[PATCH v8 4/6] media: rockchip: rkisp1: reduce number of histogram grid elements in uapi

[Dafna Hirschfeld]

From: Heiko Stuebner <heiko.stuebner at theobroma-systems.com>

The uapi right now specifies an array size of 28 but the actual number
of elements is only 25 with the last 3 being unused.

Reduce the array size to the correct number of elements and change
the params code to iterate the array 25 times.

Signed-off-by: Heiko Stuebner <heiko.stuebner at theobroma-systems.com>
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld at collabora.com>
---
 drivers/media/platform/rockchip/rkisp1/rkisp1-params.c | 3 ++-
 include/uapi/linux/rkisp1-config.h                     | 3 +--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
index 6af4d551ffb5..021939466b24 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
@@ -589,7 +589,6 @@ static void rkisp1_hst_config(struct rkisp1_params *params,
 		RKISP1_CIF_ISP_HIST_WEIGHT_22TO03,
 		RKISP1_CIF_ISP_HIST_WEIGHT_13TO43,
 		RKISP1_CIF_ISP_HIST_WEIGHT_04TO34,
-		RKISP1_CIF_ISP_HIST_WEIGHT_44,
 	};
 	const u8 *weight;
 	unsigned int i;
@@ -622,6 +621,8 @@ static void rkisp1_hst_config(struct rkisp1_params *params,
 							    weight[2],
 							    weight[3]),
 				 hist_weight_regs[i]);
+
+	rkisp1_write(params->rkisp1, weight[0] & 0x1F, RKISP1_CIF_ISP_HIST_WEIGHT_44);
 }
 
 static void
diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
index 24f05d6d258f..35aa82d5f6dd 100644
--- a/include/uapi/linux/rkisp1-config.h
+++ b/include/uapi/linux/rkisp1-config.h
@@ -102,8 +102,7 @@
 /*
  * Histogram calculation
  */
-/* Last 3 values unused. */
-#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28
+#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 25
 
 /*
  * Defect Pixel Cluster Correction
-- 
2.17.1