From 1e70bdcbeb210afedc8f3103ff4fe295c2fa9fc1 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 28 Apr 2017 15:42:22 -0700 Subject: [PATCH] drm/vc4: Don't try to initialize FBDEV if we're only bound to V3D. 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 Reviewed-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20170428224223.21904-2-eric@anholt.net --- drivers/gpu/drm/vc4/vc4_kms.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c index ad7925a9e0ea..237a504f11f0 100644 --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -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); -- 2.20.1