On 01/18/2014 04:12 PM, Daniel Mack wrote: > On 01/17/2014 05:27 PM, Ezequiel Garcia wrote: >> On Sun, Dec 22, 2013 at 02:59:45AM -0300, Ezequiel Garcia wrote: >>> While doing some experiments with the stk1160 driver (for "Easycap" TV video >>> capture devices), ran into problems using v3.13-rc4. The problem is that the >>> stk1160 IRQ handler receives no URBs at all. [...] > Let me know if you find anything - I hope to find some time to do > similar tests on AM33xx based hardware. I tried using an USB headset connected to a AM33xx based board, using kernel v3.13. The good news is that aplay gives me sound, so there's nothing generally wrong with isochronous streams on musb_dsps/cppi41. I can also do some simple 'arecord | aplay' loopback, and I can hear the microphone signal, but the stream breaks down after a couple of seconds, showing the following error: [ 433.671757] ALSA sound/core/pcm_lib.c:1945 capture write error (DMA or IRQ trouble?) Also, when tearing down the aplay stream, the cppi41 driver spits a number of the warnings below. Sebastian, do you have any pending patches that might be worth testing? Thanks, Daniel [ 340.255651] ------------[ cut here ]------------ [ 340.262828] WARNING: CPU: 0 PID: 112 at drivers/dma/cppi41.c:605 cppi41_dma_control+0x2a8/0x2d4() [ 340.272086] Modules linked in: [ 340.287140] CPU: 0 PID: 112 Comm: aplay Tainted: G W 3.13.0-00051-gff62d1c #1661 [ 340.295798] [<c00137b8>] (unwind_backtrace+0x0/0xf4) from [<c001158c>] (show_stack+0x10/0x14) [ 340.304712] [<c001158c>] (show_stack+0x10/0x14) from [<c0037154>] (warn_slowpath_common+0x6c/0x84) [ 340.314070] [<c0037154>] (warn_slowpath_common+0x6c/0x84) from [<c0037208>] (warn_slowpath_null+0x1c/0x24) [ 340.324153] [<c0037208>] (warn_slowpath_null+0x1c/0x24) from [<c02b50d8>] (cppi41_dma_control+0x2a8/0x2d4) [ 340.334255] [<c02b50d8>] (cppi41_dma_control+0x2a8/0x2d4) from [<c0375f0c>] (cppi41_dma_channel_abort+0xcc/0) [ 340.344976] [<c0375f0c>] (cppi41_dma_channel_abort+0xcc/0x140) from [<c037187c>] (musb_cleanup_urb.isra.16+0) [ 340.356147] [<c037187c>] (musb_cleanup_urb.isra.16+0x58/0x11c) from [<c0371b80>] (musb_urb_dequeue+0xe8/0x12) [ 340.366595] [<c0371b80>] (musb_urb_dequeue+0xe8/0x128) from [<c035aa74>] (unlink1+0x2c/0x110) [ 340.375497] [<c035aa74>] (unlink1+0x2c/0x110) from [<c035b2e0>] (usb_hcd_unlink_urb+0x50/0xc4) [ 340.384496] [<c035b2e0>] (usb_hcd_unlink_urb+0x50/0xc4) from [<c03db53c>] (deactivate_urbs+0xd8/0xf4) [ 340.394126] [<c03db53c>] (deactivate_urbs+0xd8/0xf4) from [<c03dc614>] (snd_usb_endpoint_stop+0x30/0x70) [ 340.404032] [<c03dc614>] (snd_usb_endpoint_stop+0x30/0x70) from [<c03e3d40>] (stop_endpoints+0x70/0x88) [ 340.413843] [<c03e3d40>] (stop_endpoints+0x70/0x88) from [<c03e3ea0>] (snd_usb_substream_playback_trigger+0x) [ 340.424836] [<c03e3ea0>] (snd_usb_substream_playback_trigger+0x9c/0xb8) from [<c03cdb40>] (snd_pcm_do_stop+0) [ 340.435917] [<c03cdb40>] (snd_pcm_do_stop+0x54/0x58) from [<c03cd768>] (snd_pcm_action_single+0x38/0x78) [ 340.445816] [<c03cd768>] (snd_pcm_action_single+0x38/0x78) from [<c03cd970>] (snd_pcm_drop+0x6c/0xc4) [ 340.455443] [<c03cd970>] (snd_pcm_drop+0x6c/0xc4) from [<c03cf22c>] (snd_pcm_common_ioctl1+0xc90/0x109c) [ 340.465344] [<c03cf22c>] (snd_pcm_common_ioctl1+0xc90/0x109c) from [<c03cf7f0>] (snd_pcm_playback_ioctl1+0x1) [ 340.476434] [<c03cf7f0>] (snd_pcm_playback_ioctl1+0x1b8/0x4b0) from [<c00e7a60>] (do_vfs_ioctl+0x3fc/0x5f0) [ 340.486607] [<c00e7a60>] (do_vfs_ioctl+0x3fc/0x5f0) from [<c00e7cc4>] (SyS_ioctl+0x70/0x80) [ 340.495331] [<c00e7cc4>] (SyS_ioctl+0x70/0x80) from [<c000e340>] (ret_fast_syscall+0x0/0x48) [ 340.504136] ---[ end trace 521a83c0d2567bbb ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
