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authorMartin Peres <martin.peres@labri.fr>2013-03-05 10:35:20 +0100
committerBen Skeggs <bskeggs@redhat.com>2013-03-18 11:15:26 +1000
commiteea4eb14a0f74f806e7a458f174f880744a68bdd (patch)
tree4f72a66b5c44493c39483be1592ad11ce338bafc /drivers/gpu
parent7ae9712c60698ae2870fd115cb3ef4449a615509 (diff)
downloadop-kernel-dev-eea4eb14a0f74f806e7a458f174f880744a68bdd.zip
op-kernel-dev-eea4eb14a0f74f806e7a458f174f880744a68bdd.tar.gz
drm/nv40/therm: increase the sensor's settling delay to 20ms
Based on my experience, 10ms wasn't always enough. Let's bump that to a little more. If this turns out to be insufficient-enough again, then an approach based on letting the sensor settle for several seconds before starting polling on the temperature would be better suited. This way, boot time wouldn't be impacted by those waits too much. Signed-off-by: Martin Peres <martin.peres@labri.fr> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c b/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c
index d8f4325..0575af5 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/therm/nv40.c
@@ -66,10 +66,11 @@ nv40_sensor_setup(struct nouveau_therm *therm)
if (style == NEW_STYLE) {
nv_mask(therm, 0x15b8, 0x80000000, 0);
nv_wr32(therm, 0x15b0, 0x80003fff);
- mdelay(10); /* wait for the temperature to stabilize */
+ mdelay(20); /* wait for the temperature to stabilize */
return nv_rd32(therm, 0x15b4) & 0x3fff;
} else if (style == OLD_STYLE) {
nv_wr32(therm, 0x15b0, 0xff);
+ mdelay(20); /* wait for the temperature to stabilize */
return nv_rd32(therm, 0x15b4) & 0xff;
} else
return -ENODEV;
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