Dear All, I am trying to develop a driver for the sta321mp audio processor. Many of the details are in this previous thread:
https://groups.google.com/forum/#!searchin/beagleboard/fakufaku%7Csort:relevance/beagleboard/pptZ_9PTqMY/Hy4Wh4kK0gUJ I am now trying to port this driver a more recent version of the kernel, v4.4.19 at the moment. I have done that using the ti-linux-kernel-dev repository from Robert C Nelson but I am having some trouble with the davinci_mcasp_hw_params routine giving a division by zero in the kernel error. I was wondering if it is a known bug in the current kernel, or something that I introduced. I have tried to look through the mcasp code to see where it could come from but have been unsuccessful so far. root@beaglebone:~# echo BB-BONE-STA321MP > $SLOTS > root@beaglebone:~# dmesg [ 187.864668] bone_capemgr bone_capemgr: part_number 'BB-BONE-STA321MP', > version 'N/A' > [ 187.864888] bone_capemgr bone_capemgr: slot #4: override > [ 187.864931] bone_capemgr bone_capemgr: Using override eeprom data at > slot 4 > [ 187.864978] bone_capemgr bone_capemgr: slot #4: 'Override Board > Name,00A0,Override Manuf,BB-BONE-STA321MP' > [ 187.914755] rtc-ds1307 1-0068: SET TIME! > [ 187.923075] rtc-ds1307 1-0068: rtc core: registered ds1338 as rtc1 > [ 187.923159] rtc-ds1307 1-0068: 56 bytes nvram > [ 187.924043] sta321mp: probing i2c > [ 187.924078] sta321mp: Setting up device through i2c. > [ 187.924526] omap_i2c 4802a000.i2c: bus 1 rev0.11 at 100 kHz > [ 187.948010] sta321mp: newboard config. > [ 188.079389] lm75 1-0048: hwmon0: sensor 'tmp275' > [ 188.308022] sta321mp: probing. > [ 188.308181] sta321mp: init setting clocks. > [ 188.308193] sta321mp: using cpu 48038000.mcasp > [ 188.310768] davinci_evm ocp:sound: sta321mp-audio <-> 48038000.mcasp > mapping ok > [ 188.325125] bone_capemgr bone_capemgr: slot #4: dtbo > 'BB-BONE-STA321MP-00A0.dtbo' loaded; overlay id #0 > root@beaglebone:~# arecord -c 6 -d 5 -r 48000 -t wav -f S32_LE test.wav -vvv > Recording WAVE 'test.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, > Channels 6 > Plug PCM: Hardware PCM card 0 'STA321MP EVM' device 0 subdevice 0 > Its setup is: > stream : CAPTURE > access : RW_INTERLEAVED > format : S32_LE > subformat : STD > channels : 6 > rate : 48000 > exact rate : 48000 (48000/1) > msbits : 32 > buffer_size : 5460 > period_size : 1365 > period_time : 28437 > tstamp_mode : NONE > period_step : 1 > avail_min : 1365 > period_event : 0 > start_threshold : 1 > stop_threshold : 5460 > silence_threshold: 0 > silence_size : 0 > boundary : 1431306240 > appl_ptr : 0 > hw_ptr : 0 > Max peak (8190 samples): 0x00001000 # 0% > Max peak (8190 samples): 0x00001000 # 0% > Max peak (8190 samples): 0x00001000 # 0% > root@beaglebone:~# dmesg > [ 341.527405] evm_sta321mp_hw_params: Starting operations. > [ 341.527461] bclk (from params): 9216000 > [ 341.527483] sysclk: 12288000 > [ 341.527502] bclk: 3072000 > [ 341.527545] sta321mp: newboard config. > [ 341.931465] 4 bytes > [ 341.931498] sta321mp: setting fmt bits to 20 > [ 341.931852] sta321mp: Started at 48000 Hz. > [ 341.931874] slots: 2 > [ 341.931895] active serializers: 3 > [ 341.931905] Division by zero in kernel. > [ 341.935832] CPU: 0 PID: 657 Comm: arecord Not tainted 4.4.17-ti-r40 #12 > [ 341.935844] Hardware name: Generic AM33XX (Flattened Device Tree) > [ 341.935894] [<c0015c5d>] (unwind_backtrace) from [<c0012431>] > (show_stack+0x11/0x14) > [ 341.935921] [<c0012431>] (show_stack) from [<c03cad4f>] > (dump_stack+0x6f/0x7c) > [ 341.935942] [<c03cad4f>] (dump_stack) from [<c03c9d17>] (Ldiv0+0x9/0x12) > [ 341.935961] [<c03c9d17>] (Ldiv0) from [<c03c9d01>] > (__aeabi_idivmod+0x9/0x16) > [ 341.935995] [<c03c9d01>] (__aeabi_idivmod) from [<c06137c7>] > (davinci_mcasp_hw_params+0x66f/0x68c) > [ 341.936018] [<c06137c7>] (davinci_mcasp_hw_params) from [<c060dc2b>] > (soc_dai_hw_params+0x17/0x34) > [ 341.936037] [<c060dc2b>] (soc_dai_hw_params) from [<c060de67>] > (soc_pcm_hw_params+0x21f/0x388) > [ 341.936066] [<c060de67>] (soc_pcm_hw_params) from [<c05fb8e7>] > (snd_pcm_hw_params+0x8b/0x270) > [ 341.936087] [<c05fb8e7>] (snd_pcm_hw_params) from [<c05fc7c5>] > (snd_pcm_common_ioctl1+0x3f5/0xc14) > [ 341.936109] [<c05fc7c5>] (snd_pcm_common_ioctl1) from [<c05fd6ab>] > (snd_pcm_capture_ioctl1+0x203/0x488) > [ 341.936135] [<c05fd6ab>] (snd_pcm_capture_ioctl1) from [<c0145eed>] > (do_vfs_ioctl+0x349/0x528) > [ 341.936156] [<c0145eed>] (do_vfs_ioctl) from [<c0146119>] > (SyS_ioctl+0x4d/0x58) > [ 341.936180] [<c0146119>] (SyS_ioctl) from [<c000ec41>] > (ret_fast_syscall+0x1/0x52) > [ 341.936193] Total slots: 2 > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/6387361f-df3a-4e63-b33f-804669e79b28%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
