From ee4ce89366935da1c044d0417bf09f9f0e4a3457 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 16 Jan 2023 15:44:44 +0100 Subject: [PATCH] media: i2c: imx290: Factor out black level setting to a function The black level programmed in the BLKLEVEL register depends on the output format. The black level value computation is currently performed in imx290_set_ctrl(), in addition to having different black level values in the output-specific register value tables. Move it to a separate function to simplify the imx290_set_ctrl() code. Signed-off-by: Laurent Pinchart Reviewed-by: Alexander Stein Reviewed-by: Dave Stevenson Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/imx290.c | 50 ++++++++++++++++++++++++---------------------- 1 file changed, 26 insertions(+), 24 deletions(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index d3279d8..e7043e9 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -152,6 +152,9 @@ #define IMX290_PIXEL_ARRAY_RECORDING_WIDTH 1920 #define IMX290_PIXEL_ARRAY_RECORDING_HEIGHT 1080 +/* Equivalent value for 16bpp */ +#define IMX290_BLACK_LEVEL_DEFAULT 3840 + #define IMX290_NUM_SUPPLIES 3 struct imx290_regval { @@ -315,7 +318,6 @@ static const struct imx290_regval imx290_10bit_settings[] = { { IMX290_ADBIT2, IMX290_ADBIT2_10BIT }, { IMX290_ADBIT3, IMX290_ADBIT3_10BIT }, { IMX290_CSI_DT_FMT, IMX290_CSI_DT_FMT_RAW10 }, - { IMX290_BLKLEVEL, 60 }, }; static const struct imx290_regval imx290_12bit_settings[] = { @@ -325,7 +327,6 @@ static const struct imx290_regval imx290_12bit_settings[] = { { IMX290_ADBIT2, IMX290_ADBIT2_12BIT }, { IMX290_ADBIT3, IMX290_ADBIT3_12BIT }, { IMX290_CSI_DT_FMT, IMX290_CSI_DT_FMT_RAW12 }, - { IMX290_BLKLEVEL, 240 }, }; /* supported link frequencies */ @@ -516,35 +517,40 @@ static int imx290_set_data_lanes(struct imx290 *imx290) return ret; } +static int imx290_set_black_level(struct imx290 *imx290, + unsigned int black_level, int *err) +{ + return imx290_write(imx290, IMX290_BLKLEVEL, + black_level >> (16 - imx290->bpp), err); +} + static int imx290_write_current_format(struct imx290 *imx290) { + const struct imx290_regval *regs; + unsigned int num_regs; int ret; switch (imx290->current_format.code) { case MEDIA_BUS_FMT_SRGGB10_1X10: - ret = imx290_set_register_array(imx290, imx290_10bit_settings, - ARRAY_SIZE( - imx290_10bit_settings)); - if (ret < 0) { - dev_err(imx290->dev, "Could not set format registers\n"); - return ret; - } + regs = imx290_10bit_settings; + num_regs = ARRAY_SIZE(imx290_10bit_settings); break; case MEDIA_BUS_FMT_SRGGB12_1X12: - ret = imx290_set_register_array(imx290, imx290_12bit_settings, - ARRAY_SIZE( - imx290_12bit_settings)); - if (ret < 0) { - dev_err(imx290->dev, "Could not set format registers\n"); - return ret; - } + regs = imx290_12bit_settings; + num_regs = ARRAY_SIZE(imx290_12bit_settings); break; default: dev_err(imx290->dev, "Unknown pixel format\n"); return -EINVAL; } - return 0; + ret = imx290_set_register_array(imx290, regs, num_regs); + if (ret < 0) { + dev_err(imx290->dev, "Could not set format registers\n"); + return ret; + } + + return imx290_set_black_level(imx290, IMX290_BLACK_LEVEL_DEFAULT, &ret); } /* ---------------------------------------------------------------------------- @@ -573,7 +579,7 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl) case V4L2_CID_TEST_PATTERN: if (ctrl->val) { - imx290_write(imx290, IMX290_BLKLEVEL, 0, &ret); + imx290_set_black_level(imx290, 0, &ret); usleep_range(10000, 11000); imx290_write(imx290, IMX290_PGCTRL, (u8)(IMX290_PGCTRL_REGEN | @@ -582,12 +588,8 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl) } else { imx290_write(imx290, IMX290_PGCTRL, 0x00, &ret); usleep_range(10000, 11000); - if (imx290->bpp == 10) - imx290_write(imx290, IMX290_BLKLEVEL, 0x3c, - &ret); - else /* 12 bits per pixel */ - imx290_write(imx290, IMX290_BLKLEVEL, 0xf0, - &ret); + imx290_set_black_level(imx290, IMX290_BLACK_LEVEL_DEFAULT, + &ret); } break; default: -- 2.7.4