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SubjectRe: drivers/gpu/drm/bridge/sil-sii8620.c:2229: undefined reference to `extcon_find_edev_by_node'
From
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On 05/05/2018 04:22 PM, kbuild test robot wrote:
> Hi Maciej,
>
> FYI, the error/warning still remains.

Hi M. Robot,

I am cc-ing dri-devel@lists.freedesktop.org so that they are aware of the
multiple times that you have posted this kbuild error (I have 3 different
posts in my Inbox with the same errors; I may have missed some).

I hope that someone there will have some insights into this problem.

I have looked at the issues and concluded that the correct fix for this IMO is:

config DRM_SIL_SII8620
...
depends on EXTCON || !EXTCON

However, that causes some unhappy errors from scripts/kconfig/ concerning
Kconfig recursive dependencies detected. Alternatively, using
select EXTCON
does not cause any kconfig recursive dependency issues and solves the build
errors.


thanks!

> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: c1c07416cdd47161a359286021d483f449ad8c4f
> commit: 688838442147d9dd94c2ef7c2c31a35cf150c5fa drm/bridge/sii8620: use micro-USB cable detection logic to detect MHL
> date: 8 weeks ago
> config: i386-randconfig-c0-05060527 (attached as .config)
> compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
> reproduce:
> git checkout 688838442147d9dd94c2ef7c2c31a35cf150c5fa
> # save the attached .config to linux build tree
> make ARCH=i386
>
> All errors (new ones prefixed by >>):
>
> drivers/gpu/drm/bridge/sil-sii8620.o: In function `sii8620_remove':
> drivers/gpu/drm/bridge/sil-sii8620.c:2405: undefined reference to `extcon_unregister_notifier'
> drivers/gpu/drm/bridge/sil-sii8620.o: In function `sii8620_extcon_init':
>>> drivers/gpu/drm/bridge/sil-sii8620.c:2229: undefined reference to `extcon_find_edev_by_node'
>>> drivers/gpu/drm/bridge/sil-sii8620.c:2241: undefined reference to `extcon_register_notifier'
> drivers/gpu/drm/bridge/sil-sii8620.o: In function `sii8620_extcon_work':
> drivers/gpu/drm/bridge/sil-sii8620.c:2189: undefined reference to `extcon_get_state'
>
> vim +2229 drivers/gpu/drm/bridge/sil-sii8620.c
>
> 2212
> 2213 static int sii8620_extcon_init(struct sii8620 *ctx)
> 2214 {
> 2215 struct extcon_dev *edev;
> 2216 struct device_node *musb, *muic;
> 2217 int ret;
> 2218
> 2219 /* get micro-USB connector node */
> 2220 musb = of_graph_get_remote_node(ctx->dev->of_node, 1, -1);
> 2221 /* next get micro-USB Interface Controller node */
> 2222 muic = of_get_next_parent(musb);
> 2223
> 2224 if (!muic) {
> 2225 dev_info(ctx->dev, "no extcon found, switching to 'always on' mode\n");
> 2226 return 0;
> 2227 }
> 2228
>> 2229 edev = extcon_find_edev_by_node(muic);
> 2230 of_node_put(muic);
> 2231 if (IS_ERR(edev)) {
> 2232 if (PTR_ERR(edev) == -EPROBE_DEFER)
> 2233 return -EPROBE_DEFER;
> 2234 dev_err(ctx->dev, "Invalid or missing extcon\n");
> 2235 return PTR_ERR(edev);
> 2236 }
> 2237
> 2238 ctx->extcon = edev;
> 2239 ctx->extcon_nb.notifier_call = sii8620_extcon_notifier;
> 2240 INIT_WORK(&ctx->extcon_wq, sii8620_extcon_work);
>> 2241 ret = extcon_register_notifier(edev, EXTCON_DISP_MHL, &ctx->extcon_nb);
> 2242 if (ret) {
> 2243 dev_err(ctx->dev, "failed to register notifier for MHL\n");
> 2244 return ret;
> 2245 }
> 2246
> 2247 return 0;
> 2248 }
> 2249
> 2250 static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge)
> 2251 {
> 2252 return container_of(bridge, struct sii8620, bridge);
> 2253 }
> 2254
> 2255 static int sii8620_attach(struct drm_bridge *bridge)
> 2256 {
> 2257 struct sii8620 *ctx = bridge_to_sii8620(bridge);
> 2258
> 2259 sii8620_init_rcp_input_dev(ctx);
> 2260
> 2261 return sii8620_clear_error(ctx);
> 2262 }
> 2263
> 2264 static void sii8620_detach(struct drm_bridge *bridge)
> 2265 {
> 2266 struct sii8620 *ctx = bridge_to_sii8620(bridge);
> 2267
> 2268 rc_unregister_device(ctx->rc_dev);
> 2269 }
> 2270
> 2271 static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge,
> 2272 const struct drm_display_mode *mode)
> 2273 {
> 2274 struct sii8620 *ctx = bridge_to_sii8620(bridge);
> 2275 bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] &
> 2276 MHL_DCAP_VID_LINK_PPIXEL;
> 2277 unsigned int max_pclk = sii8620_is_mhl3(ctx) ? MHL3_MAX_LCLK :
> 2278 MHL1_MAX_LCLK;
> 2279 max_pclk /= can_pack ? 2 : 3;
> 2280
> 2281 return (mode->clock > max_pclk) ? MODE_CLOCK_HIGH : MODE_OK;
> 2282 }
> 2283
> 2284 static bool sii8620_mode_fixup(struct drm_bridge *bridge,
> 2285 const struct drm_display_mode *mode,
> 2286 struct drm_display_mode *adjusted_mode)
> 2287 {
> 2288 struct sii8620 *ctx = bridge_to_sii8620(bridge);
> 2289 int max_lclk;
> 2290 bool ret = true;
> 2291
> 2292 mutex_lock(&ctx->lock);
> 2293
> 2294 max_lclk = sii8620_is_mhl3(ctx) ? MHL3_MAX_LCLK : MHL1_MAX_LCLK;
> 2295 if (max_lclk > 3 * adjusted_mode->clock) {
> 2296 ctx->use_packed_pixel = 0;
> 2297 goto end;
> 2298 }
> 2299 if ((ctx->devcap[MHL_DCAP_VID_LINK_MODE] & MHL_DCAP_VID_LINK_PPIXEL) &&
> 2300 max_lclk > 2 * adjusted_mode->clock) {
> 2301 ctx->use_packed_pixel = 1;
> 2302 goto end;
> 2303 }
> 2304 ret = false;
> 2305 end:
> 2306 if (ret) {
> 2307 u8 vic = drm_match_cea_mode(adjusted_mode);
> 2308
> 2309 if (!vic) {
> 2310 union hdmi_infoframe frm;
> 2311 u8 mhl_vic[] = { 0, 95, 94, 93, 98 };
> 2312
> 2313 /* FIXME: We need the connector here */
> 2314 drm_hdmi_vendor_infoframe_from_display_mode(
> 2315 &frm.vendor.hdmi, NULL, adjusted_mode);
> 2316 vic = frm.vendor.hdmi.vic;
> 2317 if (vic >= ARRAY_SIZE(mhl_vic))
> 2318 vic = 0;
> 2319 vic = mhl_vic[vic];
> 2320 }
> 2321 ctx->video_code = vic;
> 2322 ctx->pixel_clock = adjusted_mode->clock;
> 2323 }
> 2324 mutex_unlock(&ctx->lock);
> 2325 return ret;
> 2326 }
> 2327
> 2328 static const struct drm_bridge_funcs sii8620_bridge_funcs = {
> 2329 .attach = sii8620_attach,
> 2330 .detach = sii8620_detach,
> 2331 .mode_fixup = sii8620_mode_fixup,
> 2332 .mode_valid = sii8620_mode_valid,
> 2333 };
> 2334
> 2335 static int sii8620_probe(struct i2c_client *client,
> 2336 const struct i2c_device_id *id)
> 2337 {
> 2338 struct device *dev = &client->dev;
> 2339 struct sii8620 *ctx;
> 2340 int ret;
> 2341
> 2342 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> 2343 if (!ctx)
> 2344 return -ENOMEM;
> 2345
> 2346 ctx->dev = dev;
> 2347 mutex_init(&ctx->lock);
> 2348 INIT_LIST_HEAD(&ctx->mt_queue);
> 2349
> 2350 ctx->clk_xtal = devm_clk_get(dev, "xtal");
> 2351 if (IS_ERR(ctx->clk_xtal)) {
> 2352 dev_err(dev, "failed to get xtal clock from DT\n");
> 2353 return PTR_ERR(ctx->clk_xtal);
> 2354 }
> 2355
> 2356 if (!client->irq) {
> 2357 dev_err(dev, "no irq provided\n");
> 2358 return -EINVAL;
> 2359 }
> 2360 irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
> 2361 ret = devm_request_threaded_irq(dev, client->irq, NULL,
> 2362 sii8620_irq_thread,
> 2363 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
> 2364 "sii8620", ctx);
> 2365 if (ret < 0) {
> 2366 dev_err(dev, "failed to install IRQ handler\n");
> 2367 return ret;
> 2368 }
> 2369
> 2370 ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
> 2371 if (IS_ERR(ctx->gpio_reset)) {
> 2372 dev_err(dev, "failed to get reset gpio from DT\n");
> 2373 return PTR_ERR(ctx->gpio_reset);
> 2374 }
> 2375
> 2376 ctx->supplies[0].supply = "cvcc10";
> 2377 ctx->supplies[1].supply = "iovcc18";
> 2378 ret = devm_regulator_bulk_get(dev, 2, ctx->supplies);
> 2379 if (ret)
> 2380 return ret;
> 2381
> 2382 ret = sii8620_extcon_init(ctx);
> 2383 if (ret < 0) {
> 2384 dev_err(ctx->dev, "failed to initialize EXTCON\n");
> 2385 return ret;
> 2386 }
> 2387
> 2388 i2c_set_clientdata(client, ctx);
> 2389
> 2390 ctx->bridge.funcs = &sii8620_bridge_funcs;
> 2391 ctx->bridge.of_node = dev->of_node;
> 2392 drm_bridge_add(&ctx->bridge);
> 2393
> 2394 if (!ctx->extcon)
> 2395 sii8620_cable_in(ctx);
> 2396
> 2397 return 0;
> 2398 }
> 2399
> 2400 static int sii8620_remove(struct i2c_client *client)
> 2401 {
> 2402 struct sii8620 *ctx = i2c_get_clientdata(client);
> 2403
> 2404 if (ctx->extcon) {
>> 2405 extcon_unregister_notifier(ctx->extcon, EXTCON_DISP_MHL,
> 2406 &ctx->extcon_nb);
> 2407 flush_work(&ctx->extcon_wq);
> 2408 if (ctx->cable_state > 0)
> 2409 sii8620_cable_out(ctx);
> 2410 } else {
> 2411 sii8620_cable_out(ctx);
> 2412 }
> 2413 drm_bridge_remove(&ctx->bridge);
> 2414
> 2415 return 0;
> 2416 }
> 2417
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation

--
~Randy

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