drm/nouveau/tegra: Skip manual unpowergating when not necessary

On Tegra186, powergating is handled by the BPMP power domain provider
and the "legacy" powergating API is not available. Therefore skip
these calls if we are attached to a power domain.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index 6474bd2..3d42cdb 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
@@ -51,10 +51,12 @@ nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
        reset_control_assert(tdev->rst);
        udelay(10);
 
-       ret = tegra_powergate_remove_clamping(TEGRA_POWERGATE_3D);
-       if (ret)
-               goto err_clamp;
-       udelay(10);
+       if (!tdev->pdev->dev.pm_domain) {
+               ret = tegra_powergate_remove_clamping(TEGRA_POWERGATE_3D);
+               if (ret)
+                       goto err_clamp;
+               udelay(10);
+       }
 
        reset_control_deassert(tdev->rst);
        udelay(10);