diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2011-07-08 11:14:50 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2011-09-20 16:07:22 +1000 |
| commit | b681993f7a48b847f3129abd8e8b3926c108a0d9 (patch) | |
| tree | 698aad78e3db4fb95431dc179de45b7211174bae /drivers/gpu/drm/nouveau/nvd0_display.c | |
| parent | 629c1b9207386b00abd6453b72a19b15cd2202f8 (diff) | |
drm/nvd0/disp: dac load detect
VBIOS does more than this, as does nv50/nvc0 driver in nouveau. Traces
of the NVIDIA binary driver however, show pretty much just this being
done... Seems to work for me, it'll be fine for the moment.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvd0_display.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvd0_display.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nvd0_display.c b/drivers/gpu/drm/nouveau/nvd0_display.c index 6720d63cfcc..f4788d819ed 100644 --- a/drivers/gpu/drm/nouveau/nvd0_display.c +++ b/drivers/gpu/drm/nouveau/nvd0_display.c @@ -685,7 +685,22 @@ nvd0_dac_disconnect(struct drm_encoder *encoder) static enum drm_connector_status nvd0_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector) { - return connector_status_disconnected; + enum drm_connector_status status = connector_status_disconnected; + struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder); + struct drm_device *dev = encoder->dev; + int or = nv_encoder->or; + u32 load; + + nv_wr32(dev, 0x61a00c + (or * 0x800), 0x00100000); + udelay(9500); + nv_wr32(dev, 0x61a00c + (or * 0x800), 0x80000000); + + load = nv_rd32(dev, 0x61a00c + (or * 0x800)); + if ((load & 0x38000000) == 0x38000000) + status = connector_status_connected; + + nv_wr32(dev, 0x61a00c + (or * 0x800), 0x00000000); + return status; } static void |