Re: [PATCH v8 00/42] ARM: davinci: convert to common clock framework​

[Bartosz Golaszewski]

2018-03-19 17:14 GMT+01:00 Bartosz Golaszewski <bgolaszewski at baylibre.com>:
> 2018-03-19 17:11 GMT+01:00 Adam Ford <aford173 at gmail.com>:
>> On Mon, Mar 19, 2018 at 10:59 AM, David Lechner <david at lechnology.com> wrote:
>>> On 03/19/2018 08:17 AM, Bartosz Golaszewski wrote:
>>>>
>>>> 2018-03-16 3:52 GMT+01:00 David Lechner <david at lechnology.com>:
>>>>>
>>>>> This series converts mach-davinci to use the common clock framework.
>>>>>
>>>>> The series works like this, the first 19 patches create new clock drivers
>>>>> using the common clock framework. There are basically 3 groups of clocks
>>>>> -
>>>>> PLL, PSC and CFGCHIP (syscon). There are six different SoCs that each
>>>>> have
>>>>> unique init data, which is the reason for so many patches.
>>>>>
>>>>> Then, starting with "ARM: davinci: pass clock as parameter to
>>>>> davinci_timer_init()", we get the mach code ready for the switch by
>>>>> adding the
>>>>> code needed for the new clock drivers and adding #ifndef
>>>>> CONFIG_COMMON_CLK
>>>>> around the legacy clocks so that we can switch easily between the old and
>>>>> the
>>>>> new.
>>>>>
>>>>> "ARM: davinci: switch to common clock framework" actually flips the
>>>>> switch
>>>>> to start using the new clock drivers. Then the next 8 patches remove all
>>>>> of the old clock code.
>>>>>
>>>>> The final three patches add device tree clock support to the one SoC that
>>>>> supports it.
>>>>>
>>>>> This series has been tested on LEGO MINDSTORMS EV3 (device tree) and TI
>>>>> OMAP-L138 LCDK (both device tree and legacy board file).
>>>>>
>>>>
>>>> Hi David,
>>>>
>>>> thanks, with the u-boot fix everything seems to work fine. I tested
>>>> da850-lcdk and da850-evm boards in DT and board file modes.
>>>>
>>
>> I tested MMC and Ethernet.  Both appear to be operating normally, but
>> I have having USB issues.
>>
>> Should I be testing cpufreq?  I noticed that when changing the
>> frequencies, the USB appears to stop recognizing connections and
>> disconnections.
>>
>> I did some testing on the DA850-EVM with USB from your repo, and I'm
>> getting some crashing on MUSB unplug that do not appear in the
>> 4.16-RC6 from linux-stable:
>>
>>
>> ------------[ cut here ]------------
>> WARNING: CPU: 0 PID: 13 at drivers/dma/cppi41.c:694
>> cppi41_stop_chan+0x1f4/0x378 [cppi41]
>> Modules linked in: evbug evdev mousedev hid_generic usbhid hid
>> usb_f_ss_lb g_zero libcomposite configfs ofpart cmdlinepart m25p80
>> spi_nor cppi41 adv7343 tvp514x vpif_display vpif_capture
>> videobuf2_dma_con
>> tig videobuf2_memops videobuf2_v4l2 videobuf2_common v4l2_fwnode
>> v4l2_common snd_soc_simple_card tilcdc spi_davinci
>> snd_soc_simple_card_utils videodev pwm_tiecap spi_bitbang da8xx
>> drm_kms_helper phy_gener
>> ic syscopyarea ohci_da8xx musb_hdrc sysfillrect sysimgblt fb_sys_fops
>> ohci_hcd udc_core drm usbcore drm_panel_orientation_quirks usb_common
>> snd_soc_tlv320aic3x vpif snd_soc_davinci_mcasp snd_soc_edma snd_
>> soc_core snd_pcm_dmaengine snd_pcm rtc_omap snd_timer snd soundcore
>> phy_da8xx_usb davinci_nand nand nand_ecc mtd pwm_bl backlight
>> cpufreq_dt ti_aemif
>> CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted 4.16.0-rc5-g291ba8b-dirty #3
>> Hardware name: Generic DA850/OMAP-L138/AM18x
>> Workqueue: usb_hub_wq hub_event [usbcore]
>> Backtrace:
>> [<c000df94>] (dump_backtrace) from [<c000e264>] (show_stack+0x18/0x1c)
>>  r7:00000009 r6:00000000 r5:bf339ad0 r4:00000000
>> [<c000e24c>] (show_stack) from [<c04864c0>] (dump_stack+0x20/0x28)
>> [<c04864a0>] (dump_stack) from [<c001ac38>] (__warn+0xd4/0xfc)
>> [<c001ab64>] (__warn) from [<c001ad7c>] (warn_slowpath_null+0x44/0x50)
>>  r8:c6c43080 r7:c05f1008 r6:bf338744 r5:000002b6 r4:bf339ad0
>> [<c001ad38>] (warn_slowpath_null) from [<bf338744>]
>> (cppi41_stop_chan+0x1f4/0x378 [cppi41])
>>  r6:c5e59410 r5:c5e59420 r4:c5feca50
>> [<bf338550>] (cppi41_stop_chan [cppi41]) from [<bf213dac>]
>> (cppi41_dma_channel_abort+0xe0/0x2a8 [musb_hdrc])
>>  r8:c6929180 r7:00000000 r6:c5c67290 r5:bf2175a0 r4:00000008
>> [<bf213ccc>] (cppi41_dma_channel_abort [musb_hdrc]) from [<bf20c4bc>]
>> (musb_cleanup_urb+0x60/0x210 [musb_hdrc])
>>  r10:00000001 r9:c5fca010 r8:c5c67290 r7:a0000093 r6:00000080 r5:c55b5100
>>  r4:c5fca5a8
>> [<bf20c45c>] (musb_cleanup_urb [musb_hdrc]) from [<bf20ca8c>]
>> (musb_urb_dequeue+0xfc/0x164 [musb_hdrc])
>>  r10:00000001 r9:40408280 r8:c5fca010 r7:a0000093 r6:00000000 r5:c55b5380
>>  r4:c55b5100
>> [<bf20c990>] (musb_urb_dequeue [musb_hdrc]) from [<bf10fd7c>]
>> (unlink1+0x34/0x13c [usbcore])
>>  r10:00000100 r9:c5cb2a00 r8:c55b5100 r7:ffffff94 r6:c5c6c000 r5:c5dd2380
>>  r4:c55b5100 r3:bf20c990
>> [<bf10fd48>] (unlink1 [usbcore]) from [<bf112424>]
>> (usb_hcd_flush_endpoint+0x164/0x1a4 [usbcore])
>>  r9:c5cb2a00 r8:c55b5100 r7:c5c6c000 r6:c5dd2398 r5:c5dd2380 r4:ffffe000
>> [<bf1122c0>] (usb_hcd_flush_endpoint [usbcore]) from [<bf11563c>]
>> (usb_disable_endpoint+0x50/0x94 [usbcore])
>>  r9:c5cb2a00 r8:bf39e898 r7:00000000 r6:c5c43000 r5:c5c43000 r4:c5dd2380
>> [<bf1155ec>] (usb_disable_endpoint [usbcore]) from [<bf1156c4>]
>> (usb_disable_interface+0x44/0x58 [usbcore])
>>  r5:c5dd2348 r4:00000000
>> [<bf115680>] (usb_disable_interface [usbcore]) from [<bf118044>]
>> (usb_unbind_interface+0x1c0/0x268 [usbcore])
>>  r7:c5cb2c00 r6:bf39e898 r5:c5cb2c20 r4:c5cb2c20
>> [<bf117e84>] (usb_unbind_interface [usbcore]) from [<c02ce180>]
>> (device_release_driver_internal+0x160/0x208)
>>  r10:00000100 r9:c5cb2a00 r8:00000034 r7:00000000 r6:bf39e898 r5:c5cb2c54
>>  r4:c5cb2c20
>> [<c02ce020>] (device_release_driver_internal) from [<c02ce240>]
>> (device_release_driver+0x18/0x1c)
>>  r9:c5cb2a00 r8:c05f1008 r7:c5c43070 r6:bf12895c r5:c5cb2c20 r4:c5dc91ac
>> [<c02ce228>] (device_release_driver) from [<c02ccf70>]
>> (bus_remove_device+0xd0/0x100)
>> [<c02ccea0>] (bus_remove_device) from [<c02c9c60>] (device_del+0x120/0x378)
>>  r7:c5c43070 r6:c5cb2c28 r5:00000000 r4:c5cb2c20
>> [<c02c9b40>] (device_del) from [<bf11576c>]
>> (usb_disable_device+0x94/0x1d8 [usbcore])
>>  r10:00000100 r9:c5cb2a00 r8:c5cb2c00 r7:c5c6c000 r6:00000001 r5:00000000
>>  r4:c5c43000
>> [<bf1156d8>] (usb_disable_device [usbcore]) from [<bf10bccc>]
>> (usb_disconnect+0xb4/0x244 [usbcore])
>>  r9:c5cb2a00 r8:c5c2d600 r7:c5c430a4 r6:c5c43070 r5:c5c43000 r4:00000000
>> [<bf10bc18>] (usb_disconnect [usbcore]) from [<bf10d788>]
>> (hub_event+0x678/0x11dc [usbcore])
>>  r10:00000100 r9:c05f1008 r8:c5c2dcf8 r7:c68fc400 r6:00000001 r5:40000000
>>  r4:00000000
>> [<bf10d110>] (hub_event [usbcore]) from [<c0031db0>]
>> (process_one_work+0x1d8/0x41c)
>>  r10:00000008 r9:00000000 r8:c060b1d0 r7:00000000 r6:c7ede200 r5:c6882480
>>  r4:c5c2dcf8
>> [<c0031bd8>] (process_one_work) from [<c0032030>] (worker_thread+0x3c/0x670)
>>  r10:00000008 r9:c060b1e4 r8:c061ab60 r7:c6882498 r6:ffffe000 r5:c060b1d0
>>  r4:c6882480
>> [<c0031ff4>] (worker_thread) from [<c0038270>] (kthread+0x134/0x14c)
>>  r10:c683fe90 r9:c0031ff4 r8:c6882480 r7:c6896000 r6:00000000 r5:c687bd80
>>  r4:c6803e80
>> [<c003813c>] (kthread) from [<c00090e0>] (ret_from_fork+0x14/0x34)
>> Exception stack(0xc6897fb0 to 0xc6897ff8)
>> 7fa0:                                     00000000 00000000 00000000 00000000
>> 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>> 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>>  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c003813c
>>  r4:c687bd80
>> ---[ end trace cb9c7f93aaa3ed36 ]---
>> ------------[ cut here ]------------
>>
>>
>> adam
>>
>
> Hi Adam,
>
> this is a known issue and it's present in mainline and even in TI BSP.
> It's been deprioritized for now, but I'll return to debugging it once
> the common clock conversion is complete.
>
> Thanks,
> Bartosz

Ugh, -ETOOEARLY

I meant the ohci dying during cpufreq bug, not the crash you posted.

Bart