On 2021-10-15 18:31, roman...@amd.com wrote:
> From: Roman Li <roman...@amd.com>
>
> [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 With new dmub f/w dmcu is superseded and should be disabled.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: sta...@vger.kernel.org
> Signed-off-by: Roman Li <roman...@amd.com>
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
Harry
> ---
> 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):
>
