Hi Gianluca, On Thu, Feb 09, 2017 at 03:37:41PM +0100, gianluca wrote: > Hello, > I would like to know if there is a clear way on using the lvds pins to drive > a LVDS display in a custom made board, based on iMX6Q (in the near future > the iMX6Dual). > > Actually it boots using Barebox 2017.01 and if there is a HDMI display it > uses without hassle. > > My init scripts are loading a splash screen, then boot into linux: > > > echo "Load splash.png from filesystem..." > > splash -f /dev/fb0 -b 0 $bootconfig_path/splash.png > > fb0.enable=1 > > But now, we are looking for a clear way to activate the LVDS signals in the > LCD Controller when an eeprom chip is found in the I2C bus (more or less > like EDID stuff) during bootup. > > In my bootup script (or specific board initcall code [board.c]) if no EEPROM > is found, then it will boot naturally with the HDMI port LCD Display (if > any) or completely BLIND board if no lcd is present. > > If it easy to activate the i2c bus and check for some chip addresses, I do > not know on how to activate the lvds within code. I think what you are looking for is of_device_enable_and_register() or of_device_enable_and_register_by_name(). You can call it on either the lvds device node or the hdmi device node, depending on whether you found an EEPROM or not. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
