On Fri, Oct 15, 2021 at 6:33 PM <Roman.Li@xxxxxxx> wrote: > > From: Roman Li <Roman.Li@xxxxxxx> > > [Why] > On renoir usb-c port stops functioning on resume after f/w update. > New dmub firmware caused regression due to conflict with dmcu. > With new dmub f/w dmcu is superseded and should be disabled. > > [How] > - Disable dmcu for all dcn21. > > Check dmesg for dmub f/w version. > The old firmware (before regression): > [drm] DMUB hardware initialized: version=0x00000001 > All other versions require that patch for renoir. > > Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1735 > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Roman Li <Roman.Li@xxxxxxx> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx> > --- > drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > index ff54550..e56f73e 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > @@ -1356,8 +1356,7 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) > switch (adev->ip_versions[DCE_HWIP][0]) { > case IP_VERSION(2, 1, 0): > init_data.flags.gpu_vm_support = true; > - if (ASICREV_IS_GREEN_SARDINE(adev->external_rev_id)) > - init_data.flags.disable_dmcu = true; > + init_data.flags.disable_dmcu = true; > break; > case IP_VERSION(1, 0, 0): > case IP_VERSION(1, 0, 1): > -- > 2.7.4 >
