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Message-ID: <CAGXv+5Hpcm12h0LNPaQ+svdtCa5AaMkC=qS8WaShWQc2oxQfJg@mail.gmail.com>
Date: Fri, 6 May 2022 20:03:17 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: "Chen, Rong A" <rong.a.chen@...el.com>
Cc: Johnson Wang <johnson.wang@...iatek.com>,
kernel test robot <lkp@...el.com>, cw00.choi@...sung.com,
krzk+dt@...nel.org, robh+dt@...nel.org, kyungmin.park@...sung.com,
llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, jia-wei.chang@...iatek.com,
Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [kbuild-all] Re: [PATCH v3 2/2] PM / devfreq: mediatek: Introduce
MediaTek CCI devfreq driver
On Thu, Apr 28, 2022 at 7:39 PM Chen, Rong A <rong.a.chen@...el.com> wrote:
> On 4/27/2022 6:11 PM, Johnson Wang wrote:
> > On Wed, 2022-04-27 at 17:25 +0800, kernel test robot wrote:
> >> Hi Johnson,
> >>
> >> Thank you for the patch! Perhaps something to improve:
> >>
> >> [auto build test WARNING on robh/for-next]
> >> [also build test WARNING on linus/master v5.18-rc4 next-20220427]
> >> [If your patch is applied to the wrong git tree, kindly drop us a
> >> note.
> >> And when submitting patch, we suggest to use '--base' as documented
> >> in
> >>
> > https://urldefense.com/v3/__https://git-scm.com/docs/git-format-patch__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMS_s9zEZ$
> >> ]
> >>
> >> url:
> >> https://urldefense.com/v3/__https://github.com/intel-lab-lkp/linux/commits/Johnson-Wang/Introduce-MediaTek-CCI-devfreq-driver/20220425-205820__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMc1U_tqz$
> >>
> >> base:
> >> https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMUzTprof$
> >> for-next
> >> config: hexagon-allyesconfig (
> >> https://urldefense.com/v3/__https://download.01.org/0day-ci/archive/20220427/202204271737.oAuTwqZH-lkp@intel.com/config__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMaVRzbSL$
> >> )
> >> compiler: clang version 15.0.0 (
> >> https://urldefense.com/v3/__https://github.com/llvm/llvm-project__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMRqw5IY-$
> >> $ 1cddcfdc3c683b393df1a5c9063252eb60e52818)
> >> reproduce (this is a W=1 build):
> >> wget
> >> https://urldefense.com/v3/__https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMQLiD-i9$
> >> -O ~/bin/make.cross
> >> chmod +x ~/bin/make.cross
> >> #
> >> https://urldefense.com/v3/__https://github.com/intel-lab-lkp/linux/commit/98b34c0587837b0e5b880b11a52433f8f0eee19f__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMU5yd7Y2$
> >>
> >> git remote add linux-review
> >> https://urldefense.com/v3/__https://github.com/intel-lab-lkp/linux__;!!CTRNKA9wMg0ARbw!wdyoWXNLBcYM97vMuNFQXZ9BaajEp-Kmh5-xrvU2Rlmb0o-b9tRvCD0cPzbLMW4ldtnH$
> >>
> >> git fetch --no-tags linux-review Johnson-Wang/Introduce-
> >> MediaTek-CCI-devfreq-driver/20220425-205820
> >> git checkout 98b34c0587837b0e5b880b11a52433f8f0eee19f
> >> # save the config file
> >> mkdir build_dir && cp config build_dir/.config
> >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross
> >> W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash block/partitions/
> >> drivers/devfreq/ drivers/iio/imu/ drivers/misc/lkdtm/
> >>
> >> If you fix the issue, kindly add following tag as appropriate
> >> Reported-by: kernel test robot <lkp@...el.com>
> >>
> >> All warnings (new ones prefixed by >>):
> >>
> >> drivers/devfreq/mtk-cci-devfreq.c:372:16: error: no member named
> >> 'parent_type' in 'struct devfreq_passive_data'
> >> passive_data->parent_type = CPUFREQ_PARENT_DEV;
> >> ~~~~~~~~~~~~ ^
> >> drivers/devfreq/mtk-cci-devfreq.c:372:30: error: use of undeclared
> >> identifier 'CPUFREQ_PARENT_DEV'
> >> passive_data->parent_type = CPUFREQ_PARENT_DEV;
> >> ^
> >>>> drivers/devfreq/mtk-cci-devfreq.c:379:4: warning: format
> >>>> specifies type 'int' but the argument has type 'long' [-Wformat]
> >>
> >> PTR_ERR(drv->devfreq));
> >> ^~~~~~~~~~~~~~~~~~~~~
> >> include/linux/dev_printk.h:144:65: note: expanded from macro
> >> 'dev_err'
> >> dev_printk_index_wrap(_dev_err, KERN_ERR, dev,
> >> dev_fmt(fmt), ##__VA_ARGS__)
> >> ~~~
> >> ^~~~~~~~~~~
> >> include/linux/dev_printk.h:110:23: note: expanded from macro
> >> 'dev_printk_index_wrap'
> >> _p_func(dev, fmt,
> >> ##__VA_ARGS__); \
> >> ~~~ ^~~~~~~~~~~
> >> 1 warning and 2 errors generated.
> >>
> >>
> >> vim +379 drivers/devfreq/mtk-cci-devfreq.c
> >>
> >> 255
> >> 256 static int mtk_ccifreq_probe(struct platform_device
> >> *pdev)
> >> 257 {
> >> 258 struct device *dev = &pdev->dev;
> >> 259 struct mtk_ccifreq_drv *drv;
> >> 260 struct devfreq_passive_data *passive_data;
> >> 261 struct dev_pm_opp *opp;
> >> 262 unsigned long rate, opp_volt;
> >> 263 int ret;
> >> 264
> >> 265 drv = devm_kzalloc(dev, sizeof(*drv),
> >> GFP_KERNEL);
> >> 266 if (!drv)
> >> 267 return -ENOMEM;
> >> 268
> >> 269 drv->dev = dev;
> >> 270 drv->soc_data = (const struct
> >> mtk_ccifreq_platform_data *)
> >> 271 of_device_get_match_dat
> >> a(&pdev->dev);
> >> 272 mutex_init(&drv->reg_lock);
> >> 273 platform_set_drvdata(pdev, drv);
> >> 274
> >> 275 drv->cci_clk = devm_clk_get(dev, "cci");
> >> 276 if (IS_ERR(drv->cci_clk)) {
> >> 277 ret = PTR_ERR(drv->cci_clk);
> >> 278 return dev_err_probe(dev, ret,
> >> 279 "failed to get cci
> >> clk: %d\n", ret);
> >> 280 }
> >> 281
> >> 282 drv->inter_clk = devm_clk_get(dev,
> >> "intermediate");
> >> 283 if (IS_ERR(drv->inter_clk)) {
> >> 284 ret = PTR_ERR(drv->inter_clk);
> >> 285 dev_err_probe(dev, ret,
> >> 286 "failed to get
> >> intermediate clk: %d\n", ret);
> >> 287 goto out_free_resources;
> >> 288 }
> >> 289
> >> 290 drv->proc_reg =
> >> devm_regulator_get_optional(dev, "proc");
> >> 291 if (IS_ERR(drv->proc_reg)) {
> >> 292 ret = PTR_ERR(drv->proc_reg);
> >> 293 dev_err_probe(dev, ret,
> >> 294 "failed to get proc
> >> regulator: %d\n", ret);
> >> 295 goto out_free_resources;
> >> 296 }
> >> 297
> >> 298 ret = regulator_enable(drv->proc_reg);
> >> 299 if (ret) {
> >> 300 dev_err(dev, "failed to enable proc
> >> regulator\n");
> >> 301 goto out_free_resources;
> >> 302 }
> >> 303
> >> 304 drv->sram_reg = regulator_get_optional(dev,
> >> "sram");
> >> 305 if (IS_ERR(drv->sram_reg))
> >> 306 drv->sram_reg = NULL;
> >> 307 else {
> >> 308 ret = regulator_enable(drv->sram_reg);
> >> 309 if (ret) {
> >> 310 dev_err(dev, "failed to enable
> >> sram regulator\n");
> >> 311 goto out_free_resources;
> >> 312 }
> >> 313 }
> >> 314
> >> 315 /*
> >> 316 * We assume min voltage is 0 and tracking
> >> target voltage using
> >> 317 * min_volt_shift for each iteration.
> >> 318 * The retry_max is 3 times of expeted
> >> iteration count.
> >> 319 */
> >> 320 drv->vtrack_max = 3 * DIV_ROUND_UP(max(drv-
> >>> soc_data->sram_max_volt,
> >> 321 drv-
> >>> soc_data->proc_max_volt),
> >> 322 drv-
> >>> soc_data->min_volt_shift);
> >> 323
> >> 324 ret = clk_prepare_enable(drv->cci_clk);
> >> 325 if (ret)
> >> 326 goto out_free_resources;
> >> 327
> >> 328 ret = clk_prepare_enable(drv->inter_clk);
> >> 329 if (ret)
> >> 330 goto out_disable_cci_clk;
> >> 331
> >> 332 ret = dev_pm_opp_of_add_table(dev);
> >> 333 if (ret) {
> >> 334 dev_err(dev, "failed to add opp table:
> >> %d\n", ret);
> >> 335 goto out_disable_inter_clk;
> >> 336 }
> >> 337
> >> 338 rate = clk_get_rate(drv->inter_clk);
> >> 339 opp = dev_pm_opp_find_freq_ceil(dev, &rate);
> >> 340 if (IS_ERR(opp)) {
> >> 341 ret = PTR_ERR(opp);
> >> 342 dev_err(dev, "failed to get
> >> intermediate opp: %d\n", ret);
> >> 343 goto out_remove_opp_table;
> >> 344 }
> >> 345 drv->inter_voltage =
> >> dev_pm_opp_get_voltage(opp);
> >> 346 dev_pm_opp_put(opp);
> >> 347
> >> 348 rate = U32_MAX;
> >> 349 opp = dev_pm_opp_find_freq_floor(drv->dev,
> >> &rate);
> >> 350 if (IS_ERR(opp)) {
> >> 351 dev_err(dev, "failed to get opp\n");
> >> 352 ret = PTR_ERR(opp);
> >> 353 goto out_remove_opp_table;
> >> 354 }
> >> 355
> >> 356 opp_volt = dev_pm_opp_get_voltage(opp);
> >> 357 dev_pm_opp_put(opp);
> >> 358 ret = mtk_ccifreq_set_voltage(drv, opp_volt);
> >> 359 if (ret) {
> >> 360 dev_err(dev, "failed to scale to
> >> highest voltage %lu in proc_reg\n",
> >> 361 opp_volt);
> >> 362 goto out_remove_opp_table;
> >> 363 }
> >> 364
> >> 365 passive_data = devm_kzalloc(dev, sizeof(struct
> >> devfreq_passive_data),
> >> 366 GFP_KERNEL);
> >> 367 if (!passive_data) {
> >> 368 ret = -ENOMEM;
> >> 369 goto out_remove_opp_table;
> >> 370 }
> >> 371
> >> 372 passive_data->parent_type = CPUFREQ_PARENT_DEV;
> >> 373 drv->devfreq = devm_devfreq_add_device(dev,
> >> &mtk_ccifreq_profile,
> >> 374 DEVFREQ_
> >> GOV_PASSIVE,
> >> 375 passive_
> >> data);
> >> 376 if (IS_ERR(drv->devfreq)) {
> >> 377 ret = -EPROBE_DEFER;
> >> 378 dev_err(dev, "failed to add devfreq
> >> device: %d\n",
> >> > 379 PTR_ERR(drv->devfreq));
> >> 380 goto out_remove_opp_table;
> >> 381 }
> >> 382
> >> 383 drv->opp_nb.notifier_call =
> >> mtk_ccifreq_opp_notifier;
> >> 384 ret = dev_pm_opp_register_notifier(dev, &drv-
> >>> opp_nb);
> >> 385 if (ret) {
> >> 386 dev_err(dev, "failed to register opp
> >> notifier: %d\n", ret);
> >> 387 goto out_remove_devfreq_device;
> >> 388 }
> >> 389 return 0;
> >> 390
> >> 391 out_remove_devfreq_device:
> >> 392 devm_devfreq_remove_device(dev, drv->devfreq);
> >> 393
> >> 394 out_remove_opp_table:
> >> 395 dev_pm_opp_of_remove_table(dev);
> >> 396
> >> 397 out_disable_inter_clk:
> >> 398 clk_disable_unprepare(drv->inter_clk);
> >> 399
> >> 400 out_disable_cci_clk:
> >> 401 clk_disable_unprepare(drv->cci_clk);
> >> 402
> >> 403 out_free_resources:
> >> 404 if (regulator_is_enabled(drv->proc_reg))
> >> 405 regulator_disable(drv->proc_reg);
> >> 406 if (drv->sram_reg && regulator_is_enabled(drv-
> >>> sram_reg))
> >> 407 regulator_disable(drv->sram_reg);
> >> 408
> >> 409 if (!IS_ERR(drv->proc_reg))
> >> 410 regulator_put(drv->proc_reg);
> >> 411 if (!IS_ERR(drv->sram_reg))
> >> 412 regulator_put(drv->sram_reg);
> >> 413 if (!IS_ERR(drv->cci_clk))
> >> 414 clk_put(drv->cci_clk);
> >> 415 if (!IS_ERR(drv->inter_clk))
> >> 416 clk_put(drv->inter_clk);
> >> 417
> >> 418 return ret;
> >> 419 }
> >> 420
> >>
> >
> > Hi "kernel test robot",
> >
> > Thanks for your review.
> >
> > This patch is based on chanwoo/devfreq-testing[1]
> > [1]
> > https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git/log/?h=devfreq-testing
>
> Hi Johnson,
>
> Thanks for the feedback, we'll take a look too.
I think the last patch on that branch might be broken.
ChenYu
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