Karol Herbst
2022-Feb-05 15:27 UTC
[Nouveau] [PATCH] Revert "drm/nouveau/pmu/gm200-: avoid touching PMU outside of DEVINIT/PREOS/ACR"
This reverts commit 1d2271d2fb85e54bfc9630a6c30ac0feb9ffb983.
This fix actually causes regressions, which I could verify on my systems
as well. So let's revert it and figure out a proper fix for the original
problem.
Cc: Ben Skeggs <bskeggs at redhat.com>
Bug: https://gitlab.freedesktop.org/drm/nouveau/-/issues/149
Signed-off-by: Karol Herbst <kherbst at redhat.com>
---
.../gpu/drm/nouveau/nvkm/subdev/pmu/base.c | 37 ++++++++-----------
1 file changed, 16 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c
b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c
index 455e95a89259..24382875fb4f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c
@@ -94,13 +94,20 @@ nvkm_pmu_fini(struct nvkm_subdev *subdev, bool suspend)
return 0;
}
-static void
+static int
nvkm_pmu_reset(struct nvkm_pmu *pmu)
{
struct nvkm_device *device = pmu->subdev.device;
if (!pmu->func->enabled(pmu))
- return;
+ return 0;
+
+ /* Inhibit interrupts, and wait for idle. */
+ nvkm_wr32(device, 0x10a014, 0x0000ffff);
+ nvkm_msec(device, 2000,
+ if (!nvkm_rd32(device, 0x10a04c))
+ break;
+ );
/* Reset. */
if (pmu->func->reset)
@@ -111,37 +118,25 @@ nvkm_pmu_reset(struct nvkm_pmu *pmu)
if (!(nvkm_rd32(device, 0x10a10c) & 0x00000006))
break;
);
+
+ return 0;
}
static int
nvkm_pmu_preinit(struct nvkm_subdev *subdev)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
- nvkm_pmu_reset(pmu);
- return 0;
+ return nvkm_pmu_reset(pmu);
}
static int
nvkm_pmu_init(struct nvkm_subdev *subdev)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
- struct nvkm_device *device = pmu->subdev.device;
-
- if (!pmu->func->init)
- return 0;
-
- if (pmu->func->enabled(pmu)) {
- /* Inhibit interrupts, and wait for idle. */
- nvkm_wr32(device, 0x10a014, 0x0000ffff);
- nvkm_msec(device, 2000,
- if (!nvkm_rd32(device, 0x10a04c))
- break;
- );
-
- nvkm_pmu_reset(pmu);
- }
-
- return pmu->func->init(pmu);
+ int ret = nvkm_pmu_reset(pmu);
+ if (ret == 0 && pmu->func->init)
+ ret = pmu->func->init(pmu);
+ return ret;
}
static void *
--
2.34.1