Hi...
I am using i.mx6q processor based hardware platform with kernel version linux-3.0.35-2666-gbdde708(i.
mx6qsabresd).
My requirement is to change the screen mode from landscape to portrait.
I have tried following options to change the screen mode, but nothings seems to be working.
1. echo 0 > /sys/class/graphics/fb0/rotate
No change in the screen mode.
2 echo 1 > /sys/class/graphics/fb0/rotate
Could able to see the inverted screen.
3. echo 2 > /sys/class/graphics/fb0/rotate
Actual screen no change.
4. echo N > /sys/class/graphics/fb0/rotate N 3,4,5,6,7
Screen blanks out.
In driver file i found following lines of code (drivers/video/mxc/mxc_ipuv3_fb.c)
static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
...
...
if (var->rotate > IPU_ROTATE_VERT_FLIP)
{
var->rotate = IPU_ROTATE_NONE;
}
...
..
}
The ipu_rotate_mode enumeration variable has following options which seems to be not used.
enum ipu_rotate_mode {
/* Note the enum values correspond to BAM value */
IPU_ROTATE_NONE = 0,
IPU_ROTATE_VERT_FLIP = 1,
IPU_ROTATE_HORIZ_FLIP = 2,
IPU_ROTATE_180 = 3,
IPU_ROTATE_90_RIGHT = 4,
IPU_ROTATE_90_RIGHT_VFLIP = 5,
IPU_ROTATE_90_RIGHT_HFLIP = 6,
IPU_ROTATE_90_LEFT = 7,
};
I even tried by commenting the "var->rotate = IPU_ROTATE_NONE;" loc in mxcfb_check_var() function, but for the options
IPU_ROTATE_90_RIGHT = 4,
IPU_ROTATE_90_RIGHT_VFLIP = 5,
IPU_ROTATE_90_RIGHT_HFLIP = 6,
IPU_ROTATE_90_LEFT = 7,
screen turns blank.
Any suggestion on how to tackle this issue?
Regards,
Somashekar
