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From e6e2b986f038f049fc02e224ad54e939318b909e Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 11 Jun 2020 18:34:16 +0100
Subject: [PATCH] media: i2c: imx290: Add H and V flip controls
The sensor supports horizontal and vertical flips, so support them
through V4L2_CID_HFLIP and V4L2_CID_VFLIP.
This sensor does NOT change the Bayer order when changing the
direction of readout, therefore no special handling is required for
that.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/media/i2c/imx290.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
--- a/drivers/media/i2c/imx290.c
+++ b/drivers/media/i2c/imx290.c
@@ -34,6 +34,7 @@ enum imx290_clk_index {
#define IMX290_STANDBY 0x3000
#define IMX290_REGHOLD 0x3001
#define IMX290_XMSTA 0x3002
+#define IMX290_FLIP_WINMODE 0x3007
#define IMX290_FR_FDG_SEL 0x3009
#define IMX290_BLKLEVEL_LOW 0x300a
#define IMX290_BLKLEVEL_HIGH 0x300b
@@ -107,6 +108,8 @@ struct imx290 {
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *hflip;
+ struct v4l2_ctrl *vflip;
struct v4l2_ctrl *exposure;
struct mutex lock;
@@ -600,6 +603,7 @@ static int imx290_set_ctrl(struct v4l2_c
struct imx290 *imx290 = container_of(ctrl->handler,
struct imx290, ctrls);
int ret = 0;
+ u8 val;
/* V4L2 controls values will be applied only when power is already up */
if (!pm_runtime_get_if_in_use(imx290->dev))
@@ -618,6 +622,16 @@ static int imx290_set_ctrl(struct v4l2_c
case V4L2_CID_VBLANK:
ret = imx290_set_vmax(imx290, ctrl->val);
break;
+ case V4L2_CID_HFLIP:
+ case V4L2_CID_VFLIP:
+ /* WINMODE is in bits [6:4], so need to read-modify-write */
+ ret = imx290_read_reg(imx290, IMX290_FLIP_WINMODE, &val);
+ if (ret)
+ break;
+ val &= ~0x03;
+ val |= imx290->vflip->val | (imx290->hflip->val << 1);
+ ret = imx290_write_reg(imx290, IMX290_FLIP_WINMODE, val);
+ break;
case V4L2_CID_TEST_PATTERN:
if (ctrl->val) {
imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW, 0x00);
@@ -922,6 +936,9 @@ static int imx290_set_stream(struct v4l2
imx290_stop_streaming(imx290);
pm_runtime_put(imx290->dev);
}
+ /* vflip and hflip cannot change during streaming */
+ __v4l2_ctrl_grab(imx290->vflip, enable);
+ __v4l2_ctrl_grab(imx290->hflip, enable);
unlock_and_return:
@@ -1213,6 +1230,11 @@ static int imx290_probe(struct i2c_clien
IMX290_EXPOSURE_STEP,
mode->vmax - 4);
+ imx290->hflip = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ imx290->vflip = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+
imx290->link_freq =
v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_LINK_FREQ,
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