| 216 | .atomic_reset = drm_atomic_helper_bridge_reset, | 
|---|
| 217 | .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, | 
|---|
| 218 | .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, | 
|---|
| 219 | .atomic_get_input_bus_fmts = drm_atomic_helper_bridge_propagate_bus_fmt, | 
|---|
| 220 | .debugfs_init = panel_bridge_debugfs_init, | 
|---|
| 221 | }; | 
|---|
| 222 |  | 
|---|
| 223 | /** | 
|---|
| 224 | * drm_bridge_is_panel - Checks if a drm_bridge is a panel_bridge. | 
|---|
| 225 | * | 
|---|
| 226 | * @bridge: The drm_bridge to be checked. | 
|---|
| 227 | * | 
|---|
| 228 | * Returns true if the bridge is a panel bridge, or false otherwise. | 
|---|
| 229 | */ | 
|---|
| 230 | bool drm_bridge_is_panel(const struct drm_bridge *bridge) | 
|---|
| 231 | { | 
|---|
| 232 | return bridge->funcs == &panel_bridge_bridge_funcs; | 
|---|
| 233 | } | 
|---|
| 234 | EXPORT_SYMBOL(drm_bridge_is_panel); | 
|---|
| 235 |  | 
|---|
| 236 | /** | 
|---|
| 237 | * drm_panel_bridge_add - Creates a &drm_bridge and &drm_connector that | 
|---|
| 238 | * just calls the appropriate functions from &drm_panel. | 
|---|
| 239 | * | 
|---|
| 240 | * @panel: The drm_panel being wrapped.  Must be non-NULL. | 
|---|
| 241 | * | 
|---|
| 242 | * For drivers converting from directly using drm_panel: The expected | 
|---|
| 243 | * usage pattern is that during either encoder module probe or DSI | 
|---|
| 244 | * host attach, a drm_panel will be looked up through | 
|---|
| 245 | * drm_of_find_panel_or_bridge().  drm_panel_bridge_add() is used to | 
|---|
| 246 | * wrap that panel in the new bridge, and the result can then be | 
|---|
| 247 | * passed to drm_bridge_attach().  The drm_panel_prepare() and related | 
|---|
| 248 | * functions can be dropped from the encoder driver (they're now | 
|---|
| 249 | * called by the KMS helpers before calling into the encoder), along | 
|---|
| 250 | * with connector creation.  When done with the bridge (after | 
|---|
| 251 | * drm_mode_config_cleanup() if the bridge has already been attached), then | 
|---|
| 252 | * drm_panel_bridge_remove() to free it. | 
|---|
| 253 | * | 
|---|
| 254 | * The connector type is set to @panel->connector_type, which must be set to a | 
|---|
| 255 | * known type. Calling this function with a panel whose connector type is | 
|---|
| 256 | * DRM_MODE_CONNECTOR_Unknown will return ERR_PTR(-EINVAL). | 
|---|
| 257 | * | 
|---|
| 258 | * See devm_drm_panel_bridge_add() for an automatically managed version of this | 
|---|
| 259 | * function. | 
|---|
| 260 | */ | 
|---|
| 261 | struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel) | 
|---|
| 262 | { | 
|---|
| 263 | if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown)) | 
|---|
| 264 | return ERR_PTR(error: -EINVAL); | 
|---|
| 265 |  | 
|---|
| 266 | return drm_panel_bridge_add_typed(panel, connector_type: panel->connector_type); | 
|---|
| 267 | } | 
|---|
| 268 | EXPORT_SYMBOL(drm_panel_bridge_add); | 
|---|
| 269 |  | 
|---|
| 270 | /** | 
|---|
| 271 | * drm_panel_bridge_add_typed - Creates a &drm_bridge and &drm_connector with | 
|---|
| 272 | * an explicit connector type. | 
|---|
| 273 | * @panel: The drm_panel being wrapped.  Must be non-NULL. | 
|---|
| 274 | * @connector_type: The connector type (DRM_MODE_CONNECTOR_*) | 
|---|
| 275 | * | 
|---|
| 276 | * This is just like drm_panel_bridge_add(), but forces the connector type to | 
|---|
| 277 | * @connector_type instead of infering it from the panel. | 
|---|
| 278 | * | 
|---|
| 279 | * This function is deprecated and should not be used in new drivers. Use | 
|---|
| 280 | * drm_panel_bridge_add() instead, and fix panel drivers as necessary if they | 
|---|
| 281 | * don't report a connector type. | 
|---|
| 282 | */ | 
|---|
| 283 | struct drm_bridge *drm_panel_bridge_add_typed(struct drm_panel *panel, | 
|---|
| 284 | u32 connector_type) | 
|---|
| 285 | { | 
|---|
| 286 | struct panel_bridge *panel_bridge; | 
|---|
| 287 |  | 
|---|
| 288 | if (!panel) | 
|---|
| 289 | return ERR_PTR(error: -EINVAL); | 
|---|
| 290 |  | 
|---|
| 291 | panel_bridge = devm_drm_bridge_alloc(panel->dev, struct panel_bridge, bridge, | 
|---|
| 292 | &panel_bridge_bridge_funcs); | 
|---|
| 293 | if (IS_ERR(ptr: panel_bridge)) | 
|---|
| 294 | return (void *)panel_bridge; | 
|---|
| 295 |  | 
|---|
| 296 | panel_bridge->connector_type = connector_type; | 
|---|
| 297 | panel_bridge->panel = panel; | 
|---|
| 298 |  | 
|---|
| 299 | panel_bridge->bridge.of_node = panel->dev->of_node; | 
|---|
| 300 | panel_bridge->bridge.ops = DRM_BRIDGE_OP_MODES; | 
|---|
| 301 | panel_bridge->bridge.type = connector_type; | 
|---|
| 302 | panel_bridge->bridge.pre_enable_prev_first = panel->prepare_prev_first; | 
|---|
| 303 |  | 
|---|
| 304 | drm_bridge_add(bridge: &panel_bridge->bridge); | 
|---|
| 305 |  | 
|---|
| 306 | return &panel_bridge->bridge; | 
|---|
| 307 | } | 
|---|
| 308 | EXPORT_SYMBOL(drm_panel_bridge_add_typed); | 
|---|
| 309 |  | 
|---|
| 310 | /** | 
|---|
| 311 | * drm_panel_bridge_remove - Unregisters and frees a drm_bridge | 
|---|
| 312 | * created by drm_panel_bridge_add(). | 
|---|
| 313 | * | 
|---|
| 314 | * @bridge: The drm_bridge being freed. | 
|---|
| 315 | */ | 
|---|
| 316 | void drm_panel_bridge_remove(struct drm_bridge *bridge) | 
|---|
| 317 | { | 
|---|
| 318 | struct panel_bridge *panel_bridge; | 
|---|
| 319 |  | 
|---|
| 320 | if (!bridge) | 
|---|
| 321 | return; | 
|---|
| 322 |  | 
|---|
| 323 | if (!drm_bridge_is_panel(bridge)) { | 
|---|
| 324 | drm_warn(bridge->dev, "%s: called on non-panel bridge!\n", __func__); | 
|---|
| 325 | return; | 
|---|
| 326 | } | 
|---|
| 327 |  | 
|---|
| 328 | panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 329 |  | 
|---|
| 330 | drm_bridge_remove(bridge); | 
|---|
| 331 | /* TODO remove this after reworking panel_bridge lifetime */ | 
|---|
| 332 | devm_drm_put_bridge(dev: panel_bridge->panel->dev, bridge); | 
|---|
| 333 | } | 
|---|
| 334 | EXPORT_SYMBOL(drm_panel_bridge_remove); | 
|---|
| 335 |  | 
|---|
| 336 | /** | 
|---|
| 337 | * drm_panel_bridge_set_orientation - Set the connector's panel orientation | 
|---|
| 338 | * from the bridge that can be transformed to panel bridge. | 
|---|
| 339 | * | 
|---|
| 340 | * @connector: The connector to be set panel orientation. | 
|---|
| 341 | * @bridge: The drm_bridge to be transformed to panel bridge. | 
|---|
| 342 | * | 
|---|
| 343 | * Returns 0 on success, negative errno on failure. | 
|---|
| 344 | */ | 
|---|
| 345 | int drm_panel_bridge_set_orientation(struct drm_connector *connector, | 
|---|
| 346 | struct drm_bridge *bridge) | 
|---|
| 347 | { | 
|---|
| 348 | struct panel_bridge *panel_bridge; | 
|---|
| 349 |  | 
|---|
| 350 | panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 351 |  | 
|---|
| 352 | return drm_connector_set_orientation_from_panel(connector, | 
|---|
| 353 | panel: panel_bridge->panel); | 
|---|
| 354 | } | 
|---|
| 355 | EXPORT_SYMBOL(drm_panel_bridge_set_orientation); | 
|---|
| 356 |  | 
|---|
| 357 | static void devm_drm_panel_bridge_release(struct device *dev, void *res) | 
|---|
| 358 | { | 
|---|
| 359 | struct drm_bridge *bridge = *(struct drm_bridge **)res; | 
|---|
| 360 |  | 
|---|
| 361 | if (!bridge) | 
|---|
| 362 | return; | 
|---|
| 363 |  | 
|---|
| 364 | drm_bridge_remove(bridge); | 
|---|
| 365 | } | 
|---|
| 366 |  | 
|---|
| 367 | /** | 
|---|
| 368 | * devm_drm_panel_bridge_add - Creates a managed &drm_bridge and &drm_connector | 
|---|
| 369 | * that just calls the appropriate functions from &drm_panel. | 
|---|
| 370 | * @dev: device to tie the bridge lifetime to | 
|---|
| 371 | * @panel: The drm_panel being wrapped.  Must be non-NULL. | 
|---|
| 372 | * | 
|---|
| 373 | * This is the managed version of drm_panel_bridge_add() which automatically | 
|---|
| 374 | * calls drm_panel_bridge_remove() when @dev is unbound. | 
|---|
| 375 | */ | 
|---|
| 376 | struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev, | 
|---|
| 377 | struct drm_panel *panel) | 
|---|
| 378 | { | 
|---|
| 379 | if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown)) | 
|---|
| 380 | return ERR_PTR(error: -EINVAL); | 
|---|
| 381 |  | 
|---|
| 382 | return devm_drm_panel_bridge_add_typed(dev, panel, | 
|---|
| 383 | connector_type: panel->connector_type); | 
|---|
| 384 | } | 
|---|
| 385 | EXPORT_SYMBOL(devm_drm_panel_bridge_add); | 
|---|
| 386 |  | 
|---|
| 387 | /** | 
|---|
| 388 | * devm_drm_panel_bridge_add_typed - Creates a managed &drm_bridge and | 
|---|
| 389 | * &drm_connector with an explicit connector type. | 
|---|
| 390 | * @dev: device to tie the bridge lifetime to | 
|---|
| 391 | * @panel: The drm_panel being wrapped.  Must be non-NULL. | 
|---|
| 392 | * @connector_type: The connector type (DRM_MODE_CONNECTOR_*) | 
|---|
| 393 | * | 
|---|
| 394 | * This is just like devm_drm_panel_bridge_add(), but forces the connector type | 
|---|
| 395 | * to @connector_type instead of infering it from the panel. | 
|---|
| 396 | * | 
|---|
| 397 | * This function is deprecated and should not be used in new drivers. Use | 
|---|
| 398 | * devm_drm_panel_bridge_add() instead, and fix panel drivers as necessary if | 
|---|
| 399 | * they don't report a connector type. | 
|---|
| 400 | */ | 
|---|
| 401 | struct drm_bridge *devm_drm_panel_bridge_add_typed(struct device *dev, | 
|---|
| 402 | struct drm_panel *panel, | 
|---|
| 403 | u32 connector_type) | 
|---|
| 404 | { | 
|---|
| 405 | struct drm_bridge **ptr, *bridge; | 
|---|
| 406 |  | 
|---|
| 407 | ptr = devres_alloc(devm_drm_panel_bridge_release, sizeof(*ptr), | 
|---|
| 408 | GFP_KERNEL); | 
|---|
| 409 | if (!ptr) | 
|---|
| 410 | return ERR_PTR(error: -ENOMEM); | 
|---|
| 411 |  | 
|---|
| 412 | bridge = drm_panel_bridge_add_typed(panel, connector_type); | 
|---|
| 413 | if (IS_ERR(ptr: bridge)) { | 
|---|
| 414 | devres_free(res: ptr); | 
|---|
| 415 | return bridge; | 
|---|
| 416 | } | 
|---|
| 417 |  | 
|---|
| 418 | *ptr = bridge; | 
|---|
| 419 | devres_add(dev, res: ptr); | 
|---|
| 420 |  | 
|---|
| 421 | return bridge; | 
|---|
| 422 | } | 
|---|
| 423 | EXPORT_SYMBOL(devm_drm_panel_bridge_add_typed); | 
|---|
| 424 |  | 
|---|
| 425 | static void drmm_drm_panel_bridge_release(struct drm_device *drm, void *ptr) | 
|---|
| 426 | { | 
|---|
| 427 | struct drm_bridge *bridge = ptr; | 
|---|
| 428 |  | 
|---|
| 429 | drm_panel_bridge_remove(bridge); | 
|---|
| 430 | } | 
|---|
| 431 |  | 
|---|
| 432 | /** | 
|---|
| 433 | * drmm_panel_bridge_add - Creates a DRM-managed &drm_bridge and | 
|---|
| 434 | *                         &drm_connector that just calls the | 
|---|
| 435 | *                         appropriate functions from &drm_panel. | 
|---|
| 436 | * | 
|---|
| 437 | * @drm: DRM device to tie the bridge lifetime to | 
|---|
| 438 | * @panel: The drm_panel being wrapped.  Must be non-NULL. | 
|---|
| 439 | * | 
|---|
| 440 | * This is the DRM-managed version of drm_panel_bridge_add() which | 
|---|
| 441 | * automatically calls drm_panel_bridge_remove() when @dev is cleaned | 
|---|
| 442 | * up. | 
|---|
| 443 | */ | 
|---|
| 444 | struct drm_bridge *drmm_panel_bridge_add(struct drm_device *drm, | 
|---|
| 445 | struct drm_panel *panel) | 
|---|
| 446 | { | 
|---|
| 447 | struct drm_bridge *bridge; | 
|---|
| 448 | int ret; | 
|---|
| 449 |  | 
|---|
| 450 | bridge = drm_panel_bridge_add_typed(panel, panel->connector_type); | 
|---|
| 451 | if (IS_ERR(ptr: bridge)) | 
|---|
| 452 | return bridge; | 
|---|
| 453 |  | 
|---|
| 454 | ret = drmm_add_action_or_reset(drm, drmm_drm_panel_bridge_release, | 
|---|
| 455 | bridge); | 
|---|
| 456 | if (ret) | 
|---|
| 457 | return ERR_PTR(error: ret); | 
|---|
| 458 |  | 
|---|
| 459 | return bridge; | 
|---|
| 460 | } | 
|---|
| 461 | EXPORT_SYMBOL(drmm_panel_bridge_add); | 
|---|
| 462 |  | 
|---|
| 463 | /** | 
|---|
| 464 | * drm_panel_bridge_connector - return the connector for the panel bridge | 
|---|
| 465 | * @bridge: The drm_bridge. | 
|---|
| 466 | * | 
|---|
| 467 | * drm_panel_bridge creates the connector. | 
|---|
| 468 | * This function gives external access to the connector. | 
|---|
| 469 | * | 
|---|
| 470 | * Returns: Pointer to drm_connector | 
|---|
| 471 | */ | 
|---|
| 472 | struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge) | 
|---|
| 473 | { | 
|---|
| 474 | struct panel_bridge *panel_bridge; | 
|---|
| 475 |  | 
|---|
| 476 | panel_bridge = drm_bridge_to_panel_bridge(bridge); | 
|---|
| 477 |  | 
|---|
| 478 | return &panel_bridge->connector; | 
|---|
| 479 | } | 
|---|
| 480 | EXPORT_SYMBOL(drm_panel_bridge_connector); | 
|---|
| 481 |  | 
|---|
| 482 | #ifdef CONFIG_OF | 
|---|
| 483 | /** | 
|---|
| 484 | * devm_drm_of_get_bridge - Return next bridge in the chain | 
|---|
| 485 | * @dev: device to tie the bridge lifetime to | 
|---|
| 486 | * @np: device tree node containing encoder output ports | 
|---|
| 487 | * @port: port in the device tree node | 
|---|
| 488 | * @endpoint: endpoint in the device tree node | 
|---|
| 489 | * | 
|---|
| 490 | * Given a DT node's port and endpoint number, finds the connected node | 
|---|
| 491 | * and returns the associated bridge if any, or creates and returns a | 
|---|
| 492 | * drm panel bridge instance if a panel is connected. | 
|---|
| 493 | * | 
|---|
| 494 | * Returns a pointer to the bridge if successful, or an error pointer | 
|---|
| 495 | * otherwise. | 
|---|
| 496 | */ | 
|---|
| 497 | struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, | 
|---|
| 498 | struct device_node *np, | 
|---|
| 499 | u32 port, u32 endpoint) | 
|---|
| 500 | { | 
|---|
| 501 | struct drm_bridge *bridge; | 
|---|
| 502 | struct drm_panel *panel; | 
|---|
| 503 | int ret; | 
|---|
| 504 |  | 
|---|
| 505 | ret = drm_of_find_panel_or_bridge(np, port, endpoint, | 
|---|
| 506 | &panel, &bridge); | 
|---|
| 507 | if (ret) | 
|---|
| 508 | return ERR_PTR(ret); | 
|---|
| 509 |  | 
|---|
| 510 | if (panel) | 
|---|
| 511 | bridge = devm_drm_panel_bridge_add(dev, panel); | 
|---|
| 512 |  | 
|---|
| 513 | return bridge; | 
|---|
| 514 | } | 
|---|
| 515 | EXPORT_SYMBOL(devm_drm_of_get_bridge); | 
|---|
| 516 |  | 
|---|
| 517 | /** | 
|---|
| 518 | * drmm_of_get_bridge - Return next bridge in the chain | 
|---|
| 519 | * @drm: device to tie the bridge lifetime to | 
|---|
| 520 | * @np: device tree node containing encoder output ports | 
|---|
| 521 | * @port: port in the device tree node | 
|---|
| 522 | * @endpoint: endpoint in the device tree node | 
|---|
| 523 | * | 
|---|
| 524 | * Given a DT node's port and endpoint number, finds the connected node | 
|---|
| 525 | * and returns the associated bridge if any, or creates and returns a | 
|---|
| 526 | * drm panel bridge instance if a panel is connected. | 
|---|
| 527 | * | 
|---|
| 528 | * Returns a drmm managed pointer to the bridge if successful, or an error | 
|---|
| 529 | * pointer otherwise. | 
|---|
| 530 | */ | 
|---|
| 531 | struct drm_bridge *drmm_of_get_bridge(struct drm_device *drm, | 
|---|
| 532 | struct device_node *np, | 
|---|
| 533 | u32 port, u32 endpoint) | 
|---|
| 534 | { | 
|---|
| 535 | struct drm_bridge *bridge; | 
|---|
| 536 | struct drm_panel *panel; | 
|---|
| 537 | int ret; | 
|---|
| 538 |  | 
|---|
| 539 | ret = drm_of_find_panel_or_bridge(np, port, endpoint, | 
|---|
| 540 | &panel, &bridge); | 
|---|
| 541 | if (ret) | 
|---|
| 542 | return ERR_PTR(ret); | 
|---|
| 543 |  | 
|---|
| 544 | if (panel) | 
|---|
| 545 | bridge = drmm_panel_bridge_add(drm, panel); | 
|---|
| 546 |  | 
|---|
| 547 | return bridge; | 
|---|
| 548 | } | 
|---|
| 549 | EXPORT_SYMBOL(drmm_of_get_bridge); | 
|---|
| 550 |  | 
|---|
| 551 | #endif | 
|---|
| 552 |  | 
|---|