Hi all! The LCD-screen can't recover the picture from omap3isp after a blank/unblank of the framebuffer. I have seen the problem (?) since kernel 3.5, and want now try to clarify if probably just I am the problem, or if there is really an issue with the omapdss-driver (or the combination omapdss/omap3isp/omapfb). For the tests I am using the following: - Kernel 3.7 from tmlind: http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap.git - Beagleboard-xm with Leopard Imaging LI-5M03 (mt9p031) - omap3-isp-live streamer app from Laurent Pinchart: http://git.ideasonboard.org/omap3-isp-live.git - own written LCD-driver based on panel-generic-dpi for the hx8369 controller and a Truly 480x800 LCD I am running the streamer which gives me a stream from the mt9p031 with about 25fps. Then I let the console blank, and the panel suspends (while still running the streamer app). If I try to resume the display (unblank the screen), the overlay gfx and vid2 disable. To reproduce: root@beagleboard:/voisee# fb0=/sys/class/graphics/fb0 root@beagleboard:/voisee# setterm -blank 1 root@beagleboard:/voisee# ./streamer & Wait until the LCD blanks after a minute (goes black). Now unblank the screen (resume the display): root@beagleboard:/voisee# echo 0 > $fb0/blank Will result in the following and the following (screen flickers and goes black again): [ 5293.617095] omapdss DISPC error: FIFO UNDERFLOW on gfx, disabling the overlay [ 5293.678283] omapdss DISPC error: FIFO UNDERFLOW on vid2, disabling the overlay Output of mediactl -p while streaming: http://pastebin.com/d9zDfKXu OMAPDSS-config: http://pastebin.com/JjF0CcCS Now my questions: Is this behaviour expected? Should I suspend/disable the ISP from my application whenever the screen "wants" to blank? If so, do I get some sort of event when the screen blanks (the blanking event from the framebuffer seems to be private). I have a long running viewfinder-app: Should I disable the blanking at all (setterm -blank 0)? Thank you very much for your help/suggestions! Regards, Florian -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
