isp: Add histogram supporthistogram

Support enabling the histogram statistics engine and retrieving
histogram data. Histogram data is currently ignored in the image quality
tuning implementation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/iq.c b/iq.c
index dd85cfc..41fa90d 100644
--- a/iq.c
+++ b/iq.c
@@ -94,6 +94,12 @@ void iq_aewb_process(struct iq_tuning *iq,
 	omap3_isp_sensor_set_gain(iq->isp, iqp->gain);
 }
 
+void iq_histogram_process(struct iq_tuning *iq __attribute__((__unused__)),
+			  const struct omap3_isp_histogram_stats *stats __attribute__((__unused__)))
+{
+	printf("hist: data received\n");
+}
+
 /**
  * iq_params_init - Initialize IQ parameters
  * @params: IQ parameters
@@ -223,7 +229,8 @@ struct iq_tuning *iq_init(struct omap3_isp_device *isp,
 	window.height = params->window.height * format.height;
 
 	omap3_isp_aewb_configure(isp, &window, iq->pix_max - iq->params.black_level - 1);
-	omap3_isp_stats_enable(isp, true);
+	omap3_isp_histogram_configure(isp, &window);
+	omap3_isp_stats_enable(isp, OMAP3_ISP_STAT_AEWB | OMAP3_ISP_STAT_HIST);
 
 	return iq;
 }