linux-kernel - [PATCH 20/21] media: atmel: atmel-isc-base: add wb debug messages

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Date:   Fri, 22 Oct 2021 10:52:46 +0300
From:   Eugen Hristev <eugen.hristev@...rochip.com>
To:     <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <jacopo@...ndi.org>, <laurent.pinchart@...asonboard.com>,
        <sakari.ailus@....fi>, <robh+dt@...nel.org>,
        <nicolas.ferre@...rochip.com>,
        Eugen Hristev <eugen.hristev@...rochip.com>
Subject: [PATCH 20/21] media: atmel: atmel-isc-base: add wb debug messages

Add debug messages that make it easier to debug white balance algorithm.

Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
---
 drivers/media/platform/atmel/atmel-isc-base.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
index 7ebe0a2d130f..071ac5eec7ec 100644
--- a/drivers/media/platform/atmel/atmel-isc-base.c
+++ b/drivers/media/platform/atmel/atmel-isc-base.c
@@ -1330,10 +1330,15 @@ static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
 
 	if (!*min)
 		*min = 1;
+
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "isc wb: hist_id %u, hist_count %u",
+		 ctrls->hist_id, *hist_count);
 }
 
 static void isc_wb_update(struct isc_ctrls *ctrls)
 {
+	struct isc_device *isc = container_of(ctrls, struct isc_device, ctrls);
 	u32 *hist_count = &ctrls->hist_count[0];
 	u32 c, offset[4];
 	u64 avg = 0;
@@ -1350,6 +1355,9 @@ static void isc_wb_update(struct isc_ctrls *ctrls)
 		(u64)hist_count[ISC_HIS_CFG_MODE_GB];
 	avg >>= 1;
 
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "isc wb: green components average %llu\n", avg);
+
 	/* Green histogram is null, nothing to do */
 	if (!avg)
 		return;
@@ -1402,9 +1410,15 @@ static void isc_wb_update(struct isc_ctrls *ctrls)
 		else
 			gw_gain[c] = 1 << 9;
 
+		v4l2_dbg(1, debug, &isc->v4l2_dev,
+			 "isc wb: component %d, s_gain %u, gw_gain %u\n",
+			 c, s_gain[c], gw_gain[c]);
 		/* multiply both gains and adjust for decimals */
 		ctrls->gain[c] = s_gain[c] * gw_gain[c];
 		ctrls->gain[c] >>= 9;
+		v4l2_dbg(1, debug, &isc->v4l2_dev,
+			 "isc wb: component %d, final gain %u\n",
+			 c, ctrls->gain[c]);
 	}
 }
 
@@ -1424,6 +1438,10 @@ static void isc_awb_work(struct work_struct *w)
 		return;
 
 	isc_hist_count(isc, &min, &max);
+
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "isc wb mode %d: hist min %u , max %u\n", hist_id, min, max);
+
 	ctrls->hist_minmax[hist_id][HIST_MIN_INDEX] = min;
 	ctrls->hist_minmax[hist_id][HIST_MAX_INDEX] = max;
 
-- 
2.25.1