Hi Harald, Did you get it work? I also got the same issue. Can you share your experience?
Thanks, Jimmy Harald Funk於 2014年11月5日星期三 UTC+8上午3時09分45秒寫道： > Hello together, > > I am new to Beaglebone Black (and embedded linux). > > I am trying to get an external LCD with 18bit or 24bit Interface to work > on the Beaglebone Black. The LCD I am using is a Kyocera > T-55343GD035JU-LW-ADN with 320x240 pixel and 24 bit colordepth. ( > http://www.kyocera-display.com/products/partdetail.asp?PartNumber=T-55343GD035JU-LW-ADN) > > > > I wrote my own Devicetree-Overlay based on cape-bone-lcd3-00A0.dts at > /lib/firmware without the Touchscreen and Keys, but have added the > additional pins for lcd_data 16 to 23 and changed the bpp in the panel info > to 24. The LCD itself works and it boot to the GUI on Angström or Debian, > but i only get lcd_data 0 -15 to work. > When I add "video=LVDS-1:320x240-24@60" to the uEnv.txt file like it is > written here: http://elinux.org/24bit_LCD_for_BBB, I get many errors in > dmesg starting with "[ 4.185659] WARNING: at > drivers/gpu/drm/tilcdc/tilcdc_crtc.c:245 tilcdc_crtc_mode_set+0x2f/0x460()" > So this doesnt work. > > Changing the DefaultDepth at X11 config file changes the color-order from > RGB to BGR (how it should be at 24bit) at least with the Angstrom OS. At > Debian the Xserver doesnt start any more with this option. At Angstrom the > color-order is fine but the bits 16 to 23 doesnt work at all (No Data on > this lines). > > I also tried to change the depth of the framebuffer with fbset -depth 24 > but get only the error : "fbset: FBIOPUT_VSCREENINFO: Invalid argument" > > When I read the documentation of the fbdev driver at the ti website, there > is written that the beaglebone should work at 24 (or 32 bit) without any > Probems. (Here > http://processors.wiki.ti.com/index.php/AM335x_LCD_Controller_Driver%27s_Guide > > and here > http://processors.wiki.ti.com/index.php/Linux_Core_LCD_Controller_User_Guide#AM335x_LCDC_Display_Driver_.28DRM.29 > ) > > What am I doing wrong? Can anyone please try to help me find my errors? > > Thanks for your help > > Harald > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
