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video: tegra: add IOCTL for querying modes

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Change-Id: Ic312271b96a8bb8d8b2696448d3ff7fd73a7a851
Signed-off-by: Erik Gilling <konkers@android.com>
This commit is contained in:
Erik Gilling
2010-10-26 14:25:48 -07:00
parent 72c7a306e9
commit 185ddab215
2 changed files with 33 additions and 0 deletions
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26
drivers/video/tegra/fb.c
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@@ -499,6 +499,9 @@ static int tegra_fb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long
{
struct tegra_fb_info *tegra_fb = info->par;
struct tegra_fb_flip_args flip_args;
struct tegra_fb_modedb modedb;
struct fb_modelist *modelist;
int i;
int fd;
int ret;
@@ -520,6 +523,29 @@ static int tegra_fb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long
return ret;
case FBIO_TEGRA_GET_MODEDB:
if (copy_from_user(&modedb, (void __user *)arg, sizeof(modedb)))
return -EFAULT;
i = 0;
list_for_each_entry(modelist, &info->modelist, list) {
struct fb_var_screeninfo var;
if (i >= modedb.modedb_len)
break;
fb_videomode_to_var(&var, &modelist->mode);
if (copy_to_user((void __user *)&modedb.modedb[i],
&var, sizeof(var)))
return -EFAULT;
i++;
}
modedb.modedb_len = i;
if (copy_to_user((void __user *)arg, &modedb, sizeof(modedb)))
return -EFAULT;
break;
default:
return -ENOTTY;
}

7
include/video/tegrafb.h
View File

@@ -18,6 +18,7 @@
#ifndef _LINUX_TEGRAFB_H_
#define _LINUX_TEGRAFB_H_
#include <linux/fb.h>
#include <linux/types.h>
#include <asm/ioctl.h>
@@ -77,7 +78,13 @@ struct tegra_fb_flip_args {
__u32 post_syncpt_val;
};
struct tegra_fb_modedb {
struct fb_var_screeninfo *modedb;
__u32 modedb_len;
};
#define FBIO_TEGRA_SET_NVMAP_FD _IOW('F', 0x40, __u32)
#define FBIO_TEGRA_FLIP _IOW('F', 0x41, struct tegra_fb_flip_args)
#define FBIO_TEGRA_GET_MODEDB _IOWR('F', 0x42, struct tegra_fb_modedb)
#endif