# TC358840 tegra\_channel\_init\_subdevices kernel error! **URL:** \ **Category:** Jetson TX2\ **Tags:** camera\ **Created:** [June 30, 2021, 3:23am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304 "2021-06-30T03:23:57Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [June 30, 2021, 3:23am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/1 "2021-06-30T03:23:57Z")
Hi, On Tx2 board, I refer imx274.dtsi and modify tc358840.c, compile and install successfully, my tc358840 device tree is: ```auto / { host1x { vi@15700000 { num-channels = <1>; ports { #address-cells = <1>; #size-cells = <0>; port@0 { reg = <0>; tc358840a_vi_in0: endpoint { port-index = <0>; bus-width = <2>; remote-endpoint = <&tc358840a_csi_out0>; }; }; }; }; nvcsi@150c0000 { num-channels = <1>; #address-cells = <1>; #size-cells = <0>; channel@0 { reg = <0>; ports { #address-cells = <1>; #size-cells = <0>; port@0 { reg = <0>; tc358840a_csi_in0: endpoint@0 { port-index = <0>; bus-width = <2>; remote-endpoint = <&tc358840a_imx274_out0>; }; }; port@1 { reg = <1>; tc358840a_csi_out0: endpoint@1 { remote-endpoint = <&tc358840a_vi_in0>; }; }; }; }; }; }; i2c@3180000 { tc358840@0f { compatible = "toshiba,tc358840"; /* I2C device address */ reg = <0x0f>; /* V4L2 device node location */ devnode = "video0"; /* Physical dimensions of sensor */ physical_w = "3.674"; physical_h = "2.738"; sensor_model = "tc358840"; lineinitcnt = <0x00000FA0>; lptxtimecnt = <0x00000004>; tclk_headercnt = <0x00180203>; tclk_trailcnt = <0x00040005>; ths_headercnt = <0x000D0004>; twakeup = <0x00003E80>; tclk_postcnt = <0x0000000A>; ths_trailcnt = <0x00080006>; hstxvregcnt = <0x00000020>; btacnt = <0>; pll_prd = <10>; pll_fbd = <230>; pll_frs = <0>; refclk_hz = <27000000>; //mclk = "cam_mclk1"; ddc5v_delay = <1>; enable_hdcp = <0>; csi_port = <0>; ports { #address-cells = <1>; #size-cells = <0>; port@0 { reg = <0>; tc358840a_imx274_out0: endpoint { port-index = <0>; bus-width = <2>; remote-endpoint = <&tc358840a_csi_in0>; }; }; }; }; }; }; / { tegra-camera-platform { compatible = "nvidia, tegra-camera-platform"; /** * Physical settings to calculate max ISO BW * * num_csi_lanes = <>; * Total number of CSI lanes when all cameras are active * * max_lane_speed = <>; * Max lane speed in Kbit/s * * min_bits_per_pixel = <>; * Min bits per pixel * * vi_peak_byte_per_pixel = <>; * Max byte per pixel for the VI ISO case * * vi_bw_margin_pct = <>; * Vi bandwidth margin in percentage * * max_pixel_rate = <>; * Max pixel rate in Kpixel/s for the ISP ISO case * * isp_peak_byte_per_pixel = <>; * Max byte per pixel for the ISP ISO case * * isp_bw_margin_pct = <>; * Isp bandwidth margin in percentage */ num_csi_lanes = <2>; max_lane_speed = <1500000>; min_bits_per_pixel = <16>; vi_peak_byte_per_pixel = <2>; vi_bw_margin_pct = <25>; max_pixel_rate = <750000>; isp_peak_byte_per_pixel = <5>; isp_bw_margin_pct = <25>; /** * The general guideline for naming badge_info contains 3 parts, and is as follows, * The first part is the camera_board_id for the module; if the module is in a FFD * platform, then use the platform name for this part. * The second part contains the position of the module, ex. "rear" or "front". * The third part contains the last 6 characters of a part number which is found * in the module's specsheet from the vender. */ modules { module0 { badge = "tc358840_bottom_A6V26"; position = "rear"; orientation = "0"; drivernode0 { /* Declare PCL support driver (classically known as guid) */ pcl_id = "v4l2_sensor"; /* Driver v4l2 device name */ devname = "tc358840 2-000f"; /* Declare the device-tree hierarchy to driver instance */ proc-device-tree = "/proc/device-tree/i2c@3180000/tc358840@0f"; }; }; }; }; }; ``` However, I got kernel error after added mode parameters into tc358840@0f node: ```auto i2c@3180000 { tc358840@0f { compatible = "toshiba,tc358840"; /* I2C device address */ reg = <0x0f>; /* V4L2 device node location */ devnode = "video0"; /* Physical dimensions of sensor */ physical_w = "3.674"; physical_h = "2.738"; sensor_model = "tc358840"; lineinitcnt = <0x00000FA0>; lptxtimecnt = <0x00000004>; tclk_headercnt = <0x00180203>; tclk_trailcnt = <0x00040005>; ths_headercnt = <0x000D0004>; twakeup = <0x00003E80>; tclk_postcnt = <0x0000000A>; ths_trailcnt = <0x00080006>; hstxvregcnt = <0x00000020>; btacnt = <0>; pll_prd = <10>; pll_fbd = <230>; pll_frs = <0>; refclk_hz = <27000000>; //mclk = "cam_mclk1"; ddc5v_delay = <1>; enable_hdcp = <0>; csi_port = <0>; mode0 { mclk_khz = "27000"; num_lanes = [32 00]; tegra_sinterface = "serial_c"; phy_mode = "DPHY"; discontinuous_clk = "no"; dpcm_enable = "false"; cil_settletime = [30 00]; active_w = "1920"; active_h = "1080"; mode_type = "yuv"; pixel_phase = "uyvy"; csi_pixel_bit_depth = "16"; readout_orientation = [30 00]; line_length = "2688"; inherent_gain = [31 00]; mclk_multiplier = "6.67"; pix_clk_hz = "160000000"; gain_factor = "10"; min_gain_val = "10"; max_gain_val = "160"; step_gain_val = [31 00]; default_gain = "10"; min_hdr_ratio = [31 00]; max_hdr_ratio = [31 00]; framerate_factor = "1000000"; min_framerate = "1816577"; max_framerate = "30000000"; step_framerate = [31 00]; default_framerate = "30000000"; exposure_factor = "1000000"; min_exp_time = "34"; max_exp_time = "550385"; step_exp_time = [31 00]; default_exp_time = "33334"; embedded_metadata_height = [30 00]; }; ports { #address-cells = <1>; #size-cells = <0>; port@0 { reg = <0>; tc358840a_imx274_out0: endpoint { port-index = <0>; bus-width = <2>; remote-endpoint = <&tc358840a_csi_in0>; }; }; }; }; }; }; ``` the error message is: ```auto [33.207041] tc358840 2-000f: tc358840_get_fmt(): [33.211690] tc358840 2-000f: tc358840_get_fmt(): width=1920, height=1080, code=0x0000200F, field=1 [33.220662] tegra_channel_init_subdevices: 4 [33.225034] tegra_channel_init_subdevices: 5 [33.229324] tegra_channel_init_subdevices: 5-3 [33.233837] tegra_channel_sensorprops_setup: 1 [33.238360] tegra_channel_sensorprops_setup: 2 [33.242880] tegra_channel_sensorprops_setup: 3 [33.247401] tegra_channel_sensorprops_setup: num_modes = 1 [33.252946] tegra_channel_sensorprops_setup: 3-1 [33.257725] Internal error: Accessing user space memory outside uaccess.h routines: 96000005 [#1] PREEMPT SMP [33.267647] Modules linked in: tc358840(+) bnep fuse bcmdhd zram cfg80211 spidev overlay userspace_alert nvgpu bluedroid_pm ip_tables x_tables [33.280751] CPU: 0 PID: 7281 Comm: insmod Not tainted 4.9.201-tegra #41 [33.287371] Hardware name: quill (DT) [33.291047] task: ffffffc1b8975400 task.stack: ffffffc1c155c000 [33.297007] PC is at tegra_channel_init_subdevices+0x79c/0x868 [33.302852] LR is at tegra_channel_init_subdevices+0x784/0x868 [33.308693] pc : [] lr : [] pstate: 40400045 [33.316091] sp : ffffffc1c155f810 [33.319413] x29: ffffffc1c155f810 x28: 0000000000000000 [33.324775] x27: 0000000000000002 x26: ffffffc1c06c2000 [33.330135] x25: ffffffc1c59dc000 x24: ffffffc1b76a8000 [33.335495] x23: ffffffc1b76cd858 x22: 0000000000000000 [33.340854] x21: ffffffc1c59d8000 x20: ffffff8009071000 [33.346212] x19: ffffffc1e93cf018 x18: 0000000000000010 [33.351568] x17: 0000000000000000 x16: 0000000000000000 [33.356924] x15: ffffffffffffffff x14: ffffff808a14a5b7 [33.362282] x13: ffffff800a14a5c5 x12: 0000000000000000 [33.367640] x11: 0000000005f5e0ff x10: 000000000000054d [33.372998] x9 : ffffffc1c06c20d0 x8 : ffffff80083d6638 [33.378356] x7 : ffffff8009eb4440 x6 : ffffffc1f5f74bf0 [33.383714] x5 : ffffffc1f5f74bf0 x4 : 0000000000000000 [33.389071] x3 : ffffffc1f5f7a7f8 x2 : 0000000000000000 [33.394428] x1 : ffffff8009072048 x0 : ffffff80094c9ec8 [33.399785] [33.401288] Process insmod (pid: 7281, stack limit = 0xffffffc1c155c000) [33.407993] Call trace: [33.410462] [] tegra_channel_init_subdevices+0x79c/0x868 [33.417348] [] tegra_vi_graph_notify_complete+0x2e8/0x6e8 [33.424324] [] v4l2_async_test_notify+0x104/0x120 [33.430601] [] v4l2_async_register_subdev+0x88/0x100 [33.437183] [] tc358840_probe+0x5a8/0x738 [tc358840] [33.443725] [] i2c_device_probe+0x144/0x258 [33.449492] [] driver_probe_device+0xd8/0x408 [33.455419] [] __driver_attach+0xdc/0x128 [33.461000] [] bus_for_each_dev+0x5c/0xa8 [33.466579] [] driver_attach+0x30/0x40 [33.471898] [] bus_add_driver+0x20c/0x2a8 [33.477481] [] driver_register+0x6c/0x110 [33.483061] [] i2c_register_driver+0x4c/0xb0 [33.488929] [] tc358840_driver_init+0x18/0x30 [tc358840] [33.495819] [] do_one_initcall+0x44/0x130 [33.501409] [] do_init_module+0x64/0x1a8 [33.506909] [] load_module+0x10a0/0x12d0 [33.512402] [] SyS_finit_module+0xd8/0xf0 [33.517980] [] el0_svc_naked+0x34/0x38 [33.523304] ---[end trace f97d58752f93ac6d]--- ``` What is the problem? ---
**Author:** ![ShaneCCC](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shaneccc/32/14043_2.png) [@ShaneCCC](https://forums.developer.nvidia.com/u/ShaneCCC)\ **Post date:** [June 30, 2021, 5:33am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/3 "2021-06-30T05:33:57Z")
Why do you need to add mode0, I think this driver don’t need to add this it could duplicate reported the sensor mode. ---
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [June 30, 2021, 5:41am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/4 "2021-06-30T05:41:57Z")
If don’t have mode parameters, how v4l2 module knows active\_w and other parameters, and how v4l2 module calculate cil\_settletime? As I know, cil\_settletime, discontinuous\_clk, etc, are essential for MIPI CSI… ---
**Author:** ![ShaneCCC](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shaneccc/32/14043_2.png) [@ShaneCCC](https://forums.developer.nvidia.com/u/ShaneCCC)\ **Post date:** [June 30, 2021, 5:53am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/5 "2021-06-30T05:53:00Z")
The tc358840.c have report the mode by itself, you should add it in this driver. ---
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [June 30, 2021, 5:57am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/6 "2021-06-30T05:57:48Z")
Ok… There is, my hardware module is tc358743, I find a file tc358743.c in kernel-4.9 folder, can it work well without modification? Or Is it been tested by official? ---
**Author:** ![ShaneCCC](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shaneccc/32/14043_2.png) [@ShaneCCC](https://forums.developer.nvidia.com/u/ShaneCCC)\ **Post date:** [June 30, 2021, 6:05am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/7 "2021-06-30T06:05:05Z")
No sure, but it been verify by many user. Have a reference to below link or googling it. > **[Toshiba TC358743 | TC358743 Linux Driver for Jetson](https://developer.ridgerun.com/wiki/index.php?title=Toshiba_TC358743_Linux_driver_for_Jetson_TX1%2FTX2%2FNano)** > > Learn more about the Toshiba TC358743 Linux driver for Jetson which is capable of handling video data up to 1080P at 60fps. ---
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [June 30, 2021, 6:10am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/8 "2021-06-30T06:10:13Z")
> [@ShaneCCC](#): > > No sure, but it been verify by many user. Have a reference to below link or googling it. > > [Toshiba TC358743 Linux driver for Jetson - RidgeRun Developer Wiki](https://developer.ridgerun.com/wiki/index.php?title=Toshiba_TC358743_Linux_driver_for_Jetson_TX1/TX2/Nano) Thank you! ---
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [June 30, 2021, 10:00am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/9 "2021-06-30T10:00:45Z")
> [@ShaneCCC](#): > > No sure, but it been verify by many user. Have a reference to below link or googling it. > > [Toshiba TC358743 Linux driver for Jetson - RidgeRun Developer Wiki](https://developer.ridgerun.com/wiki/index.php?title=Toshiba_TC358743_Linux_driver_for_Jetson_TX1/TX2/Nano) my tc358743 driver has installed successfully, also generate /dev/video0… when I use v4l2-ctl to capture data, I got the error: ```auto tegra-vi4 15700000.vi: dma_alloc_coherent of size 0 failed ``` ---
**Author:** ![ShaneCCC](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shaneccc/32/14043_2.png) [@ShaneCCC](https://forums.developer.nvidia.com/u/ShaneCCC)\ **Post date:** [June 30, 2021, 12:22pm UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/10 "2021-06-30T12:22:41Z")
What’s the command? Check the trace log to check if can get more information. [https://elinux.org/Jetson/l4t/Camera\_BringUp](https://elinux.org/Jetson/l4t/Camera_BringUp) ---
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [July 1, 2021, 1:26am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/11 "2021-07-01T01:26:16Z")
The command is: v4l2-ctl -d /dev/video0 --set-fmt-video=width=1920,height=1080,pixelformat=UYVY --stream-mmap --stream-count=10000 --set-ctrl bypass\_mode=0 The kernel log is : ```auto root@linux:/home/jetson#[281.270151] tc358840 2-000f: tc358743_query_dv_timings: @@@@@ timings detected error [281.279159] tc358840 2-000f: tc358743_query_dv_timings: @@@@@ timings detected error [282.291151] tegra-vi4 15700000.vi: dma_alloc_coherent of size 0 failed ``` The MIPI log is : ```auto root@linux:/home/jetson# v4l2-ctl -d /dev/video0 --set-fmt-video=width=1920,height=1080,pixelformat=UYVY --stream-mmap --stream-count=10000 --set-ctrl bypass_mode=0 New timings found VIDIOC_REQBUFS: failed: Cannot allocate memory root@linux:/home/jetson# cat /sys/kernel/debug/tracing/trace# tracer: nop # # entries-in-buffer/entries-written: 52/52 #P:6 # # _-----=> irqs-off # / _----=> need-resched # | / _---=> hardirq/softirq # || / _--=> preempt-depth # ||| / delay # TASK-PID CPU# |||| TIMESTAMP FUNCTION # | | | |||| | | kworker/5:0-42 [005] .... 246.578383: rtos_queue_peek_from_isr_failed: tstamp:7964200424 queue:0x0b4b4500 kworker/5:0-42 [005] .... 246.746350: rtos_queue_peek_from_isr_failed: tstamp:7969200427 queue:0x0b4b4500 kworker/5:0-42 [005] .... 246.914349: rtos_queue_peek_from_isr_failed: tstamp:7974200434 queue:0x0b4b4500 kworker/5:0-42 [005] .... 247.082340: rtos_queue_peek_from_isr_failed: tstamp:7979200440 queue:0x0b4b4500 kworker/5:0-42 [005] .... 247.250353: rtos_queue_peek_from_isr_failed: tstamp:7984200449 queue:0x0b4b4500 kworker/5:0-42 [005] .... 247.362355: rtos_queue_peek_from_isr_failed: tstamp:7989200452 queue:0x0b4b4500 kworker/5:0-42 [005] .... 247.530347: rtos_queue_peek_from_isr_failed: tstamp:7994200461 queue:0x0b4b4500 kworker/5:0-42 [005] .... 247.698335: rtos_queue_peek_from_isr_failed: tstamp:7999200468 queue:0x0b4b4500 kworker/5:0-42 [005] .... 247.866341: rtos_queue_peek_from_isr_failed: tstamp:8004200475 queue:0x0b4b4500 kworker/5:0-42 [005] .... 248.034332: rtos_queue_peek_from_isr_failed: tstamp:8009200481 queue:0x0b4b4500 kworker/5:0-42 [005] .... 248.202344: rtos_queue_peek_from_isr_failed: tstamp:8014200487 queue:0x0b4b4500 kworker/5:0-42 [005] .... 248.370338: rtos_queue_peek_from_isr_failed: tstamp:8019200493 queue:0x0b4b4500 kworker/5:0-42 [005] .... 248.482330: rtos_queue_peek_from_isr_failed: tstamp:8024200541 queue:0x0b4b4500 kworker/5:0-42 [005] .... 248.650321: rtos_queue_peek_from_isr_failed: tstamp:8029200549 queue:0x0b4b4500 kworker/5:0-42 [005] .... 248.818308: rtos_queue_peek_from_isr_failed: tstamp:8034200556 queue:0x0b4b4500 kworker/5:0-42 [005] .... 248.986299: rtos_queue_peek_from_isr_failed: tstamp:8039200561 queue:0x0b4b4500 kworker/5:0-42 [005] .... 249.154298: rtos_queue_peek_from_isr_failed: tstamp:8044200567 queue:0x0b4b4500 kworker/5:0-42 [005] .... 249.322316: rtos_queue_peek_from_isr_failed: tstamp:8049200576 queue:0x0b4b4500 kworker/5:0-42 [005] .... 249.490296: rtos_queue_peek_from_isr_failed: tstamp:8054200582 queue:0x0b4b4500 kworker/5:0-42 [005] .... 249.602301: rtos_queue_peek_from_isr_failed: tstamp:8059200589 queue:0x0b4b4500 kworker/5:0-42 [005] .... 249.770283: rtos_queue_peek_from_isr_failed: tstamp:8064200641 queue:0x0b4b4500 kworker/5:0-42 [005] .... 249.938281: rtos_queue_peek_from_isr_failed: tstamp:8069200601 queue:0x0b4b4500 kworker/5:0-42 [005] .... 250.106291: rtos_queue_peek_from_isr_failed: tstamp:8074200607 queue:0x0b4b4500 kworker/5:0-42 [005] .... 250.274269: rtos_queue_peek_from_isr_failed: tstamp:8079200616 queue:0x0b4b4500 kworker/5:0-42 [005] .... 250.442274: rtos_queue_peek_from_isr_failed: tstamp:8084200622 queue:0x0b4b4500 kworker/5:0-42 [005] .... 250.610304: rtos_queue_peek_from_isr_failed: tstamp:8089200630 queue:0x0b4b4500 kworker/5:0-42 [005] .... 250.722282: rtos_queue_peek_from_isr_failed: tstamp:8094200636 queue:0x0b4b4500 kworker/5:0-42 [005] .... 250.890224: rtos_queue_peek_from_isr_failed: tstamp:8099200642 queue:0x0b4b4500 kworker/5:0-42 [005] .... 251.058261: rtos_queue_peek_from_isr_failed: tstamp:8104200649 queue:0x0b4b4500 kworker/5:0-42 [005] .... 251.226255: rtos_queue_peek_from_isr_failed: tstamp:8109200657 queue:0x0b4b4500 kworker/5:0-42 [005] .... 251.394274: rtos_queue_peek_from_isr_failed: tstamp:8114200664 queue:0x0b4b4500 kworker/5:0-42 [005] .... 251.562254: rtos_queue_peek_from_isr_failed: tstamp:8119200672 queue:0x0b4b4500 kworker/5:0-42 [005] .... 251.730247: rtos_queue_peek_from_isr_failed: tstamp:8124200677 queue:0x0b4b4500 kworker/5:0-42 [005] .... 251.842252: rtos_queue_peek_from_isr_failed: tstamp:8129200683 queue:0x0b4b4500 kworker/5:0-42 [005] .... 252.010240: rtos_queue_peek_from_isr_failed: tstamp:8134200690 queue:0x0b4b4500 kworker/5:0-42 [005] .... 252.122169: rtos_queue_peek_from_isr_failed: tstamp:8137807567 queue:0x0b4b4500 v4l_id-7475 [005] .... 255.547999: tegra_channel_open: vi-output, tc358840 2-000f v4l_id-7475 [003] .... 255.549810: tegra_channel_set_power: tc358840 2-000f : 0x1 v4l_id-7475 [003] .... 255.560716: tegra_channel_set_power: 150c0000.nvcsi--1 : 0x1 v4l_id-7475 [003] .... 255.565803: csi_s_power: enable : 0x1 v4l_id-7475 [003] .... 255.572966: tegra_channel_close: vi-output, tc358840 2-000f v4l_id-7475 [003] .... 255.572971: tegra_channel_set_power: tc358840 2-000f : 0x0 v4l_id-7475 [003] .... 255.583804: tegra_channel_set_power: 150c0000.nvcsi--1 : 0x0 v4l_id-7475 [004] .... 255.589889: csi_s_power: enable : 0x0 v4l2-ctl-7481 [000] .... 281.214258: tegra_channel_open: vi-output, tc358840 2-000f v4l2-ctl-7481 [000] .... 281.215437: tegra_channel_set_power: tc358840 2-000f : 0x1 v4l2-ctl-7481 [000] .... 281.226385: tegra_channel_set_power: 150c0000.nvcsi--1 : 0x1 v4l2-ctl-7481 [000] .... 281.231486: csi_s_power: enable : 0x1 v4l2-ctl-7481 [000] .... 282.298077: tegra_channel_close: vi-output, tc358840 2-000f v4l2-ctl-7481 [000] .... 282.298095: tegra_channel_set_power: tc358840 2-000f : 0x0 v4l2-ctl-7481 [000] .... 282.309273: tegra_channel_set_power: 150c0000.nvcsi--1 : 0x0 v4l2-ctl-7481 [000] .... 282.314451: csi_s_power: enable : 0x0 root@linux:/home/jetson# ``` ---
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [July 1, 2021, 1:29am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/12 "2021-07-01T01:29:44Z")
I post my device tree files and driver, please help to check them if possible… Thank you very much! [tc358743.c](https://forums.developer.nvidia.com/uploads/short-url/7kXE46cNMeO1PLXJoknjw9aRreP.c) (72.7 KB) [tegra186-camera-imx274-a00.dtsi](https://forums.developer.nvidia.com/uploads/short-url/9TTXzdJGN6ANjODKNIQm6opvnxZ.dtsi) (4.5 KB) [tegra186-quill-camera-imx274-a00.dtsi](https://forums.developer.nvidia.com/uploads/short-url/1i4aZRuSkzy0RZgLtzqWe0veKls.dtsi) (1.5 KB) [tegra186-quill-camera-plugin-manager-imx274.dtsi](https://forums.developer.nvidia.com/uploads/short-url/yrU2JcW8PUpQ7UNBtAM9mfANw2n.dtsi) (3.1 KB) ---
**Author:** ![ShaneCCC](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shaneccc/32/14043_2.png) [@ShaneCCC](https://forums.developer.nvidia.com/u/ShaneCCC)\ **Post date:** [July 1, 2021, 4:43am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/13 "2021-07-01T04:43:10Z")
From the trace log looks like NVCSI/VI didn’t receive any validate data from MIPI bus. ---
**Author:** ![ChinoLuo](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChinoLuo](https://forums.developer.nvidia.com/u/ChinoLuo)\ **Post date:** [July 1, 2021, 5:25am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/14 "2021-07-01T05:25:08Z")
> [@ChinoLuo](#): > > `tegra-vi4 15700000.vi: dma_alloc_coherent of size 0 failed` > [@ShaneCCC](#): > > From the trace log looks like NVCSI/VI didn’t receive any validate data from MIPI bus. What is the posible reason of dma\_alloc\_coherent failed? ```auto tegra-vi4 15700000.vi: dma_alloc_coherent of size 0 failed ``` ---
**Author:** ![ShaneCCC](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shaneccc/32/14043_2.png) [@ShaneCCC](https://forums.developer.nvidia.com/u/ShaneCCC)\ **Post date:** [July 1, 2021, 6:56am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/15 "2021-07-01T06:56:43Z")
Looks like allocate DMA buffer failed. Have breakdown from …/kernel/kernel-4.9/drivers/media/v4l2-core/videobuf2-dma-contig.c ---
**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\ **Post date:** [September 5, 2021, 6:54am UTC](https://forums.developer.nvidia.com/t/tc358840-tegra-channel-init-subdevices-kernel-error/182304/17 "2021-09-05T06:54:03Z")
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