On Friday 27 May 2011 03:40 PM, Mohamed Thalib H wrote:
Hi,
I am using a omap3530
<http://focus-webapps.ti.com/general/docs/sitesearch/searchdevice.tsp?partNumber=omap3530>
based board. I am trying to rotate the LCD
using*/sys/class/graphics/fb0/rotate*. The rotation works only for 0
degree and 270 degrees.
When trying to rotate for 90 or 180 degree it give error message
*detected fb_set_par error, error code: -22 *and does not rotate.
The log output is below.*
*
/ # cat /proc/cmdline
omapdss.def_disp=lcd30 console=ttyS2,115200n8 root=/dev/mmcblk0p2 rw
rootfstype=ext3
rootwait lpj=1949696 omapfb.rotate=1 omapfb.rotate_type=1
omap_vout.vid1_static_vrf
b_alloc=y omapfb.vrfb=y
/ # echo "0" > /sys/class/graphics/fb0/rotate
detected fb_set_par error, error code: -22
/ # echo "1" > /sys/class/graphics/fb0/rotate
/ # echo "2" > /sys/class/graphics/fb0/rotate
detected fb_set_par error, error code: -22
/ # echo "3" > /sys/class/graphics/fb0/rotate
/ # echo "1" > /sys/class/graphics/fb0/rotate
Can some one help me in solving this issue.
Regards,
HM Thalib
For you info I am using 2.6.34 kernel. LCD size is 240x480
While tracing though the source code I have found out that in file
*drivers/video/omap2/dss/overlay.c *function *dss_check_overlay() *it is
checking if *dw < info->pos_x + outw *which is *(240 < 0 + 400)*
that is if my overlay width is smaller than screen size, if so return
error.
Have any one faced the same scenario. If I am doing something wrong,
Please let me know the correct steps to rotate the screen.
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