[media] m5mols: Add JPEG compression quality control

Add JPEG compression quality control for snapshot capture.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/m5mols/m5mols.h

@@ -172,6 +172,7 @@ struct m5mols_version {
  * @zoom: zoom control
  * @wdr: wide dynamic range control
  * @stabilization: image stabilization control
+ * @jpeg_quality: JPEG compression quality control
  * @ver: information of the version
  * @cap: the capture mode attributes
  * @power: current sensor's power status
@@ -213,6 +214,7 @@ struct m5mols_info {
 	struct v4l2_ctrl *zoom;
 	struct v4l2_ctrl *wdr;
 	struct v4l2_ctrl *stabilization;
+	struct v4l2_ctrl *jpeg_quality;
 
 	struct m5mols_version ver;
 	struct m5mols_capture cap;

drivers/media/video/m5mols/m5mols_controls.c

@@ -492,6 +492,10 @@ static int m5mols_s_ctrl(struct v4l2_ctrl *ctrl)
 	case V4L2_CID_IMAGE_STABILIZATION:
 		ret = m5mols_set_stabilization(info, ctrl->val);
 		break;
+
+	case V4L2_CID_JPEG_COMPRESSION_QUALITY:
+		ret = m5mols_write(sd, CAPP_JPEG_RATIO, ctrl->val);
+		break;
 	}
 
 	if (ret == 0 && info->mode != last_mode)
@@ -530,8 +534,7 @@ int m5mols_init_controls(struct v4l2_subdev *sd)
 		return ret;
 
 	zoom_step = is_manufacturer(info, REG_SAMSUNG_OPTICS) ? 31 : 1;
-
-	v4l2_ctrl_handler_init(&info->handle, 6);
+	v4l2_ctrl_handler_init(&info->handle, 20);
 
 	info->auto_wb = v4l2_ctrl_new_std_menu(&info->handle,
 			&m5mols_ctrl_ops, V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
@@ -579,6 +582,9 @@ int m5mols_init_controls(struct v4l2_subdev *sd)
 	info->stabilization = v4l2_ctrl_new_std(&info->handle, &m5mols_ctrl_ops,
 			V4L2_CID_IMAGE_STABILIZATION, 0, 1, 1, 0);
 
+	info->jpeg_quality = v4l2_ctrl_new_std(&info->handle, &m5mols_ctrl_ops,
+			V4L2_CID_JPEG_COMPRESSION_QUALITY, 1, 100, 1, 80);
+
 	if (info->handle.error) {
 		int ret = info->handle.error;
 		v4l2_err(sd, "Failed to initialize controls: %d\n", ret);

drivers/media/video/m5mols/m5mols_reg.h

@@ -310,6 +310,7 @@
 #define REG_JPEG		0x10
 
 #define CAPP_MAIN_IMAGE_SIZE	I2C_REG(CAT_CAPT_PARM, 0x01, 1)
+#define CAPP_JPEG_RATIO		I2C_REG(CAT_CAPT_PARM, 0x17, 1)
 
 #define CAPP_MCC_MODE		I2C_REG(CAT_CAPT_PARM, 0x1d, 1)
 #define REG_MCC_OFF		0x00