drm/nouveau: support init table i2c device identifier 0x81

It appears to be meant to reference the second "default index".

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index b0b98d7f4ea9..327f6f34d78d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -810,6 +810,9 @@ init_i2c_device_find(struct drm_device *dev, int i2c_index)
         }
         if (i2c_index == 0x80)  /* g80+ */
                 i2c_index = dcb->i2c_default_indices & 0xf;
+        else
+        if (i2c_index == 0x81)
+                i2c_index = (dcb->i2c_default_indices & 0xf0) >> 4;
 
         if (i2c_index > DCB_MAX_NUM_I2C_ENTRIES) {
                 NV_ERROR(dev, "invalid i2c_index 0x%x\n", i2c_index);