Bumping for visibility. Any other CCs I should add? I've been trying to submit these patches for a few weeks now.
On Friday, 12 December 2025, <[email protected]> wrote: > From: Alex Ramirez <[email protected]> > > uconn.c's handling of display connectors was refactored for Linux v6.5, > causing a regression that issues a warning on boot for GeForce 8600m GT > (MacBookPro4,1) > and likely other legacy GPUs. > > Several connector types used to be implicitly supported before v6.5 by a > branch in > [drm/nouveau/nouveau_connector.c:1353] that determined connector types > using encoder > bits, but these connectors have since been left entirely unhandled after > the refactor: > the aforementioned kernel warning causes that branch to never be taken. > > nv_connector->type is generally 0x0 (DCB_CONNECTOR_VGA) in the case of an > unknown > connector because the WARN_ON macro in [drm/nouveau/nvkm/engine/disp/ > uconn.c:214] > causes nvkm_uconn_new to bail out before a suitable connector value is > chosen; > it *seems* like the value is left undefined. > > This patch set implements the missing DCB connector values per NVIDIA spec > to fix the > root cause of the warning AND changes the WARN_ON macro in uconn.c to a > printk message > to more gracefully indicate unknown connector types, as was done pre-v6.5. > > v2: Include better commit messages. My original submission was partially > blocked by a spam filter. > > v3: Update NVIDIA documentation link according to Petr Vorel's suggestion. > > Alex RamÃrez (2): > drm/nouveau: add missing DCB connector types > drm/nouveau: implement missing DCB connector types; gracefully handle > unknown connectors > > .../nouveau/include/nvkm/subdev/bios/conn.h | 84 ++++++++++++++----- > .../gpu/drm/nouveau/nvkm/engine/disp/uconn.c | 73 +++++++++++----- > 2 files changed, 116 insertions(+), 41 deletions(-) > > -- > 2.52.0 > >
