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[2/3] ARM: uniphier: enable CONFIG_MMC_SDHCI_SDMA for ARMv8 SoCs

Message ID 1515247166-20516-3-git-send-email-yamada.masahiro@socionext.com
State Accepted
Commit 3281532ab27f3a9da8821ada30bf3da8782759d4
Headers show
Series ARM: uniphier: updates for v2017.03 MW | expand

Commit Message

Masahiro Yamada Jan. 6, 2018, 1:59 p.m. UTC 
I did not enable SDMA when I added sdhci-cadence support because LD20
boards are equipped with a large amount memory beyond 32 bit address
range, but SDMA does not support the 64bit address.  U-Boot relocates
itself to the end of effectively available RAM.  This would make the
MMC enumeration fail because the buffer for EXT_CSD allocated in the
stack would go too high, then SDMA would fail to transfer data.

Recent SDHCI-compatible controllers support ADMA, but unfortunately
U-Boot does not support ADMA.

In the previous commit, I hided the DRAM area that exceeds the 32 bit
address range.  Now, I can enable CONFIG_MMC_SDHCI_SDMA.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

 configs/uniphier_v8_defconfig | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/configs/uniphier_v8_defconfig b/configs/uniphier_v8_defconfig
index bbcf3b0..2edc3a9 100644
--- a/configs/uniphier_v8_defconfig
+++ b/configs/uniphier_v8_defconfig
@@ -34,6 +34,7 @@  CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS=10
 CONFIG_MMC_UNIPHIER=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_CADENCE=y
+CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_NAND=y
 CONFIG_NAND_DENALI_DT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8