Il 11/06/21 22:33, Konrad Dybcio ha scritto:
Add support for SONY Xperia 1 and 5 smartphones, both based on the
Qualcomm SM8150 chipset. There also exist 5G-capable versions of these
devices, but they weren't sold much (if at all) outside Japan.
The devices are affected by a scary UFS behaviour where sending a certain UFS
command (which is worked around on downstream) renders the device unbootable,
by effectively erasing the bootloader. Therefore UFS AND UFSPHY are strictly
disabled for now.
Downstream workaround:
https://github.com/kholk/kernel/commit/2e7a9ee1c91a016baa0b826a7752ec45663a0561
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxx>
Tested on Xperia 1 (Griffin) with a small initrd system (sorry, no time
to flash a full fledged system!) and boots just fine.
On a note, I would like to bring to the attention of other developers
that we actually tried to get informations about the UFS quirks that
all Sony devices require, as they seem to be required "on purpose",
meaning that it's not a hardware/firmware bug, but rather an intentional
"feature", but nobody has been open to give such informations to us,
which made us unable to understand what's the best way to address this
kind of quirk here on mainline.
If anybody has such informations, or if anybody can give us a hint about
how can we properly/cleanly implement the Sony UFS quirks, we're totally
open for any kind of suggestion.
Thanks!
Reviewed-by: AngeloGioacchino Del Regno
<angelogioacchino.delregno@xxxxxxxxxxxxxx>
Tested-by: AngeloGioacchino Del Regno
<angelogioacchino.delregno@xxxxxxxxxxxxxx>
