RE: [git pull] drm for 6.17-rc1

["Varone, Dillon" <Dillon.Varone@amd.com>]

[AMD Official Use Only - AMD Internal Distribution Only]

Yes, that patch Alex linked should also fix the div by zero bug for ASIC's that don't support DSC.

RX580 I think was DCE11, which doesn't support DSC... so all the relevant clocks and caps should be zeroed and gracefully fail any of the DSC checks.

-Dillon

-----Original Message-----
From: Alex Deucher <alexdeucher@gmail.com>
Sent: Thursday, July 31, 2025 9:10 AM
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Airlie <airlied@gmail.com>; Varone, Dillon <Dillon.Varone@amd.com>; LIPSKI, IVAN <IVAN.LIPSKI@amd.com>; Wheeler, Daniel <Daniel.Wheeler@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com>; Liu, Wenjing <Wenjing.Liu@amd.com>; Simona Vetter <simona@ffwll.ch>; dri-devel <dri-devel@lists.freedesktop.org>; LKML <linux-kernel@vger.kernel.org>
Subject: Re: [git pull] drm for 6.17-rc1

On Thu, Jul 31, 2025 at 3:03 AM Linus Torvalds <torvalds@linux-foundation.org> wrote:
>
> On Wed, 30 Jul 2025 at 21:58, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> >
> > d7b618bc41ee3d44c070212dff93949702ede997 is the first bad commit
> >     drm/amd/display: Refactor DSC cap calculations
> >
> > Let me go see how painful it is to just revert it from top-of-tree.
>
> So with that reverted (didn't require a lot of fixing, only minor
> unrelated context added nearby later), current top-of-tree works for
> me again.
>
> The revert I used for testing attached just so people can see exactly
> what I did.
>
> It's late here, I wasn't getting any more work done today anyway, so
> I'll leave it like this for now.
>
> I can continue to do the merge window with this revert purely local
> for a while, so if somebody comes up with a proper fix, I can test
> that out.

I think it may be fixed here:
https://patchwork.freedesktop.org/patch/663973/

Alex

>
>             Linus