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drm/vc4: Don't try to initialize FBDEV if we're only bound to V3D.

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There's no sense in having an fbdev if there's no display, since
connectors don't get hotplugged to this hardware.  On Cygnus we were
getting a dmesg error from passing in num_connectors (0), when that
argument is supposed to be the maximum number of cloned connectors per
CRTC (1).

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170428224223.21904-2-eric@anholt.net
This commit is contained in:
Eric Anholt 2017-04-28 15:42:22 -07:00
parent b72a2816e3
commit 1e70bdcbeb
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/vc4/vc4_kms.c
View file

@ -230,10 +230,12 @@ int vc4_kms_load(struct drm_device *dev)
drm_mode_config_reset(dev);
vc4->fbdev = drm_fbdev_cma_init(dev, 32,
dev->mode_config.num_connector);
if (IS_ERR(vc4->fbdev))
vc4->fbdev = NULL;
if (dev->mode_config.num_connector) {
vc4->fbdev = drm_fbdev_cma_init(dev, 32,
dev->mode_config.num_connector);
if (IS_ERR(vc4->fbdev))
vc4->fbdev = NULL;
}
drm_kms_helper_poll_init(dev);