On Wed, Nov 25, 2015 at 10:02 PM, Ran Shalit <ranshalit@xxxxxxxxx> wrote: > Hello, > > I am working on embedded project with LCD 240x320 (width is 240) > When I render image to framebuffer, I see for a split of a second and > than it disappear. > Is there any explanation for such behaviour ? > > I first suspected the timing parameters which I've configured. > But when I use test bar color from the cpu it is seen stable , and > clear on the screen. I guess it means that timing are OK ? > > Another project (different cpu, kernel) with the same lcd, and the > same (Expected) timing, gives the following: > mode "240x320-0" > # D: 0.000 MHz, H: 0.000 kHz, V: 0.000 Hz > geometry 240 320 240 320 16 > timings 0 0 0 0 0 0 0 > accel false > rgba 5/11,6/5,5/0,0/0 > endmode > > In that project there is no issue when rendering an image (the image > does not disapear). > > But In my cpu, kernel I see the following: > > > root@dm814x:/opt/dvr_rdk/ti814x# fbset -fb /dev/fb0 > > mode "240x320-782" > > # D: 148.500 MHz, H: 285.577 kHz, V: 782.403 Hz > > geometry 240 320 240 320 16 > > timings 6734 148 88 36 4 44 5 > > rgba 5/11,6/5,5/0,0/0 > > endmode > > Can any of the above differences explain this behaviour ? Hiw can I > fix it (I tried to use fbset with -t 0 0 0 ... but it did not help) > > The images on my board can be seen here: > https://drive.google.com/drive/folders/0B22GsWueReZTR1IxYzEteDNpUGc > > Regards, > Ran I am actually interested to ask if the image need to be written over and over into framebuffer or should it be written only once ? If only once - what reason can it be that the image dissapear after a split of a second ? Regards, Ran -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
