[Nouveau] [Bug 60704] [nouveau, git regression] - I2C PWM fan control broken on nv50 adt7475 on kernels 3.3.x+

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60704

--- Comment #13 from Marc Meledandri <m.meledandri at gmail.com> ---
FWIW, on kernel series 3.10.x, adjusting the i2c datarate still provides a
working solution on my nv50 hardware. Sensors detect properly and fan control
is enabled. The necessary patch has changed again:

--- a/drivers/gpu/drm/nouveau/core/subdev/i2cbase.c    2013-07-25
18:16:45.000000000 -0400
+++ b/drivers/gpu/drm/nouveau/core/subdev/i2cbase.c.patched    2013-07-29
19:26:09.393689862 -0400
@@ -122,7 +122,7 @@
         if (!bit)
             return -ENOMEM;

-        bit->udelay = 10;
+        bit->udelay = 20;
         bit->timeout = usecs_to_jiffies(2200);
         bit->data = port;
         bit->pre_xfer = nouveau_i2c_pre_xfer;

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