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Tue, 31 Mar 2026 17:39:42 -0700 (PDT) From: Rosen Penev To: stable@vger.kernel.org Cc: Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , Xinhui Pan , David Airlie , Simona Vetter , Harry Wentland , Leo Li , Rodrigo Siqueira , Ray Wu , Wayne Lin , Mario Limonciello , Roman Li , Eric Yang , Tony Cheng , Mauro Rossi , =?UTF-8?q?Timur=20Krist=C3=B3f?= , Alex Hung , amd-gfx@lists.freedesktop.org (open list:RADEON and AMDGPU DRM DRIVERS), dri-devel@lists.freedesktop.org (open list:DRM DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCHv2 for 6.12 08/10] drm/amd/display: Disable scaling on DCE6 for now Date: Tue, 31 Mar 2026 17:39:06 -0700 Message-ID: <20260401003908.3438-9-rosenp@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260401003908.3438-1-rosenp@gmail.com> References: <20260401003908.3438-1-rosenp@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Timur Krist=C3=B3f [ Upstream commit 0e190a0446ec517666dab4691b296a9b758e590f ] Scaling doesn't work on DCE6 at the moment, the current register programming produces incorrect output when using fractional scaling (between 100-200%) on resolutions higher than 1080p. Disable it until we figure out how to program it properly. Fixes: 7c15fd86aaec ("drm/amd/display: dc/dce: add initial DCE6 support (v1= 0)") Reviewed-by: Alex Deucher Signed-off-by: Timur Krist=C3=B3f Signed-off-by: Alex Deucher Signed-off-by: Rosen Penev --- drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c b/driver= s/gpu/drm/amd/display/dc/dce60/dce60_resource.c index 978c024c97ba..3f9ea4fdc7d8 100644 --- a/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dce60/dce60_resource.c @@ -404,13 +404,13 @@ static const struct dc_plane_cap plane_cap =3D { }, =20 .max_upscale_factor =3D { - .argb8888 =3D 16000, + .argb8888 =3D 1, .nv12 =3D 1, .fp16 =3D 1 }, =20 .max_downscale_factor =3D { - .argb8888 =3D 250, + .argb8888 =3D 1, .nv12 =3D 1, .fp16 =3D 1 } --=20 2.53.0