search for: nvif_outp_inherit_v0

Signed-off-by: Lyude Paul <lyude at redhat.com> --- drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c index 6094805fbd63..06b19883a06b 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c +++

...x05 #define NVIF_OUTP_V0_DP_RETRAIN 0x06 #define NVIF_OUTP_V0_DP_MST_VCPI 0x07 +#define NVIF_OUTP_V0_INHERIT 0x08 union nvif_outp_load_detect_args { struct nvif_outp_load_detect_v0 { @@ -69,6 +70,23 @@ union nvif_outp_acquire_args { } v0; }; +union nvif_outp_inherit_args { + struct nvif_outp_inherit_v0 { + __u8 version; +#define NVIF_OUTP_INHERIT_V0_RGB_CRT 0x00 +#define NVIF_OUTP_INHERIT_V0_TV 0x01 +#define NVIF_OUTP_INHERIT_V0_TMDS 0x02 +#define NVIF_OUTP_INHERIT_V0_LVDS 0x03 +#define NVIF_OUTP_INHERIT_V0_DP 0x04 + // In/out. Input is one of the above values, output is the act...

Turns out we made a silly mistake when coming up with OR inheritance on nouveau. On pre-DCB 4.1, iors are statically routed to output paths via the DCB. On later generations iors are only routed to an output path if they're actually being used. Unfortunately, it appears with NVIF_OUTP_INHERIT_V0 we make the mistake of assuming the later is true on all generations, which is currently leading us to return bogus ior -> head assignments through nvif, which causes WARN_ON(). So - fix this by verifying that we actually know that there's a head assigned to an ior before allowing it to be...