Need to change the screen to portrait mode

somashekarj — Thu, 08 May 2014 05:01:55 GMT

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

Re: Need to change the screen to portrait mode

jamesbone — Tue, 13 May 2014 17:39:07 GMT

PLease take a look to the following thread:

Re: i.mx6 rotate screen 180

Have a great day,
Jaime

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Re: Need to change the screen to portrait mode

somashekarj — Mon, 30 Jun 2014 07:40:16 GMT

Thank you Jaime.. :smileyhappy:

topic Re: Need to change the screen to portrait mode in i.MX Processors

Need to change the screen to portrait mode

Re: Need to change the screen to portrait mode

Re: Need to change the screen to portrait mode