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/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index 2857dcc..4f11097 100644
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -589,6 +589,14 @@
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);
}