linux-kernel - [PATCH 2/2] media: ov02c10: Support hflip and vflip

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Message-Id: <20250820-ov02c10-fix-v1-2-3fcca2cfbfbf@kernel.org>
Date: Wed, 20 Aug 2025 02:13:20 +0200
From: Sebastian Reichel <sre@...nel.org>
To: Hans de Goede <hansg@...nel.org>, Bryan O'Donoghue <bod@...nel.org>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Heimir Thor Sverrisson <heimir.sverrisson@...il.com>, 
 Hans Verkuil <hverkuil@...nel.org>
Cc: Frederic Stuyk <fstuyk@...box.com>, linux-media@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Sebastian Reichel <sre@...nel.org>
Subject: [PATCH 2/2] media: ov02c10: Support hflip and vflip

Support horizontal and vertical flip, which is necessary to handle
upside-down mounted sensors.

Suggested-by: Bryan O'Donoghue <bod@...nel.org>
Signed-off-by: Sebastian Reichel <sre@...nel.org>
---
 drivers/media/i2c/ov02c10.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ov02c10.c b/drivers/media/i2c/ov02c10.c
index 3a02fce0a9bc0ca3ab87defe3eefd04efb4012e7..103d007415348a8bd31a09e518de23f5fd77c618 100644
--- a/drivers/media/i2c/ov02c10.c
+++ b/drivers/media/i2c/ov02c10.c
@@ -384,6 +384,8 @@ struct ov02c10 {
 	struct v4l2_ctrl *vblank;
 	struct v4l2_ctrl *hblank;
 	struct v4l2_ctrl *exposure;
+	struct v4l2_ctrl *hflip;
+	struct v4l2_ctrl *vflip;
 
 	struct clk *img_clk;
 	struct gpio_desc *reset;
@@ -462,6 +464,16 @@ static int ov02c10_set_ctrl(struct v4l2_ctrl *ctrl)
 		ret = ov02c10_test_pattern(ov02c10, ctrl->val);
 		break;
 
+	case V4L2_CID_HFLIP:
+		cci_update_bits(ov02c10->regmap, OV02C10_ROTATE_CONTROL,
+				BIT(3), ov02c10->hflip->val << 3, &ret);
+		break;
+
+	case V4L2_CID_VFLIP:
+		cci_update_bits(ov02c10->regmap, OV02C10_ROTATE_CONTROL,
+				BIT(4), ov02c10->vflip->val << 4, &ret);
+		break;
+
 	default:
 		ret = -EINVAL;
 		break;
@@ -486,7 +498,7 @@ static int ov02c10_init_controls(struct ov02c10 *ov02c10)
 	s64 exposure_max, h_blank, pixel_rate;
 	int ret;
 
-	v4l2_ctrl_handler_init(ctrl_hdlr, 10);
+	v4l2_ctrl_handler_init(ctrl_hdlr, 12);
 
 	ov02c10->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
 						    &ov02c10_ctrl_ops,
@@ -537,6 +549,17 @@ static int ov02c10_init_controls(struct ov02c10 *ov02c10)
 					      exposure_max,
 					      OV02C10_EXPOSURE_STEP,
 					      exposure_max);
+
+	ov02c10->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov02c10_ctrl_ops,
+					   V4L2_CID_HFLIP, 0, 1, 1, 0);
+	if (ov02c10->hflip)
+		ov02c10->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+
+	ov02c10->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov02c10_ctrl_ops,
+					   V4L2_CID_VFLIP, 0, 1, 1, 0);
+	if (ov02c10->vflip)
+		ov02c10->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+
 	v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov02c10_ctrl_ops,
 				     V4L2_CID_TEST_PATTERN,
 				     ARRAY_SIZE(ov02c10_test_pattern_menu) - 1,

-- 
2.50.1