Re: [PATCH v2] drm/amd/display: Look at firmware version to determine using dmub on dcn21

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Nov 15, 2021 at 03:47:24PM +0000, Limonciello, Mario wrote:
> [AMD Official Use Only]
> 
> > -----Original Message-----
> > From: Greg KH <gregkh@linuxfoundation.org>
> > Sent: Monday, November 15, 2021 09:46
> > To: Limonciello, Mario <Mario.Limonciello@amd.com>
> > Cc: stable@vger.kernel.org; Deucher, Alexander
> > <Alexander.Deucher@amd.com>
> > Subject: Re: [PATCH v2] drm/amd/display: Look at firmware version to
> > determine using dmub on dcn21
> > 
> > On Mon, Nov 15, 2021 at 09:36:55AM -0600, Mario Limonciello wrote:
> > > commit 91adec9e0709 ("drm/amd/display: Look at firmware version to
> > > determine using dmub on dcn21")
> > >
> > > Newer DMUB firmware on Renoir and Green Sardine do not need to
> > disable
> > > dmcu and this actually causes problems with DP-C alt mode for a number of
> > > machines.
> > >
> > > Backport the fix from this from hand modified backport because mainline
> > > switched to IP version checking which doesn't exist in linux-stable.
> > >
> > > BugLink:
> > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitla
> > b.freedesktop.org%2Fdrm%2Famd%2F-
> > %2Fissues%2F1772&amp;data=04%7C01%7Cmario.limonciello%40amd.com%
> > 7C6601c50631344fa7148208d9a84f050a%7C3dd8961fe4884e608e11a82d994e1
> > 83d%7C0%7C0%7C637725879609631767%7CUnknown%7CTWFpbGZsb3d8eyJ
> > WIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%
> > 7C3000&amp;sdata=jIGJARLqpAL6Vc6AyK8qVj1yZ7qFm5sXFj%2FerhoMEUc
> > %3D&amp;reserved=0
> > > BugLink:
> > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitla
> > b.freedesktop.org%2Fdrm%2Famd%2F-
> > %2Fissues%2F1735&amp;data=04%7C01%7Cmario.limonciello%40amd.com%
> > 7C6601c50631344fa7148208d9a84f050a%7C3dd8961fe4884e608e11a82d994e1
> > 83d%7C0%7C0%7C637725879609631767%7CUnknown%7CTWFpbGZsb3d8eyJ
> > WIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%
> > 7C3000&amp;sdata=t8iG0MlBgncmZ5Py%2FhWuWBHMbSCCK%2BtFTV4faxcl
> > N3c%3D&amp;reserved=0
> > > Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> > > Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
> > > ---
> > > Changes from v1->v2:
> > >  * Update commit message syntax for hand modified commit
> > >  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 9 ++++++++-
> > >  1 file changed, 8 insertions(+), 1 deletion(-)
> > 
> > What tree(s) are you wanting this backported to?
> 
> 5.13+

Now queued up, thanks.

greg k-h