staging: media: ipu3: remove ftrace-like logging

This patch fixes the following checkpatch.pl warnings in ipu3.c:

WARNING: Unnecessary ftrace-like logging - prefer using ftrace
+ dev_dbg(dev, "enter %s\n", __func__);

WARNING: Unnecessary ftrace-like logging - prefer using ftrace
+ dev_dbg(dev, "leave %s\n", __func__);

WARNING: Unnecessary ftrace-like logging - prefer using ftrace
+ dev_dbg(dev, "enter %s\n", __func__);

WARNING: Unnecessary ftrace-like logging - prefer using ftrace
+ dev_dbg(dev, "leave %s\n", __func__);

Fixes: 7fc7af649ca7 ("media: staging/intel-ipu3: Add imgu top level pci device driver")
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

media: staging/intel-ipu3: Cleanup dummy buffers via helper

Use an existing helper imgu_video_nodes_exit() on imgu-video-node
initialization failure path to cleanup dummy buffers.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

staging: media: ipu3: use pm_runtime_resume_and_get()

Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
added pm_runtime_resume_and_get() in order to automatically handle
dev->power.usage_count decrement on errors.

Use the new API, in order to cleanup the error check logic.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: staging: ipu3: Fix stale list entries on parameter queue failure

When queuing parameters fails, current code bails out without deleting
the corresponding vb2 buffer from the driver buffer list, but the buffer
is returned to vb2. This leads to stale list entries and a crash when
the driver stops streaming:

[ 224.935561] ipu3-imgu 0000:00:05.0: set parameters failed.
[ 224.998932] ipu3-imgu 0000:00:05.0: set parameters failed.
[ 225.064430] ipu3-imgu 0000:00:05.0: set parameters failed.
[ 225.128534] ipu3-imgu 0000:00:05.0: set parameters failed.
[ 225.194945] ipu3-imgu 0000:00:05.0: set parameters failed.
[ 225.360363] ------------[ cut here ]------------
[ 225.360372] WARNING: CPU: 0 PID: 6704 at
drivers/media/common/videobuf2/videobuf2-core.c:927
vb2_buffer_done+0x20f/0x21a [videobuf2_common]
[ 225.360374] Modules linked in: snd_seq_dummy snd_seq snd_seq_device
veth bridge stp llc tun nf_nat_tftp nf_conntrack_tftp nf_nat_ftp
nf_conntrack_ftp esp6 ah6 ip6t_REJECT ip6t_ipv6header cmac rfcomm uinput
ipu3_imgu(C) ipu3_cio2 iova videobuf2_v4l2 videobuf2_common
videobuf2_dma_sg videobuf2_memops ov13858 ov5670 v4l2_fwnode dw9714
acpi_als xt_MASQUERADE fuse iio_trig_sysfs cros_ec_sensors_ring
cros_ec_light_prox cros_ec_sensors cros_ec_sensors_core
industrialio_triggered_buffer kfifo_buf industrialio
cros_ec_sensorsupport cdc_ether btusb btrtl btintel btbcm usbnet
bluetooth ecdh_generic ecc hid_google_hammer iwlmvm iwl7000_mac80211
r8152 mii lzo_rle lzo_compress iwlwifi zram cfg80211 joydev
[ 225.360400] CPU: 0 PID: 6704 Comm: CameraDeviceOps Tainted: G
C 5.4.30 #5
[ 225.360402] Hardware name: HP Soraka/Soraka, BIOS
Google_Soraka.10431.106.0 12/03/2019
[ 225.360405] RIP: 0010:vb2_buffer_done+0x20f/0x21a [videobuf2_common]
[ 225.360408] Code: 5e 41 5f 5d e9 e0 16 5a d4 41 8b 55 08 48 c7 c7 8f
8b 5c c0 48 c7 c6 36 9a 5c c0 44 89 f9 31 c0 e8 a5 1c 5b d4 e9 53 fe ff
ff <0f> 0b eb a3 e8 12 d7 43 d4 eb 97 0f 1f 44 00 00 55 48 89 e5 41 56
[ 225.360410] RSP: 0018:ffff9468ab32fba8 EFLAGS: 00010297
[ 225.360412] RAX: ffff8aa7a51577a8 RBX: dead000000000122 RCX:
ffff8aa7a51577a8
[ 225.360414] RDX: 0000000000000000 RSI: 0000000000000006 RDI:
ffff8aa7a5157400
[ 225.360416] RBP: ffff9468ab32fbd8 R08: ffff8aa64e47e600 R09:
0000000000000000
[ 225.360418] R10: 0000000000000000 R11: ffffffffc06036e6 R12:
dead000000000100
[ 225.360420] R13: ffff8aa7820f1940 R14: ffff8aa7a51577a8 R15:
0000000000000006
[ 225.360422] FS: 00007c1146ffd700(0000) GS:ffff8aa7baa00000(0000)
knlGS:0000000000000000
[ 225.360424] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 225.360426] CR2: 00007aea3473a000 CR3: 00000000537d6004 CR4:
00000000003606f0
[ 225.360427] Call Trace:
[ 225.360434] imgu_return_all_buffers+0x6f/0x8e [ipu3_imgu]
[ 225.360438] imgu_vb2_stop_streaming+0xd6/0xf0 [ipu3_imgu]
[ 225.360441] __vb2_queue_cancel+0x33/0x22d [videobuf2_common]
[ 225.360443] vb2_core_streamoff+0x16/0x78 [videobuf2_common]
[ 225.360448] __video_do_ioctl+0x33d/0x42a
[ 225.360452] video_usercopy+0x34a/0x615
[ 225.360455] ? video_ioctl2+0x16/0x16
[ 225.360458] v4l2_ioctl+0x46/0x53
[ 225.360462] do_vfs_ioctl+0x50a/0x787
[ 225.360465] ksys_ioctl+0x58/0x83
[ 225.360468] __x64_sys_ioctl+0x1a/0x1e
[ 225.360470] do_syscall_64+0x54/0x68
[ 225.360474] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 225.360476] RIP: 0033:0x7c118030f497
[ 225.360479] Code: 8a 66 90 48 8b 05 d1 d9 2b 00 64 c7 00 26 00 00 00
48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d9 2b 00 f7 d8 64 89 01 48
[ 225.360480] RSP: 002b:00007c1146ffa5a8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[ 225.360483] RAX: ffffffffffffffda RBX: 00007c1140010018 RCX:
00007c118030f497
[ 225.360484] RDX: 00007c114001019c RSI: 0000000040045613 RDI:
000000000000004c
[ 225.360486] RBP: 00007c1146ffa700 R08: 00007c1140010048 R09:
0000000000000000
[ 225.360488] R10: 0000000000000000 R11: 0000000000000246 R12:
00007c11400101b0
[ 225.360489] R13: 00007c1140010200 R14: 00007c1140010048 R15:
0000000000000001
[ 225.360492] ---[ end trace 73625ecfbd1c930e ]---
[ 225.360498] general protection fault: 0000 [#1] PREEMPT SMP PTI
[ 225.360501] CPU: 0 PID: 6704 Comm: CameraDeviceOps Tainted: G
WC 5.4.30 #5
[ 225.360502] Hardware name: HP Soraka/Soraka, BIOS
Google_Soraka.10431.106.0 12/03/2019
[ 225.360505] RIP: 0010:imgu_return_all_buffers+0x52/0x8e [ipu3_imgu]
[ 225.360507] Code: d4 49 8b 85 70 0a 00 00 49 81 c5 70 0a 00 00 49 39
c5 74 3b 49 bc 00 01 00 00 00 00 ad de 49 8d 5c 24 22 4c 8b 30 48 8b 48
08 <49> 89 4e 08 4c 89 31 4c 89 20 48 89 58 08 48 8d b8 58 fc ff ff 44
[ 225.360509] RSP: 0018:ffff9468ab32fbe8 EFLAGS: 00010293
[ 225.360511] RAX: ffff8aa7a51577a8 RBX: dead000000000122 RCX:
dead000000000122
[ 225.360512] RDX: 0000000000000000 RSI: 0000000000000006 RDI:
ffff8aa7a5157400
[ 225.360514] RBP: ffff9468ab32fc18 R08: ffff8aa64e47e600 R09:
0000000000000000
[ 225.360515] R10: 0000000000000000 R11: ffffffffc06036e6 R12:
dead000000000100
[ 225.360517] R13: ffff8aa7820f1940 R14: dead000000000100 R15:
0000000000000006
[ 225.360519] FS: 00007c1146ffd700(0000) GS:ffff8aa7baa00000(0000)
knlGS:0000000000000000
[ 225.360521] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 225.360523] CR2: 00007aea3473a000 CR3: 00000000537d6004 CR4:
00000000003606f0
[ 225.360525] Call Trace:
[ 225.360528] imgu_vb2_stop_streaming+0xd6/0xf0 [ipu3_imgu]
[ 225.360531] __vb2_queue_cancel+0x33/0x22d [videobuf2_common]
[ 225.360534] vb2_core_streamoff+0x16/0x78 [videobuf2_common]
[ 225.360537] __video_do_ioctl+0x33d/0x42a
[ 225.360540] video_usercopy+0x34a/0x615
[ 225.360542] ? video_ioctl2+0x16/0x16
[ 225.360546] v4l2_ioctl+0x46/0x53
[ 225.360548] do_vfs_ioctl+0x50a/0x787
[ 225.360551] ksys_ioctl+0x58/0x83
[ 225.360554] __x64_sys_ioctl+0x1a/0x1e
[ 225.360556] do_syscall_64+0x54/0x68
[ 225.360559] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 225.360561] RIP: 0033:0x7c118030f497
[ 225.360563] Code: 8a 66 90 48 8b 05 d1 d9 2b 00 64 c7 00 26 00 00 00
48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d9 2b 00 f7 d8 64 89 01 48
[ 225.360565] RSP: 002b:00007c1146ffa5a8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[ 225.360567] RAX: ffffffffffffffda RBX: 00007c1140010018 RCX:
00007c118030f497
[ 225.360569] RDX: 00007c114001019c RSI: 0000000040045613 RDI:
000000000000004c
[ 225.360570] RBP: 00007c1146ffa700 R08: 00007c1140010048 R09:
0000000000000000
[ 225.360572] R10: 0000000000000000 R11: 0000000000000246 R12:
00007c11400101b0
[ 225.360574] R13: 00007c1140010200 R14: 00007c1140010048 R15:
0000000000000001
[ 225.360576] Modules linked in: snd_seq_dummy snd_seq snd_seq_device
veth bridge stp llc tun nf_nat_tftp nf_conntrack_tftp nf_nat_ftp
nf_conntrack_ftp esp6 ah6 ip6t_REJECT ip6t_ipv6header cmac rfcomm uinput
ipu3_imgu(C) ipu3_cio2 iova videobuf2_v4l2 videobuf2_common
videobuf2_dma_sg videobuf2_memops ov13858 ov567

Fix this by moving the list_del() call just below the list_first_entry()
call when the buffer no longer needs to be in the list.

Fixes: 8ecc7c9da013 ("media: staging/intel-ipu3: parameter buffer refactoring")
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: staging/intel-ipu3: Implement lock for stream on/off operations

Currently concurrent stream off operations on ImgU nodes are not
synchronized, leading to use-after-free bugs (as reported by KASAN).

[ 250.090724] BUG: KASAN: use-after-free in
ipu3_dmamap_free+0xc5/0x116 [ipu3_imgu]
[ 250.090726] Read of size 8 at addr ffff888127b29bc0 by task
yavta/18836
[ 250.090731] Hardware name: HP Soraka/Soraka, BIOS
Google_Soraka.10431.17.0 03/22/2018
[ 250.090732] Call Trace:
[ 250.090735] dump_stack+0x6a/0xb1
[ 250.090739] print_address_description+0x8e/0x279
[ 250.090743] ? ipu3_dmamap_free+0xc5/0x116 [ipu3_imgu]
[ 250.090746] kasan_report+0x260/0x28a
[ 250.090750] ipu3_dmamap_free+0xc5/0x116 [ipu3_imgu]
[ 250.090754] ipu3_css_pool_cleanup+0x24/0x37 [ipu3_imgu]
[ 250.090759] ipu3_css_pipeline_cleanup+0x61/0xb9 [ipu3_imgu]
[ 250.090763] ipu3_css_stop_streaming+0x1f2/0x321 [ipu3_imgu]
[ 250.090768] imgu_s_stream+0x94/0x443 [ipu3_imgu]
[ 250.090772] ? ipu3_vb2_buf_queue+0x280/0x280 [ipu3_imgu]
[ 250.090775] ? vb2_dma_sg_unmap_dmabuf+0x16/0x6f [videobuf2_dma_sg]
[ 250.090778] ? vb2_buffer_in_use+0x36/0x58 [videobuf2_common]
[ 250.090782] ipu3_vb2_stop_streaming+0xf9/0x135 [ipu3_imgu]

Implemented a lock to synchronize imgu stream on / off operations and
the modification of streaming flag (in struct imgu_device), to prevent
these issues.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com>
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: staging: imgu: make imgu work on low frequency for low input

Currently, imgu is working on 450MHz for all cases, however
in some cases (input frame less than 2048x1152), the imgu
did not need work in high frequency.
This patch make imgu work on 200MHz if the imgu input
frame is less than 2048x1152 to save power.

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: staging/intel-ipu3: Use dev_get_drvdata where possible

Instead of using to_pci_dev + pci_get_drvdata,
use dev_get_drvdata to make code simpler.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging/intel-ipu3: parameter buffer refactoring

Current ImgU driver processes and releases the parameter buffer
immediately after queued from user. This does not align with other
image buffers which are grouped in sets and used for the same frame.
If user queues multiple parameter buffers continuously, only the last
one will take effect.
To make consistent buffers usage, this patch changes the parameter
buffer handling and group parameter buffer with other image buffers
for each frame.
Each time driver will queue one more group of buffers when previous
frame processed and buffers consumed by css.

Signed-off-by: Tianshu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

staging: media: ipu3: Avoid unnecessary blank line.

Remove unnecessary blank line.
Issue found using checkpatch.pl

Signed-off-by: Sanjana Sanikommu <sanjana99reddy99@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

media: staging/intel-ipu3: mark PM function as __maybe_unused

The imgu_rpm_dummy_cb() looks like an API misuse that is explained
in the comment above it. Aside from that, it also causes a warning
when power management support is disabled:

drivers/staging/media/ipu3/ipu3.c:794:12: error: 'imgu_rpm_dummy_cb' defined but not used [-Werror=unused-function]

The warning is at least easy to fix by marking the function as
__maybe_unused.

Fixes: 7fc7af649ca7 ("media: staging/intel-ipu3: Add imgu top level pci device driver")

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ipu3-imgu: Prefix functions with imgu_* instead of ipu3_*

This addresses the below TODO item, no function related changes:

- Prefix imgu for all public APIs, i.e. change ipu3_v4l2_register() to
imgu_v4l2_register(). (Sakari)

The changes were obtained by applying the following perl script
to driver code under drivers/staging/media/ipu3/.

perl -pi.back -e 's/ipu3_(?!uapi)/imgu_/g;'

Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ipu3-imgu: Remove dead code for NULL check

Since ipu3_css_buf_dequeue() never returns NULL, remove the
dead code to fix static checker warning:

drivers/staging/media/ipu3/ipu3.c:493 imgu_isr_threaded()
warn: 'b' is an error pointer or valid

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
[Bug report: https://lore.kernel.org/linux-media/20190104122856.GA1169@kadam/]
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ipu3-imgu: Fix compiler warnings

Address a few false positive compiler warnings related to uninitialised
variables. While at it, use bool where bool is needed and %u to print an
unsigned integer.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging/intel-ipu3: Add dual pipe support

This patch adds support to run dual pipes simultaneously.
A private ioctl to configure the pipe mode (video or still)
is also implemented.

IPU3 hardware supports a maximum of 2 streams per pipe.
With the support of dual pipes, more than 2 stream outputs
can be achieved.

This helps to support advanced camera features like
Continuous View Finder (CVF) and Snapshot During Video(SDV).

Extend ipu3 IMGU driver to support dual pipes

1. Extend current IMGU device to contain 2 groups
of video nodes and 2 subdevs
2. Extend current css to support 2 pipeline and make
CSS APIs to support 2 pipe
3. Add a v4l2 ctrl to allow user to specify the mode
of the pipe
4. Check media pipeline link status to get enabled
pipes

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Tian Shu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging/intel-ipu3: Add imgu top level pci device driver

This patch adds support for the Intel IPU v3 as found
on Skylake and Kaby Lake SoCs.

The driver glues v4l2, css(camera sub system) and other
pieces together to perform its functions, it also loads
the IPU3 firmware binary as part of its initialization.

Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>