On Tue, Jan 25, 2022 at 09:21:11AM -0600, Mario Limonciello wrote: > For some reason this file isn't using the appropriate register > headers for DCN headers, which means that on DCN2 we're getting > the VIEWPORT_DIMENSION offset wrong. > > This means that we're not correctly carving out the framebuffer > memory correctly for a framebuffer allocated by EFI and > therefore see corruption when loading amdgpu before the display > driver takes over control of the framebuffer scanout. > > Fix this by checking the DCE_HWIP and picking the correct offset > accordingly. > > Long-term we should expose this info from DC as GMC shouldn't > need to know about DCN registers. > > Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> > (cherry picked from commit dc5d4aff2e99c312df8abbe1ee9a731d2913bc1b) > --- > This is backported from 5.17-rc1, but doesn't backport cleanly because > v5.16 changed to IP version harvesting for ASIC detection. 5.15.y doesn't > have this. > drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 14 +++++++++++++- > 1 file changed, 13 insertions(+), 1 deletion(-) What stable tree(s) do you want this applied to? And what happened to the original signed-off-by's on the original commit? thanks, greg k-h
