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drm/nouveau: magic to make auxch on new macbooks booted in EFI mode work

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-07-19 15:59:39 +10:00
parent 2228c6fe04
commit 6b70e48167
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/nouveau/nouveau_i2c.c
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@ -286,7 +286,10 @@ nouveau_i2c_find(struct drm_device *dev, int index)
val = 0xe001;
}
nv_wr32(dev, reg, (nv_rd32(dev, reg) & ~0xf003) | val);
/* nfi, but neither auxch or i2c work if it's 1 */
nv_mask(dev, reg + 0x0c, 0x00000001, 0x00000000);
/* nfi, but switches auxch vs normal i2c */
nv_mask(dev, reg + 0x00, 0x0000f003, val);
}
if (!i2c->chan && nouveau_i2c_init(dev, i2c, index))