mmc: rockchip_sdhci: Limit number of blocks read in a single command

Using DMA to load TF-A into SRAM fails when booting from eMMC on RK3588.

  ## Checking hash(es) for Image atf-3 ... sha256 error!
  Bad hash value for 'hash' hash node in 'atf-3' image node
  spl_load_simple_fit: can't load image loadables index 2 (ret = -1)
  mmc_load_image_raw_sector: mmc block read error

Fix this by using PIO mode in SPL and limit the number of blocks used in
a single read command to avoid triggering Data End Bit Error interrupt.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

diff --git a/configs/rock5b-rk3588_defconfig b/configs/rock5b-rk3588_defconfig
index 3fcc6a2..d3136ac 100644 (file)
--- a/configs/rock5b-rk3588_defconfig
+++ b/configs/rock5b-rk3588_defconfig
@@ -58,6 +58,7 @@ 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 2857dcc..4f11097 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;
 
+       /*
+        * 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
+        * max 4 blocks in one command when using PIO mode.
+        */
+       if (!(host->flags & USE_DMA))
+               cfg->b_max = 4;
+
        return sdhci_probe(dev);
 }