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https://github.com/edk2-porting/linux-next.git
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abb096de82
cx18: Avoid making firmware API calls with the queue lock held. The source of MPEG strem corruption when not holding the queue lock was found to be that the MPEG buffer could be retrieved by the user app before it was sync'ed for the host cpu. Incoming buffers are now sync'ed before being put on q_full and releasing the queue lock. We can thus avoid the sometimes lengthy call to the firmware for CPU_DE_SET_MDL while holding the queue lock, so we can get better performance. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
/*
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* cx18 init/start/stop/exit stream functions
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*
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* Derived from ivtv-streams.h
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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* Copyright (C) 2008 Andy Walls <awalls@radix.net>
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*
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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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*
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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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*
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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
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* 02111-1307 USA
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*/
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u32 cx18_find_handle(struct cx18 *cx);
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struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle);
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int cx18_streams_setup(struct cx18 *cx);
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int cx18_streams_register(struct cx18 *cx);
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void cx18_streams_cleanup(struct cx18 *cx, int unregister);
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/* Capture related */
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void cx18_stream_load_fw_queue(struct cx18_stream *s);
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struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s,
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struct cx18_buffer *buf);
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int cx18_start_v4l2_encode_stream(struct cx18_stream *s);
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int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end);
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void cx18_stop_all_captures(struct cx18 *cx);
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