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| author | Ben Skeggs <bskeggs@redhat.com> | 2010-09-28 10:23:20 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-10-05 09:58:03 +1000 |
| commit | 62acdc71cfbc816b26a57d89f433f8afaf4ff78d (patch) | |
| tree | 90c99f53efb6b2d9060e62ac1ede1fb5366c6224 /drivers/gpu/drm | |
| parent | 85341f27b49833325f97580edcd687b4d90bb30b (diff) | |
| download | linux-62acdc71cfbc816b26a57d89f433f8afaf4ff78d.tar.gz linux-62acdc71cfbc816b26a57d89f433f8afaf4ff78d.tar.bz2 linux-62acdc71cfbc816b26a57d89f433f8afaf4ff78d.zip | |
drm/nouveau: fix required mode bandwidth calculation for DP
This should fix eDP on certain laptops with 18-bit panels, we were rejecting
the panel's native mode due to thinking there was insufficient bandwidth
for it.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_connector.c | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_connector.h | 3 |
2 files changed, 20 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 4b286a8c30c8..0871495096fa 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -76,6 +76,22 @@ nouveau_encoder_connector_get(struct nouveau_encoder *encoder) return NULL; } +/*TODO: This could use improvement, and learn to handle the fixed + * BIOS tables etc. It's fine currently, for its only user. + */ +int +nouveau_connector_bpp(struct drm_connector *connector) +{ + struct nouveau_connector *nv_connector = nouveau_connector(connector); + + if (nv_connector->edid && nv_connector->edid->revision >= 4) { + u8 bpc = ((nv_connector->edid->input & 0x70) >> 3) + 4; + if (bpc > 4) + return bpc; + } + + return 18; +} static void nouveau_connector_destroy(struct drm_connector *drm_connector) @@ -666,7 +682,7 @@ nouveau_connector_mode_valid(struct drm_connector *connector, else max_clock = nv_encoder->dp.link_nr * 162000; - clock *= 3; + clock = clock * nouveau_connector_bpp(connector) / 8; break; default: BUG_ON(1); diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.h b/drivers/gpu/drm/nouveau/nouveau_connector.h index 0d2e668ccfe5..c21ed6b16f88 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.h +++ b/drivers/gpu/drm/nouveau/nouveau_connector.h @@ -55,4 +55,7 @@ nouveau_connector_create(struct drm_device *, int index); void nouveau_connector_set_polling(struct drm_connector *); +int +nouveau_connector_bpp(struct drm_connector *); + #endif /* __NOUVEAU_CONNECTOR_H__ */ |