[Letux-kernel] ov9655 madness in 4.20

[Andreas Kemnade]

Hi,

the general state seems still to be that runnig camera-demo works once
and not more.
After playing around with 4.20 and the camera (without my
patch) I produced this:

[  194.327819] ov9655 1-0030: ov9655_probe
[  194.331909] ov9655 1-0030: 1-0030 supply dvdd not found, using dummy regulator
[  194.353973] ov9655 1-0030: Linked as a consumer to regulator.0
[  194.367889] ov9655 1-0030: 1-0030 supply dovdd not found, using dummy regulator
[  194.383972] ov9655 1-0030: Linked as a consumer to regulator.5
[  194.391418] ov9655 1-0030: __ov9655_set_power on=1
[  194.504302] ov9655 1-0030: OV9655 read register 1c : 7f
[  194.510406] ov9655 1-0030: OV9655 read register 1d : a2
[  194.518829] ov9655 1-0030: OV9655 read register 0a : 96
[  194.525238] ov9655 1-0030: OV9655 read register 0b : 57
[  194.530883] ov9655 1-0030: __ov9655_set_power on=0
[  194.537048] ov9655 1-0030: OV9655 REV5 detected at address 0x30
[  194.652770] ov9655 1-0030: ov9655_open
[  216.898834] ov9655 1-0030: ov9655_open
[  216.902801] ov9655 1-0030: ov9655_set_format 0
[  216.908569] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  216.916229] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  220.088836] ov9655 1-0030: ov9655_set_power on=1
[  220.100219] ov9655 1-0030: __ov9655_set_power on=1
[  220.213958] ov9655 1-0030: ov9655_reset
[  220.218902] ov9655 1-0030: OV9655 read register 15 : 00
[  220.227233] ov9655 1-0030: OV9655 write register 15 : 40
[  220.233337] ov9655 1-0030: OV9655 read register 3c : 0c
[  220.239532] ov9655 1-0030: OV9655 write register 3c : 8c
[  220.245849] ov9655 1-0030: ov9655_reset: output_drive 3
[  220.252288] ov9655 1-0030: OV9655 read register 09 : 01
[  220.259735] ov9655 1-0030: OV9655 write register 09 : 03
[  220.265960] ov9655 1-0030: ov9655_reset: pclk_sample 0
[  220.272186] ov9655 1-0030: OV9655 read register 15 : 40
[  220.278472] ov9655 1-0030: OV9655 write register 15 : 50
[  220.284606] ov9655 1-0030: ov9655_reset: vsync_active 1
[  220.290863] ov9655 1-0030: OV9655 read register 15 : 50
[  220.297210] ov9655 1-0030: ov9655_reset: hsync_active 0
[  220.303466] ov9655 1-0030: OV9655 read register 15 : 50
[  220.309753] ov9655 1-0030: ov9655_reset: pclk_delay 2
[  220.316192] ov9655 1-0030: OV9655 read register 3a : 8c
[  220.321868] ov9655 1-0030: ov9655_reset: data_active 1
[  220.328704] ov9655 1-0030: OV9655 read register 3a : 8c
[  220.334930] ov9655 1-0030: ov9655_reset: clock_noncontinuous 0
[  220.341857] ov9655 1-0030: OV9655 read register 15 : 50
[  220.348297] ov9655 1-0030: ov9655_reset: slave_mode 0
[  220.354705] ov9655 1-0030: OV9655 read register 15 : 50
[  220.360412] ov9655 1-0030: ov9655_reset: bus_width 10
[  220.366424] ov9655 1-0030: ov9655_reset: data_shift 2
[  220.371826] ov9655 1-0030: ov9655_s_ctrl 00980911
[  220.377349] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_EXPOSURE 00008000
[  220.385223] ov9655 1-0030: OV9655 read register a1 : 40
[  220.390960] ov9655 1-0030: OV9655 write register a1 : 60
[  220.397460] ov9655 1-0030: OV9655 write register 10 : 00
[  220.405029] ov9655 1-0030: OV9655 read register 04 : 00
[  220.410705] ov9655 1-0030: ov9655_s_ctrl 00980914
[  220.416381] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_HFLIP 0
[  220.422943] ov9655 1-0030: OV9655 read register 1e : 00
[  220.429290] ov9655 1-0030: ov9655_s_ctrl 00980915
[  220.434722] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_VFLIP 0
[  220.441253] ov9655 1-0030: OV9655 read register 1e : 00
[  220.447631] ov9655 1-0030: ov9655_s_ctrl 009f0903
[  220.452575] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_TEST_PATTERN 0
[  220.460144] ov9655 1-0030: OV9655 read register 0c : 00
[  220.467041] ov9655 1-0030: OV9655 read register 8d : 00
[  220.472747] ov9655 1-0030: ov9655_s_ctrl 00981902
[  220.478454] ov9655 1-0030: ov9655_s_ctrl 00981903
[  220.483398] ov9655 1-0030: ov9655_s_ctrl 00981904
[  220.488830] ov9655 1-0030: ov9655_s_ctrl 00981905
[  220.557159] ov9655 1-0030: ov9655_get_format
[  220.561859] ov9655 1-0030: __ov9655_get_pad_format: pad=0 which=1 V4L2_SUBDEV_FORMAT_ACTIVE
[  220.571655] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  220.579406] ov9655 1-0030: ov9655_get_format
[  220.584381] ov9655 1-0030: __ov9655_get_pad_format: pad=0 which=1 V4L2_SUBDEV_FORMAT_ACTIVE
[  220.593292] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  220.602142] ov9655 1-0030: ov9655_s_stream(1)
[  220.607452] ov9655 1-0030: ov9655_set_params
[  220.611938] ov9655 1-0030: OV9655 write register 0f : 40
[  220.618377] ov9655 1-0030: OV9655 write register 3b : 05
[  220.625183] ov9655 1-0030: OV9655 write register 40 : c0
[  220.631622] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  220.640136] ov9655 1-0030: OV9655 read register 12 : 02
[  220.647583] ov9655 1-0030: OV9655 read register 6b : 0a
[  220.654418] ov9655 1-0030: OV9655 write register 6b : 4a
[  220.660552] ov9655 1-0030: OV9655 write register 11 : 00
[  220.667388] ov9655 1-0030: OV9655 write register 73 : 00
[  220.675201] ov9655 1-0030: OV9655 read register 41 : 40
[  220.681579] ov9655 1-0030: OV9655 read register c7 : 80
[  220.688079] ov9655 1-0030: OV9655 write register 72 : 00
[  220.694274] ov9655 1-0030: OV9655 write register 17 : 19
[  220.701263] ov9655 1-0030: OV9655 read register 32 : a4
[  220.707580] ov9655 1-0030: OV9655 write register 18 : b9
[  220.714813] ov9655 1-0030: OV9655 read register 32 : a4
[  220.720489] ov9655 1-0030: OV9655 write register 32 : 84
[  220.727264] ov9655 1-0030: OV9655 write register 19 : 00
[  220.735198] ov9655 1-0030: OV9655 read register 03 : 12
[  220.740966] ov9655 1-0030: OV9655 write register 03 : 10
[  220.747406] ov9655 1-0030: OV9655 write register 1a : 80
[  220.755096] ov9655 1-0030: OV9655 read register 03 : 10
[  220.760803] ov9655 1-0030: OV9655 write register 03 : 00
[  220.767639] ov9655 1-0030: OV9655 write register 36 : f9
[  220.774658] ov9655 1-0030: OV9655 write register 69 : 02
[  220.781311] ov9655 1-0030: OV9655 read register 8c : 0c
[  220.787567] ov9655 1-0030: OV9655 write register a9 : 8d
[  220.794525] ov9655 1-0030: format->code=00002006
[  220.800292] ov9655 1-0030: OV9655 read register 0c : 00
[  220.807281] ov9655 1-0030: OV9655 read register 12 : 02
[  220.814300] ov9655 1-0030: OV9655 read register 3a : 8c
[  220.820648] ov9655 1-0030: OV9655 read register 40 : c0
[  220.826934] ov9655 1-0030: format->field=00000001
[  220.832794] ov9655 1-0030: OV9655 read register 10 : 5f
[  220.839050] ov9655 1-0030: OV9655 write register 10 : 4f
[  253.586425] ov9655 1-0030: ov9655_s_stream(0)
[  253.591461] ov9655 1-0030: OV9655 read register 09 : 03
[  253.599212] ov9655 1-0030: OV9655 write register 09 : 13
[  253.612152] ov9655 1-0030: ov9655_set_power on=0
[  253.617950] ov9655 1-0030: __ov9655_set_power on=0
[  255.484436] ov9655 1-0030: ov9655_open
[  255.488403] ov9655 1-0030: ov9655_set_format 0
[  255.493255] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  255.501312] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  257.003845] ov9655 1-0030: ov9655_set_power on=1
[  257.008819] ov9655 1-0030: __ov9655_set_power on=1
[  257.124938] ov9655 1-0030: ov9655_reset
[  257.130523] ov9655 1-0030: OV9655 read register 15 : 50
[  257.139984] ov9655 1-0030: OV9655 read register 3c : 8c
[  257.146209] ov9655 1-0030: ov9655_reset: output_drive 3
[  257.152526] ov9655 1-0030: OV9655 read register 09 : 13
[  257.158813] ov9655 1-0030: ov9655_reset: pclk_sample 0
[  257.165405] ov9655 1-0030: OV9655 read register 15 : 50
[  257.171112] ov9655 1-0030: ov9655_reset: vsync_active 1
[  257.178009] ov9655 1-0030: OV9655 read register 15 : 50
[  257.184387] ov9655 1-0030: ov9655_reset: hsync_active 0
[  257.190673] ov9655 1-0030: OV9655 read register 15 : 50
[  257.196990] ov9655 1-0030: ov9655_reset: pclk_delay 2
[  257.203063] ov9655 1-0030: OV9655 read register 3a : 8c
[  257.209442] ov9655 1-0030: ov9655_reset: data_active 1
[  257.216064] ov9655 1-0030: OV9655 read register 3a : 8c
[  257.221740] ov9655 1-0030: ov9655_reset: clock_noncontinuous 0
[  257.229217] ov9655 1-0030: OV9655 read register 15 : 50
[  257.235534] ov9655 1-0030: ov9655_reset: slave_mode 0
[  257.241607] ov9655 1-0030: OV9655 read register 15 : 50
[  257.247894] ov9655 1-0030: ov9655_reset: bus_width 10
[  257.253295] ov9655 1-0030: ov9655_reset: data_shift 2
[  257.259216] ov9655 1-0030: ov9655_s_ctrl 00980911
[  257.264587] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_EXPOSURE 00008000
[  257.273315] ov9655 1-0030: OV9655 read register a1 : 01
[  257.279693] ov9655 1-0030: OV9655 write register a1 : 20
[  257.285888] ov9655 1-0030: OV9655 write register 10 : 00
[  257.292846] ov9655 1-0030: OV9655 read register 04 : 01
[  257.299163] ov9655 1-0030: OV9655 write register 04 : 00
[  257.305419] ov9655 1-0030: ov9655_s_ctrl 00980914
[  257.310455] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_HFLIP 0
[  257.317382] ov9655 1-0030: OV9655 read register 1e : 00
[  257.323089] ov9655 1-0030: ov9655_s_ctrl 00980915
[  257.328735] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_VFLIP 0
[  257.335601] ov9655 1-0030: OV9655 read register 1e : 00
[  257.341308] ov9655 1-0030: ov9655_s_ctrl 009f0903
[  257.346954] ov9655 1-0030: ov9655_s_ctrl: V4L2_CID_TEST_PATTERN 0
[  257.354736] ov9655 1-0030: OV9655 read register 0c : 00
[  257.361083] ov9655 1-0030: OV9655 read register 8d : 00
[  257.367370] ov9655 1-0030: ov9655_s_ctrl 00981902
[  257.372314] ov9655 1-0030: ov9655_s_ctrl 00981903
[  257.377746] ov9655 1-0030: ov9655_s_ctrl 00981904
[  257.382812] ov9655 1-0030: ov9655_s_ctrl 00981905
[  257.451232] ov9655 1-0030: ov9655_get_format
[  257.456268] ov9655 1-0030: __ov9655_get_pad_format: pad=0 which=1 V4L2_SUBDEV_FORMAT_ACTIVE
[  257.465881] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  257.473114] ov9655 1-0030: ov9655_get_format
[  257.478179] ov9655 1-0030: __ov9655_get_pad_format: pad=0 which=1 V4L2_SUBDEV_FORMAT_ACTIVE
[  257.487548] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  257.495117] ov9655 1-0030: ov9655_s_stream(1)
[  257.499664] ov9655 1-0030: ov9655_set_params
[  257.504638] ov9655 1-0030: OV9655 write register 0f : 40
[  257.510559] ov9655 1-0030: OV9655 write register 3b : 05
[  257.516906] ov9655 1-0030: OV9655 write register 40 : c0
[  257.523254] ov9655 1-0030: busfmt: h=1024 w=1280 code=8198 field=1 csp=8
[  257.531799] ov9655 1-0030: OV9655 read register 12 : 02
[  257.538818] ov9655 1-0030: OV9655 read register 6b : 4a
[  257.545135] ov9655 1-0030: OV9655 write register 11 : 00
[  257.551025] ov9655 1-0030: OV9655 write register 73 : 00
[  257.558380] ov9655 1-0030: OV9655 read register 41 : 40
[  257.565368] ov9655 1-0030: OV9655 read register c7 : 80
[  257.571075] ov9655 1-0030: OV9655 write register 72 : 00
[  257.577514] ov9655 1-0030: OV9655 write register 17 : 19
[  257.585113] ov9655 1-0030: OV9655 read register 32 : 84
[  257.590850] ov9655 1-0030: OV9655 write register 18 : b9
[  257.598449] ov9655 1-0030: OV9655 read register 32 : 84
[  257.604797] ov9655 1-0030: OV9655 write register 19 : 00
[  257.611785] ov9655 1-0030: OV9655 read register 03 : 00
[  257.618072] ov9655 1-0030: OV9655 write register 1a : 80
[  257.625335] ov9655 1-0030: OV9655 read register 03 : 00
[  257.631103] ov9655 1-0030: OV9655 write register 36 : f9
[  257.637573] ov9655 1-0030: OV9655 write register 69 : 02
[  257.645111] ov9655 1-0030: OV9655 read register 8c : 0c
[  257.650817] ov9655 1-0030: OV9655 write register a9 : 8d
[  257.657318] ov9655 1-0030: format->code=00002006
[  257.662902] ov9655 1-0030: OV9655 read register 0c : 00
[  257.669921] ov9655 1-0030: OV9655 read register 12 : 02
[  257.676879] ov9655 1-0030: OV9655 read register 3a : 8c
[  257.689971] ov9655 1-0030: OV9655 read register 40 : c0
[  257.702209] ov9655 1-0030: format->field=00000001
[  257.712707] ov9655 1-0030: OV9655 read register 10 : 00
[  269.444061] omap3isp 480bc000.isp: CCDC stop timeout!
[  269.449798] omap3isp 480bc000.isp: Unable to stop OMAP3 ISP CCDC
[  269.457672] ov9655 1-0030: ov9655_s_stream(0)
[  269.463012] ov9655 1-0030: OV9655 read register 09 : 13
[  269.472808] ov9655 1-0030: ov9655_set_power on=0
[  269.478302] ov9655 1-0030: __ov9655_set_power on=0


somewhere here I did a rmmod omap3_isp
and a insmod omap3_isp.ko

[  289.968658] omap3isp 480bc000.isp: ignoring dependency for device, assuming no driver
[  289.978820] omap3isp 480bc000.isp: 480bc000.isp supply vdd-csiphy1 not found, using dummy regulator
[  289.989685] omap3isp 480bc000.isp: 480bc000.isp supply vdd-csiphy2 not found, using dummy regulator
[  290.000122] omap3isp 480bc000.isp: Revision 15.0 found
[  290.006744] omap-iommu 480bd400.mmu: 480bd400.mmu: version 1.1
[  290.013275] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP CCP2 was not initialized!
[  290.028350] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP CSI2a was not initialized!
[  290.044677] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP CCDC was not initialized!
[  290.064910] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP preview was not initialized!
[  290.090057] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP resizer was not initialized!
[  290.109313] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP AEWB was not initialized!
[  290.128784] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP AF was not initialized!
[  290.148559] omap3isp 480bc000.isp: Entity type for entity OMAP3 ISP histogram was not initialized!
[  290.168395] ov9655 1-0030: __ov9655_set_power on=1
[  290.223907] ov9655 1-0030: Failed to enable clock (-6)
<-- probably the interesting root cause for further problems.


[  290.294067] ov9655 1-0030: OV9655 read register 1c : ffffff87
[  290.300415] ov9655 1-0030: OV9655 read register 1d : ffffff87
[  290.307434] ov9655 1-0030: OV9655 not detected, can't read manufacturer id

oh, no camera anymore, probably because of no clock?

[  290.316131] ov9655 1-0030: __ov9655_set_power on=0
[  290.321289] ------------[ cut here ]------------

probably error handling needs to be cleaned up even more.

[  290.326141] WARNING: CPU: 0 PID: 7192 at /home/andi/gta04/gta04-kernel/drivers/clk/clk.c:828 clk_core_disable_lock+0x18/0x24
[  290.337860] cam_xclka already disabled
[  290.341796] Modules linked in: omap3_isp(+) videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_common bnep ipv6 usb_f_ecm g_ether usb_f_rndis u_ether libcomposite configfs akbikepower dm_crypt dm_mod dax libertas_sdio libertas cfg80211 snd_soc_simple_card snd_soc_simple_card_utils snd_soc_omap_twl4030 snd_soc_gtm601 wwan_on_off generic_adc_battery bmp280_spi ov9655 v4l2_fwnode v4l2_common hci_uart bmp280_i2c bmp280 videodev itg3200 at24 hmc5843_i2c bma180 leds_tca6507 tsc2007 hmc5843_core industrialio_triggered_buffer media kfifo_buf snd_soc_omap_mcbsp snd_soc_sdma bluetooth gnss_sirf snd_soc_twl4030 ecdh_generic twl4030_vibra w2cbw003_bluetooth gnss ehci_omap [last unloaded: omap3_isp]
[  290.406646] CPU: 0 PID: 7192 Comm: insmod Not tainted 4.20.0-ak+ #2
[  290.413177] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[  290.419769] [<c0110ebc>] (unwind_backtrace) from [<c010bf60>] (show_stack+0x10/0x14)
[  290.427886] [<c010bf60>] (show_stack) from [<c081a92c>] (dump_stack+0x7c/0x98)
[  290.435455] [<c081a92c>] (dump_stack) from [<c01323ec>] (__warn+0xdc/0xfc)
[  290.442657] [<c01323ec>] (__warn) from [<c0132450>] (warn_slowpath_fmt+0x44/0x6c)
[  290.450500] [<c0132450>] (warn_slowpath_fmt) from [<c04a80c8>] (clk_core_disable_lock+0x18/0x24)
[  290.459716] [<c04a80c8>] (clk_core_disable_lock) from [<bf17d28c>] (__ov9655_set_power+0x104/0x12c [ov9655])
[  290.470062] [<bf17d28c>] (__ov9655_set_power [ov9655]) from [<bf17d324>] (ov9655_registered+0x70/0x120 [ov9655])
[  290.480804] [<bf17d324>] (ov9655_registered [ov9655]) from [<bf119658>] (v4l2_device_register_subdev+0x134/0x158 [videodev])
[  290.492614] [<bf119658>] (v4l2_device_register_subdev [videodev]) from [<bf12403c>] (v4l2_async_match_notify+0x1c/0xe4 [videodev])
[  290.504974] [<bf12403c>] (v4l2_async_match_notify [videodev]) from [<bf124010>] (v4l2_async_notifier_try_all_subdevs+0x78/0x88 [videodev])
[  290.518096] [<bf124010>] (v4l2_async_notifier_try_all_subdevs [videodev]) from [<bf124294>] (__v4l2_async_notifier_register+0x4c/0xf8 [videodev])
[  290.531860] [<bf124294>] (__v4l2_async_notifier_register [videodev]) from [<bf12438c>] (v4l2_async_notifier_register+0x4c/0x5c [videodev])
[  290.545074] [<bf12438c>] (v4l2_async_notifier_register [videodev]) from [<bf46e318>] (isp_probe+0xaa8/0xb9c [omap3_isp])
[  290.556549] [<bf46e318>] (isp_probe [omap3_isp]) from [<c05657e8>] (platform_drv_probe+0x48/0x94)
[  290.565856] [<c05657e8>] (platform_drv_probe) from [<c0563a70>] (really_probe+0x1f0/0x2c0)
[  290.574523] [<c0563a70>] (really_probe) from [<c0563dc8>] (driver_probe_device+0x140/0x158)
[  290.583282] [<c0563dc8>] (driver_probe_device) from [<c0563e6c>] (__driver_attach+0x8c/0xc8)
[  290.592132] [<c0563e6c>] (__driver_attach) from [<c05620b4>] (bus_for_each_dev+0x64/0xa0)
[  290.600738] [<c05620b4>] (bus_for_each_dev) from [<c056300c>] (bus_add_driver+0x170/0x1d8)
[  290.609405] [<c056300c>] (bus_add_driver) from [<c0564a98>] (driver_register+0xb4/0xf8)
[  290.617828] [<c0564a98>] (driver_register) from [<c0102e84>] (do_one_initcall+0xbc/0x264)
[  290.626434] [<c0102e84>] (do_one_initcall) from [<c01aeabc>] (do_init_module+0x58/0x1c8)
[  290.634887] [<c01aeabc>] (do_init_module) from [<c01ad7fc>] (load_module+0x1940/0x1fc4)
[  290.643310] [<c01ad7fc>] (load_module) from [<c01ae084>] (sys_finit_module+0x94/0xb4)
[  290.651519] [<c01ae084>] (sys_finit_module) from [<c0101000>] (ret_fast_syscall+0x0/0x54)
[  290.660095] Exception stack(0xd68f1fa8 to 0xd68f1ff0)
[  290.665405] 1fa0:                   20525a00 00442cdc 00000003 00446e80 00000000 00000002
[  290.673980] 1fc0: 20525a00 00442cdc b6fd9f10 0000017b 00000000 00442cdc 00459000 00000000
[  290.682556] 1fe0: beb52bc0 beb52bb0 0043d6c3 b6f42b42
[  290.687835] ---[ end trace e20f49b3c44382a9 ]---
[  290.700622] ------------[ cut here ]------------
[  290.710845] WARNING: CPU: 0 PID: 7192 at /home/andi/gta04/gta04-kernel/drivers/clk/clk.c:687 clk_unprepare+0x24/0x2c
[  290.730957] cam_xclka already unprepared
[  290.738922] Modules linked in: omap3_isp(+) videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_common bnep ipv6 usb_f_ecm g_ether usb_f_rndis u_ether libcomposite configfs akbikepower dm_crypt dm_mod dax libertas_sdio libertas cfg80211 snd_soc_simple_card snd_soc_simple_card_utils snd_soc_omap_twl4030 snd_soc_gtm601 wwan_on_off generic_adc_battery bmp280_spi ov9655 v4l2_fwnode v4l2_common hci_uart bmp280_i2c bmp280 videodev itg3200 at24 hmc5843_i2c bma180 leds_tca6507 tsc2007 hmc5843_core industrialio_triggered_buffer media kfifo_buf snd_soc_omap_mcbsp snd_soc_sdma bluetooth gnss_sirf snd_soc_twl4030 ecdh_generic twl4030_vibra w2cbw003_bluetooth gnss ehci_omap [last unloaded: omap3_isp]
[  290.805053] CPU: 0 PID: 7192 Comm: insmod Tainted: G        W         4.20.0-ak+ #2
[  290.813079] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[  290.819671] [<c0110ebc>] (unwind_backtrace) from [<c010bf60>] (show_stack+0x10/0x14)
[  290.827789] [<c010bf60>] (show_stack) from [<c081a92c>] (dump_stack+0x7c/0x98)
[  290.835357] [<c081a92c>] (dump_stack) from [<c01323ec>] (__warn+0xdc/0xfc)
[  290.842590] [<c01323ec>] (__warn) from [<c0132450>] (warn_slowpath_fmt+0x44/0x6c)
[  290.850433] [<c0132450>] (warn_slowpath_fmt) from [<c04a82a0>] (clk_unprepare+0x24/0x2c)
[  290.858917] [<c04a82a0>] (clk_unprepare) from [<bf17d294>] (__ov9655_set_power+0x10c/0x12c [ov9655])
[  290.868530] [<bf17d294>] (__ov9655_set_power [ov9655]) from [<bf17d324>] (ov9655_registered+0x70/0x120 [ov9655])
[  290.879302] [<bf17d324>] (ov9655_registered [ov9655]) from [<bf119658>] (v4l2_device_register_subdev+0x134/0x158 [videodev])
[  290.891174] [<bf119658>] (v4l2_device_register_subdev [videodev]) from [<bf12403c>] (v4l2_async_match_notify+0x1c/0xe4 [videodev])
[  290.903533] [<bf12403c>] (v4l2_async_match_notify [videodev]) from [<bf124010>] (v4l2_async_notifier_try_all_subdevs+0x78/0x88 [videodev])
[  290.916656] [<bf124010>] (v4l2_async_notifier_try_all_subdevs [videodev]) from [<bf124294>] (__v4l2_async_notifier_register+0x4c/0xf8 [videodev])
[  290.930419] [<bf124294>] (__v4l2_async_notifier_register [videodev]) from [<bf12438c>] (v4l2_async_notifier_register+0x4c/0x5c [videodev])
[  290.943634] [<bf12438c>] (v4l2_async_notifier_register [videodev]) from [<bf46e318>] (isp_probe+0xaa8/0xb9c [omap3_isp])
[  290.955078] [<bf46e318>] (isp_probe [omap3_isp]) from [<c05657e8>] (platform_drv_probe+0x48/0x94)
[  290.964416] [<c05657e8>] (platform_drv_probe) from [<c0563a70>] (really_probe+0x1f0/0x2c0)
[  290.973083] [<c0563a70>] (really_probe) from [<c0563dc8>] (driver_probe_device+0x140/0x158)
[  290.981811] [<c0563dc8>] (driver_probe_device) from [<c0563e6c>] (__driver_attach+0x8c/0xc8)
[  290.990661] [<c0563e6c>] (__driver_attach) from [<c05620b4>] (bus_for_each_dev+0x64/0xa0)
[  290.999267] [<c05620b4>] (bus_for_each_dev) from [<c056300c>] (bus_add_driver+0x170/0x1d8)
[  291.007934] [<c056300c>] (bus_add_driver) from [<c0564a98>] (driver_register+0xb4/0xf8)
[  291.016326] [<c0564a98>] (driver_register) from [<c0102e84>] (do_one_initcall+0xbc/0x264)
[  291.024871] [<c0102e84>] (do_one_initcall) from [<c01aeabc>] (do_init_module+0x58/0x1c8)
[  291.033325] [<c01aeabc>] (do_init_module) from [<c01ad7fc>] (load_module+0x1940/0x1fc4)
[  291.041717] [<c01ad7fc>] (load_module) from [<c01ae084>] (sys_finit_module+0x94/0xb4)
[  291.049896] [<c01ae084>] (sys_finit_module) from [<c0101000>] (ret_fast_syscall+0x0/0x54)
[  291.058471] Exception stack(0xd68f1fa8 to 0xd68f1ff0)
[  291.063751] 1fa0:                   20525a00 00442cdc 00000003 00446e80 00000000 00000002
[  291.072326] 1fc0: 20525a00 00442cdc b6fd9f10 0000017b 00000000 00442cdc 00459000 00000000
[  291.080902] 1fe0: beb52bc0 beb52bb0 0043d6c3 b6f42b42
[  291.096008] ---[ end trace e20f49b3c44382aa ]---
[  291.100891] ------------[ cut here ]------------
[  291.106506] WARNING: CPU: 0 PID: 7192 at /home/andi/gta04/gta04-kernel/drivers/regulator/core.c:2340 _regulator_disable+0x2c/0x110
[  291.119750] unbalanced disables for VAUX3
[  291.124542] Modules linked in: omap3_isp(+) videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_common bnep ipv6 usb_f_ecm g_ether usb_f_rndis u_ether libcomposite configfs akbikepower dm_crypt dm_mod dax libertas_sdio libertas cfg80211 snd_soc_simple_card snd_soc_simple_card_utils snd_soc_omap_twl4030 snd_soc_gtm601 wwan_on_off generic_adc_battery bmp280_spi ov9655 v4l2_fwnode v4l2_common hci_uart bmp280_i2c bmp280 videodev itg3200 at24 hmc5843_i2c bma180 leds_tca6507 tsc2007 hmc5843_core industrialio_triggered_buffer media kfifo_buf snd_soc_omap_mcbsp snd_soc_sdma bluetooth gnss_sirf snd_soc_twl4030 ecdh_generic twl4030_vibra w2cbw003_bluetooth gnss ehci_omap [last unloaded: omap3_isp]
[  291.202789] CPU: 0 PID: 7192 Comm: insmod Tainted: G        W         4.20.0-ak+ #2
[  291.210815] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[  291.217437] [<c0110ebc>] (unwind_backtrace) from [<c010bf60>] (show_stack+0x10/0x14)
[  291.225555] [<c010bf60>] (show_stack) from [<c081a92c>] (dump_stack+0x7c/0x98)
[  291.233093] [<c081a92c>] (dump_stack) from [<c01323ec>] (__warn+0xdc/0xfc)
[  291.240295] [<c01323ec>] (__warn) from [<c0132450>] (warn_slowpath_fmt+0x44/0x6c)
[  291.248138] [<c0132450>] (warn_slowpath_fmt) from [<c04c6674>] (_regulator_disable+0x2c/0x110)
[  291.257171] [<c04c6674>] (_regulator_disable) from [<c04c678c>] (regulator_disable+0x34/0x5c)
[  291.266113] [<c04c678c>] (regulator_disable) from [<c04c7988>] (regulator_bulk_disable+0x38/0xa0)
[  291.275421] [<c04c7988>] (regulator_bulk_disable) from [<bf17d2a0>] (__ov9655_set_power+0x118/0x12c [ov9655])
[  291.285797] [<bf17d2a0>] (__ov9655_set_power [ov9655]) from [<bf17d324>] (ov9655_registered+0x70/0x120 [ov9655])
[  291.296569] [<bf17d324>] (ov9655_registered [ov9655]) from [<bf119658>] (v4l2_device_register_subdev+0x134/0x158 [videodev])
[  291.308380] [<bf119658>] (v4l2_device_register_subdev [videodev]) from [<bf12403c>] (v4l2_async_match_notify+0x1c/0xe4 [videodev])
[  291.320770] [<bf12403c>] (v4l2_async_match_notify [videodev]) from [<bf124010>] (v4l2_async_notifier_try_all_subdevs+0x78/0x88 [videodev])
[  291.333862] [<bf124010>] (v4l2_async_notifier_try_all_subdevs [videodev]) from [<bf124294>] (__v4l2_async_notifier_register+0x4c/0xf8 [videodev])
[  291.347595] [<bf124294>] (__v4l2_async_notifier_register [videodev]) from [<bf12438c>] (v4l2_async_notifier_register+0x4c/0x5c [videodev])
[  291.360778] [<bf12438c>] (v4l2_async_notifier_register [videodev]) from [<bf46e318>] (isp_probe+0xaa8/0xb9c [omap3_isp])
[  291.372222] [<bf46e318>] (isp_probe [omap3_isp]) from [<c05657e8>] (platform_drv_probe+0x48/0x94)
[  291.381500] [<c05657e8>] (platform_drv_probe) from [<c0563a70>] (really_probe+0x1f0/0x2c0)
[  291.390136] [<c0563a70>] (really_probe) from [<c0563dc8>] (driver_probe_device+0x140/0x158)
[  291.398895] [<c0563dc8>] (driver_probe_device) from [<c0563e6c>] (__driver_attach+0x8c/0xc8)
[  291.407714] [<c0563e6c>] (__driver_attach) from [<c05620b4>] (bus_for_each_dev+0x64/0xa0)
[  291.416290] [<c05620b4>] (bus_for_each_dev) from [<c056300c>] (bus_add_driver+0x170/0x1d8)
[  291.424957] [<c056300c>] (bus_add_driver) from [<c0564a98>] (driver_register+0xb4/0xf8)
[  291.433319] [<c0564a98>] (driver_register) from [<c0102e84>] (do_one_initcall+0xbc/0x264)
[  291.441894] [<c0102e84>] (do_one_initcall) from [<c01aeabc>] (do_init_module+0x58/0x1c8)
[  291.450347] [<c01aeabc>] (do_init_module) from [<c01ad7fc>] (load_module+0x1940/0x1fc4)
[  291.458740] [<c01ad7fc>] (load_module) from [<c01ae084>] (sys_finit_module+0x94/0xb4)
[  291.466918] [<c01ae084>] (sys_finit_module) from [<c0101000>] (ret_fast_syscall+0x0/0x54)
[  291.475494] Exception stack(0xd68f1fa8 to 0xd68f1ff0)
[  291.480804] 1fa0:                   20525a00 00442cdc 00000003 00446e80 00000000 00000002
[  291.489349] 1fc0: 20525a00 00442cdc b6fd9f10 0000017b 00000000 00442cdc 00459000 00000000
[  291.497894] 1fe0: beb52bc0 beb52bb0 0043d6c3 b6f42b42
[  291.573822] ---[ end trace e20f49b3c44382ab ]---
[  291.578674] Failed to disable avdd: -5


with my patch, things are even worse. There I do it not even get
working once.

Regards,
Andreas
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