[PATCH 1/3] drm/nouveau/tegra: Skip manual unpowergating when not necessary

[Mikko Perttunen]

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 at nvidia.com>
---
 drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index 6474bd2a6d07..3d42cdbbe9c0 100644
--- 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);
-- 
2.13.0