diff options
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_connector.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 5e830a585538..fc42ea8503cb 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -644,6 +644,46 @@ nouveau_connector_scaler_modes_add(struct drm_connector *connector) return modes; } +static void +nouveau_connector_detect_depth(struct drm_connector *connector) +{ + struct drm_nouveau_private *dev_priv = connector->dev->dev_private; + struct nouveau_connector *nv_connector = nouveau_connector(connector); + struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder; + struct nvbios *bios = &dev_priv->vbios; + struct drm_display_mode *mode = nv_connector->native_mode; + bool duallink; + + /* if the edid is feeling nice enough to provide this info, use it */ + if (nv_connector->edid && connector->display_info.bpc) + return; + + /* if not, we're out of options unless we're LVDS, default to 6bpc */ + connector->display_info.bpc = 6; + if (nv_encoder->dcb->type != OUTPUT_LVDS) + return; + + /* LVDS: panel straps */ + if (bios->fp_no_ddc) { + if (bios->fp.if_is_24bit) + connector->display_info.bpc = 8; + return; + } + + /* LVDS: DDC panel, need to first determine the number of links to + * know which if_is_24bit flag to check... + */ + if (nv_connector->edid && + nv_connector->dcb->type == DCB_CONNECTOR_LVDS_SPWG) + duallink = ((u8 *)nv_connector->edid)[121] == 2; + else + duallink = mode->clock >= bios->fp.duallink_transition_clk; + + if ((!duallink && (bios->fp.strapless_is_24bit & 1)) || + ( duallink && (bios->fp.strapless_is_24bit & 2))) + connector->display_info.bpc = 8; +} + static int nouveau_connector_get_modes(struct drm_connector *connector) { @@ -688,6 +728,12 @@ nouveau_connector_get_modes(struct drm_connector *connector) ret = 1; } + /* Attempt to determine display colour depth, this has to happen after + * we've determined the "native" mode for LVDS, as the VBIOS tables + * require us to compare against a pixel clock in some cases.. + */ + nouveau_connector_detect_depth(connector); + if (nv_encoder->dcb->type == OUTPUT_TV) ret = get_slave_funcs(encoder)->get_modes(encoder, connector); |