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drm/nouveau: fix dual-link displays when plugged into single-link outputs 

When selecting the native mode for a display we weren't taking into account
whether or not it was actually supported on that particular output.

This patch modifies our native mode selection to run all modes through
mode_valid() first.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-05-28 10:13:16 +10:00
parent 2c58077541
commit 26099a7480
1 changed files with 17 additions and 14 deletions
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31
drivers/gpu/drm/nouveau/nouveau_connector.c
View File

@ -431,24 +431,27 @@ nouveau_connector_set_property(struct drm_connector *connector,
}
static struct drm_display_mode *
nouveau_connector_native_mode(struct nouveau_connector *connector)
nouveau_connector_native_mode(struct drm_connector *connector)
{
struct drm_device *dev = connector->base.dev;
struct drm_connector_helper_funcs *helper = connector->helper_private;
struct nouveau_connector *nv_connector = nouveau_connector(connector);
struct drm_device *dev = connector->dev;
struct drm_display_mode *mode, *largest = NULL;
int high_w = 0, high_h = 0, high_v = 0;
/* Use preferred mode if there is one.. */
list_for_each_entry(mode, &connector->base.probed_modes, head) {
list_for_each_entry(mode, &nv_connector->base.probed_modes, head) {
if (helper->mode_valid(connector, mode) != MODE_OK)
continue;
/* Use preferred mode if there is one.. */
if (mode->type & DRM_MODE_TYPE_PREFERRED) {
NV_DEBUG_KMS(dev, "native mode from preferred\n");
return drm_mode_duplicate(dev, mode);
}
}
/* Otherwise, take the resolution with the largest width, then height,
* then vertical refresh
*/
list_for_each_entry(mode, &connector->base.probed_modes, head) {
/* Otherwise, take the resolution with the largest width, then
* height, then vertical refresh
*/
if (mode->hdisplay < high_w)
continue;
@ -552,7 +555,7 @@ nouveau_connector_get_modes(struct drm_connector *connector)
*/
if (!nv_connector->native_mode)
nv_connector->native_mode =
nouveau_connector_native_mode(nv_connector);
nouveau_connector_native_mode(connector);
if (ret == 0 && nv_connector->native_mode) {
struct drm_display_mode *mode;
@ -583,9 +586,9 @@ nouveau_connector_mode_valid(struct drm_connector *connector,
switch (nv_encoder->dcb->type) {
case OUTPUT_LVDS:
BUG_ON(!nv_connector->native_mode);
if (mode->hdisplay > nv_connector->native_mode->hdisplay ||
mode->vdisplay > nv_connector->native_mode->vdisplay)
if (nv_connector->native_mode &&
(mode->hdisplay > nv_connector->native_mode->hdisplay ||
mode->vdisplay > nv_connector->native_mode->vdisplay))
return MODE_PANEL;
min_clock = 0;
@ -727,7 +730,7 @@ nouveau_connector_create_lvds(struct drm_device *dev,
if (ret == 0)
goto out;
nv_connector->detected_encoder = nv_encoder;
nv_connector->native_mode = nouveau_connector_native_mode(nv_connector);
nv_connector->native_mode = nouveau_connector_native_mode(connector);
list_for_each_entry_safe(mode, temp, &connector->probed_modes, head)
drm_mode_remove(connector, mode);