Hi @lex,

On Sat, 11 Jan 2020 at 15:45, @lex <[email protected]> wrote:

> Here is a workaround that seems to be working so far for the kernel 5.3
> and 5.4.
>

Ok great,

So If you test the patch on linux-next could you add your Tested-by tag on
this patch ?
https://patchwork.kernel.org/patch/11326439/

Regards,
Clement


>
> Small Obs:
> During the tests, dimming the lcd backlight up and down for one hour
> worked without issues.
> I let the board idle for 6 hrs, worked 5 min on other things and had a
> crash. I could not recover the log to investigate it, but does not seem to
> be related to the issue.
>
> BR
> @lex
>
> On Friday, January 10, 2020 at 12:02:44 PM UTC-3, @lex wrote:
>>
>> Hi Clément,
>>
>> [image: backligth.png]
>> I can confirm that the patch fixed the issue (just need to run for a day
>> to make it does not break something else). MIPI-DSI worked out-of-the-box,
>> i just noticed the refresh rate seems to be a bit wrong, maybe i tested it
>> during the night and now it is possible to note this in daylight.
>> Any chance we see a back-port on this soon?
>>
>> Thank you!
>>
>> BR
>> @lex
>>
>>
>>
>> On Friday, January 10, 2020 at 10:22:20 AM UTC-3, @lex wrote:
>>>
>>> Hi Clément,
>>>
>>> I can still see some diff from what i have working in 5.4.8. Maybe this
>>> is redundant and not necessary. Anyway, I will test it soon.
>>>
>>> BR,
>>> @lex
>>>
>>> --- /arm/ubuntu/nanopi-a64-linux-next/linux-next/drivers/gpu/drm/sun4i/
>>> sun6i_mipi_dsi.h
>>> +++ /arm/ubuntu/nanopi-a64-linux-next/linux-5.4.8/drivers/gpu/drm/sun4i/
>>> sun6i_mipi_dsi.h
>>> @@ -13,7 +13,11 @@
>>>  #include <drm/drm_encoder.h>
>>>  #include <drm/drm_mipi_dsi.h>
>>> -#define SUN6I_DSI_TCON_DIV 4
>>> +#include <linux/regulator/consumer.h>
>>> +
>>> +struct sun6i_dsi_variant {
>>> + bool has_mod_clk;
>>> +};
>>>  struct sun6i_dsi {
>>>  struct drm_connector connector;
>>> @@ -29,8 +33,10 @@
>>>  struct device *dev;
>>>  struct sun4i_drv *drv;
>>> + struct sun4i_tcon *tcon;
>>>  struct mipi_dsi_device *device;
>>>  struct drm_panel *panel;
>>> + const struct sun6i_dsi_variant *variant;
>>>  };
>>>  static inline struct sun6i_dsi *host_to_sun6i_dsi(struct mipi_dsi_host
>>> *host)
>>>
>>>
>>> On Friday, January 10, 2020 at 4:50:35 AM UTC-3, Clément Péron wrote:
>>>>
>>>> Hi Alex
>>>>
>>>> Le ven. 10 janv. 2020 à 01:03, @lex <[email protected]> a écrit :
>>>>
>>>>> Hi Clément,
>>>>>
>>>>> Sure, i will try to apply the MIPI-DSI patch to linux-next, but i see
>>>>> there are a lot of changes to be made and this can take some time.
>>>>>
>>>>
>>>> MIPI DSI is already applied in Linux-next for a64.
>>>>
>>>>
>>>>
>>>>> I will report back when i get the results.
>>>>>
>>>> Thanks
>>>> Clement
>>>>
>>>>
>>>> Thanks,
>>>>>
>>>> @lex
>>>>>
>>>>> On Thursday, January 9, 2020 at 8:33:13 PM UTC-3, Clément Péron wrote:
>>>>>>
>>>>>> Hi Alex,
>>>>>>
>>>>>> On Thu, 9 Jan 2020 at 22:51, @lex <[email protected]> wrote:
>>>>>> >
>>>>>> > Clément,
>>>>>> >
>>>>>> > It usually crashes while changing the LCD backlight.
>>>>>> > Not sure it is related, but some time later the board enters in a
>>>>>> sleep mode and shutdown itself (don't resume from that). Screen saver and
>>>>>> power savings are disabled.
>>>>>>
>>>>>> Yes totally makes sense,
>>>>>>
>>>>>> Could you test with this patch on top of linux-next ?
>>>>>> https://patchwork.kernel.org/patch/11326439/
>>>>>>
>>>>>> Thanks
>>>>>> Clément
>>>>>>
>>>>>>
>>>>>> >
>>>>>> > BR,
>>>>>> > @lex
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > On Thursday, January 9, 2020 at 4:59:39 PM UTC-3, Clément Péron
>>>>>> wrote:
>>>>>> >>
>>>>>> >> Hi,
>>>>>> >>
>>>>>> >> On Thu, 9 Jan 2020 at 20:39, @lex <[email protected]> wrote:
>>>>>> >> >
>>>>>> >> > Hi Clément,
>>>>>> >> >
>>>>>> >> > Looks like Kernel 5.5 will be affected too.
>>>>>> >> Yes but if a fix is sent it will be backported to all the kernels
>>>>>> >> affected still maintained.
>>>>>> >>
>>>>>> >> What command do you do to reproduce this?
>>>>>> >>
>>>>>> >> Thanks,
>>>>>> >> Clément
>>>>>> >>
>>>>>> >> >
>>>>>> >> > Thank you.
>>>>>> >> >
>>>>>> >> > BR,
>>>>>> >> > @lex
>>>>>> >> >
>>>>>> >> >
>>>>>> >> > On Thursday, January 9, 2020 at 2:03:43 PM UTC-3, Clément Péron
>>>>>> wrote:
>>>>>> >> >>
>>>>>> >> >> Hi @lex,
>>>>>> >> >>
>>>>>> >> >> On Thu, 9 Jan 2020 at 16:51, @lex <[email protected]> wrote:
>>>>>> >> >> >
>>>>>> >> >> > Just adding some info, 5.3.y has the same issue.
>>>>>> >> >>
>>>>>> >> >> Yes the bug is not fix mainline.
>>>>>> >> >>
>>>>>> >> >> I will open a discussion with the PWM maintainer
>>>>>> >> >>
>>>>>> >> >> Regards,
>>>>>> >> >> Clement
>>>>>> >> >>
>>>>>> >> >> >
>>>>>> >> >> > On Thursday, January 9, 2020 at 9:55:54 AM UTC-3, @lex wrote:
>>>>>> >> >> >>
>>>>>> >> >> >> I asked this because i have not touched the pwm-sun4i driver
>>>>>> code, Only the MIPI-DSI on top of 5.4.8.
>>>>>> >> >> >>
>>>>>> >> >> >> On Thursday, January 9, 2020 at 9:25:11 AM UTC-3, @lex
>>>>>> wrote:
>>>>>> >> >> >>>
>>>>>> >> >> >>> Thank you Vasily for the explanation.
>>>>>> >> >> >>>
>>>>>> >> >> >>> Is this a known bug or i have possibly introduced it while
>>>>>> patching the kernel?
>>>>>> >> >> >>>
>>>>>> >> >> >>> On Wednesday, January 8, 2020 at 9:51:03 PM UTC-3, Vasily
>>>>>> Khoruzhick wrote:
>>>>>> >> >> >>>>
>>>>>> >> >> >>>> The issue is that sun4i_pwm_apply() calls
>>>>>> sun4i_pwm_calculate() which
>>>>>> >> >> >>>> calls clk_get_rate() while holding a spinlock and
>>>>>> clk_get_rate() may
>>>>>> >> >> >>>> sleep.
>>>>>> >> >> >>>>
>>>>>> >> >> >>>> It's a bug in pwm-sun4i driver.
>>>>>> >> >> >>>>
>>>>>> >> >> >>>> On Wed, Jan 8, 2020 at 4:19 PM @lex <[email protected]>
>>>>>> wrote:
>>>>>> >> >> >>>> >
>>>>>> >> >> >>>> > I am doing some experiments with LCD7" with the kernel
>>>>>> 5.4.8 and occasionally i get this crash.
>>>>>> >> >> >>>> > Can someone explain or give some directions on how to
>>>>>> find the offending error based on the crash log?  Any idea what could be
>>>>>> causing this?
>>>>>> >> >> >>>> >
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.681388] BUG:
>>>>>> scheduling while atomic: gsd-backlight-h/3978/0x00000002
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688221]
>>>>>> Modules linked in: fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec
>>>>>> panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem crct10dif_ce
>>>>>> sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx dw_hdmi
>>>>>> videobuf2_memops axp20x_adc cec videobuf2_v4l2 snd_soc_simple_card
>>>>>> sunxi_cir axp20x_usb_power axp20x_ac_power snd_soc_simple_card_utils
>>>>>> pinctrl_axp209 axp20x_battery phy_sun6i_mipi_dphy rc_core 
>>>>>> videobuf2_common
>>>>>> mali(O) sun6i_mipi_dsi sun50i_codec_analog videodev sun8i_adda_pr_regmap
>>>>>> crc_ccitt goodix sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend
>>>>>> sun4i_tcon sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6
>>>>>> nf_defrag_ipv6
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688331] CPU:
>>>>>> 3 PID: 3978 Comm: gsd-backlight-h Tainted: G         C O      5.4.8 #1
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688334]
>>>>>> Hardware name: Pine64+ (DT)
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688339] Call
>>>>>> trace:
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688357]
>>>>>>  dump_backtrace+0x0/0x150
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688364]
>>>>>>  show_stack+0x14/0x20
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688374]
>>>>>>  dump_stack+0xb4/0xd8
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688384]
>>>>>>  __schedule_bug+0x50/0x70
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688392]
>>>>>>  __schedule+0x4bc/0x510
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688397]
>>>>>>  schedule+0x40/0xd0
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688403]
>>>>>>  schedule_preempt_disabled+0x20/0x38
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688410]
>>>>>>  __mutex_lock.isra.10+0x150/0x568
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688416]
>>>>>>  __mutex_lock_slowpath+0x10/0x18
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688422]
>>>>>>  mutex_lock+0x38/0x40
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688430]
>>>>>>  clk_prepare_lock+0x40/0xa0
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688437]
>>>>>>  clk_get_rate+0x1c/0x70
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688446]
>>>>>>  sun4i_pwm_apply+0xb4/0x450
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688453]
>>>>>>  pwm_apply_state+0x64/0x1e8
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688464]
>>>>>>  pwm_backlight_update_status+0xb8/0x198 [pwm_bl]
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688473]
>>>>>>  backlight_device_set_brightness+0x64/0xb8
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688480]
>>>>>>  brightness_store+0x78/0x90
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688488]
>>>>>>  dev_attr_store+0x14/0x28
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688496]
>>>>>>  sysfs_kf_write+0x3c/0x50
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688501]
>>>>>>  kernfs_fop_write+0x144/0x230
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688511]
>>>>>>  __vfs_write+0x18/0x38
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688517]
>>>>>>  vfs_write+0xb4/0x1e0
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688524]
>>>>>>  ksys_write+0x68/0xf8
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688530]
>>>>>>  __arm64_sys_write+0x18/0x20
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688540]
>>>>>>  el0_svc_common.constprop.2+0x64/0x160
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688547]
>>>>>>  el0_svc_handler+0x20/0x80
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688552]
>>>>>>  el0_svc+0x8/0xc
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.688694] BUG:
>>>>>> scheduling while atomic: gsd-backlight-h/3978/0x00000000
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695480]
>>>>>> Modules linked in: fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec
>>>>>> panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem crct10dif_ce
>>>>>> sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx dw_hdmi
>>>>>> videobuf2_memops axp20x_adc cec videobuf2_v4l2 snd_soc_simple_card
>>>>>> sunxi_cir axp20x_usb_power axp20x_ac_power snd_soc_simple_card_utils
>>>>>> pinctrl_axp209 axp20x_battery phy_sun6i_mipi_dphy rc_core 
>>>>>> videobuf2_common
>>>>>> mali(O) sun6i_mipi_dsi sun50i_codec_analog videodev sun8i_adda_pr_regmap
>>>>>> crc_ccitt goodix sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend
>>>>>> sun4i_tcon sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6
>>>>>> nf_defrag_ipv6
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695558] CPU:
>>>>>> 3 PID: 3978 Comm: gsd-backlight-h Tainted: G        WC O      5.4.8 #1
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695561]
>>>>>> Hardware name: Pine64+ (DT)
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695564] Call
>>>>>> trace:
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695579]
>>>>>>  dump_backtrace+0x0/0x150
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695583]
>>>>>>  show_stack+0x14/0x20
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695591]
>>>>>>  dump_stack+0xb4/0xd8
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695600]
>>>>>>  __schedule_bug+0x50/0x70
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695605]
>>>>>>  __schedule+0x4bc/0x510
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695610]
>>>>>>  schedule+0x40/0xd0
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695615]
>>>>>>  do_notify_resume+0x1e0/0x398
>>>>>> >> >> >>>> > Jan  8 23:49:43 pine64-plus kernel: [ 5144.695620]
>>>>>>  work_pending+0x8/0x10
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.894318] BUG:
>>>>>> scheduling while atomic: gsd-backlight-h/3987/0x00000002
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901147]
>>>>>> Modules linked in: fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec
>>>>>> panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem crct10dif_ce
>>>>>> sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx dw_hdmi
>>>>>> videobuf2_memops axp20x_adc cec videobuf2_v4l2 snd_soc_simple_card
>>>>>> sunxi_cir axp20x_usb_power axp20x_ac_power snd_soc_simple_card_utils
>>>>>> pinctrl_axp209 axp20x_battery phy_sun6i_mipi_dphy rc_core 
>>>>>> videobuf2_common
>>>>>> mali(O) sun6i_mipi_dsi sun50i_codec_analog videodev sun8i_adda_pr_regmap
>>>>>> crc_ccitt goodix sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend
>>>>>> sun4i_tcon sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6
>>>>>> nf_defrag_ipv6
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901246] CPU:
>>>>>> 0 PID: 3987 Comm: gsd-backlight-h Tainted: G        WC O      5.4.8 #1
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901250]
>>>>>> Hardware name: Pine64+ (DT)
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901254] Call
>>>>>> trace:
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901271]
>>>>>>  dump_backtrace+0x0/0x150
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901277]
>>>>>>  show_stack+0x14/0x20
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901286]
>>>>>>  dump_stack+0xb4/0xd8
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901296]
>>>>>>  __schedule_bug+0x50/0x70
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901303]
>>>>>>  __schedule+0x4bc/0x510
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901307]
>>>>>>  schedule+0x40/0xd0
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901313]
>>>>>>  schedule_preempt_disabled+0x20/0x38
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901319]
>>>>>>  __mutex_lock.isra.10+0x150/0x568
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901324]
>>>>>>  __mutex_lock_slowpath+0x10/0x18
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901330]
>>>>>>  mutex_lock+0x38/0x40
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901337]
>>>>>>  clk_prepare_lock+0x40/0xa0
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901343]
>>>>>>  clk_get_rate+0x1c/0x70
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901352]
>>>>>>  sun4i_pwm_apply+0xb4/0x450
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901357]
>>>>>>  pwm_apply_state+0x64/0x1e8
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901368]
>>>>>>  pwm_backlight_update_status+0xb8/0x198 [pwm_bl]
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901375]
>>>>>>  backlight_device_set_brightness+0x64/0xb8
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901381]
>>>>>>  brightness_store+0x78/0x90
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901389]
>>>>>>  dev_attr_store+0x14/0x28
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901396]
>>>>>>  sysfs_kf_write+0x3c/0x50
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901401]
>>>>>>  kernfs_fop_write+0x144/0x230
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901409]
>>>>>>  __vfs_write+0x18/0x38
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901415]
>>>>>>  vfs_write+0xb4/0x1e0
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901421]
>>>>>>  ksys_write+0x68/0xf8
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901427]
>>>>>>  __arm64_sys_write+0x18/0x20
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901435]
>>>>>>  el0_svc_common.constprop.2+0x64/0x160
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901441]
>>>>>>  el0_svc_handler+0x20/0x80
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901446]
>>>>>>  el0_svc+0x8/0xc
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.901612] BUG:
>>>>>> scheduling while atomic: gsd-backlight-h/3987/0x00000000
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908388]
>>>>>> Modules linked in: fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec
>>>>>> panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem crct10dif_ce
>>>>>> sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx dw_hdmi
>>>>>> videobuf2_memops axp20x_adc cec videobuf2_v4l2 snd_soc_simple_card
>>>>>> sunxi_cir axp20x_usb_power axp20x_ac_power snd_soc_simple_card_utils
>>>>>> pinctrl_axp209 axp20x_battery phy_sun6i_mipi_dphy rc_core 
>>>>>> videobuf2_common
>>>>>> mali(O) sun6i_mipi_dsi sun50i_codec_analog videodev sun8i_adda_pr_regmap
>>>>>> crc_ccitt goodix sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend
>>>>>> sun4i_tcon sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6
>>>>>> nf_defrag_ipv6
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908479] CPU:
>>>>>> 0 PID: 3987 Comm: gsd-backlight-h Tainted: G        WC O      5.4.8 #1
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908482]
>>>>>> Hardware name: Pine64+ (DT)
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908486] Call
>>>>>> trace:
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908500]
>>>>>>  dump_backtrace+0x0/0x150
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908507]
>>>>>>  show_stack+0x14/0x20
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908517]
>>>>>>  dump_stack+0xb4/0xd8
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908526]
>>>>>>  __schedule_bug+0x50/0x70
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908533]
>>>>>>  __schedule+0x4bc/0x510
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908538]
>>>>>>  schedule+0x40/0xd0
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908545]
>>>>>>  do_notify_resume+0x1e0/0x398
>>>>>> >> >> >>>> > Jan  8 23:49:45 pine64-plus kernel: [ 5146.908551]
>>>>>>  work_pending+0x8/0x10
>>>>>> >> >> >>>> >
>>>>>> >> >> >>>> >
>>>>>> >> >> >>>> >
>>>>>> >> >> >>>> > B.R
>>>>>> >> >> >>>> >
>>>>>> >> >> >>>> > --
>>>>>> >> >> >>>> > You received this message because you are subscribed to
>>>>>> the Google Groups "linux-sunxi" group.
>>>>>> >> >> >>>> > To unsubscribe from this group and stop receiving emails
>>>>>> from it, send an email to [email protected].
>>>>>> >> >> >>>> > To view this discussion on the web, visit
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