On Fri, 2011-05-27 at 20:00 +0530, Mohamed Thalib H wrote: > 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. The driver does not resize the framebuffer for you. You need to resize and redraw it. It's been a while since I used rotation, but something like this should work: - disable the overlay - resize the framebuffer - resize the overlay (could be done automatically in the previous step) - set rotation - enable overlay For testing purposes you may also want to try a square framebuffer (240x240), in which case you can rotate it freely as it always fits in the screen. Also, you're using quite an old kernel. I suggest using newer, if possible. Tomi -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
