mmc: rockchip_sdhci: Disable DMA mode using a device tree property

Loading part of TF-A into SRAM from eMMC using DMA fails on RK3399
similar to other Rockchip SoCs. Checksum validation fails with:

  ## Checking hash(es) for Image atf-2 ... sha256 error!
  Bad hash value for 'hash' hash node in 'atf-2' image node
  spl_load_simple_fit: can't load image loadables index 1 (ret = -1)
  mmc_load_image_raw_sector: mmc block read error
  SPL: failed to boot from all boot devices
  ### ERROR ### Please RESET the board ###

Add a device tree property, u-boot,spl-fifo-mode, to control when the
rockchip_sdhci driver should disable the use of DMA and fallback on PIO
mode. Same device tree property is used by the rockchip_dw_mmc driver.

In commit 2cc6cde647e2 ("mmc: rockchip_sdhci: Limit number of blocks
read in a single command") the DMA mode was disabled using a CONFIG
option on RK3588. Revert that and instead disable DMA using the device
tree property for all RK3588 boards, also apply similar workaround for
all RK3399 boards.

Fixes: 2cc6cde647e2 ("mmc: rockchip_sdhci: Limit number of blocks read in a single command")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Quentin Schulz <foss+uboot@0leil.net> # RK3399 Puma, RK3588 Tiger

diff --git a/arch/arm/dts/rk3399-u-boot.dtsi b/arch/arm/dts/rk3399-u-boot.dtsi
index e677ae6..3423b88 100644 (file)
--- a/arch/arm/dts/rk3399-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-u-boot.dtsi
@@ -120,6 +120,7 @@
 &sdhci {
        max-frequency = <200000000>;
        bootph-all;
+       u-boot,spl-fifo-mode;
 };
 
 &sdmmc {

diff --git a/arch/arm/dts/rk3588s-u-boot.dtsi b/arch/arm/dts/rk3588s-u-boot.dtsi
index cd7e6cb..922cae3 100644 (file)
--- a/arch/arm/dts/rk3588s-u-boot.dtsi
+++ b/arch/arm/dts/rk3588s-u-boot.dtsi
@@ -153,6 +153,7 @@
 
 &sdhci {
        bootph-pre-ram;
+       u-boot,spl-fifo-mode;
 };
 
 &uart2 {

diff --git a/configs/rock5b-rk3588_defconfig b/configs/rock5b-rk3588_defconfig
index c57de5a..fc76d93 100644 (file)
--- a/configs/rock5b-rk3588_defconfig
+++ b/configs/rock5b-rk3588_defconfig
@@ -60,7 +60,6 @@ CONFIG_MMC_DW=y
 CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_SDMA=y
-# CONFIG_SPL_MMC_SDHCI_SDMA is not set
 CONFIG_MMC_SDHCI_ROCKCHIP=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_GMAC_ROCKCHIP=y

diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index 8e4a158..285332d 100644 (file)
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -589,6 +589,14 @@ static int rockchip_sdhci_probe(struct udevice *dev)
        if (ret)
                return ret;
 
+       /*
+        * Disable use of DMA and force use of PIO mode in SPL to fix an issue
+        * where loading part of TF-A into SRAM using DMA silently fails.
+        */
+       if (IS_ENABLED(CONFIG_SPL_BUILD) &&
+           dev_read_bool(dev, "u-boot,spl-fifo-mode"))
+               host->flags &= ~USE_DMA;
+
        /*
         * Reading more than 4 blocks with a single CMD18 command in PIO mode
         * triggers Data End Bit Error on RK3568 and RK3588. Limit to reading