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drm: Do not force 1024x768 modes on unknown connectors

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Only fallback to a set of default modes on a connector iff that
connector is known to be connected. The issue occurs that with limited
hardware which cannot probe a connector and so reports the
connector status as unknown will then attempt to retrieve the modes for
it during drm_helper_probe_single_connector_modes(). Should that fail,
the helper then generates a default set which fools the fb_helper and
causes havoc with the console and beyond.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Chris Wilson 2010-09-05 16:55:25 +01:00 committed by Dave Airlie
parent e58f637bb9
commit c7ef35a960
1 changed files with 3 additions and 4 deletions
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7
drivers/gpu/drm/drm_crtc_helper.c
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@ -115,11 +115,10 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
}
count = (*connector_funcs->get_modes)(connector);
if (!count) {
if (count == 0 && connector->status == connector_status_connected)
count = drm_add_modes_noedid(connector, 1024, 768);
if (!count)
return 0;
}
if (count == 0)
goto prune;
drm_mode_connector_list_update(connector);