From 96c75399544838e1752001c8abdde36dd459cf8f Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Tue, 25 Aug 2009 11:53:23 -0300 Subject: V4L/DVB (12536): soc-camera: remove .gain and .exposure struct soc_camera_device members This makes the soc-camera interface for V4L2 subdevices thinner yet. Handle gain and exposure internally in each driver just like all other controls. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/mt9m001.c | 43 ++++++++++++++++++++++++++++--------------- 1 file changed, 28 insertions(+), 15 deletions(-) (limited to 'drivers/media/video/mt9m001.c') diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c index 4b39479..45388d2 100644 --- a/drivers/media/video/mt9m001.c +++ b/drivers/media/video/mt9m001.c @@ -80,6 +80,8 @@ struct mt9m001 { struct v4l2_rect rect; /* Sensor window */ __u32 fourcc; int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ + unsigned int gain; + unsigned int exposure; unsigned char autoexposure; }; @@ -129,8 +131,8 @@ static int mt9m001_init(struct i2c_client *client) dev_dbg(&client->dev, "%s\n", __func__); /* - * We don't know, whether platform provides reset, - * issue a soft reset too + * We don't know, whether platform provides reset, issue a soft reset + * too. This returns all registers to their default values. */ ret = reg_write(client, MT9M001_RESET, 1); if (!ret) @@ -200,6 +202,7 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) struct soc_camera_device *icd = client->dev.platform_data; int ret; const u16 hblank = 9, vblank = 25; + unsigned int total_h; if (mt9m001->fourcc == V4L2_PIX_FMT_SBGGR8 || mt9m001->fourcc == V4L2_PIX_FMT_SBGGR16) @@ -219,6 +222,8 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) soc_camera_limit_side(&rect.top, &rect.height, MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); + total_h = rect.height + icd->y_skip_top + vblank; + /* Blanking and start values - default... */ ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); if (!ret) @@ -236,15 +241,13 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) ret = reg_write(client, MT9M001_WINDOW_HEIGHT, rect.height + icd->y_skip_top - 1); if (!ret && mt9m001->autoexposure) { - ret = reg_write(client, MT9M001_SHUTTER_WIDTH, - rect.height + icd->y_skip_top + vblank); + ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h); if (!ret) { const struct v4l2_queryctrl *qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); - icd->exposure = (524 + (rect.height + icd->y_skip_top + - vblank - 1) * - (qctrl->maximum - qctrl->minimum)) / + mt9m001->exposure = (524 + (total_h - 1) * + (qctrl->maximum - qctrl->minimum)) / 1048 + qctrl->minimum; } } @@ -457,6 +460,12 @@ static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) case V4L2_CID_EXPOSURE_AUTO: ctrl->value = mt9m001->autoexposure; break; + case V4L2_CID_GAIN: + ctrl->value = mt9m001->gain; + break; + case V4L2_CID_EXPOSURE: + ctrl->value = mt9m001->exposure; + break; } return 0; } @@ -518,7 +527,7 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) } /* Success */ - icd->gain = ctrl->value; + mt9m001->gain = ctrl->value; break; case V4L2_CID_EXPOSURE: /* mt9m001 has maximum == default */ @@ -535,21 +544,21 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) shutter); if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) return -EIO; - icd->exposure = ctrl->value; + mt9m001->exposure = ctrl->value; mt9m001->autoexposure = 0; } break; case V4L2_CID_EXPOSURE_AUTO: if (ctrl->value) { const u16 vblank = 25; + unsigned int total_h = mt9m001->rect.height + + icd->y_skip_top + vblank; if (reg_write(client, MT9M001_SHUTTER_WIDTH, - mt9m001->rect.height + - icd->y_skip_top + vblank) < 0) + total_h) < 0) return -EIO; qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); - icd->exposure = (524 + (mt9m001->rect.height + - icd->y_skip_top + vblank - 1) * - (qctrl->maximum - qctrl->minimum)) / + mt9m001->exposure = (524 + (total_h - 1) * + (qctrl->maximum - qctrl->minimum)) / 1048 + qctrl->minimum; mt9m001->autoexposure = 1; } else @@ -629,6 +638,10 @@ static int mt9m001_video_probe(struct soc_camera_device *icd, if (ret < 0) dev_err(&client->dev, "Failed to initialise the camera\n"); + /* mt9m001_init() has reset the chip, returning registers to defaults */ + mt9m001->gain = 64; + mt9m001->exposure = 255; + return ret; } @@ -701,7 +714,7 @@ static int mt9m001_probe(struct i2c_client *client, /* Second stage probe - when a capture adapter is there */ icd->ops = &mt9m001_ops; - icd->y_skip_top = 1; + icd->y_skip_top = 0; mt9m001->rect.left = MT9M001_COLUMN_SKIP; mt9m001->rect.top = MT9M001_ROW_SKIP; -- cgit v1.1