Hi Wolfram Sang,
> -----Original Message-----
> From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> Sent: 08 July 2025 21:29
> Subject: Re: [PATCH RFC/RFT 0/2] Enable 64-bit polling mode for R-Car Gen3 and
>
> On Mon, Jun 30, 2025 at 09:13:09AM +0100, Biju Das wrote:
> > 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.
>
> Cool, I had this somewhere on my todo-list as well. I want to test but it will probably be only on
> Friday. But looking forward to it!
Thanks. Also, we need to find a way to handle this issue [1]
[1] https://lore.kernel.org/linux-renesas-soc/TY3PR01MB1134662BDC486D781E5B263878641A@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
Cheers,
Biju
