T113的SPIDEV只能发送几次，就卡住了？

钟工 LV 7

使用spidev_test进行测试，发现前面几次可以成功收发，使用示波器可以观察到正确的波形，然后spidev_test应用就卡住了，试过程如下，为了避免console被卡住，把测试放在后台：

#spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678&
[1] 1114
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678&
[2] 1116
[1]   Done                    spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678&
[3] 1117
[2]   Done                    spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678&
[4] 1118
[3]   Done                    spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678&
[5] 1120
[4]   Done                    spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678&
[6] 1121
[5]   Done                    spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678&
[7] 1122
[6]   Done                    spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)

spidev_test应用被卡住，没有数据输出，应该是spi的驱动没有返回

# ps
PID   USER     COMMAND
    1 root     init [3]
    2 root     [kthreadd]
    3 root     [rcu_gp]
    4 root     [rcu_par_gp]
    5 root     [kworker/0:0-eve]
    6 root     [kworker/0:0H-kb]
    7 root     [kworker/u4:0-ev]
    8 root     [mm_percpu_wq]
    9 root     [ksoftirqd/0]
   10 root     [rcu_preempt]
   11 root     [migration/0]
   12 root     [cpuhp/0]
   13 root     [kdevtmpfs]
   14 root     [kworker/u4:1-ev]
   16 root     [rcu_tasks_kthre]
   26 root     [kworker/0:1-eve]
  420 root     [oom_reaper]
  421 root     [writeback]
  455 root     [kblockd]
  529 root     [kworker/u4:2-ev]
  593 root     [ion_system_heap]
  615 root     [watchdogd]
  710 root     [cfg80211]
  714 root     [spi0]
  725 root     [kswapd0]
  737 root     [vsync proc 0]
  738 root     [vsync proc 1]
  795 root     [uas]
  835 root     [rc0]
  862 root     [irq/40-mmc0]
  864 root     [irq/202-4020000]
  866 root     [kworker/0:2-eve]
  867 root     [irq/41-mmc1]
  873 root     [kworker/0:3-eve]
  888 root     [mmc_complete]
  892 root     [kworker/0:1H-kb]
  901 root     [ipv6_addrconf]
  916 root     [krfcommd]
  953 root     [usb-hardware-sc]
  956 root     [goodix_wq]
  969 root     [kworker/0:2H-kb]
  970 root     [jbd2/mmcblk0p5-]
  971 root     [ext4-rsv-conver]
 1009 root     /sbin/syslogd -n
 1013 root     /sbin/klogd -n
 1024 root     /sbin/udevd -d
 1092 root     /usr/bin/swupdate -v -w -r /var/www/swupdate -p 8080
 1093 root     -bash
 1099 root     /usr/bin/swupdate-progress -w -r
 1105 root     /usr/bin/swupdate -v -w -r /var/www/swupdate -p 8080
 1122 root     spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
 1124 root     ps
# cat /proc/1122/status
Name:   spidev_test
Umask:  0022
State:  R (running)
Tgid:   1122
Ngid:   0
Pid:    1122
PPid:   1093
TracerPid:      0
Uid:    0       0       0       0
Gid:    0       0       0       0
FDSize: 256
Groups: 0 10
VmPeak:     1352 kB
VmSize:     1352 kB
VmLck:         0 kB
VmPin:         0 kB
VmHWM:       132 kB
VmRSS:       132 kB
RssAnon:              28 kB
RssFile:             104 kB
RssShmem:              0 kB
VmData:      168 kB
VmStk:       132 kB
VmExe:         8 kB
VmLib:       964 kB
VmPTE:         8 kB
VmSwap:        0 kB
CoreDumping:    0
THP_enabled:    0
Threads:        1
SigQ:   0/726
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000000000
SigCgt: 0000000000000000
CapInh: 0000000000000000
CapPrm: 0000003fffffffff
CapEff: 0000003fffffffff
CapBnd: 0000003fffffffff
CapAmb: 0000000000000000
NoNewPrivs:     0
Speculation_Store_Bypass:       unknown
Cpus_allowed:   3
Cpus_allowed_list:      0-1
voluntary_ctxt_switches:        0
nonvoluntary_ctxt_switches:     1398

硬件平台是 MQ-R（T113）， dts中配置如下，只
使用了CLK， CS， MISO， MOSI4根线

sun8iw20p1-t113-100ask-t113-pro.dts

-------------------------------------------
        spi0_pins_a: spi0@0 {
                pins = "PC2", "PC4", "PC5"; /*clk mosi miso*/
                function = "spi0";
                drive-strength = <10>;
        };

        spi0_pins_b: spi0@1 {
                pins = "PC3";
                function = "spi0";
                drive-strength = <10>;
                bias-pull-up;   /* only CS should be pulled up */
        };

        spi0_pins_c: spi0@2 {
                pins = "PC2", "PC3", "PC4", "PC5";
                function = "gpio_in";
                drive-strength = <10>;
        };

&spi0 {
        clock-frequency = <100000000>;
        pinctrl-0 = <&spi0_pins_a &spi0_pins_b>;
        pinctrl-1 = <&spi0_pins_c>;
        pinctrl-names = "default", "sleep";
        /*spi-supply = <&reg_dcdc1>;*/
        spi_slave_mode = <0>;
        spi0_cs_number = <1>;
        spi0_cs_bitmap = <1>;
        status = "okay";

        spi_board0@0 {
                device_type = "spi_board0";
                compatible = "rohm,dh2228fv";
                spi-max-frequency = <0x5f5e100>;
                reg = <0x0>;
                spi-rx-bus-width = <0x01>;
                spi-tx-bus-width = <0x01>;
                status = "okay";
        };
};

在D1s平台上测试也有类似的问题，各位大侠，是否遇到这个情况，请指点一下，谢谢！

柚木鉉 LV 9

echo 255 > /sys/module/spi_sunxi/parameters/debug 开调试看一下

钟工 LV 7

@yuzukitsuru 谢谢大侠回复

# echo 255 > /sys/module/spi_sunxi/parameters/debug
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
[   96.048082] spi_set_clk()532 - set spi clock 100000000, mclk 1000000
[   96.055418] spi_set_clk()532 - set spi clock 100000000, mclk 100000000
[   96.062767] spi_set_clk()532 - set spi clock 1000000, mclk 100000000
spi mode: 0x0[   96.071087] sunxi_spi_transfer_one()1637 - [spi0] begin transfer, txbuf 684e7dd8, rxbuf 989b57fc, len 8

bits per word: 8
max speed: 1000000 Hz (1000 KHz)
[   96.083098] sunxi_spi_mode_check()1313 - [spi0] Single mode Full duplex tx & rx
[   96.095818] sunxi_spi_transfer_one()1674 - [spi0] dump reg:
[   96.102085] 0x04025000: 00010001 00000083 00002044 00000000
[   96.108655] 0x04025010: 00001700 00000032 00200020 00000000
[   96.115268] 0x04025020: 00000000 00000002 00002000 00000000
[   96.121632] 0x04025030: 00000008 00000008 00000008 00000000
[   96.128206] sunxi_spi_dma_transfer()1551 - [spi0] rx and tx -> by ahb
[   96.135668] sunxi_spi_cpu_writel()1417 - t->len = 8
[   96.141155] 000: 31 32 33 34 35 36 37 38
[   96.145935] sunxi_spi_cpu_readl()1386 - t->len = 8
[   96.145945] sunxi_spi_handler()1728 - [spi0] irq status = 1033
[   96.157855] sunxi_spi_handler()1744 - [spi0] SPI TC comes
[   96.164245] 000: ff ff ff ff ff ff ff ff
[   96.168751] sunxi_spi_transfer_one()1685 - [spi0] dump reg:
[   96.175279] 0x04025000: 00010001 00000083 00002044 00000000
[   96.181640] 0x04025010: 00000000 00000032 00200020 00000000
[   96.188197] 0x04025020: 00000000 00000002 00002000 00000000
[   96.194687] 0x04025030: 00000000 00000000 00000000 00000000
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........

重复几十次测试，没有卡住，我就要下面命令加大收发数据量，也不会卡住

spi-pipe --device=/dev/spidev0.0 -b 8 -n 256 -s 1000000 < /dev/zero

然后我再把调试关闭，重复几次，很快就复现原来的问题

# echo 0 > /sys/module/spi_sunxi/parameters/debug
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)
TX | 31 32 33 34 35 36 37 38 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | 12345678
RX | FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  | ........
# spidev_test -D /dev/spidev0.0 -v -s 1000000 -p 12345678
spi mode: 0x0
bits per word: 8
max speed: 1000000 Hz (1000 KHz)

卡住了，后面没有输出了

我用示波器观察，最后一次卡住时，也是有波形的，感觉spi的驱动没有收到传输结束中断，调试输出可能会影响到中断的设置时序，请大侠帮助分析分析，谢谢！

在T113/D1s上都可以重现，我对比了一下它们驱动sunxi_spi.c是相同的

T113的软件版本
https://gitee.com/weidongshan/buildroot_100ask_t113-pro

F133的软件版本
https://github.com/YuzukiHD/Buildroot-YuzukiSBC

yy_fly LV 4

@zhongtao1701 我也有碰到了同样的问题 spi原厂驱动有问题

JauneNahy LV 3

你好，请问最后的原因找到了吗？是因为中断的问题而导致进程卡死的吗。如果找到原因了麻烦解答一下，谢谢。

JauneNahy LV 3

@zhongtao1701 你好，请问最后的原因找到了吗？是因为中断的问题而导致进程卡死的吗。如果找到原因了麻烦解答一下，谢谢。

wangkonglaosong LV 3

D1s上spi操作有同样的问题，而且spi驱动里的函数执行卡死后，没有任何结束进程的方式。不知道全志解决这个spi驱动的问题了没有