diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv04_dac.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv04_dac.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/nv04_dac.c b/drivers/gpu/drm/nouveau/nv04_dac.c index bcc8090adb23..2d0fee5f09ce 100644 --- a/drivers/gpu/drm/nouveau/nv04_dac.c +++ b/drivers/gpu/drm/nouveau/nv04_dac.c @@ -314,9 +314,12 @@ nv17_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector) { struct drm_device *dev = encoder->dev; struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb; - uint32_t sample = nv17_dac_sample_load(encoder); - if (sample & NV_PRAMDAC_TEST_CONTROL_SENSEB_ALLHI) { + if (nv04_dac_in_use(encoder)) + return connector_status_disconnected; + + if (nv17_dac_sample_load(encoder) & + NV_PRAMDAC_TEST_CONTROL_SENSEB_ALLHI) { NV_INFO(dev, "Load detected on output %c\n", '@' + ffs(dcb->or)); return connector_status_connected; @@ -329,6 +332,9 @@ static bool nv04_dac_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { + if (nv04_dac_in_use(encoder)) + return false; + return true; } @@ -427,6 +433,17 @@ void nv04_dac_update_dacclk(struct drm_encoder *encoder, bool enable) } } +/* Check if the DAC corresponding to 'encoder' is being used by + * someone else. */ +bool nv04_dac_in_use(struct drm_encoder *encoder) +{ + struct drm_nouveau_private *dev_priv = encoder->dev->dev_private; + struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb; + + return nv_gf4_disp_arch(encoder->dev) && + (dev_priv->dac_users[ffs(dcb->or) - 1] & ~(1 << dcb->index)); +} + static void nv04_dac_dpms(struct drm_encoder *encoder, int mode) { struct drm_device *dev = encoder->dev; |