[PATCH v8 3/6] media: rkisp1: stats: mask the hist_bins values

[Dafna Hirschfeld]

hist_bins is an array of type __u32. Each entry represents
a 20 bit value. So mask out the unused bits.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld at collabora.com>
---
 drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h  | 1 +
 drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c | 8 +++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
index 8a8d960a679c..fa33080f51db 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
@@ -365,6 +365,7 @@
 #define RKISP1_CIF_ISP_MAX_HIST_PREDIVIDER		0x0000007F
 #define RKISP1_CIF_ISP_HIST_ROW_NUM			5
 #define RKISP1_CIF_ISP_HIST_COLUMN_NUM			5
+#define RKISP1_CIF_ISP_HIST_GET_BIN(x)			((x) & 0x000FFFFF)
 
 /* AUTO FOCUS MEASUREMENT:  ISP_AFM_CTRL */
 #define RKISP1_ISP_AFM_CTRL_ENABLE			BIT(0)
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
index 4cdb180fa64d..3b2783700abc 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
@@ -233,9 +233,11 @@ static void rkisp1_stats_get_hst_meas(struct rkisp1_stats *stats,
 	unsigned int i;
 
 	pbuf->meas_type |= RKISP1_CIF_ISP_STAT_HIST;
-	for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX; i++)
-		pbuf->params.hist.hist_bins[i] =
-			rkisp1_read(rkisp1, RKISP1_CIF_ISP_HIST_BIN_0 + i * 4);
+	for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX; i++) {
+		u32 reg_val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_HIST_BIN_0 + i * 4);
+
+		pbuf->params.hist.hist_bins[i] = RKISP1_CIF_ISP_HIST_GET_BIN(reg_val);
+	}
 }
 
 static void rkisp1_stats_get_bls_meas(struct rkisp1_stats *stats,
-- 
2.17.1