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V4L/DVB (10433): cx18: Defer A/V core initialization until a valid cx18_av_cmd arrives

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Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls 2009-01-30 22:21:45 -03:00 committed by Mauro Carvalho Chehab
parent 49796e4059
commit e474200d35
1 changed files with 33 additions and 7 deletions
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40
drivers/media/video/cx18/cx18-av-core.c
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@ -680,19 +680,45 @@ static int set_v4lfmt(struct cx18 *cx, struct v4l2_format *fmt)
/* ----------------------------------------------------------------------- */
static int valid_av_cmd(unsigned int cmd)
{
switch (cmd) {
/* All commands supported by cx18_av_cmd() */
case VIDIOC_INT_DECODE_VBI_LINE:
case VIDIOC_INT_AUDIO_CLOCK_FREQ:
case VIDIOC_STREAMON:
case VIDIOC_STREAMOFF:
case VIDIOC_LOG_STATUS:
case VIDIOC_G_CTRL:
case VIDIOC_S_CTRL:
case VIDIOC_QUERYCTRL:
case VIDIOC_G_STD:
case VIDIOC_S_STD:
case AUDC_SET_RADIO:
case VIDIOC_INT_G_VIDEO_ROUTING:
case VIDIOC_INT_S_VIDEO_ROUTING:
case VIDIOC_INT_G_AUDIO_ROUTING:
case VIDIOC_INT_S_AUDIO_ROUTING:
case VIDIOC_S_FREQUENCY:
case VIDIOC_G_TUNER:
case VIDIOC_S_TUNER:
case VIDIOC_G_FMT:
case VIDIOC_S_FMT:
case VIDIOC_INT_RESET:
return 1;
default:
return 0;
}
return 0;
}
int cx18_av_cmd(struct cx18 *cx, unsigned int cmd, void *arg)
{
struct cx18_av_state *state = &cx->av_state;
struct v4l2_tuner *vt = arg;
struct v4l2_routing *route = arg;
/* ignore these commands */
switch (cmd) {
case TUNER_SET_TYPE_ADDR:
return 0;
}
if (!state->is_initialized) {
if (!state->is_initialized && valid_av_cmd(cmd)) {
CX18_DEBUG_INFO("cmd %08x triggered fw load\n", cmd);
/* initialize on first use */
state->is_initialized = 1;