linux-kernel - Re: [PATCH v2] mtd: intel-dg: wake card on operations

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Message-ID: <87wm4ns10j.fsf@bootlin.com>
Date: Wed, 22 Oct 2025 12:07:24 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Alexander Usyskin <alexander.usyskin@...el.com>
Cc: Richard Weinberger <richard@....at>,  Vignesh Raghavendra
 <vigneshr@...com>,  linux-mtd@...ts.infradead.org,
  linux-kernel@...r.kernel.org,  Andy Shevchenko
 <andriy.shevchenko@...ux.intel.com>,  Reuven Abliyev
 <reuven.abliyev@...el.com>,  Lucas De Marchi <lucas.demarchi@...el.com>
Subject: Re: [PATCH v2] mtd: intel-dg: wake card on operations

Hi Alexander,

On 21/10/2025 at 15:32:46 +03, Alexander Usyskin <alexander.usyskin@...el.com> wrote:

> The Intel DG cards do not have separate power control for
> persistent memory.
> The memory is available when the whole card is awake.
>
> Enable runtime PM in mtd driver to notify parent graphics driver
> that whole card should be kept awake while nvm operations are
> performed through this driver.
>
> CC: Lucas De Marchi <lucas.demarchi@...el.com>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
> ---

I am curious to know why this now works, whereas in your previous
attempt (which had to be reverted) we had to do a lot more.

Thanks,
Miquèl