lkml.org 
[lkml]   [2022]   [Nov]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v2 0/3] mmc: xenon: Fix 2G DMA limitation on AC5 SoC
Date
There is a limitation on AC5 SoC that mmc controller
can't have DMA access over 2G memory, so use SDMA with
a bounce buffer. Swiotlb can't help because on arm64 arch
it reserves memblock's at the end of the memory.

Additionally set mask to 34 bit since on AC5 SoC RAM starts
at 0x2_00000000.

Also add compatible string for AC5 SoC.

v2:
#1 Add compatible string for dt-bindings

#2 Use SDMA with a bounce buffer instead of PIO.

Vadym Kochan (3):
dt-bindings: mmc: xenon: Add compatible string for AC5 SoC
mmc: sdhci: Export sdhci_set_dma_mask to be used by the drivers
mmc: xenon: Fix 2G limitation on AC5 SoC

.../bindings/mmc/marvell,xenon-sdhci.yaml | 1 +
drivers/mmc/host/sdhci-xenon.c | 38 +++++++++++++++++++
drivers/mmc/host/sdhci-xenon.h | 3 +-
drivers/mmc/host/sdhci.c | 2 +-
drivers/mmc/host/sdhci.h | 2 +
5 files changed, 44 insertions(+), 2 deletions(-)

--
2.25.1

\
 
 \ /
  Last update: 2022-11-30 14:38    [W:0.063 / U:0.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site