From: Krzysztof Kozlowski <krzk@kernel.org>
To: Sakari Ailus <sakari.ailus@linux.intel.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Subject: [PATCH 1/2] media: i2c: imx258: add HDR control
Date: Mon, 5 Oct 2020 17:15:58 +0200 [thread overview]
Message-ID: <20201005151559.12003-1-krzk@kernel.org> (raw)
The IMX258 supports High Dynamic Range with 5 levels of low/high
exposure ratio. Add a V4L2 control for HDR (WIDE_DYNAMIC_RANGE).
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
drivers/media/i2c/imx258.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index 7bedbfe5c4d6..aedf8e7c6165 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -61,6 +61,15 @@
#define IMX258_DGTL_GAIN_DEFAULT 1024
#define IMX258_DGTL_GAIN_STEP 1
+/* HDR control */
+#define IMX258_REG_HDR 0x0220
+#define IMX258_HDR_ON BIT(0)
+#define IMX258_REG_HDR_RATIO 0x0222
+#define IMX258_HDR_RATIO_MIN 0
+#define IMX258_HDR_RATIO_MAX 5
+#define IMX258_HDR_RATIO_STEP 1
+#define IMX258_HDR_RATIO_DEFAULT 0x0
+
/* Test Pattern Control */
#define IMX258_REG_TEST_PATTERN 0x0600
@@ -777,6 +786,22 @@ static int imx258_set_ctrl(struct v4l2_ctrl *ctrl)
!ctrl->val ? REG_CONFIG_MIRROR_FLIP :
REG_CONFIG_FLIP_TEST_PATTERN);
break;
+ case V4L2_CID_WIDE_DYNAMIC_RANGE:
+ if (!ctrl->val) {
+ ret = imx258_write_reg(imx258, IMX258_REG_HDR,
+ IMX258_REG_VALUE_08BIT,
+ IMX258_HDR_RATIO_MIN);
+ } else {
+ ret = imx258_write_reg(imx258, IMX258_REG_HDR,
+ IMX258_REG_VALUE_08BIT,
+ IMX258_HDR_ON);
+ if (ret)
+ break;
+ ret = imx258_write_reg(imx258, IMX258_REG_HDR_RATIO,
+ IMX258_REG_VALUE_08BIT,
+ BIT(IMX258_HDR_RATIO_MAX));
+ }
+ break;
default:
dev_info(&client->dev,
"ctrl(id:0x%x,val:0x%x) is not handled\n",
@@ -1193,6 +1218,9 @@ static int imx258_init_controls(struct imx258 *imx258)
IMX258_DGTL_GAIN_STEP,
IMX258_DGTL_GAIN_DEFAULT);
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx258_ctrl_ops, V4L2_CID_WIDE_DYNAMIC_RANGE,
+ 0, 1, 1, IMX258_HDR_RATIO_DEFAULT);
+
v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx258_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(imx258_test_pattern_menu) - 1,
--
2.17.1
next reply other threads:[~2020-10-05 15:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-05 15:15 Krzysztof Kozlowski [this message]
2020-10-05 15:15 ` [PATCH 2/2] media: i2c: imx258: validate rotation only if it is provided Krzysztof Kozlowski
2020-10-28 9:23 ` Krzysztof Kozlowski
2020-10-30 11:32 ` Krzysztof Kozlowski
2020-10-28 8:38 ` [PATCH 1/2] media: i2c: imx258: add HDR control Krzysztof Kozlowski
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