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[media] omap3isp: preview: Optimize parameters setup for the common case

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If no parameter needs to be modified, make preview_config() and
preview_setup_hw() return immediately. This speeds up interrupt handling
in the common case.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2012-03-26 10:24:50 -03:00 committed by Mauro Carvalho Chehab
parent 213cf90b9a
commit f22926e06e
1 changed files with 6 additions and 0 deletions
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6
drivers/media/video/omap3isp/isppreview.c
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@ -889,6 +889,9 @@ static int preview_config(struct isp_prev_device *prev,
struct preview_update *attr;
int i, bit, rval = 0;
if (cfg->update == 0)
return 0;
params = &prev->params;
if (prev->state != ISP_PIPELINE_STREAM_STOPPED) {
@ -944,6 +947,9 @@ static void preview_setup_hw(struct isp_prev_device *prev)
int i, bit;
void *param_ptr;
if (prev->update == 0)
return;
for (i = 0; i < ARRAY_SIZE(update_attrs); i++) {
attr = &update_attrs[i];