Hi, On Sat, 2015-02-07 at 22:40 +0100, Hans de Goede wrote: > Hi, > > On 02/07/2015 05:07 PM, Craig Lanning wrote: > > On Sat, 2015-02-07 at 09:33 +0100, Hans de Goede wrote: > >> Hi, > >> > >> On 02/07/2015 12:32 AM, Craig Lanning wrote: > >>> Does Rawhide have any code to deal with the LDC panel for Olimex boards > >>> (Allwinner A10s CPU)? > >>> > >>> I thought I saw somewhere that it has some early support for the LCD > >>> panel. > >>> > >>> I downloaded the Xfce rawhide image (in hopes that it would use the > >>> LCD), wrote it to an SD card, installed the uboot image, and booted it. > >>> > >>> It started running through its boot messages on the console. Asked me > >>> the Setup questions. Finally it continued to a login prompt on the > >>> console. I logged in and can use the console. I looked through the > >>> output from "dmesg" but didn't see anything about the LCD. > >>> > >>> I have a 7 inch LCD (800x480) and an HDMI port that I could hook to an > >>> HD monitor (1920x1080). I am glad that even though I used a "graphical" > >>> image, when it didn't find a display device, it used the console. > >>> > >>> Was I mistaken about it doing anything with the LCD panel, or is there > >>> some additional configuration that I need to do for it to work? > >>> > >>> If it doesn't support the LCD, does it support the HDMI port? > >> > >> Rawhide as of today supports the hdmi port with 1024x768, once > >> rawhide gets u-boot v2015.04-rc1 it will also support EDID and use > >> your monitors native resolution. > >> > >> The LCD will work, but you need to build your own u-boot: > >> > >> dnf install gcc-arm-linux-gnu > >> git clone https://github.com/jwrdegoede/u-boot-sunxi.git > >> cd u-boot-sunxi > >> git checkout -B sunxi-wip origin/sunxi-wip > >> > >> Then edit configs/A10s-OLinuXino-M_defconfig and configs/A13-OLinuXino_defconfig > >> in the latter you will find a number of CONFIG_VIDEO_LCD_... lines in there, > >> copy those over to the configs/A10s-OLinuXino-M_defconfig file. > >> > >> Then replace CONFIG_VIDEO_LCD_POWER="AXP0-0" with > >> CONFIG_VIDEO_LCD_POWER="PB9" > >> > >> And then do the following to build / install: > >> > >> make -j4 CROSS_COMPILE=arm-linux-gnu- A10s-OLinuXino-M_defconfig > >> make -j4 CROSS_COMPILE=arm-linux-gnu- > >> sudo dd if=u-boot-sunxi-with-spl.bin of=/dev/mmcblk0 bs=1024 seek=8 > >> > >> You will also need an updated dtb, I've attached it for you, simply > >> drop the .dtb file into the dtb-3.... dir on the boot partition. > >> > >> After this u-boot should light up the lcd showin the u-boot tux > >> on gray waterdrop background and some boot messages, and the kernel > >> should take over the lcd framebuffer. > > > > When I booted the board, it lit up the LCD, displayed the Linux logo, > > displayed some text like it was booting. This text appeared to match > > what was being displayed on the console. When the console showed this: > > > > Setting up a 800x480 lcd console > > In: serial > > Out: vga > > Err: vga > > Net: emac > > Starting USB... > > USB0: > > > > The LCD went blank and the whole board seemed to freeze. > > > > Any ideas? > > Only thing I can think of is that the power supply for the board is > not powerful enough, how are you powering the board ? External supply. 5.1V 0.7A Yeah, I might need to look into something at least 1.0A. > > Incidentally, earlier in the boot sequence it printed this: > > > > CPU: Allwinner A10s (SUN5I) > > I2C: ready > > DRAM: 512 MiB > > MMC: SUNXI SD/MMC: 0, SUNXI SD/MMC: 1 > > *** Warning - bad CRC, using default environment > > > > Is this from me overwriting parts of the SD card without updating its > > idea of the CRC? > > The bad CRC message is normal, u-boot can save its environment to the > sdcard, so you can do: > > set foo bar > saveenv > > And from then on the u-boot env. variable foo will be set to var on boot, > until you do a saveenv, the area of the sdcard reserved for the env contains > a non valid env and you get this warning. I usually try to stay away > from save env, as I want to test things with u-boot default env. Ok, as long as this is not serious, I'll not worry about it. Craig _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
