[RFC,V2,07/11] media: platform: Add Mediatek ISP P1 private control

[Jungo Lin <jungo.lin@mediatek.com>]

Reserved Mediatek ISP P1 private control number with 16.
Moreover, add two private controls for ISP P1 user space
usage.

1. V4L2_CID_PRIVATE_GET_BIN_INFO
- Provide the image output width & height in case
camera binning mode is enabled.

2. V4L2_CID_PRIVATE_RAW_PATH
- Export the path control of the main stream to user space.
One is pure raw and the other is processing raw.
The default image path is pure raw.

Signed-off-by: Jungo Lin <jungo.lin@mediatek.com>
---
 .../mtk-isp/isp_50/cam/mtk_cam-ctrl.c         | 133 ++++++++++++++++++
 .../mtk-isp/isp_50/cam/mtk_cam-ctrl.h         |  32 +++++
 include/uapi/linux/v4l2-controls.h            |   4 +
 3 files changed, 169 insertions(+)
 create mode 100644 drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.c
 create mode 100644 drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.h

diff --git a/drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.c b/drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.c
new file mode 100644
index 000000000000..520adbe367ed
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Ryan Yu <ryan.yu@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include "mtk_cam-dev.h"
+#include "mtk_cam-ctrl.h"
+#include "mtk_cam.h"
+
+static int handle_ctrl_get_bin_info(struct v4l2_ctrl *ctrl)
+{
+	struct mtk_cam_dev *cam_dev = ctrl->priv;
+	const unsigned int idx = MTK_CAM_P1_MAIN_STREAM_OUT;
+	struct v4l2_format *imgo_fmt = &cam_dev->mem2mem2_nodes[idx].vdev_fmt;
+	unsigned int width, height;
+
+	width = imgo_fmt->fmt.pix_mp.width;
+	height = imgo_fmt->fmt.pix_mp.height;
+
+	dev_dbg(&cam_dev->pdev->dev, "Get bin info w*h:%d*%d",
+		width, height);
+
+	ctrl->val = (width << 16) | height;
+
+	return 0;
+}
+
+static int handle_ctrl_get_raw_path(struct v4l2_ctrl *ctrl)
+{
+	struct mtk_cam_dev *cam_dev = ctrl->priv;
+	struct isp_p1_device *p1_dev = get_p1_device(&cam_dev->pdev->dev);
+
+	ctrl->val = p1_dev->isp_ctx.isp_raw_path;
+
+	dev_dbg(&cam_dev->pdev->dev, "Get raw path:%d", ctrl->val);
+
+	return 0;
+}
+
+static int handle_ctrl_set_raw_path(struct v4l2_ctrl *ctrl)
+{
+	struct mtk_cam_dev *cam_dev = ctrl->priv;
+	struct isp_p1_device *p1_dev = get_p1_device(&cam_dev->pdev->dev);
+
+	p1_dev->isp_ctx.isp_raw_path = ctrl->val;
+	dev_dbg(&cam_dev->pdev->dev, "Set raw path:%d", ctrl->val);
+	return 0;
+}
+
+static int mtk_cam_dev_g_ctrl(struct v4l2_ctrl *ctrl)
+{
+	switch (ctrl->id) {
+	case V4L2_CID_PRIVATE_GET_BIN_INFO:
+		handle_ctrl_get_bin_info(ctrl);
+		break;
+	case V4L2_CID_PRIVATE_RAW_PATH:
+		handle_ctrl_get_raw_path(ctrl);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int mtk_cam_dev_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	switch (ctrl->id) {
+	case V4L2_CID_PRIVATE_RAW_PATH:
+		return handle_ctrl_set_raw_path(ctrl);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct v4l2_ctrl_ops mtk_cam_dev_ctrl_ops = {
+	.g_volatile_ctrl = mtk_cam_dev_g_ctrl,
+	.s_ctrl = mtk_cam_dev_s_ctrl,
+};
+
+struct v4l2_ctrl_config mtk_cam_controls[] = {
+	{
+	.ops = &mtk_cam_dev_ctrl_ops,
+	.id = V4L2_CID_PRIVATE_GET_BIN_INFO,
+	.name = "MTK CAM GET BIN INFO",
+	.type = V4L2_CTRL_TYPE_INTEGER,
+	.min = (IMG_MIN_WIDTH << 16) | IMG_MIN_HEIGHT,
+	.max = (IMG_MAX_WIDTH << 16) | IMG_MAX_HEIGHT,
+	.step = 1,
+	.def = (IMG_MAX_WIDTH << 16) | IMG_MAX_HEIGHT,
+	.flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE,
+	},
+	{
+	.ops = &mtk_cam_dev_ctrl_ops,
+	.id = V4L2_CID_PRIVATE_RAW_PATH,
+	.name = "MTK CAM RAW PATH",
+	.type = V4L2_CTRL_TYPE_BOOLEAN,
+	.min = 0,
+	.max = 1,
+	.step = 1,
+	.def = 1,
+	},
+};
+
+int mtk_cam_ctrl_init(struct mtk_cam_dev *cam_dev,
+		      struct v4l2_ctrl_handler *hdl)
+{
+	unsigned int i;
+
+	/* Initialized HW controls, allow V4L2_CID_MTK_CAM_MAX ctrls */
+	v4l2_ctrl_handler_init(hdl, V4L2_CID_MTK_CAM_MAX);
+	if (hdl->error) {
+		v4l2_ctrl_handler_free(hdl);
+		return hdl->error;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(mtk_cam_controls); i++)
+		v4l2_ctrl_new_custom(hdl, &mtk_cam_controls[i], cam_dev);
+
+	dev_dbg(&cam_dev->pdev->dev, "%s done", __func__);
+	return 0;
+}
diff --git a/drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.h b/drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.h
new file mode 100644
index 000000000000..74a6538c81ac
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/isp_50/cam/mtk_cam-ctrl.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Ryan Yu <ryan.yu@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MTK_CAM_CTRL_H__
+#define __MTK_CAM_CTRL_H__
+
+#include <media/v4l2-ctrls.h>
+
+#define V4L2_CID_MTK_CAM_PRIVATE_CAM  V4L2_CID_USER_MTK_CAM_BASE
+#define V4L2_CID_PRIVATE_GET_BIN_INFO \
+	(V4L2_CID_MTK_CAM_PRIVATE_CAM + 1)
+#define V4L2_CID_PRIVATE_RAW_PATH \
+	(V4L2_CID_MTK_CAM_PRIVATE_CAM + 2)
+
+#define V4L2_CID_MTK_CAM_MAX	16
+
+int mtk_cam_ctrl_init(struct mtk_cam_dev *cam_dev,
+		      struct v4l2_ctrl_handler *hdl);
+
+#endif /* __MTK_CAM_CTRL_H__ */
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 06479f2fb3ae..cbe8f5f7782b 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -192,6 +192,10 @@ enum v4l2_colorfx {
  * We reserve 16 controls for this driver. */
 #define V4L2_CID_USER_IMX_BASE			(V4L2_CID_USER_BASE + 0x10b0)
 
+/* The base for the mediatek ISP Pass 1 driver controls */
+/* We reserve 16 controls for this driver. */
+#define V4L2_CID_USER_MTK_CAM_BASE		(V4L2_CID_USER_BASE + 0x10c0)
+
 /* MPEG-class control IDs */
 /* The MPEG controls are applicable to all codec controls
  * and the 'MPEG' part of the define is historical */
-- 
2.18.0


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