[PATCH for 6.12 8/9] drm/amd/display: Disable scaling on DCE6 for now
From: Rosen Penev
Date: Thu Mar 26 2026 - 19:52:44 EST
From: Timur Kristóf <timur.kristof@xxxxxxxxx>
[ 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 (v10)")
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Timur Kristóf <timur.kristof@xxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
---
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/drivers/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 = {
},
.max_upscale_factor = {
- .argb8888 = 16000,
+ .argb8888 = 1,
.nv12 = 1,
.fp16 = 1
},
.max_downscale_factor = {
- .argb8888 = 250,
+ .argb8888 = 1,
.nv12 = 1,
.fp16 = 1
}
--
2.53.0