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@xxxxxxxxxxxxx>
---
drivers/video/fsl-diu-fb.c | 17 +++++++++++++++++
include/linux/fsl-diu-fb.h | 9 +++++++++
2 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index 5b12e17..9c40547 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -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;
diff --git a/include/linux/fsl-diu-fb.h b/include/linux/fsl-diu-fb.h
index 11c16a1..a1e8277 100644
--- a/include/linux/fsl-diu-fb.h
+++ b/include/linux/fsl-diu-fb.h
@@ -47,6 +47,15 @@ struct aoi_display_offset {
#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
* right size, but we still need to provide backwards compatibility, at least
--
1.7.3.4
--
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