[RFC] [PATCH] rockchip: Pinebook Pro: fix mmc boot ordering

[lindsey.stanpoor at gmail.com]

From: Cameron Nemo <cnemo at tutanota.com>

On the Pinebook Pro, and perhaps some other boards, the mmc indices are
opposite from what is implied by the comment in
include/configs/rockchip-common.h.

This commit fixes the boot ordering to prioritize the SD card over eMMC.

I am not sure if this appropriate for the Pinebook Pro alone (only board
I can test with atm), or other boards as well (rk3399 or otherwise).

Most distributions of U-Boot that actually target rk3399 boards apply a
similar patch, such as Manjaro (shipped by default on PBP) and armbian.

https://gitlab.manjaro.org/manjaro-arm/packages/core/uboot-pinebookpro/-/blob/60ed56b9bf8809309ec6252bfc45bca38c2b858a/0002-Correct-boot-order-to-be-USB-SD-eMMC.patch
https://github.com/armbian/build/blob/5a2b2c360b9c26ca4bd0d309af7cd3994fd08b7d/patch/u-boot/u-boot-rockchip64-mainline/general-prioritize-sd.patch

Signed-off-by: Cameron Nemo <cnemo at tutanota.com>
---
 include/configs/pinebook-pro-rk3399.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/configs/pinebook-pro-rk3399.h b/include/configs/pinebook-pro-rk3399.h
index d478b19917..59780bfb0b 100644
--- a/include/configs/pinebook-pro-rk3399.h
+++ b/include/configs/pinebook-pro-rk3399.h
@@ -14,6 +14,14 @@
 
 #include <configs/rk3399_common.h>
 
+/* On Pinebook Pro, mmc1 is SD and mmc0 is eMMC */
+#if CONFIG_IS_ENABLED(CMD_MMC)
+	#undef BOOT_TARGET_MMC
+	#define BOOT_TARGET_MMC(func) \
+		func(MMC, mmc, 1) \
+		func(MMC, mmc, 0)
+#endif
+
 #define SDRAM_BANK_SIZE			(2UL << 30)
 
 #define CONFIG_USB_OHCI_NEW
-- 
2.28.0