From f22926e06e1ab7aa5f5c532afa4591f3d9baf59c Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Mon, 26 Mar 2012 10:24:50 -0300
Subject: [PATCH] [media] omap3isp: preview: Optimize parameters setup for the
common case
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>
---
drivers/media/video/omap3isp/isppreview.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/media/video/omap3isp/isppreview.c b/drivers/media/video/omap3isp/isppreview.c
index cf5014f2302d1..04c96899f005d 100644
--- a/drivers/media/video/omap3isp/isppreview.c
+++ b/drivers/media/video/omap3isp/isppreview.c
@@ -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];
--
2.30.2