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drivers/video: fsl-diu-fb: add support for set_gamma ioctls 

The MPC5121 BSP comes with a gamma_set utility that initializes the gamma
table via an ioctl.  Unfortunately, the ioctl number that utility uses
is defined improperly, but we can still support it.

Signed-off-by: Timur Tabi <timur@freescale.com>
This commit is contained in:
Timur Tabi 2012-10-16 17:33:44 -05:00
parent 2867173572
commit e95c17e9ca
2 changed files with 26 additions and 0 deletions
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17
drivers/video/fsl-diu-fb.c
View File

@ -1181,6 +1181,23 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
ad->ckmin_b = ck.blue_min;
}
break;
#ifdef CONFIG_PPC_MPC512x
case MFB_SET_GAMMA: {
struct fsl_diu_data *data = mfbi->parent;
if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
return -EFAULT;
setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
break;
}
case MFB_GET_GAMMA: {
struct fsl_diu_data *data = mfbi->parent;
if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
return -EFAULT;
break;
}
#endif
default:
dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
return -ENOIOCTLCMD;

9
include/linux/fsl-diu-fb.h
View File

@ -46,6 +46,15 @@ struct aoi_display_offset {
#define MFB_SET_PIXFMT _IOW('M', 8, __u32)
#define MFB_GET_PIXFMT _IOR('M', 8, __u32)
/*
* The MPC5121 BSP comes with a gamma_set utility that initializes the
* gamma table. Unfortunately, it uses bad values for the IOCTL commands,
* but there's nothing we can do about it now. These ioctls are only
* supported on the MPC5121.
*/
#define MFB_SET_GAMMA _IOW('M', 1, __u8)
#define MFB_GET_GAMMA _IOR('M', 1, __u8)
/*
* The original definitions of MFB_SET_PIXFMT and MFB_GET_PIXFMT used the
* wrong value for 'size' field of the ioctl. The current macros above use the