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SubjectRe: [PATCH 22/24] drm/bridge: remove the .of_node member
Hi Peter,

I love your patch! Yet something to improve:

[auto build test ERROR on v4.17-rc2]
[also build test ERROR on next-20180426]
[cannot apply to drm/drm-next robclark/msm-next drm-exynos/exynos-drm/for-next]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Peter-Rosin/device-link-bridge-supplier-drm-device/20180428-135229
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm

All errors (new ones prefixed by >>):

drivers/gpu//drm/rockchip/rockchip_lvds.c: In function 'rockchip_lvds_bind':
>> drivers/gpu//drm/rockchip/rockchip_lvds.c:381:24: error: 'struct drm_bridge' has no member named 'of_node'
remote = lvds->bridge->of_node;
^~

vim +381 drivers/gpu//drm/rockchip/rockchip_lvds.c

34cc0aa25 Sandy Huang 2017-09-02 340
34cc0aa25 Sandy Huang 2017-09-02 341 static int rockchip_lvds_bind(struct device *dev, struct device *master,
34cc0aa25 Sandy Huang 2017-09-02 342 void *data)
34cc0aa25 Sandy Huang 2017-09-02 343 {
34cc0aa25 Sandy Huang 2017-09-02 344 struct rockchip_lvds *lvds = dev_get_drvdata(dev);
34cc0aa25 Sandy Huang 2017-09-02 345 struct drm_device *drm_dev = data;
34cc0aa25 Sandy Huang 2017-09-02 346 struct drm_encoder *encoder;
34cc0aa25 Sandy Huang 2017-09-02 347 struct drm_connector *connector;
34cc0aa25 Sandy Huang 2017-09-02 348 struct device_node *remote = NULL;
34cc0aa25 Sandy Huang 2017-09-02 349 struct device_node *port, *endpoint;
6bf2e0324 Sean Paul 2017-09-20 350 int ret = 0, child_count = 0;
34cc0aa25 Sandy Huang 2017-09-02 351 const char *name;
34cc0aa25 Sandy Huang 2017-09-02 352 u32 endpoint_id;
34cc0aa25 Sandy Huang 2017-09-02 353
34cc0aa25 Sandy Huang 2017-09-02 354 lvds->drm_dev = drm_dev;
34cc0aa25 Sandy Huang 2017-09-02 355 port = of_graph_get_port_by_id(dev->of_node, 1);
34cc0aa25 Sandy Huang 2017-09-02 356 if (!port) {
34cc0aa25 Sandy Huang 2017-09-02 357 DRM_DEV_ERROR(dev,
34cc0aa25 Sandy Huang 2017-09-02 358 "can't found port point, please init lvds panel port!\n");
34cc0aa25 Sandy Huang 2017-09-02 359 return -EINVAL;
34cc0aa25 Sandy Huang 2017-09-02 360 }
34cc0aa25 Sandy Huang 2017-09-02 361 for_each_child_of_node(port, endpoint) {
6bf2e0324 Sean Paul 2017-09-20 362 child_count++;
34cc0aa25 Sandy Huang 2017-09-02 363 of_property_read_u32(endpoint, "reg", &endpoint_id);
34cc0aa25 Sandy Huang 2017-09-02 364 ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
34cc0aa25 Sandy Huang 2017-09-02 365 &lvds->panel, &lvds->bridge);
34cc0aa25 Sandy Huang 2017-09-02 366 if (!ret)
34cc0aa25 Sandy Huang 2017-09-02 367 break;
34cc0aa25 Sandy Huang 2017-09-02 368 }
6bf2e0324 Sean Paul 2017-09-20 369 if (!child_count) {
6bf2e0324 Sean Paul 2017-09-20 370 DRM_DEV_ERROR(dev, "lvds port does not have any children\n");
6bf2e0324 Sean Paul 2017-09-20 371 ret = -EINVAL;
6bf2e0324 Sean Paul 2017-09-20 372 goto err_put_port;
6bf2e0324 Sean Paul 2017-09-20 373 } else if (ret) {
34cc0aa25 Sandy Huang 2017-09-02 374 DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n");
34cc0aa25 Sandy Huang 2017-09-02 375 ret = -EPROBE_DEFER;
34cc0aa25 Sandy Huang 2017-09-02 376 goto err_put_port;
34cc0aa25 Sandy Huang 2017-09-02 377 }
34cc0aa25 Sandy Huang 2017-09-02 378 if (lvds->panel)
34cc0aa25 Sandy Huang 2017-09-02 379 remote = lvds->panel->dev->of_node;
34cc0aa25 Sandy Huang 2017-09-02 380 else
34cc0aa25 Sandy Huang 2017-09-02 @381 remote = lvds->bridge->of_node;
34cc0aa25 Sandy Huang 2017-09-02 382 if (of_property_read_string(dev->of_node, "rockchip,output", &name))
34cc0aa25 Sandy Huang 2017-09-02 383 /* default set it as output rgb */
34cc0aa25 Sandy Huang 2017-09-02 384 lvds->output = DISPLAY_OUTPUT_RGB;
34cc0aa25 Sandy Huang 2017-09-02 385 else
34cc0aa25 Sandy Huang 2017-09-02 386 lvds->output = lvds_name_to_output(name);
34cc0aa25 Sandy Huang 2017-09-02 387
34cc0aa25 Sandy Huang 2017-09-02 388 if (lvds->output < 0) {
34cc0aa25 Sandy Huang 2017-09-02 389 DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
34cc0aa25 Sandy Huang 2017-09-02 390 ret = lvds->output;
34cc0aa25 Sandy Huang 2017-09-02 391 goto err_put_remote;
34cc0aa25 Sandy Huang 2017-09-02 392 }
34cc0aa25 Sandy Huang 2017-09-02 393
34cc0aa25 Sandy Huang 2017-09-02 394 if (of_property_read_string(remote, "data-mapping", &name))
34cc0aa25 Sandy Huang 2017-09-02 395 /* default set it as format vesa 18 */
34cc0aa25 Sandy Huang 2017-09-02 396 lvds->format = LVDS_VESA_18;
34cc0aa25 Sandy Huang 2017-09-02 397 else
34cc0aa25 Sandy Huang 2017-09-02 398 lvds->format = lvds_name_to_format(name);
34cc0aa25 Sandy Huang 2017-09-02 399
34cc0aa25 Sandy Huang 2017-09-02 400 if (lvds->format < 0) {
34cc0aa25 Sandy Huang 2017-09-02 401 DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
34cc0aa25 Sandy Huang 2017-09-02 402 ret = lvds->format;
34cc0aa25 Sandy Huang 2017-09-02 403 goto err_put_remote;
34cc0aa25 Sandy Huang 2017-09-02 404 }
34cc0aa25 Sandy Huang 2017-09-02 405
34cc0aa25 Sandy Huang 2017-09-02 406 encoder = &lvds->encoder;
34cc0aa25 Sandy Huang 2017-09-02 407 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
34cc0aa25 Sandy Huang 2017-09-02 408 dev->of_node);
34cc0aa25 Sandy Huang 2017-09-02 409
34cc0aa25 Sandy Huang 2017-09-02 410 ret = drm_encoder_init(drm_dev, encoder, &rockchip_lvds_encoder_funcs,
34cc0aa25 Sandy Huang 2017-09-02 411 DRM_MODE_ENCODER_LVDS, NULL);
34cc0aa25 Sandy Huang 2017-09-02 412 if (ret < 0) {
34cc0aa25 Sandy Huang 2017-09-02 413 DRM_DEV_ERROR(drm_dev->dev,
34cc0aa25 Sandy Huang 2017-09-02 414 "failed to initialize encoder: %d\n", ret);
34cc0aa25 Sandy Huang 2017-09-02 415 goto err_put_remote;
34cc0aa25 Sandy Huang 2017-09-02 416 }
34cc0aa25 Sandy Huang 2017-09-02 417
34cc0aa25 Sandy Huang 2017-09-02 418 drm_encoder_helper_add(encoder, &rockchip_lvds_encoder_helper_funcs);
34cc0aa25 Sandy Huang 2017-09-02 419
34cc0aa25 Sandy Huang 2017-09-02 420 if (lvds->panel) {
34cc0aa25 Sandy Huang 2017-09-02 421 connector = &lvds->connector;
34cc0aa25 Sandy Huang 2017-09-02 422 connector->dpms = DRM_MODE_DPMS_OFF;
34cc0aa25 Sandy Huang 2017-09-02 423 ret = drm_connector_init(drm_dev, connector,
34cc0aa25 Sandy Huang 2017-09-02 424 &rockchip_lvds_connector_funcs,
34cc0aa25 Sandy Huang 2017-09-02 425 DRM_MODE_CONNECTOR_LVDS);
34cc0aa25 Sandy Huang 2017-09-02 426 if (ret < 0) {
34cc0aa25 Sandy Huang 2017-09-02 427 DRM_DEV_ERROR(drm_dev->dev,
34cc0aa25 Sandy Huang 2017-09-02 428 "failed to initialize connector: %d\n", ret);
34cc0aa25 Sandy Huang 2017-09-02 429 goto err_free_encoder;
34cc0aa25 Sandy Huang 2017-09-02 430 }
34cc0aa25 Sandy Huang 2017-09-02 431
34cc0aa25 Sandy Huang 2017-09-02 432 drm_connector_helper_add(connector,
34cc0aa25 Sandy Huang 2017-09-02 433 &rockchip_lvds_connector_helper_funcs);
34cc0aa25 Sandy Huang 2017-09-02 434
34cc0aa25 Sandy Huang 2017-09-02 435 ret = drm_mode_connector_attach_encoder(connector, encoder);
34cc0aa25 Sandy Huang 2017-09-02 436 if (ret < 0) {
34cc0aa25 Sandy Huang 2017-09-02 437 DRM_DEV_ERROR(drm_dev->dev,
34cc0aa25 Sandy Huang 2017-09-02 438 "failed to attach encoder: %d\n", ret);
34cc0aa25 Sandy Huang 2017-09-02 439 goto err_free_connector;
34cc0aa25 Sandy Huang 2017-09-02 440 }
34cc0aa25 Sandy Huang 2017-09-02 441
34cc0aa25 Sandy Huang 2017-09-02 442 ret = drm_panel_attach(lvds->panel, connector);
34cc0aa25 Sandy Huang 2017-09-02 443 if (ret < 0) {
34cc0aa25 Sandy Huang 2017-09-02 444 DRM_DEV_ERROR(drm_dev->dev,
34cc0aa25 Sandy Huang 2017-09-02 445 "failed to attach panel: %d\n", ret);
34cc0aa25 Sandy Huang 2017-09-02 446 goto err_free_connector;
34cc0aa25 Sandy Huang 2017-09-02 447 }
34cc0aa25 Sandy Huang 2017-09-02 448 } else {
34cc0aa25 Sandy Huang 2017-09-02 449 lvds->bridge->encoder = encoder;
34cc0aa25 Sandy Huang 2017-09-02 450 ret = drm_bridge_attach(encoder, lvds->bridge, NULL);
34cc0aa25 Sandy Huang 2017-09-02 451 if (ret) {
34cc0aa25 Sandy Huang 2017-09-02 452 DRM_DEV_ERROR(drm_dev->dev,
34cc0aa25 Sandy Huang 2017-09-02 453 "failed to attach bridge: %d\n", ret);
34cc0aa25 Sandy Huang 2017-09-02 454 goto err_free_encoder;
34cc0aa25 Sandy Huang 2017-09-02 455 }
34cc0aa25 Sandy Huang 2017-09-02 456 encoder->bridge = lvds->bridge;
34cc0aa25 Sandy Huang 2017-09-02 457 }
34cc0aa25 Sandy Huang 2017-09-02 458
34cc0aa25 Sandy Huang 2017-09-02 459 pm_runtime_enable(dev);
34cc0aa25 Sandy Huang 2017-09-02 460 of_node_put(remote);
34cc0aa25 Sandy Huang 2017-09-02 461 of_node_put(port);
34cc0aa25 Sandy Huang 2017-09-02 462
34cc0aa25 Sandy Huang 2017-09-02 463 return 0;
34cc0aa25 Sandy Huang 2017-09-02 464
34cc0aa25 Sandy Huang 2017-09-02 465 err_free_connector:
34cc0aa25 Sandy Huang 2017-09-02 466 drm_connector_cleanup(connector);
34cc0aa25 Sandy Huang 2017-09-02 467 err_free_encoder:
34cc0aa25 Sandy Huang 2017-09-02 468 drm_encoder_cleanup(encoder);
34cc0aa25 Sandy Huang 2017-09-02 469 err_put_remote:
34cc0aa25 Sandy Huang 2017-09-02 470 of_node_put(remote);
34cc0aa25 Sandy Huang 2017-09-02 471 err_put_port:
34cc0aa25 Sandy Huang 2017-09-02 472 of_node_put(port);
34cc0aa25 Sandy Huang 2017-09-02 473
34cc0aa25 Sandy Huang 2017-09-02 474 return ret;
34cc0aa25 Sandy Huang 2017-09-02 475 }
34cc0aa25 Sandy Huang 2017-09-02 476

:::::: The code at line 381 was first introduced by commit
:::::: 34cc0aa2545603560c79aaea3340d8ff3a71bd10 drm/rockchip: Add support for Rockchip Soc LVDS

:::::: TO: Sandy Huang <hjc@rock-chips.com>
:::::: CC: Mark Yao <mark.yao@rock-chips.com>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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