Currently, when an EOF IRQ is received, it generates two messages:

	[   59.191893] atomisp-isp2 0000:00:03.0: irq:0x200000
	[   59.191913] atomisp-isp2 0000:00:03.0: atomisp_isr EOF exp_id 142, asd 0

Flooding the dmesg with lots of messages per second. The same
pattern happens for all other IRQs.

Change the logic for printing just one message per IRQ and
rate-limit those, as, for debugging purposes, it is usually
interesting to know that IRQs are being received, but not
displaying every single one.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This is not used anywhere. So, let's trash it.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The code under load_primary_binaries() is complex and
were hard to understand, because it used to have lots
of ifdefs and broken identation.

The patch which cleaned it and removed the version-specific
ifdefs added a regression.

Solve it.

Fixes: 3c0538fb ("media: atomisp: get rid of most checks for ISP2401 version")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The media bus formats to be used on serial busses are documented but there
was no reference from CSI-2 documentation. Add that now.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.

Also, notice that, dynamic memory allocations won't be affected by
this change:

"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]

sizeof(flexible-array-member) triggers a warning because flexible array
members have incomplete type[1]. There are some instances of code in
which the sizeof operator is being incorrectly/erroneously applied to
zero-length arrays and the result is zero. Such instances may be hiding
some bugs. So, this work (flexible-array member conversions) will also
help to get completely rid of those sorts of issues.

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732 ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The IMX219 camera driver is not a clock provider, but merely a clock
consumer, and thus does not need to include <linux/clk-provider.h> and
<linux/clkdev.h>.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

OminiVision ov2740 is a 2 megapixels RAW RGB image sensor which can
deliver 1920x1080@60fps frames. This driver add the support of
vertical blanking, exposure, test pattern, digital and analog gain
control for sensor.
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Shawn Tu <shawnx.tu@intel.com>
Signed-off-by: Qiu, Tianshu <tian.shu.qiu@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Query the sensor for its module revision, and compare it
to known revisions.

Currently 2A and 1B revision indentification is supported.

[Sakari Ailus: Wrap a line over 80, alignment, use %u for printing u32]
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Add match table, enable ov8856_probe() to support
both ACPI and DT modes.

ACPI and DT modes are primarily distinguished from
by checking for ACPI mode and by having resource like
be NULL.
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This patch adds documentation of device tree in YAML schema for the
OV8856 CMOS image sensor.
Signed-off-by: Dongchun Zhu <dongchun.zhu@mediatek.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Terratec Cinergy S2 PCIe Dual is a PCIe device with two tuners that
actually contains two USB devices. The devices are visible in the
lsusb printout.

Bus 004 Device 002: ID 153b:1182 TerraTec Electronic GmbH Cinergy S2 PCIe Dual Port 2
Bus 003 Device 002: ID 153b:1181 TerraTec Electronic GmbH Cinergy S2 PCIe Dual Port 1

The devices use the Montage M88DS3000/M88TS2022 demod/tuner.
Signed-off-by: Dirk Nehring <dnehring@gmx.net>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Fixes bug exposed by:

[a3fbc2e6: media: mc-entity.c: use WARN_ON, validate link pads]

The dvbdev incorrectly requests a tuner sink pad to connect to a demux
sink pad. The media controller failure percolates back and the dvb device
creation fails. Fix this by requesting a tuner source pad. Instead of
forcing that pad to be index zero, check if a negative integer error
is returned. A note is added that first source pad found is chosen.

Affected bridges cx231xx and em28xx printed the below warning[s]
when a variety of media controller dvb enabled devices were connected.
The warning returns an error causing all affected devices to fail DVB
device creation.

[  253.138332] ------------[ cut here ]------------
[  253.138339] WARNING: CPU: 0 PID: 1550 at drivers/media/mc/mc-entity.c:669 media_create_pad_link+0x1e0/0x200 [mc]
[  253.138339] Modules linked in: si2168 em28xx_dvb(+) em28xx si2157 lgdt3306a cx231xx_dvb dvb_core cx231xx_alsa cx25840 cx231xx tveeprom cx2341x i2c_mux videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc ir_rc5_decoder rc_hauppauge mceusb rc_core eda
c_mce_amd kvm nls_iso8859_1 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd glue_helper efi_pstore wmi_bmof k10temp asix usbnet mii nouveau snd_hda_codec_realtek snd_hda_codec_generic input_leds ledtrig_audio snd_hda_codec_hdmi mxm_wmi snd_hda_in
tel video snd_intel_dspcfg ttm snd_hda_codec drm_kms_helper snd_hda_core drm snd_hwdep snd_seq_midi snd_seq_midi_event i2c_algo_bit snd_pcm snd_rawmidi fb_sys_fops snd_seq syscopyarea sysfillrect snd_seq_device sysimgblt snd_timer snd soundcore ccp mac_hid sch_fq_codel parport_p
c ppdev lp parport ip_tables x_tables autofs4 vfio_pci irqbypass vfio_virqfd vfio_iommu_type1 vfio hid_generic usbhid hid i2c_piix4 ahci libahci wmi gpio_amdpt
[  253.138370]  gpio_generic
[  253.138372] CPU: 0 PID: 1550 Comm: modprobe Tainted: G        W         5.7.0-rc2+ #181
[  253.138373] Hardware name: MSI MS-7A39/B350M GAMING PRO (MS-7A39), BIOS 2.G0 04/27/2018
[  253.138376] RIP: 0010:media_create_pad_link+0x1e0/0x200 [mc]
[  253.138378] Code: 26 fd ff ff 44 8b 4d d0 eb d9 0f 0b 41 b9 ea ff ff ff 44 89 c8 c3 0f 0b 41 b9 ea ff ff ff eb f2 0f 0b 41 b9 ea ff ff ff eb e8 <0f> 0b 41 b9 ea ff ff ff eb af 0f 0b 41 b9 ea ff ff ff eb a5 66 90
[  253.138379] RSP: 0018:ffffb9ecc0ee7a78 EFLAGS: 00010246
[  253.138380] RAX: ffff943f706c99d8 RBX: 0000000000000000 RCX: 0000000000000000
[  253.138381] RDX: ffff943f613e0180 RSI: 0000000000000000 RDI: ffff943f706c9958
[  253.138381] RBP: ffffb9ecc0ee7ab0 R08: 0000000000000001 R09: ffff943f613e0180
[  253.138382] R10: ffff943f613e0180 R11: ffff943f706c9400 R12: 0000000000000000
[  253.138383] R13: 0000000000000001 R14: ffff943f706c9958 R15: 0000000000000001
[  253.138384] FS:  00007f3cd29ba540(0000) GS:ffff943f8ec00000(0000) knlGS:0000000000000000
[  253.138385] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  253.138385] CR2: 000055f7de0ca830 CR3: 00000003dd208000 CR4: 00000000003406f0
[  253.138386] Call Trace:
[  253.138392]  media_create_pad_links+0x104/0x1b0 [mc]
[  253.138397]  dvb_create_media_graph+0x350/0x5f0 [dvb_core]
[  253.138402]  em28xx_dvb_init+0x5ea/0x2600 [em28xx_dvb]
[  253.138408]  em28xx_register_extension+0x63/0xc0 [em28xx]
[  253.138410]  ? 0xffffffffc039c000
[  253.138412]  em28xx_dvb_register+0x15/0x1000 [em28xx_dvb]
[  253.138416]  do_one_initcall+0x71/0x250
[  253.138418]  ? do_init_module+0x27/0x22e
[  253.138421]  ? _cond_resched+0x1a/0x50
[  253.138423]  ? kmem_cache_alloc_trace+0x1ec/0x270
[  253.138425]  ? __vunmap+0x1e3/0x240
[  253.138427]  do_init_module+0x5f/0x22e
[  253.138430]  load_module+0x2525/0x2d40
[  253.138436]  __do_sys_finit_module+0xe5/0x120
[  253.138438]  ? __do_sys_finit_module+0xe5/0x120
[  253.138442]  __x64_sys_finit_module+0x1a/0x20
[  253.138443]  do_syscall_64+0x57/0x1b0
[  253.138445]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  253.138446] RIP: 0033:0x7f3cd24dc839
[  253.138448] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
[  253.138449] RSP: 002b:00007ffe4fc514d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  253.138450] RAX: ffffffffffffffda RBX: 000055a9237f63f0 RCX: 00007f3cd24dc839
[  253.138451] RDX: 0000000000000000 RSI: 000055a922c3ad2e RDI: 0000000000000000
[  253.138451] RBP: 000055a922c3ad2e R08: 0000000000000000 R09: 0000000000000000
[  253.138452] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[  253.138453] R13: 000055a9237f5550 R14: 0000000000040000 R15: 000055a9237f63f0
[  253.138456] ---[ end trace a60f19c54aa96ec4 ]---

[  234.915628] ------------[ cut here ]------------
[  234.915640] WARNING: CPU: 0 PID: 1502 at drivers/media/mc/mc-entity.c:669 media_create_pad_link+0x1e0/0x200 [mc]
[  234.915641] Modules linked in: si2157 lgdt3306a cx231xx_dvb(+) dvb_core cx231xx_alsa cx25840 cx231xx tveeprom cx2341x i2c_mux videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc ir_rc5_decoder rc_hauppauge mceusb rc_core edac_mce_amd kvm nls_iso8859
_1 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd glue_helper efi_pstore wmi_bmof k10temp asix usbnet mii nouveau snd_hda_codec_realtek snd_hda_codec_generic input_leds ledtrig_audio snd_hda_codec_hdmi mxm_wmi snd_hda_intel video snd_intel_dspcf
g ttm snd_hda_codec drm_kms_helper snd_hda_core drm snd_hwdep snd_seq_midi snd_seq_midi_event i2c_algo_bit snd_pcm snd_rawmidi fb_sys_fops snd_seq syscopyarea sysfillrect snd_seq_device sysimgblt snd_timer snd soundcore ccp mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tab
les x_tables autofs4 vfio_pci irqbypass vfio_virqfd vfio_iommu_type1 vfio hid_generic usbhid hid i2c_piix4 ahci libahci wmi gpio_amdpt gpio_generic
[  234.915700] CPU: 0 PID: 1502 Comm: modprobe Not tainted 5.7.0-rc2+ #181
[  234.915702] Hardware name: MSI MS-7A39/B350M GAMING PRO (MS-7A39), BIOS 2.G0 04/27/2018
[  234.915709] RIP: 0010:media_create_pad_link+0x1e0/0x200 [mc]
[  234.915712] Code: 26 fd ff ff 44 8b 4d d0 eb d9 0f 0b 41 b9 ea ff ff ff 44 89 c8 c3 0f 0b 41 b9 ea ff ff ff eb f2 0f 0b 41 b9 ea ff ff ff eb e8 <0f> 0b 41 b9 ea ff ff ff eb af 0f 0b 41 b9 ea ff ff ff eb a5 66 90
[  234.915714] RSP: 0018:ffffb9ecc1b6fa50 EFLAGS: 00010246
[  234.915717] RAX: ffff943f8c94a9d8 RBX: 0000000000000000 RCX: 0000000000000000
[  234.915719] RDX: ffff943f613e0900 RSI: 0000000000000000 RDI: ffff943f8c94a958
[  234.915721] RBP: ffffb9ecc1b6fa88 R08: 0000000000000001 R09: ffff943f613e0900
[  234.915723] R10: ffff943f613e0900 R11: ffff943f6b590c00 R12: 0000000000000000
[  234.915724] R13: 0000000000000001 R14: ffff943f8c94a958 R15: 0000000000000001
[  234.915727] FS:  00007f4ca3646540(0000) GS:ffff943f8ec00000(0000) knlGS:0000000000000000
[  234.915729] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  234.915731] CR2: 00007fff7a53ba18 CR3: 00000003da614000 CR4: 00000000003406f0
[  234.915733] Call Trace:
[  234.915745]  media_create_pad_links+0x104/0x1b0 [mc]
[  234.915756]  dvb_create_media_graph+0x350/0x5f0 [dvb_core]
[  234.915766]  dvb_init.part.4+0x691/0x1360 [cx231xx_dvb]
[  234.915780]  dvb_init+0x1a/0x20 [cx231xx_dvb]
[  234.915787]  cx231xx_register_extension+0x71/0xa0 [cx231xx]
[  234.915791]  ? 0xffffffffc042f000
[  234.915796]  cx231xx_dvb_register+0x15/0x1000 [cx231xx_dvb]
[  234.915802]  do_one_initcall+0x71/0x250
[  234.915807]  ? do_init_module+0x27/0x22e
[  234.915811]  ? _cond_resched+0x1a/0x50
[  234.915816]  ? kmem_cache_alloc_trace+0x1ec/0x270
[  234.915820]  ? __vunmap+0x1e3/0x240
[  234.915826]  do_init_module+0x5f/0x22e
[  234.915831]  load_module+0x2525/0x2d40
[  234.915848]  __do_sys_finit_module+0xe5/0x120
[  234.915850]  ? __do_sys_finit_module+0xe5/0x120
[  234.915862]  __x64_sys_finit_module+0x1a/0x20
[  234.915865]  do_syscall_64+0x57/0x1b0
[  234.915870]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  234.915872] RIP: 0033:0x7f4ca3168839
[  234.915876] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
[  234.915878] RSP: 002b:00007ffcea3db3b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  234.915881] RAX: ffffffffffffffda RBX: 000055af22c29340 RCX: 00007f4ca3168839
[  234.915882] RDX: 0000000000000000 RSI: 000055af22c38390 RDI: 0000000000000001
[  234.915884] RBP: 000055af22c38390 R08: 0000000000000000 R09: 0000000000000000
[  234.915885] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
[  234.915887] R13: 000055af22c29060 R14: 0000000000040000 R15: 0000000000000000
[  234.915896] ---[ end trace a60f19c54aa96ec3 ]---
Signed-off-by: Brad Love <brad@nextdimension.cc>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Move phy-rockchip-dphy-rx0 bindings to Documentation/devicetree/bindings/phy

Verified with:
make ARCH=arm64 dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/phy/rockchip-mipi-dphy-rx0.yaml
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

reg property is not used in Rockchip MIPI DPHY RX0 bindings, thus remove
it.
Suggested-by: Johan Jonker <jbx6244@gmail.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Based on Yocto Aero's repository, the file name for the isp2401
is the same for the B0 release.

So, unify it at the driver.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The TODO list doesn't reflect the current status of the driver.

Update it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

When checking sh_css.c against the Yocto Aero's version, it can
be noticed that some isp2401 dependencies may have been taken
wrongly.

Change the code to work like the Yocto Aero, as this driver
was tested in the past with an ISP2401 device.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Depending on the ISP-specific HAS_NO_INPUT_FORMATTER macro,
some IRQs will be ignored by the driver. Yet, those keep
happening, as reported by this debug print:

	[   61.620746] atomisp-isp2 0000:00:03.0: atomisp_css_irq_enable: css irq info 0x00000004: disable.

Causing this warning:
	[   61.620749] atomisp-isp2 0000:00:03.0: atomisp_css_irq_enable:Invalid irq info.

Well, if this is a normal situation, just ignore it without
warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Add a debug printk to show what IRQ is popping up.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Instead of using it only if system memory is below 2GB,
don't use it at all. The problem is that the code there is not
compatible anymore with modern Kernels:

[  179.552797] virt_to_cache: Object is not a Slab page!
[  179.552821] WARNING: CPU: 0 PID: 1414 at mm/slab.h:475 cache_from_obj+0xab/0xf0
[  179.552824] Modules linked in: ccm(E) nft_fib_inet(E) nft_fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) nft_reject_inet(E) nf_reject_ipv4(E) nf_reject_ipv6(E) nft_reject(E) nft_ct(E) nft_chain_nat(E) ip6table_nat(E) ip6table_mangle(E) ip6table_raw(E) ip6table_security(E) iptable_nat(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) libcrc32c(E) nf_defrag_ipv4(E) iptable_mangle(E) iptable_raw(E) iptable_security(E) ip_set(E) nf_tables(E) nfnetlink(E) ip6table_filter(E) ip6_tables(E) iptable_filter(E) cmac(E) bnep(E) sunrpc(E) vfat(E) fat(E) mei_hdcp(E) snd_soc_sst_cht_bsw_rt5645(E) gpio_keys(E) intel_rapl_msr(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) asus_nb_wmi(E) ath10k_pci(E) ghash_clmulni_intel(E) ath10k_core(E) intel_cstate(E) wdat_wdt(E) pcspkr(E) ath(E) mac80211(E) intel_chtdc_ti_pwrbtn(E) joydev(E) btusb(E) btrtl(E) btbcm(E) btintel(E) libarc4(E) bluetooth(E) cfg80211(E) ecdh_generic(E) ecc(E) mei_txe(E) mei(E) lpc_ich(E)
[  179.552887]  hid_sensor_accel_3d(E) hid_sensor_gyro_3d(E) hid_sensor_trigger(E) hid_sensor_iio_common(E) industrialio_triggered_buffer(E) kfifo_buf(E) industrialio(E) atomisp_ov2680(CE) snd_soc_rt5645(E) snd_intel_sst_acpi(E) snd_soc_rl6231(E) snd_intel_sst_core(E) snd_soc_sst_atom_hifi2_platform(E) intel_hid(E) snd_soc_acpi_intel_match(E) spi_pxa2xx_platform(E) snd_soc_acpi(E) snd_soc_core(E) snd_compress(E) dw_dmac(E) snd_hdmi_lpe_audio(E) int3400_thermal(E) int3406_thermal(E) snd_seq(E) acpi_thermal_rel(E) int3403_thermal(E) atomisp(CE) snd_seq_device(E) snd_pcm(E) intel_int0002_vgpio(E) soc_button_array(E) acpi_pad(E) intel_xhci_usb_role_switch(E) snd_timer(E) videobuf_vmalloc(E) videobuf_core(E) snd(E) atomisp_gmin_platform(CE) soundcore(E) videodev(E) processor_thermal_device(E) intel_soc_dts_iosf(E) mc(E) intel_rapl_common(E) int340x_thermal_zone(E) ip_tables(E) hid_sensor_hub(E) intel_ishtp_loader(E) intel_ishtp_hid(E) mmc_block(E) hid_multitouch(E) crc32c_intel(E) i915(E)
[  179.552936]  hid_asus(E) i2c_algo_bit(E) asus_wmi(E) sparse_keymap(E) rfkill(E) drm_kms_helper(E) intel_ish_ipc(E) intel_ishtp(E) drm(E) wmi(E) video(E) i2c_hid(E) pwm_lpss_platform(E) pwm_lpss(E) sdhci_acpi(E) sdhci(E) mmc_core(E) fuse(E)
[  179.552961] CPU: 0 PID: 1414 Comm: v4l2grab Tainted: G         C  EL    5.7.0-rc2+ #42
[  179.552963] Hardware name: ASUSTeK COMPUTER INC. T101HA/T101HA, BIOS T101HA.306 04/23/2019
[  179.552968] RIP: 0010:cache_from_obj+0xab/0xf0
[  179.552973] Code: c3 31 c0 80 3d 1c 38 72 01 00 75 f0 48 c7 c6 20 12 06 9f 48 c7 c7 10 f3 37 9f 48 89 04 24 c6 05 01 38 72 01 01 e8 2c 99 e0 ff <0f> 0b 48 8b 04 24 eb ca 48 8b 57 58 48 8b 48 58 48 c7 c6 30 12 06
[  179.552976] RSP: 0018:ffffaf1f00c3fae0 EFLAGS: 00010282
[  179.552980] RAX: 0000000000000029 RBX: 00000000000003ff RCX: 0000000000000007
[  179.552983] RDX: 00000000fffffff8 RSI: 0000000000000082 RDI: ffff9cb6bbc19cc0
[  179.552985] RBP: 0000000001000000 R08: 00000000000005a4 R09: ffffaf1f00c3f970
[  179.552988] R10: 0000000000000005 R11: 0000000000000000 R12: ffffffffc0713da0
[  179.552991] R13: ffff9cb5a7bb1000 R14: 0000000001000000 R15: ffff9cb5a7bb1000
[  179.552995] FS:  0000000000000000(0000) GS:ffff9cb6bbc00000(0000) knlGS:0000000000000000
[  179.552998] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  179.553000] CR2: 00007fe780544400 CR3: 000000002480a000 CR4: 00000000001006f0
[  179.553003] Call Trace:
[  179.553015]  kmem_cache_free+0x19/0x180
[  179.553070]  mmu_l2_unmap+0xd1/0x100 [atomisp]
[  179.553113]  ? __bo_merge+0x8f/0xa0 [atomisp]
[  179.553155]  mmu_unmap+0xd0/0xf0 [atomisp]
[  179.553198]  hmm_bo_unbind+0x62/0xb0 [atomisp]
[  179.553240]  hmm_free+0x44/0x60 [atomisp]
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Calling acpi_bus_get_device() may end allocating resources that
aren't freed. So, add a notice about that, as, if those drivers
get out of staging, we may need some changes.

Fixes: 0d64e942 ("media: atomisp: Add some ACPI detection info")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The memory management code for atomisp is complex: it has 2
extra pools (plus some ION-specific code).

The code for those extra pools are complex, and there are even
some parts of code over there that were forked from some
mm/ code, probably from Kernel 3.10.

Let's just use a single one, in order to make the driver
simpler.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Camera cannot be set on power off mode.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Instead of trying to send multiple bytes at the same time,
just go one by one, like the upstream driver does.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This isn't really used, so get rid, in order to make the code
simpler.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

There is an ov2680 driver mainstream. Use the read/write
routines from it, as the ones inside this driver are
generating some errors:

	ov2680 i2c-OVTI2680:00: ov2680_i2c_write: i2c write reg=0x3086, value 0x00, error -121

Maybe the code that changes from/to BE are not right.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Change some code at ov2680 for it to better report what's
happening there at sensor's level.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The sensor should finish its init before atomisp driver, as
otherwise the atomisp driver won't be able to talk with it.

So, we need to turn atomisp_gmin_platform into a module
again, for it to not depend on atomisp driver to finish
probing, and add some delay at atomisp to let the sensor
driver to finish probing.

Yeah, this is hacky. The real solution here would be to use
the async framework, but for now, our goal is to make the
driver to work. So, let's postpone such change to be done
later.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The current code causes ISP2401 to power down and never return
back to live, causing the driver to crash.

Fix it by commenting out the bad code. It should be noticed that
the Yocto Aero code has something similar to it.

Maybe the issue is related to an ISP bug (or maybe PM is
controlled on a different way for this hardware).
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The value returned by BIOS is 1. Fix it at the driver,
as it won't read this from EFI.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The mmu mapping logic uses a different logic depending on the
RAM size: if it is lower than 2GB, it uses kmem_cache_zalloc(),
but if memory is bigger than that, it uses its own way to
allocate memory.

Yet, when freeing, it uses kmem_cache_free() for any cases.

On recent Kernels, slab tracks the memory allocated on it,
with causes those warnings:

 virt_to_cache: Object is not a Slab page!
 WARNING: CPU: 0 PID: 758 at mm/slab.h:475 cache_from_obj+0xab/0xf0
 Modules linked in: snd_soc_sst_cht_bsw_rt5645(E) mei_hdcp(E) gpio_keys(E) intel_rapl_msr(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) atomisp_ov2680(CE) intel_cstate(E) asus_nb_wmi(E) wdat_wdt(E) pcspkr(E) ath10k_pci(E) ath10k_core(E) intel_chtdc_ti_pwrbtn(E) ath(E) mac80211(E) btusb(E) joydev(E) btrtl(E) btbcm(E) btintel(E) bluetooth(E) libarc4(E) ecdh_generic(E) cfg80211(E) ecc(E) hid_sensor_gyro_3d(E) hid_sensor_accel_3d(E) hid_sensor_trigger(E) hid_sensor_iio_common(E) industrialio_triggered_buffer(E) kfifo_buf(E) industrialio(E) atomisp(CE) videobuf_vmalloc(E) videobuf_core(E) videodev(E) mc(E) snd_soc_rt5645(E) snd_soc_rl6231(E) snd_intel_sst_acpi(E) snd_intel_sst_core(E) snd_soc_sst_atom_hifi2_platform(E) snd_soc_acpi_intel_match(E) intel_hid(E) spi_pxa2xx_platform(E) snd_soc_acpi(E) snd_soc_core(E) snd_compress(E) dw_dmac(E) intel_xhci_usb_role_switch(E) int3406_thermal(E)
  snd_hdmi_lpe_audio(E) int3403_thermal(E) int3400_thermal(E) acpi_thermal_rel(E) snd_seq(E) intel_int0002_vgpio(E) soc_button_array(E) snd_seq_device(E) acpi_pad(E) snd_pcm(E) snd_timer(E) snd(E) soundcore(E) lpc_ich(E) mei_txe(E) mei(E) processor_thermal_device(E) intel_soc_dts_iosf(E) intel_rapl_common(E) int340x_thermal_zone(E) ip_tables(E) hid_sensor_hub(E) intel_ishtp_loader(E) intel_ishtp_hid(E) mmc_block(E) hid_multitouch(E) crc32c_intel(E) i915(E) i2c_algo_bit(E) drm_kms_helper(E) hid_asus(E) asus_wmi(E) sparse_keymap(E) rfkill(E) drm(E) intel_ish_ipc(E) intel_ishtp(E) wmi(E) video(E) i2c_hid(E) sdhci_acpi(E) sdhci(E) mmc_core(E) pwm_lpss_platform(E) pwm_lpss(E) fuse(E)
 CPU: 0 PID: 758 Comm: v4l_id Tainted: G         C  E     5.7.0-rc2+ #40
 Hardware name: ASUSTeK COMPUTER INC. T101HA/T101HA, BIOS T101HA.306 04/23/2019
 RIP: 0010:cache_from_obj+0xab/0xf0
 Code: c3 31 c0 80 3d 1c 38 72 01 00 75 f0 48 c7 c6 20 12 06 b5 48 c7 c7 10 f3 37 b5 48 89 04 24 c6 05 01 38 72 01 01 e8 2c 99 e0 ff <0f> 0b 48 8b 04 24 eb ca 48 8b 57 58 48 8b 48 58 48 c7 c6 30 12 06
 RSP: 0018:ffffb0a4c07cfb10 EFLAGS: 00010282
 RAX: 0000000000000029 RBX: 0000000000000048 RCX: 0000000000000000
 RDX: ffffa004fbca5b80 RSI: ffffa004fbc19cc8 RDI: ffffa004fbc19cc8
 RBP: 0000000000c49000 R08: 00000000000004f7 R09: 0000000000000001
 R10: 0000000000aaaaaa R11: ffffffffb50e0600 R12: ffffffffc0be0a00
 R13: ffffa003f2448000 R14: 0000000000c49000 R15: ffffa003f2448000
 FS:  00007f9060c9cb80(0000) GS:ffffa004fbc00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000559fc55b8000 CR3: 0000000165b02000 CR4: 00000000001006f0
 Call Trace:
  kmem_cache_free+0x19/0x180
  mmu_l2_unmap+0xd1/0x100 [atomisp]
  mmu_unmap+0xd0/0xf0 [atomisp]
  hmm_bo_unbind+0x62/0xb0 [atomisp]
  hmm_free+0x44/0x60 [atomisp]
  ia_css_spctrl_unload_fw+0x30/0x50 [atomisp]
  ia_css_uninit+0x3a/0x90 [atomisp]
  atomisp_open+0x50b/0x5c0 [atomisp]
  v4l2_open+0x85/0xf0 [videodev]
  chrdev_open+0xdd/0x210
  ? cdev_device_add+0xc0/0xc0
  do_dentry_open+0x13a/0x380
  path_openat+0xa9a/0xfe0
  do_filp_open+0x75/0x100
  ? __check_object_size+0x12e/0x13c
  ? __alloc_fd+0x44/0x150
  do_sys_openat2+0x8a/0x130
  __x64_sys_openat+0x46/0x70
  do_syscall_64+0x5b/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Solve it by calling free_page() directly
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Simplify the hmm_bo a little bit by removing this
macro. This will avoid printing twice errors when
allocations happen.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Those files seem to be firmware-dependent, probably being used
by some debug interface.

Well, their contents are not really used by atomisp, so let's
just send them to the trash can, as it shouldn't have any
usage upstream.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

When changing the IFs to select isp2401 at runtime, one of
the conditions ended by being written wrong.

Code double-checked on both Yocto Aero's driver version and
against the previous code.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

There is an endif in the middle of a comment at
ia_css_xnr3.host.c. Remove it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Use the version from intel_atomisp2_pm.c for power up/down,
removing some code duplication and using just one kAPI call
for modifying the ISPSSPM0 register.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Changing to pci_enable_device() didn't produce the expected
result. It could also eventually led to problems when driver
is removed, due to object lifetime issues. So, let's just
return to the previous behavior.
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

We need that to avoid trying to double-free the driver.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This patch required lots of research and work. The existing
atomisp driver at staging assumed that all Intel PMIC would
be using regulators, but upstream didn't follow it. Instead,
the intel_pmic.c driver added a hack, instead of using i2c_transfer,
it writes I2C values directly via regmapped registers.

Oh, well... At least, it provided a common API for doing that.

The PMIC settings used here came from the driver at the
yocto Aero distribution:

	https://download.01.org/aero/deb/pool/main/l/linux-4.4.76-aero-1.3/

The logic itself was re-written, in order to use the I2C address
detected by the probing part.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The atomisp_gmin_platform.c is not a platform driver anymore,
but it is, instead, part of the atomisp driver.

Move it to be together with the driver. As a bonus, as the
atomisp i2c drivers depends on its contents, probing them
should load automatically the atomisp core. This should
likely avoid some possible race conditions.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>