Add debug messages that make it easier to debug white balance algorithm.
Signed-off-by: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
---
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
