linux-kernel - Re: [PATCH v3 0/2] Enable 64-bit polling mode for R-Car Gen3 and RZ/G2+ family

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Message-ID: <CAPDyKFp4HDMqPd3ie3R61EFWGGhLUE+f6mKHdZa5surfrd3jbQ@mail.gmail.com>
Date: Mon, 18 Aug 2025 12:55:06 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Biju <biju.das.au@...il.com>
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>, Biju Das <biju.das.jz@...renesas.com>, 
	linux-mmc@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v3 0/2] Enable 64-bit polling mode for R-Car Gen3 and
 RZ/G2+ family

On Wed, 30 Jul 2025 at 18:46, Biju <biju.das.au@...il.com> wrote:
>
> From: Biju Das <biju.das.jz@...renesas.com>
>
> As per the RZ/{G2L,G3E} HW manual SD_BUF0 can be accessed by 16/32/64
> bits. Most of the data transfer in SD/SDIO/eMMC mode is more than 8 bytes.
> During testing it is found that, if the DMA buffer is not aligned to 128
> bit it fallback to PIO mode. In such cases, 64-bit access is much more
> efficient than the current 16-bit.
>
> v2->v3:
>  * Added header file linux/io.h
>  * Replaced io{read,write}64_rep->{read,write}sq to fix the build error
>    reported by the bot.
> RFT->v2:
>  * Collected tags
>  * Fixed the build error reported by the bot.
>
> Biju Das (2):
>   mmc: tmio: Add 64-bit read/write support for SD_BUF0 in polling mode
>   mmc: renesas_sdhi: Enable 64-bit polling mode
>
>  drivers/mmc/host/renesas_sdhi_internal_dmac.c |  3 +-
>  drivers/mmc/host/tmio_mmc.h                   | 15 +++++++++
>  drivers/mmc/host/tmio_mmc_core.c              | 33 +++++++++++++++++++
>  include/linux/platform_data/tmio.h            |  3 ++
>  4 files changed, 53 insertions(+), 1 deletion(-)
>

The series applied for next, thanks!

Kind regards
Uffe