diff options
| author | Karol Herbst <kherbst@redhat.com> | 2022-02-28 10:12:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-02 11:34:00 +0100 |
| commit | 8a89dcfb91af2432cdcd29f6649650073b0419bc (patch) | |
| tree | 0bef281c0fafe525f1686507137362e6b376caf1 | |
| parent | 29deb5dfd66993aed8de49364db7cf7061f13ab1 (diff) | |
Revert "drm/nouveau/pmu/gm200-: avoid touching PMU outside of DEVINIT/PREOS/ACR"
This reverts commit c9ec3d85c0eef7c71cdc68db758e0f0e378132c0.
This commit causes a regression if 4cdd2450bf739bada353e82d27b00db9af8c3001
is not applied as well. This was fixed for 5.16, 5.15 and 5.10.
On older stable branches backporting this commit is complicated as relevant
code changed quite a bit. Furthermore most of the affected hardware barely
works on those and users would want to use the newer kernels anyway.
Cc: stable@vger.kernel.org # 5.4 4.19 and 4.14
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Link: https://gitlab.freedesktop.org/drm/nouveau/-/issues/149
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c | 37 |
1 files 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 8cf3d1b4662d..ce70a193caa7 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c @@ -70,13 +70,20 @@ 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) @@ -87,37 +94,25 @@ 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 int |