Hi Christian,
On Mon, 03 Mar 2003, Christian Schmidt-Madsen wrote:
> After an upgrade from Cord Seele's meteor2 driver v. 1.0 to v. 1.1 I am
> experiencing unpredictable errors. More specifically the problem occurs
> when I repeatedly grab a single image from a camera in a loop similar to
> this:
>
> while (condition) {
> ...
> n = read(v4l2->fd, img, v4l2->fmt.fmt.pix.sizeimage);
> ...
> condition = process_image();
> }
>
> This runs just fine for a while but then hangs in the read call. The
> debug output from the meteor2 driver is shown below. Since the error
> does not occur everytime I run the code (but on more than half of the
> executions) it is probably a timing/race problem.
>
> <log>
> Mar 3 14:58:15 vegan kernel: meteor2[via_v4l2_open]: new id: CAEEFE80
> flags: 0 512
> Mar 3 14:58:15 vegan kernel: meteor2[via_v4l2_read]: no filled buffer,
> start snapshot
> Mar 3 14:58:15 vegan kernel: meteor2[via_v4l2_read]: no buffers
> requested so far
> Mar 3 14:58:15 vegan kernel: meteor2[via_free_himem_bufs]: freeing 3
> stream_bufs @ c1362d80
> Mar 3 14:58:15 vegan kernel: meteor2[via_free_himem_bufs]: yanking buf 0
> Mar 3 14:58:15 vegan kernel: meteor2[via_free_himem_bufs]: buf 1 not queued
> Mar 3 14:58:15 vegan kernel: meteor2[via_free_himem_bufs]: buf 2 not queued
> Mar 3 14:58:15 vegan kernel: meteor2[unmap_stream_bufs]: unmapping 3
> bufs @ 0xc1362d80
> Mar 3 14:58:15 vegan kernel: meteor2[unmap_stream_bufs]: sbuf->virt:
> 0xd8a5f000
> Mar 3 14:58:15 vegan kernel: meteor2[unmap_stream_bufs]: sbuf->virt:
> 0xd8b90000
> Mar 3 14:58:15 vegan kernel: meteor2[unmap_stream_bufs]: sbuf->virt:
> 0xd8cc1000
> Mar 3 14:58:15 vegan kernel: meteor2[remap_stream_bufs]: mapping 3 bufs
> @ 0xc1362d80
> Mar 3 14:58:15 vegan kernel: meteor2[remap_stream_bufs]: addr->virt:
> 0xfc00000->0xd8a5f000
> Mar 3 14:58:15 vegan kernel: meteor2[remap_stream_bufs]: addr->virt:
> 0xfd30000->0xd8b90000
> Mar 3 14:58:15 vegan kernel: meteor2[remap_stream_bufs]: addr->virt:
> 0xfe60000->0xd8cc1000
> Mar 3 14:58:15 vegan kernel: meteor2[via_v4l2_read]: need to queue a
> DMA buffer
> Mar 3 14:58:15 vegan kernel: meteor2[via_handle_irq_eog]: INTERNAL
> ERROR: unexpected grab_state 3
> </log>
Please, provide a more detailed log from the beginning (dcf load) until the
error occurs and send it to me privately.
> grab_state 3 is STATE_G_PENDING which is set in via_snapshot_start() but
> this function is seemingly only used for streaming video?!
It's used in via_snapshot_start() _and_ via_streaming_start()... ??
Cord
