On 7/17/20 10:48 AM, Sowjanya Komatineni wrote:
As we are running application that uses threads depending on when ctrl-c gets hit I see sigkill happens during kthread run even with break causing this.On 7/17/20 10:38 AM, Sowjanya Komatineni wrote:On 7/17/20 10:23 AM, Sowjanya Komatineni wrote:Hi Hans, As this happens only during this type of case, I can update to show message only when error code != EINTR.On 7/17/20 10:08 AM, Hans Verkuil wrote:On 17/07/2020 18:34, Sowjanya Komatineni wrote:I'll take a closer look next week. Good to know that it works fine for you.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 toTegra video driver.Jetson TX1 has camera expansion connector and supports custom camera moduledesigned as per TX1 design specification.This series also enables camera capture support for Jetson Nano which hasRaspberry 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: -4Something is not stable here. Regards, HansHi Hans,Running the same single frame continuous loop for more than 2 hours nowand 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 modulecausing 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 sideso something specific to IMX274 setup probably.Hmm, if this is normal behavior, then should this message be a debug messageRegarding kthread_run failure where kthread_run() returned -EINTR during capture start thread, I always see this happen at the point of stoppingthe continuous single stream while loop by pressing ctrl+c after few loops of execution.only? Or perhaps only show the message if the error code != EINTR.I believe its good to still show this as its reported by kthread_run -> kthread_create_on_node.But not sure in real usecase we will ever use while true like this and we should use script to also break while loop along with v4l2-ctl termination when ctrl-c terminate request happens.Thanks SowjanyaSorry, Was thinking to not mask debug message for -EINTR in case if it happens in any other valid scenarios. If you still want to mask, will update in next version.
Good way I see it working all the time is to use crtl-z and then kill application as below
Command to run while true; do ./v4l2-ctl --stream-mmap --stream-count=1; done To stop , press ctrl-z and then execute kill %%
Regards, Hanswhile true; do v4l2-ctl --stream-mmap --stream-count=1; done when we stop loop with ctrl+c, v4l2-ctl terminates but loop does notterminate 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 runin infinite loop.while true; do ./v4l2-ctl --stream-mmap --stream-count=1 || break; doneDelta between patch versions: [v3]: Includes v2 feedback- Uses separate helper function for retrieving remote csi subdeviceand source subdevice. - Added check for presence of subdevice ops set/get_selection - dropped vb2_queue_release from driver and usingvb2_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 setupprior 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 useseparate 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 argumentrather 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-domainsarm64: tegra: Add missing clocks and power-domains to Tegra210 VI I2Ci2c: 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 basedgpu: host1x: mipi: Use readl_relaxed_poll_timeout in tegra_mipi_wait gpu: host1x: mipi: Split tegra_mipi_calibrate and tegra_mipi_waitmedia: tegra-video: Add CSI MIPI pads calibrationmedia: 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(-)
