[U-Boot] [PATCH 0/2] Add sdram capacity auto detect for rk3288

[Vagrant Cascadian <vagrant@debian.org>]

On 2016-09-15, Sandy Patterson wrote:
> An alternative for you might be to disable OF_PLATDATA for firefly and
> enable BACK_TO_BROM.

I wasn't able to successfully build with OF_PLATDATA disabled; sounds
like there are more patches needed for firefly for that to work.


> You may not be getting any output because you didn't modify your burning
> process.
> See the README.rockchip section on CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
> for details, but you have to dd your images slightly differently with this
> macro enabled.

Thanks! Unfortunately, even after using the burning process for
CONFIG_ROCKCHIP_SPL_BACK_TO_BROM described in README.rockchip.

The patches (on top of what was submitted in this series) I've applied
to v2016.09 are:

Index: u-boot/include/common.h
===================================================================
--- u-boot.orig/include/common.h
+++ u-boot/include/common.h
@@ -95,6 +95,10 @@ typedef volatile unsigned char	vu_char;
 #define CONFIG_SYS_SUPPORT_64BIT_DATA
 #endif
 
+#ifndef CONFIG_SPL_BUILD
+#define DEBUG
+#endif
+
 #ifdef DEBUG
 #define _DEBUG	1
 #else

Index: u-boot/arch/arm/mach-rockchip/rk3288/sdram_rk3288.c
===================================================================
--- u-boot.orig/arch/arm/mach-rockchip/rk3288/sdram_rk3288.c
+++ u-boot/arch/arm/mach-rockchip/rk3288/sdram_rk3288.c
@@ -1039,7 +1039,7 @@ static int conv_of_platdata(struct udevi
 	memcpy(&plat->phy_timing, of_plat->rockchip_phy_timing,
 	       sizeof(plat->phy_timing));
 	memcpy(&plat->base, of_plat->rockchip_sdram_params, sizeof(plat->base));
-	plat->num_channels = of_plat->rockchip_num_channels;
+	plat->num_channels = 2;
 	ret = regmap_init_mem_platdata(dev, of_plat->reg,
 				       ARRAY_SIZE(of_plat->reg) / 2,
 				       &plat->map);

Index: u-boot/configs/firefly-rk3288_defconfig
===================================================================
--- u-boot.orig/configs/firefly-rk3288_defconfig
+++ u-boot/configs/firefly-rk3288_defconfig
@@ -70,3 +70,4 @@ CONFIG_USE_TINY_PRINTF=y
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_ERRNO_STR=y
 # CONFIG_SPL_OF_LIBFDT is not set
+CONFIG_ROCKCHIP_SPL_BACK_TO_BROM=y


I think I'll wait for an updated series to do more tests, so I'm not
testing patches on patches on patches. Also reduces the liklihood of me
misinterpreting what people are suggesting to try.


live well,
  vagrant
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