Em Wed, 2 Mar 2016 09:50:31 -0700 Shuah Khan shuahkh@osg.samsung.com escreveu:
Change ALSA driver to use Media Controller API to share media resources with DVB and V4L2 drivers on a AU0828 media device. Media Controller specific initialization is done after sound card is registered. ALSA creates Media interface and entity function graph nodes for Control, Mixer, PCM Playback, and PCM Capture devices.
snd_usb_hw_params() will call Media Controller enable source handler interface to request the media resource. If resource request is granted, it will release it from snd_usb_hw_free(). If resource is busy, -EBUSY is returned.
Media specific cleanup is done in usb_audio_disconnect().
Signed-off-by: Shuah Khan shuahkh@osg.samsung.com Acked-by: Takashi Iwai tiwai@suse.de
Shuah, by looking at the produced graphs: https://mchehab.fedorapeople.org/mc-next-gen/au0828_test/
I'm noticing the lack of ALSA I/O entities in the diagram (MEDIA_ENT_F_AUDIO_CAPTURE). The mixer there is not connected.
Could you please check what's happening?
Those are the relevant dmesg data:
[ 19.017276] usbcore: registered new interface driver snd-usb-audio [ 230.706102] Linux video capture interface: v2.00 [ 230.856983] au0828: au0828 driver loaded [ 231.230612] au0828: i2c bus registered [ 231.822006] tveeprom 5-0050: Hauppauge model 72001, rev E1H3, serial# 4035199481 [ 231.822991] tveeprom 5-0050: MAC address is 00:0d:fe:84:41:f9 [ 231.823955] tveeprom 5-0050: tuner model is Xceive XC5000C (idx 173, type 88) [ 231.824782] tveeprom 5-0050: TV standards NTSC(M) ATSC/DVB Digital (eeprom 0x88) [ 231.825272] tveeprom 5-0050: audio processor is AU8522 (idx 44) [ 231.825276] tveeprom 5-0050: decoder processor is AU8522 (idx 42) [ 231.825280] tveeprom 5-0050: has no radio, has IR receiver, has no IR transmitter [ 231.825283] au0828: hauppauge_eeprom: hauppauge eeprom: model=72001 [ 231.857567] au8522 5-0047: creating new instance [ 231.857879] au8522_decoder creating new instance... [ 231.910525] tuner 5-0061: Setting mode_mask to 0x06 [ 231.910532] tuner 5-0061: tuner 0x61: Tuner type absent [ 231.910535] tuner 5-0061: Tuner -1 found with type(s) Radio TV. [ 231.911343] tuner 5-0061: Calling set_type_addr for type=88, addr=0x61, mode=0x04, config=ffffffffa0e64100 [ 231.911347] tuner 5-0061: defining GPIO callback [ 231.934896] xc5000 5-0061: creating new instance [ 231.954664] xc5000: Successfully identified at address 0x61 [ 231.954987] xc5000: Firmware has not been loaded previously [ 231.955327] tuner 5-0061: type set to Xceive XC5000 [ 231.955330] tuner 5-0061: au0828 tuner I2C addr 0xc2 with type 88 used for 0x04 [ 233.622614] au8522 5-0047: attaching existing instance [ 233.636061] xc5000 5-0061: attaching existing instance [ 233.645775] xc5000: Successfully identified at address 0x61 [ 233.646034] xc5000: Firmware has not been loaded previously [ 233.646461] DVB: registering new adapter (au0828) [ 233.647575] usb 2-3.3: DVB: registering adapter 0 frontend 0 (Auvitek AU8522 QAM/8VSB Frontend)... [ 233.648344] dvb_create_media_entity: media entity 'Auvitek AU8522 QAM/8VSB Frontend' registered. [ 233.656105] dvb_create_media_entity: media entity 'dvb-demux' registered. [ 234.166644] IR keymap rc-hauppauge not found [ 234.166962] Registered IR keymap rc-empty [ 234.178055] input: au0828 IR (Hauppauge HVR950Q) as /devices/pci0000:00/0000:00:14.0/usb2/2-3/2-3.3/rc/rc0/input14 [ 234.203311] rc rc0: au0828 IR (Hauppauge HVR950Q) as /devices/pci0000:00/0000:00:14.0/usb2/2-3/2-3.3/rc/rc0 [ 234.207828] au0828: Remote controller au0828 IR (Hauppauge HVR950Q) initalized [ 234.208270] au0828: Registered device AU0828 [Hauppauge HVR950Q] [ 234.212073] usbcore: registered new interface driver au0828 [ 234.230371] lirc_dev: IR Remote Control driver registered, major 243 [ 234.257555] rc rc0: lirc_dev: driver ir-lirc-codec (au0828-input) registered at minor = 0 [ 234.257960] IR LIRC bridge handler initialized
(as au0828 is blacklisted, snd-usb-audio was probed first)
====xxxx====
I'm also getting some other weird behavior when removing/reinserting the modules a few times. OK, officially we don't support it, but, as devices can be bind/unbind all the times, removing modules is a way to simulate such things. Also, I use it a lot while testing USB drivers ;)
This one is after removing both the media drivers and snd-usb-audio, and then modprobing snd-usb-audio:
[ 1839.510587] BUG: sleeping function called from invalid context at mm/slub.c:1289 [ 1839.510881] in_atomic(): 1, irqs_disabled(): 0, pid: 3479, name: modprobe [ 1839.511157] 4 locks held by modprobe/3479: [ 1839.511415] #0: (&dev->mutex){......}, at: [<ffffffff81ce8933>] __driver_attach+0xa3/0x160 [ 1839.512381] #1: (&dev->mutex){......}, at: [<ffffffff81ce8941>] __driver_attach+0xb1/0x160 [ 1839.512388] #2: (register_mutex#5){+.+.+.}, at: [<ffffffffa10596c7>] usb_audio_probe+0x257/0x1c90 [snd_usb_audio] [ 1839.512401] #3: (&(&mdev->lock)->rlock){+.+.+.}, at: [<ffffffffa0e6051b>] media_device_register_entity+0x1cb/0x700 [media] [ 1839.512412] CPU: 2 PID: 3479 Comm: modprobe Not tainted 4.5.0-rc3+ #49 [ 1839.512415] Hardware name: /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015 [ 1839.512417] 0000000000000000 ffff8803b3f6f288 ffffffff81933901 ffff8803c4bae000 [ 1839.512422] ffff8803c4bae5c8 ffff8803b3f6f2b0 ffffffff811c6af5 ffff8803c4bae000 [ 1839.512427] ffffffff8285d7f6 0000000000000509 ffff8803b3f6f2f0 ffffffff811c6ce5 [ 1839.512432] Call Trace: [ 1839.512436] [<ffffffff81933901>] dump_stack+0x85/0xc4 [ 1839.512440] [<ffffffff811c6af5>] ___might_sleep+0x245/0x3a0 [ 1839.512443] [<ffffffff811c6ce5>] __might_sleep+0x95/0x1a0 [ 1839.512446] [<ffffffff8155aade>] kmem_cache_alloc_trace+0x20e/0x300 [ 1839.512451] [<ffffffffa0e66e3d>] ? media_add_link+0x4d/0x140 [media] [ 1839.512455] [<ffffffffa0e66e3d>] media_add_link+0x4d/0x140 [media] [ 1839.512459] [<ffffffffa0e69931>] media_create_pad_link+0xa1/0x600 [media] [ 1839.512463] [<ffffffffa0fe11b3>] au0828_media_graph_notify+0x173/0x360 [au0828] [ 1839.512467] [<ffffffffa0e68a6a>] ? media_gobj_create+0x1ba/0x480 [media] [ 1839.512471] [<ffffffffa0e606fb>] media_device_register_entity+0x3ab/0x700 [media] [ 1839.512475] [<ffffffffa0e60350>] ? media_device_release_devres+0x10/0x10 [media] [ 1839.512479] [<ffffffff8124068d>] ? trace_hardirqs_on+0xd/0x10 [ 1839.512482] [<ffffffff8159f992>] ? create_object+0x5a2/0x940 [ 1839.512485] [<ffffffff8159f3f0>] ? kmemleak_disable+0x90/0x90 [ 1839.512489] [<ffffffff8159f3f0>] ? kmemleak_disable+0x90/0x90 [ 1839.512497] [<ffffffffa109722c>] ? media_snd_mixer_init+0x16c/0x500 [snd_usb_audio] [ 1839.512501] [<ffffffff8155f696>] ? kasan_unpoison_shadow+0x36/0x50 [ 1839.512504] [<ffffffff8155f70e>] ? kasan_kmalloc+0x5e/0x70 [ 1839.512511] [<ffffffffa1097352>] media_snd_mixer_init+0x292/0x500 [snd_usb_audio] [ 1839.512519] [<ffffffffa1097693>] media_snd_device_create+0xd3/0x2e0 [snd_usb_audio] [ 1839.512525] [<ffffffffa1059b05>] usb_audio_probe+0x695/0x1c90 [snd_usb_audio] [ 1839.512529] [<ffffffff8128b217>] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 1839.512536] [<ffffffffa1059470>] ? snd_usb_create_stream+0x4e0/0x4e0 [snd_usb_audio] [ 1839.512540] [<ffffffff812404fa>] ? trace_hardirqs_on_caller+0x40a/0x590 [ 1839.512543] [<ffffffff8124068d>] ? trace_hardirqs_on+0xd/0x10 [ 1839.512546] [<ffffffff81dbb1dd>] usb_probe_interface+0x45d/0x940 [ 1839.512550] [<ffffffff81ce7e7a>] driver_probe_device+0x21a/0xc30 [ 1839.512553] [<ffffffff81ce8890>] ? driver_probe_device+0xc30/0xc30 [ 1839.512556] [<ffffffff81ce89b1>] __driver_attach+0x121/0x160 [ 1839.512559] [<ffffffff81ce21bf>] bus_for_each_dev+0x11f/0x1a0 [ 1839.512562] [<ffffffff81ce20a0>] ? subsys_dev_iter_exit+0x10/0x10 [ 1839.512565] [<ffffffff822e7be7>] ? _raw_spin_unlock+0x27/0x40 [ 1839.512568] [<ffffffff81ce6cdd>] driver_attach+0x3d/0x50 [ 1839.512571] [<ffffffff81ce5df9>] bus_add_driver+0x4c9/0x770 [ 1839.512575] [<ffffffff81cea39c>] driver_register+0x18c/0x3b0 [ 1839.512578] [<ffffffff81250f92>] ? __raw_spin_lock_init+0x32/0x100 [ 1839.512581] [<ffffffff81db6e98>] usb_register_driver+0x1f8/0x440 [ 1839.512584] [<ffffffff810021a1>] ? do_one_initcall+0x131/0x300 [ 1839.512587] [<ffffffffa10d8000>] ? 0xffffffffa10d8000 [ 1839.512594] [<ffffffffa10d801e>] usb_audio_driver_init+0x1e/0x1000 [snd_usb_audio] [ 1839.512597] [<ffffffff810021b1>] do_one_initcall+0x141/0x300 [ 1839.512600] [<ffffffff81002070>] ? try_to_run_init_process+0x40/0x40 [ 1839.512603] [<ffffffff8155f696>] ? kasan_unpoison_shadow+0x36/0x50 [ 1839.512606] [<ffffffff8155f696>] ? kasan_unpoison_shadow+0x36/0x50 [ 1839.512609] [<ffffffff8155f7a7>] ? __asan_register_globals+0x87/0xa0 [ 1839.512613] [<ffffffff8144d8eb>] do_init_module+0x1d0/0x5ad [ 1839.512617] [<ffffffff812f27b6>] load_module+0x6666/0x9ba0 [ 1839.512620] [<ffffffff812e9e20>] ? symbol_put_addr+0x50/0x50 [ 1839.512627] [<ffffffff812ec150>] ? module_frob_arch_sections+0x20/0x20 [ 1839.512630] [<ffffffff815be010>] ? open_exec+0x50/0x50 [ 1839.512634] [<ffffffff8116716b>] ? ns_capable+0x5b/0xd0 [ 1839.512637] [<ffffffff812f5fe8>] SyS_finit_module+0x108/0x130 [ 1839.512640] [<ffffffff812f5ee0>] ? SyS_init_module+0x1f0/0x1f0 [ 1839.512643] [<ffffffff81004044>] ? lockdep_sys_exit_thunk+0x12/0x14 [ 1839.512647] [<ffffffff822e8636>] entry_SYSCALL_64_fastpath+0x16/0x76 [ 1839.514027] usbcore: registered new interface driver snd-usb-audio
And an extra kmemleak issue:
unreferenced object 0xffff8803bcbacf30 (size 128): comm "modprobe", pid 2625, jiffies 4294950803 (age 1715.788s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff822cf76e>] kmemleak_alloc+0x4e/0xb0 [<ffffffff8155ab06>] kmem_cache_alloc_trace+0x236/0x300 [<ffffffff81937eb2>] ida_pre_get+0x1a2/0x250 [<ffffffff81938005>] ida_simple_get+0xa5/0x170 [<ffffffffa0f1469a>] 0xffffffffa0f1469a [<ffffffffa0fe6951>] au0828_dvb_register+0xe21/0x12c0 [au0828] [<ffffffffa0fd1d92>] vb2_thread+0xbb2/0xc10 [videobuf2_core] [<ffffffff81dbb1dd>] usb_probe_interface+0x45d/0x940 [<ffffffff81ce7e7a>] driver_probe_device+0x21a/0xc30 [<ffffffff81ce89b1>] __driver_attach+0x121/0x160 [<ffffffff81ce21bf>] bus_for_each_dev+0x11f/0x1a0 [<ffffffff81ce6cdd>] driver_attach+0x3d/0x50 [<ffffffff81ce5df9>] bus_add_driver+0x4c9/0x770 [<ffffffff81cea39c>] driver_register+0x18c/0x3b0 [<ffffffff81db6e98>] usb_register_driver+0x1f8/0x440 [<ffffffffa0fb80b7>] au8522_get_frontend+0xb7/0x160 [au8522_dig]
I did one extra module removal/reinsert, and this time, I got lots of bugs. Full dmesg is at: http://pastebin.com/LEX5LD5K
The Kernel hanged after a while with (at the serial console - with kind of explain why the message is truncated):
[ 2117.282666] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#2] SMP KASAN [ 2117.284074] Modules linked in: videobuf2_v4l2 videobuf2_core tveeprom dvb_core rc_core v4l2_common videodev snd_usb_audio media cpufreq_powersave cpufreq_conservative cpufreq_userspace cpufreq_stats parport_pc ppdev lp parport snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel iTCO_wdt iTCO_vendor_support kvm irqbypass crct10dif_pclmul crc32_