summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/nouveau/nouveau_i2c.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_i2c.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_i2c.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_i2c.c b/drivers/gpu/drm/nouveau/nouveau_i2c.c
index 88583e7bf651..316a3c7e6eb4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_i2c.c
+++ b/drivers/gpu/drm/nouveau/nouveau_i2c.c
@@ -254,16 +254,27 @@ struct nouveau_i2c_chan *
nouveau_i2c_find(struct drm_device *dev, int index)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nvbios *bios = &dev_priv->vbios;
+ struct dcb_i2c_entry *i2c = &dev_priv->vbios.dcb.i2c[index];
if (index >= DCB_MAX_NUM_I2C_ENTRIES)
return NULL;
- if (!bios->dcb.i2c[index].chan) {
- if (nouveau_i2c_init(dev, &bios->dcb.i2c[index], index))
- return NULL;
+ if (dev_priv->chipset >= NV_50 && (i2c->entry & 0x00000100)) {
+ uint32_t reg = 0xe500, val;
+
+ if (i2c->port_type == 6) {
+ reg += i2c->read * 0x50;
+ val = 0x2002;
+ } else {
+ reg += ((i2c->entry & 0x1e00) >> 9) * 0x50;
+ val = 0xe001;
+ }
+
+ nv_wr32(dev, reg, (nv_rd32(dev, reg) & ~0xf003) | val);
}
- return bios->dcb.i2c[index].chan;
+ if (!i2c->chan && nouveau_i2c_init(dev, i2c, index))
+ return NULL;
+ return i2c->chan;
}