[U-Boot] [PATCH 3/4] udoo: Adjust default boot envirnment

[Stefano Babic]

Hi Giuseppe,

On 06/11/2013 21:44, Giuseppe Pagano wrote:
> Change u-boot default environment for uDoo board to:
>   - mount /dev/mmcblk0p1 partition
>   - activate hdmi monitor by default (instead of nothing)
> 
> Signed-off-by: Giuseppe Pagano <giuseppe.pagano at seco.com>
> Cc: sbabic at denx.de
> 
> ---
> 
> diff -uNr a/include/configs/udoo.h b/include/configs/udoo.h
> --- a/include/configs/udoo.h	2013-11-06 18:51:57.000000000 +0100
> +++ b/include/configs/udoo.h	2013-11-06 18:52:16.000000000 +0100
> @@ -100,7 +100,7 @@
>  
>  #define CONFIG_EXTRA_ENV_SETTINGS \
>  	"script=boot.scr\0" \
> -	"uimage=uImage\0" \
> +	"uimage=/boot/uImage\0" \
>  	"console=ttymxc1\0" \
>  	"splashpos=m,m\0" \
>  	"fdt_high=0xffffffff\0" \
> @@ -111,7 +111,7 @@
>  	"ip_dyn=yes\0" \
>  	"mmcdev=0\0" \
>  	"mmcpart=1\0" \
> -	"mmcroot=/dev/mmcblk0p2 rootwait rw\0" \
> +	"mmcroot=/dev/mmcblk0p1 rootwait rw\0" \
>  	"update_sd_firmware_filename=u-boot.imx\0" \
>  	"update_sd_firmware=" \
>  		"if test ${ip_dyn} = yes; then " \
> @@ -127,13 +127,14 @@
>  			"fi; "  \
>  		"fi\0" \
>  	"mmcargs=setenv bootargs console=${console},${baudrate} " \
> -		"root=${mmcroot}\0" \
> +		"root=${mmcroot} rootwait rw " \
> +		"fbmem=24M video=mxcfb0:dev=hdmi,1920x1080M at 60,if=RGB24\0" \
>  	"loadbootscript=" \
> -		"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
> +		"ext2load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \

I have already explained my doubts regarding the abuse of
EXTRA_ENV_SETTINGS. The setup that should be minimal and general for
most of uses is then customized for a specific scope, that conflict with
other goals. You are changing the filesystem on the card: I cannot
estimate how this can be useful for everyone (maybe yes, maybe not).

I hope that Simon's patches to split the default environment from the
configuration file will find soon a way to mainline. Check in the ML for

	"env: Add support for environment files"

Then it will be possible to define an own text file containing the
environment outside of the configuration file. And adding a new default
environment will mean only to specify the env file in boards.cfg.

>  	"bootscript=echo Running bootscript from mmc ...; " \
>  		"source\0" \
> -	"loaduimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${uimage}\0"
> \
> -	"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \
> +	"loaduimage=ext2load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${uimage}\0"
> \
> +	"loadfdt=ext2load mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0"
> \
>  	"mmcboot=echo Booting from mmc ...; " \
>  		"run mmcargs; " \
>  		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
> @@ -189,7 +190,7 @@
>  /* Miscellaneous configurable options */
>  #define CONFIG_SYS_LONGHELP
>  #define CONFIG_SYS_HUSH_PARSER
> -#define CONFIG_SYS_PROMPT             "=> "
> +#define CONFIG_SYS_PROMPT		"uDoo board >"
>  #define CONFIG_AUTO_COMPLETE
>  #define CONFIG_SYS_CBSIZE              256

We had already some discussion on the mailing list about the meaning and
the usefulness of the U-Boot prompt. I will apply a patch for all
Freescale boards that remove a custom prompt, letting the default. Which
is the improvement to have a custom prompt ?

Maybe you are the second one asking for the feature:

http://u-boot.10912.n7.nabble.com/Changing-CONFIG-SYS-PROMPT-on-the-fly-td166105.html

As suggested by Simon (take a look at the whole thread), it is then
better to set the prompt from an environment variable. Feel free to
submit a patch for it.

Best regards,
Stefano Babic

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