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| author | Krzysztof Kozlowski <krzk@kernel.org> | 2020-10-05 17:15:58 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-04-06 14:39:25 +0200 |
| commit | c6f9d67e2ac625e331f6a7f5715d2f809ff0a922 (patch) | |
| tree | 5486dd4a5546c6db65c7d74c2b659b7ebb0108c0 /drivers/media/i2c/imx258.c | |
| parent | dd90caa0111e178b52b21e56364bc2244a3973b3 (diff) | |
| download | lwn-c6f9d67e2ac625e331f6a7f5715d2f809ff0a922.tar.gz lwn-c6f9d67e2ac625e331f6a7f5715d2f809ff0a922.zip | |
media: i2c: imx258: add HDR control
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>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/i2c/imx258.c')
| -rw-r--r-- | drivers/media/i2c/imx258.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c index 61b2d87a9761..a017ec4e0f50 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, |