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drm/nouveau: Reject modes exceeding the integrated TMDS maximum bandwidth. 

Reported-by: Grzesiek Sójka <pld@pfu.pl>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-10-02 16:00:35 +02:00 committed by Ben Skeggs
parent 907af60b93
commit 1f5bd44354
1 changed files with 21 additions and 6 deletions
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27
drivers/gpu/drm/nouveau/nouveau_connector.c
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@ -641,11 +641,28 @@ nouveau_connector_get_modes(struct drm_connector *connector)
return ret;
}
static unsigned
get_tmds_link_bandwidth(struct drm_connector *connector)
{
struct nouveau_connector *nv_connector = nouveau_connector(connector);
struct drm_nouveau_private *dev_priv = connector->dev->dev_private;
struct dcb_entry *dcb = nv_connector->detected_encoder->dcb;
if (dcb->location != DCB_LOC_ON_CHIP ||
dev_priv->chipset >= 0x46)
return 165000;
else if (dev_priv->chipset >= 0x40)
return 155000;
else if (dev_priv->chipset >= 0x18)
return 135000;
else
return 112000;
}
static int
nouveau_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
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 drm_encoder *encoder = to_drm_encoder(nv_encoder);
@ -663,11 +680,9 @@ nouveau_connector_mode_valid(struct drm_connector *connector,
max_clock = 400000;
break;
case OUTPUT_TMDS:
if ((dev_priv->card_type >= NV_50 && !nouveau_duallink) ||
!nv_encoder->dcb->duallink_possible)
max_clock = 165000;
else
max_clock = 330000;
max_clock = get_tmds_link_bandwidth(connector);
if (nouveau_duallink && nv_encoder->dcb->duallink_possible)
max_clock *= 2;
break;
case OUTPUT_ANALOG:
max_clock = nv_encoder->dcb->crtconf.maxfreq;