This patch fixes the issue that appears when mt9v024 camera is used with the mt9v022 soc camera driver. The minimum total row time is 690 columns (horizontal width + horizontal blanking). The minimum horizontal blanking is 61. Thus, when the window width is set below 627, horizontal blanking must be increased. For the mt9v024 camera the values above are correct and for the mt9v022 camera the correct values are in the existing kernel driver.
Signed-off-by: Andrei Andreyanau <[email protected]> --- linux/drivers/media/i2c/soc_camera/mt9v022.c.orig 2013-02-06 15:43:35.522079869 +0300 +++ linux/drivers/media/i2c/soc_camera/mt9v022.c 2013-02-06 14:53:44.000000000 +0300 @@ -275,6 +275,7 @@ static int mt9v022_s_crop(struct v4l2_su struct i2c_client *client = v4l2_get_subdevdata(sd); struct mt9v022 *mt9v022 = to_mt9v022(client); struct v4l2_rect rect = a->c; + int min_row, min_blank; int ret; /* Bayer format - even size lengths */ @@ -310,13 +311,21 @@ static int mt9v022_s_crop(struct v4l2_su ret = reg_write(client, MT9V022_COLUMN_START, rect.left); if (!ret) ret = reg_write(client, MT9V022_ROW_START, rect.top); + /* + * mt9v022: min total row time is 660 columns, min blanking is 43 + * mt9v024: min total row time is 690 columns, min blanking is 61 + */ + if (is_mt9v024(mt9v022->chip_version)) { + min_row = 690; + min_blank = 61; + } else { + min_row = 660; + min_blank = 43; + } if (!ret) - /* - * Default 94, Phytec driver says: - * "width + horizontal blank >= 660" - */ ret = v4l2_ctrl_s_ctrl(mt9v022->hblank, - rect.width > 660 - 43 ? 43 : 660 - rect.width); + rect.width > min_row - min_blank ? + min_blank : min_row - rect.width); if (!ret) ret = v4l2_ctrl_s_ctrl(mt9v022->vblank, 45); if (!ret) -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
