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drm/v3d: Reach the GMP through the hub registers on V3D 7.x

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v3d_idle_axi() drains the GPU's memory interface for a safe powerdown by
using the V3D_GMP_CFG register. It reached both registers with the macros
V3D_CORE_READ and V3D_CORE_WRITE.

On V3D 7.x the GMP is no longer a per-core block; it lives in the hub
register region. Reaching it through the per-core register block addresses
the wrong region.

Select the hub accessors (V3D_{READ,WRITE}) for the GMP on V3D 7.x and
keep the per-core path for earlier generations.

Cc: stable@vger.kernel.org
Fixes: 0ad5bc1ce4 ("drm/v3d: fix up register addresses for V3D 7.x")
Link: https://patch.msgid.link/20260718-v3d-pm-axi-transactions-v1-1-4ecd7729ed70@igalia.com
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
This commit is contained in:
Maíra Canal 2026-07-18 10:44:36 -03:00
parent 7a6004c230
commit f7df2da0d1
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GPG Key ID: 3FF30E8A7688FAAA
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/v3d/v3d_gem.c
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@ -39,6 +39,18 @@ v3d_init_core(struct v3d_dev *v3d, int core)
static void
v3d_idle_axi(struct v3d_dev *v3d, int core)
{
if (v3d->ver >= V3D_GEN_71) {
V3D_WRITE(V3D_GMP_CFG(v3d->ver), V3D_GMP_CFG_STOP_REQ);
if (wait_for((V3D_READ(V3D_GMP_STATUS(v3d->ver)) &
(V3D_GMP_STATUS_RD_COUNT_MASK |
V3D_GMP_STATUS_WR_COUNT_MASK |
V3D_GMP_STATUS_CFG_BUSY)) == 0, 100)) {
drm_err(&v3d->drm, "Failed to wait for safe GMP shutdown\n");
}
return;
}
V3D_CORE_WRITE(core, V3D_GMP_CFG(v3d->ver), V3D_GMP_CFG_STOP_REQ);
if (wait_for((V3D_CORE_READ(core, V3D_GMP_STATUS(v3d->ver)) &