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.pinch...@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ai...@iki.fi>
---
drivers/media/video/omap3isp/isppreview.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/omap3isp/isppreview.c
b/drivers/media/video/omap3isp/isppreview.c
index cf5014f..2b5c137 100644
--- a/drivers/media/video/omap3isp/isppreview.c
+++ b/drivers/media/video/omap3isp/isppreview.c
@@ -890,6 +890,8 @@ static int preview_config(struct isp_prev_device *prev,
int i, bit, rval = 0;
params = &prev->params;
+ if (cfg->update == 0)
+ return 0;
if (prev->state != ISP_PIPELINE_STREAM_STOPPED) {
unsigned long flags;
@@ -944,6 +946,9 @@ static void preview_setup_hw(struct isp_prev_device *prev)
int i, bit;
void *param_ptr;
+ if (params->update == 0)
+ return;
+
for (i = 0; i < ARRAY_SIZE(update_attrs); i++) {
attr = &update_attrs[i];
--
1.7.3.4
--
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