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Date: Fri, 17 Jul 2020 09:34:43 -0700
From: Sowjanya Komatineni <skomatineni@...dia.com>
To: Hans Verkuil <hverkuil@...all.nl>, <thierry.reding@...il.com>,
<jonathanh@...dia.com>, <frankc@...dia.com>, <sakari.ailus@....fi>,
<robh+dt@...nel.org>, <helen.koike@...labora.com>
CC: <digetx@...il.com>, <sboyd@...nel.org>,
<gregkh@...uxfoundation.org>, <linux-media@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-i2c@...r.kernel.org>
Subject: Re: [RFC PATCH v3 00/18] Support for Tegra video capture from
external sensor
On 7/17/20 3:54 AM, Hans Verkuil wrote:
> Hi Sowjanya,
>
> On 15/07/2020 06:20, Sowjanya Komatineni wrote:
>> This series adds support for video capture from external camera sensor to
>> Tegra video driver.
>>
>> Jetson TX1 has camera expansion connector and supports custom camera module
>> designed as per TX1 design specification.
>>
>> This series also enables camera capture support for Jetson Nano which has
>> Raspberry PI camera header.
>>
>> This series is tested with IMX219 camera sensor.
>>
>> This series include,
>>
>> VI I2C related fixes
>> - Camera sensor programming happens through VI I2C which is on host1x bus.
>> - These patches includes device tree and I2C driver fixes for VI I2C.
>>
>> Tegra video driver updates
>> - TPG Vs Non-TPG based on Kconfig
>> - Support for external sensor video capture based on device graph from DT.
>> - Support for selection ioctl operations
>> - Tegra MIPI CSI pads calibration
>> - CSI T-CLK and T-HS settle time computation based on clock rates.
>>
>> Host1x driver updates
>> - Adds API to allow creating mipi device for specific device node.
>> - Splits MIPI pads calibrate start and waiting for calibration to be done.
>>
>> Device tree updates
>> - Adds camera connector 2V8, 1V8, 1V2 regulator supplies to Jetson TX1 DT.
>> - Enabled VI and CSI support in Jetson Nano DT.
> I'm doing a bit of stress testing with:
>
> while true; do v4l2-ctl --stream-mmap --stream-count=1; done
>
> and I see that the imx274 has often streaming failures:
>
> [ 172.025144] IMX274 8-001a: s_stream failed
> [ 179.025192] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 3132 = 870 (2 bytes)
> [ 179.033575] IMX274 8-001a: s_stream failed
> [ 226.525378] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 3130 = 878 (2 bytes)
> [ 226.533761] IMX274 8-001a: s_stream failed
> [ 227.029325] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 30f6 = 107 (2 bytes)
> [ 227.037758] IMX274 8-001a: s_stream failed
> [ 247.025218] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 30f6 = 107 (2 bytes)
> [ 247.033658] IMX274 8-001a: s_stream failed
> [ 293.025517] IMX274 8-001a: s_stream failed
> [ 309.024727] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 30e0 = 0 (2 bytes)
> [ 309.032969] IMX274 8-001a: s_stream failed
> [ 309.529506] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 30f8 = 11d2 (3 bytes)
> [ 309.538103] IMX274 8-001a: imx274_set_frame_length error = -121
> [ 309.544102] IMX274 8-001a: imx274_set_frame_interval error = -121
> [ 309.550243] IMX274 8-001a: s_stream failed
> [ 314.025561] IMX274 8-001a: s_stream failed
> [ 329.025586] IMX274 8-001a: s_stream failed
> [ 340.529567] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 303a = f0c (2 bytes)
> [ 340.538009] IMX274 8-001a: s_stream failed
> [ 347.525627] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 30f6 = 107 (2 bytes)
> [ 347.534008] IMX274 8-001a: s_stream failed
> [ 365.033640] IMX274 8-001a: s_stream failed
> [ 437.525788] IMX274 8-001a: imx274_write_mbreg : i2c bulk write failed, 3038 = c (2 bytes)
> [ 437.533997] IMX274 8-001a: s_stream failed
> [ 456.029780] IMX274 8-001a: s_stream failed
> [ 472.025862] IMX274 8-001a: s_stream failed
> [ 498.025861] IMX274 8-001a: s_stream failed
> [ 500.025905] IMX274 8-001a: s_stream failed
>
> where v4l2-ctl returns:
>
> VIDIOC_STREAMON returned -1 (Remote I/O error)
>
> I don't see this with the imx219.
>
> I also see this occasionally:
>
> [Fri Jul 17 12:51:42 2020] video4linux video1: failed to run capture start kthread: -4
>
> Something is not stable here.
>
> Regards,
>
> Hans
Hi Hans,
Running the same single frame continuous loop for more than 2 hours now
and I don't see any failure.
Above failure shows i2c bulk writes to IMX274 failure due to which
s_stream also failed.
Not sure if its due to i2c mux in the path to sensor on your module
causing some issue when there is more i2c write traffic as we are doing
single stream in continuous loop. Also IMX219 does not show on your side
so something specific to IMX274 setup probably.
Regarding kthread_run failure where kthread_run() returned -EINTR during
capture start thread, I always see this happen at the point of stopping
the continuous single stream while loop by pressing ctrl+c after few
loops of execution.
while true; do v4l2-ctl --stream-mmap --stream-count=1; done
when we stop loop with ctrl+c, v4l2-ctl terminates but loop does not
terminate immediately and probably SIGKILLed is seen prior to complete.
Using below can help to terminate loop as well when we stop ctrl-c and
with this I don't see any repro of EINTR error from kthread_run when run
in infinite loop.
while true; do ./v4l2-ctl --stream-mmap --stream-count=1 || break; done
>>
>> Delta between patch versions:
>>
>> [v3]: Includes v2 feedback
>> - Uses separate helper function for retrieving remote csi subdevice
>> and source subdevice.
>> - Added check for presence of subdevice ops set/get_selection
>> - dropped vb2_queue_release from driver and using
>> vb2_video_unregister_device instead of video_unregister_device.
>> - video device register should happen in the last after all video
>> device related setup is done in the driver. This is being addressed
>> in below RFC patch. Once proper implementation of this is available
>> will update Tegra video driver to use split APIs and do all setup
>> prior to device register. Added this as TODO in the driver.
>> https://www.spinics.net/lists/linux-media/msg172761.html
>>
>> Note:
>> Patch-0012 has compilation dependency on
>> https://patchwork.kernel.org/patch/11659521/
>>
>>
>> [v2]: Includes below changes based on v1 feedback
>> - dt-binding document and the driver update for device graph to use
>> separate ports for sink endpoint and source endpoint for csi.
>> - Use data-lanes endpoint property for csi.
>> - Update tegra_mipi_request() to take device node pointer argument
>> rather than adding extra API.
>> - Remove checking for clk pointer before clk_disable.
>>
>>
>> Sowjanya Komatineni (18):
>> dt-bindings: i2c: tegra: Document Tegra210 VI I2C clocks and
>> power-domains
>> arm64: tegra: Add missing clocks and power-domains to Tegra210 VI I2C
>> i2c: tegra: Don't mark VI I2C as IRQ safe runtime PM
>> i2c: tegra: Remove NULL pointer check before
>> clk_enable/disable/prepare/unprepare
>> i2c: tegra: Fix the error path in tegra_i2c_runtime_resume
>> i2c: tegra: Fix runtime resume to re-init VI I2C
>> i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c
>> media: tegra-video: Fix channel format alignment
>> media: tegra-video: Enable TPG based on kernel config
>> media: tegra-video: Update format lookup to offset based
>> dt-bindings: tegra: Update VI and CSI bindings with port info
>> media: tegra-video: Add support for external sensor capture
>> media: tegra-video: Add support for selection ioctl ops
>> gpu: host1x: mipi: Update tegra_mipi_request() to be node based
>> gpu: host1x: mipi: Use readl_relaxed_poll_timeout in tegra_mipi_wait
>> gpu: host1x: mipi: Split tegra_mipi_calibrate and tegra_mipi_wait
>> media: tegra-video: Add CSI MIPI pads calibration
>> media: tegra-video: Compute settle times based on the clock rate
>>
>> .../display/tegra/nvidia,tegra20-host1x.txt | 92 ++-
>> .../devicetree/bindings/i2c/nvidia,tegra20-i2c.txt | 19 +-
>> arch/arm64/boot/dts/nvidia/tegra210.dtsi | 6 +
>> drivers/gpu/drm/tegra/dsi.c | 9 +-
>> drivers/gpu/host1x/mipi.c | 37 +-
>> drivers/i2c/busses/i2c-tegra.c | 101 +--
>> drivers/staging/media/tegra-video/Kconfig | 7 +
>> drivers/staging/media/tegra-video/csi.c | 247 ++++++-
>> drivers/staging/media/tegra-video/csi.h | 8 +
>> drivers/staging/media/tegra-video/tegra210.c | 25 +-
>> drivers/staging/media/tegra-video/vi.c | 793 +++++++++++++++++++--
>> drivers/staging/media/tegra-video/vi.h | 25 +-
>> drivers/staging/media/tegra-video/video.c | 23 +-
>> include/linux/host1x.h | 4 +-
>> 14 files changed, 1242 insertions(+), 154 deletions(-)
>>
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