diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2019-05-29 09:58:18 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2019-07-19 16:26:50 +1000 |
| commit | d1084184789d677df4e9c110f38cb3f3d709195d (patch) | |
| tree | fdb43ec0d11b0ea98953e39480bf3fd8164a4143 /drivers | |
| parent | 533f4752407543f488a9118d817b8c504352b6fb (diff) | |
| download | lwn-d1084184789d677df4e9c110f38cb3f3d709195d.tar.gz lwn-d1084184789d677df4e9c110f38cb3f3d709195d.zip | |
drm/nouveau/kms: disallow dual-link harder if hdmi connection detected
The fallthrough cases (pre-Fermi) would accidentally allow dual-link pixel
clocks even where they shouldn't be. This leads to a high resolution HDMI
displays, connected via a DVI->HDMI adapter, to fail on the original NV50.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_connector.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 4116ee62adaf..caa8c7595889 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -978,11 +978,13 @@ get_tmds_link_bandwidth(struct drm_connector *connector) struct nouveau_drm *drm = nouveau_drm(connector->dev); struct dcb_output *dcb = nv_connector->detected_encoder->dcb; struct drm_display_info *info = NULL; - const unsigned duallink_scale = + unsigned duallink_scale = nouveau_duallink && nv_encoder->dcb->duallink_possible ? 2 : 1; - if (drm_detect_hdmi_monitor(nv_connector->edid)) + if (drm_detect_hdmi_monitor(nv_connector->edid)) { info = &nv_connector->base.display_info; + duallink_scale = 1; + } if (info) { if (nouveau_hdmimhz > 0) @@ -1003,6 +1005,7 @@ get_tmds_link_bandwidth(struct drm_connector *connector) if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_FERMI) return 225000; } + if (dcb->location != DCB_LOC_ON_CHIP || drm->client.device.info.chipset >= 0x46) return 165000 * duallink_scale; |