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[94.27.194.111]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4888a65635fsm65554775e9.6.2026.04.02.04.56.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Apr 2026 04:56:38 -0700 (PDT) From: Timur =?UTF-8?B?S3Jpc3TDs2Y=?= To: Rosen Penev , Greg Kroah-Hartman Cc: stable@vger.kernel.org, Christian =?UTF-8?B?S8O2bmln?= , Alex Deucher , "Pan, Xinhui" , David Airlie , Daniel Vetter , Harry Wentland , Leo Li , Bin Lan , He Zhe , Vitaly Prosyak , Alex Hung , Rodrigo Siqueira , Mario Limonciello , Ray Wu , Wayne Lin , Roman Li , Eric Yang , Tony Cheng , Mauro Rossi , "open list:RADEON and AMDGPU DRM DRIVERS" , "open list:DRM DRIVERS" , open list Subject: Re: [PATCH for 6.12 3/9] drm/amd/display: Disable fastboot on DCE 6 too Date: Thu, 02 Apr 2026 13:56:35 +0200 Message-ID: <2257770.9o76ZdvQCi@timur-hyperion> In-Reply-To: <2026033157-trifocals-swerve-d18f@gregkh> References: <20260326234716.16723-1-rosenp@gmail.com> <2026033157-trifocals-swerve-d18f@gregkh> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On Tuesday, March 31, 2026 1:03:34=E2=80=AFPM Central European Summer Time = Greg Kroah- Hartman wrote: > On Mon, Mar 30, 2026 at 02:38:35PM -0700, Rosen Penev wrote: > > On Mon, Mar 30, 2026 at 7:21=E2=80=AFAM Timur Krist=C3=B3f =20 wrote: > > > On Monday, March 30, 2026 3:55:55=E2=80=AFPM Central European Summer = Time > > > Christian > > >=20 > > > K=C3=B6nig wrote: > > > > On 3/30/26 15:16, Timur Krist=C3=B3f wrote: > > > > > On Friday, March 27, 2026 12:47:10=E2=80=AFAM Central European Su= mmer Time > > > > > Rosen > > > > > Penev> > > > > >=20 > > > > > wrote: > > > > >> From: Timur Krist=C3=B3f > > > > >>=20 > > > > >> [ Upstream commit 7495962cbceb967e095233a5673ea71f3bcdee7e ] > > > > >>=20 > > > > >> It already didn't work on DCE 8, > > > > >> so there is no reason to assume it would on DCE 6. > > > > >>=20 > > > > >> Signed-off-by: Timur Krist=C3=B3f > > > > >> Reviewed-by: Rodrigo Siqueira > > > > >> Reviewed-by: Alex Deucher > > > > >> Reviewed-by: Alex Hung > > > > >> Signed-off-by: Alex Deucher > > > > >> Signed-off-by: Rosen Penev > > > > >=20 > > > > > This patch is incorrect and should not be backported. > > > > >=20 > > > > > (Note that the error is already fixed upstream. For stable kernels > > > > > IMO > > > > > it's > > > > > best to drop this one.) > > > >=20 > > > > Is there some alternative which needs to be backported or should the > > > > old > > > > kernel just work out of the box because we never enabled some featu= re > > > > there? > > > >=20 > > > > Apart from that the patch set looks good to me. > > >=20 > > > This patch had a typo and does the opposite of what it should, ie. it > > > disables eDP fastboot on DCE10 and newer instead of disabling it on > > > DCE8 and older. > > >=20 > > > The upstream fix is here: > > > https://lists.freedesktop.org/archives/amd-gfx/2026-February/138577.h= tml > > > which disables eDP fastboot on DCE10 and older. > >=20 > > Not sure what the process is here. I make sure everything can be git > > cherry-pick ed. In that case, both should be present. >=20 > I agree, I don't understand the problem here. Just take the commits > that are upstream including "fixes for the fixes". >=20 > Timur, what specifically do you want to see happen here? Hi Greg, It's up to you how you prefer to address this. I just wanted to call Rosen'= s=20 attention to the above issue to avoid regressing the stable kernels. I'm happy with either dropping the patch or backporting the patch together= =20 with its fix. Thanks, Timur