I'm not saying this is wrong, but could you file a bug at gitlab.freedesktop.org/drm/nouveau/-/issues and include the VBIOS (/sys/kernel/debug/dri/0/vbios.rom)? That would make it easier to review the full situation.
On Mon, Feb 14, 2022 at 11:03 AM Icenowy Zheng icenowy@aosc.io wrote:
On PowerBook6,1 (PowerBook G4 867 12") HWSQ entry 0 (which is currently always used by nouveau) fails, but the BIOS declares 2 HWSQ entries and entry 1 works.
Add a quirk to use HWSQ entry 1.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
drivers/gpu/drm/nouveau/nouveau_bios.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c index e8c445eb11004..2691d0e0cf9f1 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bios.c +++ b/drivers/gpu/drm/nouveau/nouveau_bios.c @@ -1977,6 +1977,13 @@ static int load_nv17_hw_sequencer_ucode(struct drm_device *dev, if (!hwsq_offset) return 0;
+#ifdef __powerpc__
/* HWSQ entry 0 fails on PowerBook G4 867 12" (Al) */if (of_machine_is_compatible("PowerBook6,1"))return load_nv17_hwsq_ucode_entry(dev, bios,hwsq_offset + sz, 1);+#endif
/* always use entry 0? */ return load_nv17_hwsq_ucode_entry(dev, bios, hwsq_offset + sz, 0);}
2.30.2