media: i2c: ov9281: add enum_frame_interval function for iq tool 2.2 and hal3

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

Adds the ov9281 parts of the Rockchip patch adding enum_frame_interval to
a large number of drivers.

Change-Id: I03344cd6cf278dd7c18fce8e97479089ef185a5c
Signed-off-by: NZefa Chen <zefa.chen@rock-chips.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/media/i2c/ov9281.c

@@ -4,6 +4,7 @@
  *
  * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
  * V0.0X01.0X02 fix mclk issue when probe multiple camera.
+ * V0.0X01.0X03 add enum_frame_interval function.
  */
 
 #include <linux/clk.h>
@@ -23,7 +24,7 @@
 #include <media/v4l2-subdev.h>
 #include <linux/pinctrl/consumer.h>
 
-#define DRIVER_VERSION			KERNEL_VERSION(0, 0x01, 0x2)
+#define DRIVER_VERSION			KERNEL_VERSION(0, 0x01, 0x3)
 
 #ifndef V4L2_CID_DIGITAL_GAIN
 #define V4L2_CID_DIGITAL_GAIN		V4L2_CID_GAIN
@@ -92,7 +93,7 @@ struct regval {
 struct ov9281_mode {
 	u32 width;
 	u32 height;
-	u32 max_fps;
+	struct v4l2_fract max_fps;
 	u32 hts_def;
 	u32 vts_def;
 	u32 exp_def;
@@ -246,7 +247,10 @@ static const struct ov9281_mode supported_modes[] = {
 	{
 		.width = 1280,
 		.height = 800,
-		.max_fps = 120,
+		.max_fps = {
+			.numerator = 10000,
+			.denominator = 1200000,
+		},
 		.exp_def = 0x0320,
 		.hts_def = 0x0b60,//0x2d8*4
 		.vts_def = 0x038e,
@@ -483,8 +487,7 @@ static int OV9281_g_frame_interval(struct v4l2_subdev *sd,
 	const struct ov9281_mode *mode = ov9281->cur_mode;
 
 	mutex_lock(&ov9281->mutex);
-	fi->interval.numerator = 10000;
-	fi->interval.denominator = mode->max_fps * 10000;
+	fi->interval = mode->max_fps;
 	mutex_unlock(&ov9281->mutex);
 
 	return 0;
@@ -778,6 +781,23 @@ static int ov9281_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 }
 #endif
 
+static int
+ov9281_enum_frame_interval(struct v4l2_subdev *sd,
+			   struct v4l2_subdev_pad_config *cfg,
+			   struct v4l2_subdev_frame_interval_enum *fie)
+{
+	if (fie->index >= ARRAY_SIZE(supported_modes))
+		return -EINVAL;
+
+	if (fie->code != MEDIA_BUS_FMT_Y10_1X10)
+		return -EINVAL;
+
+	fie->width = supported_modes[fie->index].width;
+	fie->height = supported_modes[fie->index].height;
+	fie->interval = supported_modes[fie->index].max_fps;
+	return 0;
+}
+
 static const struct dev_pm_ops ov9281_pm_ops = {
 	SET_RUNTIME_PM_OPS(ov9281_runtime_suspend,
 			   ov9281_runtime_resume, NULL)
@@ -805,6 +825,7 @@ static const struct v4l2_subdev_video_ops ov9281_video_ops = {
 static const struct v4l2_subdev_pad_ops ov9281_pad_ops = {
 	.enum_mbus_code = ov9281_enum_mbus_code,
 	.enum_frame_size = ov9281_enum_frame_sizes,
+	.enum_frame_interval = ov9281_enum_frame_interval,
 	.get_fmt = ov9281_get_fmt,
 	.set_fmt = ov9281_set_fmt,
 };