[Mesa-dev] [PATCH] nvc0: disable linked tsc mode in compute launch descriptor

[Samuel Pitoiset]

Does this fix all dEQP compute sampler fails?

On 02/13/2017 05:27 PM, Ilia Mirkin wrote:
> Empirically, this makes things work. Presumably this was originally
> copied from the blob, which does make use of linked tsc mode.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99532
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> Cc: mesa-stable at lists.freedesktop.org
> ---
>  src/gallium/drivers/nouveau/nvc0/nve4_compute.c | 1 +
>  src/gallium/drivers/nouveau/nvc0/nve4_compute.h | 7 +++++--
>  2 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/src/gallium/drivers/nouveau/nvc0/nve4_compute.c b/src/gallium/drivers/nouveau/nvc0/nve4_compute.c
> index f927aa0..db32c9b 100644
> --- a/src/gallium/drivers/nouveau/nvc0/nve4_compute.c
> +++ b/src/gallium/drivers/nouveau/nvc0/nve4_compute.c
> @@ -827,6 +827,7 @@ nve4_compute_dump_launch_desc(const struct nve4_cp_launch_desc *desc)
>     debug_printf("barrier count: %u\n", desc->bar_alloc);
>     debug_printf("$r count: %u\n", desc->gpr_alloc);
>     debug_printf("cache split: %s\n", nve4_cache_split_name(desc->cache_split));
> +   debug_printf("linked tsc: %d\n", desc->linked_tsc);
>
>     for (i = 0; i < 8; ++i) {
>        uint64_t address;
> diff --git a/src/gallium/drivers/nouveau/nvc0/nve4_compute.h b/src/gallium/drivers/nouveau/nvc0/nve4_compute.h
> index b98c65d..5fe58b9 100644
> --- a/src/gallium/drivers/nouveau/nvc0/nve4_compute.h
> +++ b/src/gallium/drivers/nouveau/nvc0/nve4_compute.h
> @@ -8,7 +8,10 @@ struct nve4_cp_launch_desc
>  {
>     u32 unk0[8];
>     u32 entry;
> -   u32 unk9[3];
> +   u32 unk9[2];
> +   u32 unk11_0      : 30;
> +   u32 linked_tsc   : 1;
> +   u32 unk11_31     : 1;
>     u32 griddim_x    : 31;
>     u32 unk12        : 1;
>     u16 griddim_y;
> @@ -48,7 +51,7 @@ nve4_cp_launch_desc_init_default(struct nve4_cp_launch_desc *desc)
>     memset(desc, 0, sizeof(*desc));
>
>     desc->unk0[7]  = 0xbc000000;
> -   desc->unk9[2]  = 0x44014000;
> +   desc->unk11_0  = 0x04014000;
>     desc->unk47_20 = 0x300;
>  }
>
>