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drm/nouveau/disp: add dp sst config method

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This is presently unused on HW, we read a bunch of regs and calculate
the watermark during the second supervisor interrupt.

I don't want to change this yet as I need to re-remember how older HW
works exactly, but RM wants this info via RPC.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Danilo Krummrich <me@dakr.org>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230919220442.202488-35-lyude@redhat.com
This commit is contained in:
Ben Skeggs 2023-09-19 17:56:29 -04:00 • committed by Lyude Paul
parent 3147ce0d07
commit e206cae1e5
5 changed files with 54 additions and 0 deletions
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12
drivers/gpu/drm/nouveau/include/nvif/if0012.h
View file

@ -36,6 +36,7 @@ union nvif_outp_args {
#define NVIF_OUTP_V0_DP_RATES 0x72
#define NVIF_OUTP_V0_DP_TRAIN 0x73
#define NVIF_OUTP_V0_DP_DRIVE 0x74
#define NVIF_OUTP_V0_DP_SST 0x75
#define NVIF_OUTP_V0_DP_MST_VCPI 0x78
union nvif_outp_detect_args {
@ -222,6 +223,17 @@ union nvif_outp_dp_drive_args {
} v0;
};
union nvif_outp_dp_sst_args {
struct nvif_outp_dp_sst_v0 {
__u8 version;
__u8 head;
__u8 pad02[2];
__u32 watermark;
__u32 hblanksym;
__u32 vblanksym;
} v0;
};
union nvif_outp_dp_mst_vcpi_args {
struct nvif_outp_dp_mst_vcpi_v0 {
__u8 version;

1
drivers/gpu/drm/nouveau/include/nvif/outp.h
View file

@ -68,6 +68,7 @@ int nvif_outp_dp_train(struct nvif_outp *, u8 dpcd[DP_RECEIVER_CAP_SIZE],
u8 lttprs, u8 link_nr, u32 link_bw, bool mst, bool post_lt_adj,
bool retrain);
int nvif_outp_dp_drive(struct nvif_outp *, u8 link_nr, u8 pe[4], u8 vs[4]);
int nvif_outp_dp_sst(struct nvif_outp *, int head, u32 watermark, u32 hblanksym, u32 vblanksym);
int nvif_outp_dp_mst_vcpi(struct nvif_outp *, int head,
u8 start_slot, u8 num_slots, u16 pbn, u16 aligned_pbn);
#endif

18
drivers/gpu/drm/nouveau/nvif/outp.c
View file

@ -46,6 +46,24 @@ nvif_outp_dp_mst_vcpi(struct nvif_outp *outp, int head,
return ret;
}
int
nvif_outp_dp_sst(struct nvif_outp *outp, int head, u32 watermark, u32 hblanksym, u32 vblanksym)
{
struct nvif_outp_dp_sst_v0 args;
int ret;
args.version = 0;
args.head = head;
args.watermark = watermark;
args.hblanksym = hblanksym;
args.vblanksym = vblanksym;
ret = nvif_object_mthd(&outp->object, NVIF_OUTP_V0_DP_SST, &args, sizeof(args));
NVIF_ERRON(ret, &outp->object,
"[DP_SST head:%d watermark:%d hblanksym:%d vblanksym:%d]",
args.head, args.watermark, args.hblanksym, args.vblanksym);
return ret;
}
int
nvif_outp_dp_drive(struct nvif_outp *outp, u8 link_nr, u8 pe[4], u8 vs[4])
{

2
drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.h
View file

@ -84,6 +84,8 @@ struct nvkm_ior_func {
void (*pattern)(struct nvkm_ior *, int pattern);
void (*drive)(struct nvkm_ior *, int ln, int pc,
int dc, int pe, int tx_pu);
int (*sst)(struct nvkm_ior *, int head, bool ef,
u32 watermark, u32 hblanksym, u32 vblanksym);
void (*vcpi)(struct nvkm_ior *, int head, u8 slot,
u8 slot_nr, u16 pbn, u16 aligned);
void (*audio)(struct nvkm_ior *, int head, bool enable);

21
drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c
View file

@ -45,6 +45,26 @@ nvkm_uoutp_mthd_dp_mst_vcpi(struct nvkm_outp *outp, void *argv, u32 argc)
return 0;
}
static int
nvkm_uoutp_mthd_dp_sst(struct nvkm_outp *outp, void *argv, u32 argc)
{
union nvif_outp_dp_sst_args *args = argv;
struct nvkm_disp *disp = outp->disp;
struct nvkm_ior *ior = outp->ior;
if (argc != sizeof(args->v0) || args->v0.version != 0)
return -ENOSYS;
if (!ior->func->dp || !nvkm_head_find(disp, args->v0.head))
return -EINVAL;
if (!ior->func->dp->sst)
return 0;
return ior->func->dp->sst(ior, args->v0.head,
outp->dp.dpcd[DPCD_RC02] & DPCD_RC02_ENHANCED_FRAME_CAP,
args->v0.watermark, args->v0.hblanksym, args->v0.vblanksym);
}
static int
nvkm_uoutp_mthd_dp_drive(struct nvkm_outp *outp, void *argv, u32 argc)
{
@ -461,6 +481,7 @@ nvkm_uoutp_mthd_acquired(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc)
case NVIF_OUTP_V0_HDA_ELD : return nvkm_uoutp_mthd_hda_eld (outp, argv, argc);
case NVIF_OUTP_V0_DP_TRAIN : return nvkm_uoutp_mthd_dp_train (outp, argv, argc);
case NVIF_OUTP_V0_DP_DRIVE : return nvkm_uoutp_mthd_dp_drive (outp, argv, argc);
case NVIF_OUTP_V0_DP_SST : return nvkm_uoutp_mthd_dp_sst (outp, argv, argc);
case NVIF_OUTP_V0_DP_MST_VCPI : return nvkm_uoutp_mthd_dp_mst_vcpi (outp, argv, argc);
default:
break;