[Public]
-----Original Message----- From: Wentland, Harry Harry.Wentland@amd.com Sent: Monday, October 18, 2021 9:57 AM To: Limonciello, Mario Mario.Limonciello@amd.com; Li, Roman Roman.Li@amd.com; amd-gfx@lists.freedesktop.org; Deucher, Alexander Alexander.Deucher@amd.com; Siqueira, Rodrigo Rodrigo.Siqueira@amd.com Cc: stable@vger.kernel.org Subject: Re: [PATCH] drm/amd/display: Fully switch to dmub for all dcn21 asics
On 2021-10-18 09:41, Limonciello, Mario wrote:
On 10/15/2021 17:31, Roman.Li@amd.com wrote:
From: Roman Li Roman.Li@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 With new dmub f/w dmcu is superseded and should be disabled.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%3E%3E%3E Cc: stable@vger.kernel.org
This won't backport cleanly to stable 5.15 and earlier don't use IP version to
detect the chip.
Also - a question: *should* this go to stable? If a user has the older FW what
happens with this change?
Good point. Might be better of we drop Cc: stable from this patch
Harry
I will drop Cc: stable@vger.kernel.org, thank you Mario and Harry. - Roman
Signed-off-by: Roman Li Roman.Li@amd.com
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):