[U-Boot] [RESENT PATCH v3] rockchip: update emmc/sd index for distro boot order

[Philipp Tomsich <philipp.tomsich@theobroma-systems.com>]

Kever,

> On 28.11.2018, at 03:06, Kever Yang <kever.yang@rock-chips.com> wrote:
> 
> According to the emmc/sdcard index in dts alias, emmc is always 0 and
> sdcard index is 1, let's update to using correct mmc number for distro
> boot order in common header.
> 
> SD card suppost to have higher priority so that people can boot into
> the firmware in SD card, this is very convenient for developer try with
> distro img from SUSE, Fedora and etc. Developer only need to 'dd' the
> Distro image(which id download from OS vendor release) into SD card without
> any modify and then we can boot it up directly.

You never addressed the review comment from Klaus (from the review in May):

> Also prioritising SD card over eMMC does not make any sense to me. At least on
> RK3399 and RK3368 the default ROM boot order is first eMMC then SD card. So 
> starting U-Boot from eMMC and then loading the Kernel from SD-card doesn’t sound
> right for me. 

This will change default behaviour and may break things for users in the field.
Before we can move forward, we really need to establish a consensus on this
and how users will be affected.

While this doesn’t matter much for our boards, as we have logic to rewrite the
default boot during boot-up anyway, I expect a lot of trouble for mainline users
with their own boards...

> Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
> ---
> 
> Changes in v3:
> - update the commit message
> Series-changes: 2
> - update the commit message
> 
> include/configs/rockchip-common.h | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/include/configs/rockchip-common.h b/include/configs/rockchip-common.h
> index 68e1105a4b..8a72613e52 100644
> --- a/include/configs/rockchip-common.h
> +++ b/include/configs/rockchip-common.h
> @@ -11,11 +11,11 @@
> 
> #ifndef CONFIG_SPL_BUILD
> 
> -/* First try to boot from SD (index 0), then eMMC (index 1) */
> +/* First try to boot from SD (index 1), then eMMC (index 0) */
> #if CONFIG_IS_ENABLED(CMD_MMC)
> 	#define BOOT_TARGET_MMC(func) \
> -		func(MMC, mmc, 0) \
> -		func(MMC, mmc, 1)
> +		func(MMC, mmc, 1) \
> +		func(MMC, mmc, 0)
> #else
> 	#define BOOT_TARGET_MMC(func)
> #endif
> -- 
> 2.18.0
>