[PATCH 4/5] rockchip: rock-pi-4: Use SDMA to boost eMMC performance

[Jonas Karlman]

Enable the use of SDMA mode to boost eMMC performance on ROCK Pi 4.
Also add missing flags to indicate the supported MMC modes.

Using mmc read command to read 32 MiB data shows following improvement:

  => time mmc read 10000000 2000 10000

Before: time: 3.178 seconds
After: time: 0.402 seconds

This also enables CONFIG_SPL_FIT_SIGNATURE option to help discover
any possible future issue with loading TF-A into DRAM/SRAM.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi | 6 ++++++
 configs/rock-pi-4-rk3399_defconfig        | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi b/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi
index c17e769f649f..60122f3bcd6c 100644
--- a/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi
@@ -12,6 +12,12 @@
 	};
 };
 
+&sdhci {
+	cap-mmc-highspeed;
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
+};
+
 &vdd_log {
 	regulator-init-microvolt = <950000>;
 };
diff --git a/configs/rock-pi-4-rk3399_defconfig b/configs/rock-pi-4-rk3399_defconfig
index 1e96fa706ac4..ee5b4f395a00 100644
--- a/configs/rock-pi-4-rk3399_defconfig
+++ b/configs/rock-pi-4-rk3399_defconfig
@@ -19,6 +19,7 @@ CONFIG_SYS_LOAD_ADDR=0x800800
 CONFIG_PCI=y
 CONFIG_DEBUG_UART=y
 # CONFIG_ANDROID_BOOT_IMAGE is not set
+CONFIG_SPL_FIT_SIGNATURE=y
 CONFIG_DEFAULT_FDT_FILE="rockchip/rk3399-rock-pi-4b.dtb"
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_MISC_INIT_R=y
@@ -56,6 +57,7 @@ CONFIG_ROCKCHIP_EFUSE=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_ROCKCHIP=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_GMAC_ROCKCHIP=y
-- 
2.40.1