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drm/v3d: Fix Indirect Dispatch configuration for V3D 7.1.6 and later

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This commit is a resubmission of commit 1fe1c66274 ("drm/v3d: Fix
Indirect Dispatch configuration for V3D 7.1.6 and later"), which was
accidentally reverted by commit 91dae758bd ("Merge tag
'drm-misc-next-2024-08-01' of https://gitlab.freedesktop.org/drm/misc/kernel
into drm-next"), likely due to an unfortunate conflict resolution.

From the original commit message:

```
`args->cfg[4]` is configured in Indirect Dispatch using the number of
batches. Currently, for all V3D tech versions, `args->cfg[4]` equals the
number of batches subtracted by 1. But, for V3D 7.1.6 and later, we must not
subtract 1 from the number of batches.

Implement the fix by checking the V3D tech version and revision.

Fixes several `dEQP-VK.synchronization*` CTS tests related to Indirect Dispatch.
```

Fixes: 91dae758bd ("Merge tag 'drm-misc-next-2024-08-01' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next")
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Link: https://lore.kernel.org/r/20250409205051.9639-1-mcanal@igalia.com
This commit is contained in:
Maíra Canal
2025-04-09 17:50:06 -03:00
parent 1d34597a1e
commit dcdae6e92d
1 changed files with 13 additions and 3 deletions
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16
drivers/gpu/drm/v3d/v3d_sched.c
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@@ -428,7 +428,8 @@ v3d_rewrite_csd_job_wg_counts_from_indirect(struct v3d_cpu_job *job)
struct v3d_bo *bo = to_v3d_bo(job->base.bo[0]);
struct v3d_bo *indirect = to_v3d_bo(indirect_csd->indirect);
struct drm_v3d_submit_csd *args = &indirect_csd->job->args;
u32 *wg_counts;
struct v3d_dev *v3d = job->base.v3d;
u32 num_batches, *wg_counts;
v3d_get_bo_vaddr(bo);
v3d_get_bo_vaddr(indirect);
@@ -441,8 +442,17 @@ v3d_rewrite_csd_job_wg_counts_from_indirect(struct v3d_cpu_job *job)
args->cfg[0] = wg_counts[0] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
args->cfg[1] = wg_counts[1] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
args->cfg[2] = wg_counts[2] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
args->cfg[4] = DIV_ROUND_UP(indirect_csd->wg_size, 16) *
(wg_counts[0] * wg_counts[1] * wg_counts[2]) - 1;
num_batches = DIV_ROUND_UP(indirect_csd->wg_size, 16) *
(wg_counts[0] * wg_counts[1] * wg_counts[2]);
/* V3D 7.1.6 and later don't subtract 1 from the number of batches */
if (v3d->ver < 71 || (v3d->ver == 71 && v3d->rev < 6))
args->cfg[4] = num_batches - 1;
else
args->cfg[4] = num_batches;
WARN_ON(args->cfg[4] == ~0);
for (int i = 0; i < 3; i++) {
/* 0xffffffff indicates that the uniform rewrite is not needed */