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drm/kms: load fbcon from drm_kms_helper

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Kconfig says fbcon is required by drm_kms_helper.  If radeon, fbcon,
and drm_kms_helper are all modules, radeon is auto loaded (by PCI id?),
drm_kms_helper is loaded because of the module dependency, but fbcon
isn't loaded leaving the console unusable.  Since fbcon is required
and there isn't an explicit module dependency, request the module
to be loaded from drm_kms_helper.

Signed-off-by: David Fries <david@fries.net>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
David Fries 2010-12-12 12:39:22 -06:00 committed by Dave Airlie
parent 7d6aa80c35
commit 3ce0516890
1 changed files with 21 additions and 0 deletions
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21
drivers/gpu/drm/drm_fb_helper.c
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@ -1533,3 +1533,24 @@ bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
}
EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
/* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EMBEDDED)
* but the module doesn't depend on any fb console symbols. At least
* attempt to load fbcon to avoid leaving the system without a usable console.
*/
#if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EMBEDDED)
static int __init drm_fb_helper_modinit(void)
{
const char *name = "fbcon";
struct module *fbcon;
mutex_lock(&module_mutex);
fbcon = find_module(name);
mutex_unlock(&module_mutex);
if (!fbcon)
request_module_nowait(name);
return 0;
}
module_init(drm_fb_helper_modinit);
#endif