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Commit e95c17e9 authored by Timur Tabi's avatar Timur Tabi
Browse files

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: default avatarTimur Tabi <timur@freescale.com>
parent 28671735

drivers/video/fsl-diu-fb.c

+17 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/fsl-diu-fb.h

+9 −0
Original line number Diff line number Diff line
@@ -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