From f22926e06e1ab7aa5f5c532afa4591f3d9baf59c Mon Sep 17 00:00:00 2001 From: Laurent Pinchart 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 Acked-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- 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 cf5014f..04c9689 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]; -- 2.7.4