drm/nv04-nv40: Prevent invalid DAC/TVDAC combinations.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv17_tv.c b/drivers/gpu/drm/nouveau/nv17_tv.c
index 44437ff46394..864867ed951a 100644
--- a/drivers/gpu/drm/nouveau/nv17_tv.c
+++ b/drivers/gpu/drm/nouveau/nv17_tv.c
@@ -125,6 +125,9 @@ nv17_tv_detect(struct drm_encoder *encoder, struct drm_connector *connector)
         struct nv17_tv_encoder *tv_enc = to_tv_enc(encoder);
         struct dcb_entry *dcb = tv_enc->base.dcb;
 
+        if (nv04_dac_in_use(encoder))
+                return connector_status_disconnected;
+
         if (dev_priv->chipset == 0x42 ||
             dev_priv->chipset == 0x43)
                 tv_enc->pin_mask = nv42_tv_sample_load(encoder) >> 28 & 0xe;
@@ -296,6 +299,9 @@ static bool nv17_tv_mode_fixup(struct drm_encoder *encoder,
 {
         struct nv17_tv_norm_params *tv_norm = get_tv_norm(encoder);
 
+        if (nv04_dac_in_use(encoder))
+                return false;
+
         if (tv_norm->kind == CTV_ENC_MODE)
                 adjusted_mode->clock = tv_norm->ctv_enc_mode.mode.clock;
         else