NACK: [PATCH 0/1] [mantic:linux] Revert: drm/ast: report connection status on Display Port

[Philip Cox]

Looks like I have found the proper fix for the regression, so will send
out the fix shortly

On Tue, 2023-11-07 at 12:25 +0200, Philip Cox wrote:
> 
> 
> BugLink: https://bugs.launchpad.net/bugs/2042850
> 
> SRU Justification:
> 
> [Impact]
> On systems with Aspeed 2600 revision 52 GPUs, the display fails to
> progress to the login prompt.  Without reverting 
> 
>    commit: 916ae609a033cbb55661905d310ba2358b7621ea
>    Author:  Jocelyn Falempe <jfalempe at redhat.com>
>    Date:    Thu Jul 13 15:41:31 2023 +0200
>    Subject: drm/ast: report connection status on Display Port.
> 
> the kernel command line option of "nomodeset" needs to be passed in
> order to have the system reach the login prompt. 
> 
> 
> [Fix]
> The fix for now is to revert this change to restore the previous
> behaviour.  This will restore the functionality that we had prior to
> the regression in 6.5.0-6.6. 
> 
> [Test Plan]
> I have tested this on multiple versions of Aspeed 2600 GPU enabled
> BMCs, and the revision 52 systems that required the nomodeset option
> to boot, now boot fine, and there is no regression on the other
> systems.
> 
> [Where problems could occur]
> As this reverts the mantic kernel's Aspeed GPU driver to the state it
> was was in the mantic 6.5.0-5.5 kernel, I think there is little room
> for regressions.  
> 
> ----
> 
> Philip Cox (1):
>   UBUNTU: SAUCE: (no-up) Revert "drm/ast: report connection status on
>     Display Port."
> 
>  drivers/gpu/drm/ast/ast_dp.c    | 11 ----------
>  drivers/gpu/drm/ast/ast_dp501.c | 37 +++++++++++--------------------
> --
>  drivers/gpu/drm/ast/ast_drv.h   |  2 --
>  drivers/gpu/drm/ast/ast_mode.c  | 30 ++------------------------
>  4 files changed, 14 insertions(+), 66 deletions(-)
> 

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