On Mon, 19 Jan 2009, Kuninori Morimoto wrote:
> o ov772x_camera_info :: flags supports default image flip.
> o V4L2_CID_VFLIP/HFLIP supports image flip on user side.
> Thank Magnus for advice.
>
> Signed-off-by: Kuninori Morimoto <[email protected]>
> ---
> drivers/media/video/ov772x.c | 97
> ++++++++++++++++++++++++++++++++++++++++--
> include/media/ov772x.h | 5 ++
> 2 files changed, 98 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c
> index 3341857..ca0cf3c 100644
> --- a/drivers/media/video/ov772x.c
> +++ b/drivers/media/video/ov772x.c
> @@ -218,9 +218,10 @@
>
> /* COM3 */
> #define SWAP_MASK 0x38
> +#define IMG_MASK 0xC0
>
> -#define VFIMG_ON_OFF 0x80 /* Vertical flip image ON/OFF selection */
> -#define HMIMG_ON_OFF 0x40 /* Horizontal mirror image ON/OFF selection */
> +#define VFLIP_IMG 0x80 /* Vertical flip image ON/OFF selection */
> +#define HFLIP_IMG 0x40 /* Horizontal mirror image ON/OFF selection */
> #define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
> #define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
> #define SWAP_ML 0x08 /* Swap output MSB/LSB */
Please, put SWAP_MASK and IMG_MASK below single bit defines and define
them as
#define SWAP_MASK (SWAP_RGB | SWAP_YUV | SWAP_ML)
#define IMG_MASK (VFLIP_IMG | HFLIP_IMG)
> @@ -540,6 +541,27 @@ static const struct ov772x_win_size ov772x_win_qvga = {
> .regs = ov772x_qvga_regs,
> };
>
> +static const struct v4l2_queryctrl ov772x_controls[] = {
> + {
> + .id = V4L2_CID_VFLIP,
> + .type = V4L2_CTRL_TYPE_BOOLEAN,
> + .name = "Flip Vertically",
> + .minimum = 0,
> + .maximum = 1,
> + .step = 1,
> + .default_value = 0,
> + },
> + {
> + .id = V4L2_CID_HFLIP,
> + .type = V4L2_CTRL_TYPE_BOOLEAN,
> + .name = "Flip Horizontally",
> + .minimum = 0,
> + .maximum = 1,
> + .step = 1,
> + .default_value = 0,
> + },
> +};
> +
>
> /*
> * general function
> @@ -650,6 +672,60 @@ static unsigned long ov772x_query_bus_param(struct
> soc_camera_device *icd)
> return soc_camera_apply_sensor_flags(icl, flags);
> }
>
> +static int ov772x_get_control(struct soc_camera_device *icd,
> + struct v4l2_control *ctrl)
> +{
> + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
> + s32 val;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_VFLIP:
> + val = i2c_smbus_read_byte_data(priv->client, COM3);
> + if (val < 0)
> + return val;
> + if (priv->info->flags & OV772X_FLAG_VFLIP)
> + val ^= VFLIP_IMG;
> + val &= VFLIP_IMG;
> + ctrl->value = !!val;
> + break;
> + case V4L2_CID_HFLIP:
> + val = i2c_smbus_read_byte_data(priv->client, COM3);
> + if (val < 0)
> + return val;
> + if (priv->info->flags & OV772X_FLAG_HFLIP)
> + val ^= HFLIP_IMG;
> + val &= HFLIP_IMG;
> + ctrl->value = !!val;
> + break;
> + }
> + return 0;
> +}
> +
> +static int ov772x_set_control(struct soc_camera_device *icd,
> + struct v4l2_control *ctrl)
> +{
> + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
> + int ret = 0;
> + u8 val;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_VFLIP:
> + val = (ctrl->value) ? VFLIP_IMG : 0x00;
Superfluous parenthesis
> + if (priv->info->flags & OV772X_FLAG_VFLIP)
> + val ^= VFLIP_IMG;
> + ret = ov772x_mask_set(priv->client, COM3, VFLIP_IMG, val);
> + break;
> + case V4L2_CID_HFLIP:
> + val = (ctrl->value) ? HFLIP_IMG : 0x00;
ditto
> + if (priv->info->flags & OV772X_FLAG_HFLIP)
> + val ^= HFLIP_IMG;
> + ret = ov772x_mask_set(priv->client, COM3, HFLIP_IMG, val);
> + break;
> + }
> +
> + return ret;
> +}
> +
> static int ov772x_get_chip_id(struct soc_camera_device *icd,
> struct v4l2_dbg_chip_ident *id)
> {
> @@ -720,7 +796,7 @@ static int ov772x_set_fmt(struct soc_camera_device *icd,
> {
> struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd);
> int ret = -EINVAL;
> - u8 val;
> + u8 val, mask;
> int i;
>
> /*
> @@ -768,8 +844,17 @@ static int ov772x_set_fmt(struct soc_camera_device *icd,
> * set COM3
> */
> val = priv->fmt->com3;
> + if (priv->info->flags & OV772X_FLAG_VFLIP)
> + val |= VFLIP_IMG;
> + if (priv->info->flags & OV772X_FLAG_HFLIP)
> + val |= HFLIP_IMG;
> +
> + mask = SWAP_MASK;
> + if (IMG_MASK & val)
> + mask |= IMG_MASK;
> +
> ret = ov772x_mask_set(priv->client,
> - COM3, SWAP_MASK, val);
> + COM3, mask, val);
Do I understand it right, that this throws away any flip control settings
performed before S_FMT? You probably want to set priv->fmt->com3 in your
set_control and XOR instead of an OR here as well. Or was this
intentional?
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
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