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drm/nv04-nv40: Fall back to panel rescaling if we have no usable native mode. 

This allows the user to set a mode larger than the native one, useful
if we had trouble finding the actual native mode (e.g. because it goes
above the hardware bandwidth limits).

Reported-by: Grzesiek Sójka <pld@pfu.pl>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
hifive-unleashed-5.1
Francisco Jerez 2010-10-10 05:21:59 +02:00 committed by Ben Skeggs
parent 1f5bd44354
commit 327ceae664
1 changed files with 7 additions and 6 deletions
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13
drivers/gpu/drm/nouveau/nv04_dfp.c
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@ -185,14 +185,15 @@ static bool nv04_dfp_mode_fixup(struct drm_encoder *encoder,
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct nouveau_connector *nv_connector = nouveau_encoder_connector_get(nv_encoder);
/* For internal panels and gpu scaling on DVI we need the native mode */
if (nv_connector->scaling_mode != DRM_MODE_SCALE_NONE) {
if (!nv_connector->native_mode)
return false;
if (!nv_connector->native_mode ||
nv_connector->scaling_mode == DRM_MODE_SCALE_NONE ||
mode->hdisplay > nv_connector->native_mode->hdisplay ||
mode->vdisplay > nv_connector->native_mode->vdisplay) {
nv_encoder->mode = *adjusted_mode;
} else {
nv_encoder->mode = *nv_connector->native_mode;
adjusted_mode->clock = nv_connector->native_mode->clock;
} else {
nv_encoder->mode = *adjusted_mode;
}
return true;