Re: [PATCH] mmc: meson-gx: limit segments to 1 when dram-access-quirk is needed

[Kevin Hilman]

Neil Armstrong <narmstrong@xxxxxxxxxxxx> 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 <art@xxxxxxxxxx>
> Reported-by: Christian Hewitt <christianshewitt@xxxxxxxxx>
> Fixes: acdc8e71d9bb ("mmc: meson-gx: add dram-access-quirk")
> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>

Reviewed-by: Kevin Hilman <khilman@xxxxxxxxxxxx>