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Message-Id: <20180130195024.18172-6-lyude@redhat.com>
Date: Tue, 30 Jan 2018 14:49:25 -0500
From: Lyude Paul <lyude@...hat.com>
To: nouveau@...ts.freedesktop.org
Cc: Ben Skeggs <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
Martin Peres <martin.peres@...e.fr>,
Rhys Kidd <rhyskidd@...il.com>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [RFC v5 5/5] drm/nouveau: Introduce NvPmEnableGating option
This adds the NvPmEnableGating config option to nouveau, which can be
used to enable or disable clockgating for supported chipsets. Enabling
can be done by passing
config=NvPmEnableGating=1
To nouveau. If your chipset supports it, you'll see a message in your
kernel log indicating that clockgating is enabled. Since clockgating has
only had limited testing thus far, we leave this option disabled by
default for now.
Signed-off-by: Lyude Paul <lyude@...hat.com>
Reviewed-by: Martin Peres <martin.peres@...e.fr>
---
drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c
index de07bc07abdb..bf62303571b3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c
@@ -434,7 +434,9 @@ nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device,
therm->attr_get = nvkm_therm_attr_get;
therm->attr_set = nvkm_therm_attr_set;
therm->mode = therm->suspend = -1; /* undefined */
- therm->clkgating_enabled = false;
+
+ therm->clkgating_enabled = nvkm_boolopt(device->cfgopt,
+ "NvPmEnableGating", false);
}
int
--
2.14.3
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