Re: [PATCH] mmc: meson-gx: limit segments to 1 when dram-access-quirk is needed
From: Kevin Hilman <khilman@baylibre.com>
Date: 2020-06-09 14:54:30
Also in:
linux-amlogic, linux-mmc, lkml
Neil Armstrong [off-list ref] writes:
The actual max_segs computation leads to failure while using the broadcom
sdio brcmfmac/bcmsdh driver, since the driver tries to make usage of scatter
gather.
But with the dram-access-quirk we use a 1,5K SRAM bounce buffer, and the
max_segs current value of 3 leads to max transfers to 4,5k, which doesn't work.
This patch sets max_segs to 1 to better describe the hardware limitation,
and fix the SDIO functionnality with the brcmfmac/bcmsdh driver on Amlogic
G12A/G12B SoCs on boards like SEI510 or Khadas VIM3.
Reported-by: Art Nikpal <redacted>
Reported-by: Christian Hewitt <redacted>
Fixes: acdc8e71d9bb ("mmc: meson-gx: add dram-access-quirk")
Signed-off-by: Neil Armstrong <redacted>Reviewed-by: Kevin Hilman <khilman@baylibre.com> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel