media: atmel: atmel-isc: create product specific v4l2 controls config

Create product specific callback for initializing v4l2 controls.
Call this from v4l2 controls init function.

[hverkuil: made isc_sama5d2_config_ctrls static]
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/atmel/atmel-isc-base.c

@@ -2051,11 +2051,12 @@ static int isc_ctrl_init(struct isc_device *isc)
 	if (ret < 0)
 		return ret;
 
+	/* Initialize product specific controls. For example, contrast */
+	isc->config_ctrls(isc, ops);
+
 	ctrls->brightness = 0;
-	ctrls->contrast = 256;
 
 	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0);
-	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
 	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, isc->gamma_max, 1,
 			  isc->gamma_max);
 	isc->awb_ctrl = v4l2_ctrl_new_std(hdl, &isc_awb_ops,

drivers/media/platform/atmel/atmel-isc.h

@@ -227,6 +227,8 @@ struct isc_reg_offsets {
  *			specific CBC module
  * @config_cc:		pointer to a function that initializes product
  *			specific CC module
+ * @config_ctrls:	pointer to a functoin that initializes product
+ *			specific v4l2 controls.
  *
  * @offsets:		struct holding the product specific register offsets
  */
@@ -301,6 +303,9 @@ struct isc_device {
 		void (*config_csc)(struct isc_device *isc);
 		void (*config_cbc)(struct isc_device *isc);
 		void (*config_cc)(struct isc_device *isc);
+
+		void (*config_ctrls)(struct isc_device *isc,
+				     const struct v4l2_ctrl_ops *ops);
 	};
 
 	struct isc_reg_offsets		offsets;

drivers/media/platform/atmel/atmel-sama5d2-isc.c

@@ -96,6 +96,17 @@ static void isc_sama5d2_config_cc(struct isc_device *isc)
 	regmap_write(regmap, ISC_CC_BB_OB, (1 << 8));
 }
 
+static void isc_sama5d2_config_ctrls(struct isc_device *isc,
+				     const struct v4l2_ctrl_ops *ops)
+{
+	struct isc_ctrls *ctrls = &isc->ctrls;
+	struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+
+	ctrls->contrast = 256;
+
+	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
+}
+
 /* Gamma table with gamma 1/2.2 */
 static const u32 isc_sama5d2_gamma_table[][GAMMA_ENTRIES] = {
 	/* 0 --> gamma 1/1.8 */
@@ -244,6 +255,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
 	isc->config_csc = isc_sama5d2_config_csc;
 	isc->config_cbc = isc_sama5d2_config_cbc;
 	isc->config_cc = isc_sama5d2_config_cc;
+	isc->config_ctrls = isc_sama5d2_config_ctrls;
 
 	isc->offsets.csc = ISC_SAMA5D2_CSC_OFFSET;
 	isc->offsets.cbc = ISC_SAMA5D2_CBC_OFFSET;