dc02d50a6d
Sliced VBI transfers use PIO instead of DMA. This was done inside the interrupt handler, but since PIO accesses are very slow this meant that a lot of time was spent inside the interrupt handler. All PIO copies are now moved to a workqueue. This should fix various issues with missing time ticks and remote key hits. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
27 lines
1.2 KiB
C
27 lines
1.2 KiB
C
/*
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Vertical Blank Interval support functions
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Copyright (C) 2004-2007 Hans Verkuil <hverkuil@xs4all.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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ssize_t ivtv_write_vbi(struct ivtv *itv, const char __user *ubuf, size_t count);
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void ivtv_process_vbi_data(struct ivtv *itv, struct ivtv_buffer *buf,
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u64 pts_stamp, int streamtype);
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int ivtv_used_line(struct ivtv *itv, int line, int field);
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void ivtv_disable_vbi(struct ivtv *itv);
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void ivtv_set_vbi(unsigned long arg);
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void ivtv_vbi_work_handler(struct ivtv *itv);
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