linux-kernel - Re: [PATCH v3 1/5] ACPI: video: Handle fetching EDID that is longer than 256 bytes

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Message-ID: <CAJZ5v0iZTJtMwZLGFovoLbFTP=OG=L6ZLgBbLU2ob5_X6OLB0A@mail.gmail.com>
Date: Tue, 6 Feb 2024 20:43:36 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Mario Limonciello <mario.limonciello@....com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, amd-gfx@...ts.freedesktop.org, 
	Alex Deucher <alexander.deucher@....com>, Harry Wentland <harry.wentland@....com>, 
	Hans de Goede <hdegoede@...hat.com>, "open list:ACPI" <linux-acpi@...r.kernel.org>, 
	open list <linux-kernel@...r.kernel.org>, 
	"open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>, Melissa Wen <mwen@...lia.com>, 
	Mark Pearson <mpearson-lenovo@...ebb.ca>
Subject: Re: [PATCH v3 1/5] ACPI: video: Handle fetching EDID that is longer
 than 256 bytes

On Fri, Feb 2, 2024 at 5:09 PM Mario Limonciello
<mario.limonciello@....com> wrote:
>
> On 2/2/2024 10:07, Rafael J. Wysocki wrote:
> > On Thu, Feb 1, 2024 at 11:11 PM Mario Limonciello
> > <mario.limonciello@....com> wrote:
> >>
> >> The ACPI specification allows for an EDID to be up to 512 bytes but
> >> the _DDC EDID fetching code will only try up to 256 bytes.
> >>
> >> Modify the code to instead start at 512 bytes and work it's way
> >> down instead.
> >>
> >> As _DDC is now called up to 4 times on a machine debugging messages
> >> are noisier than necessary.  Decrease from info to debug.
> >>
> >> Link: https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/Apx_B_Video_Extensions/output-device-specific-methods.html#ddc-return-the-edid-for-this-device
> >> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> >
> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> >
> > or I can apply it if that's preferred.
>
> Thanks!
>
> I think go ahead and apply this one to your -next tree.

Applied now.

Barring any issues with it, It will get into linux-next in a couple of days.

Thanks!