Am Mittwoch, 11. Februar 2009 14:26:23 schrieb Takashi Iwai:
At Wed, 11 Feb 2009 14:18:59 +0100,
Holger Dehnhardt wrote:
Dear Takashi,
thank you for your quick response! See my inline comments.
Am Mittwoch, 11. Februar 2009 13:08:22 schrieb Takashi Iwai:
At Tue, 10 Feb 2009 21:54:32 +0100,
Holger Dehnhardt wrote:
After some time I found the following bug:
static void snd_mtpav_inmidi_h(struct mtpav *mcrd, u8 inbyte) { if (inbyte >= 0xf8) { /* real-time midi code */ --> snd_mtpav_inmidi_process(mcrd, inbyte); //here the inmidiport is not translated to the prtnumber, so // snd_mtpav_inmidi_process the port with an index of some 80000 // in the ports array of the mtpav struct was called
Good catch. I think the patch below should fix the problem
Did you try my patch?
Sorry, Takashi, I'm still at work. I will try your path tonight when I'm home and my children are in bed;-)
The following change made the driver work: static void snd_mtpav_inmidi_h(struct mtpav *mcrd, u8 inbyte) { if (inbyte >= 0xf8) { /* real-time midi code */ mcrd->inmidiport = translate_hwport_to_subdevice(mcrd, inbyte);
This isn't correct since inbyte is supposed to be under 0x13.
Sorry, I don't understand what you mean: inbyte should always be lower than 0x13 or is the real time midi code always lower then 0x13?
I meant that the data passed to translate_hwport_to_subdevice() is supposed to be <= 0x13. In that code path, inbyte is >= 0xf8, thus you pass an invalid data.
After that I realised, that with the recent driver - even without my change - playing midi files din not work anymore. Only the first midi event was sent to the interface, everything else was dropped somewhere.
So a diff between the last workin version and the recent version showed only one change:
What was the last working version exactly?
1.0.18 (from the debian experimental repository)
Weird. There is really no essential change since that. Are you sure that you just copied 1.0.18 mtpav.c fixes the problem?
The only change I did was to change snd_card_create(...) back to snd_card_new(..) in the recent driver (1.0.19) to get the MIDI OUT working again.
After applying your patch I will go into this again.
Thanks
Holger