From 6feb34178bbe37d292ac6deccba4db72591f506b Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Sat, 5 Nov 2016 10:52:01 -0400 Subject: [PATCH] drm: don't override possible_crtcs for primary/cursor planes It is kind of a pointless restriction. If userspace does silly things like using crtcA's cursor plane on crtcB, and then setcursor on crtcA, it will end up with the overlay disabled on crtcB. But userspace is allowed to shoot itself like this. v2: don't WARN_ON() if caller did not set ->possible_crtcs. This keeps the existing behavior by default, if caller does not set the ->possible_crtcs. Signed-off-by: Rob Clark Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1478357521-26542-1-git-send-email-robdclark@gmail.com --- drivers/gpu/drm/drm_crtc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 13441e21117c1..ce274edb9e525 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -229,9 +229,9 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, crtc->primary = primary; crtc->cursor = cursor; - if (primary) + if (primary && !primary->possible_crtcs) primary->possible_crtcs = 1 << drm_crtc_index(crtc); - if (cursor) + if (cursor && !cursor->possible_crtcs) cursor->possible_crtcs = 1 << drm_crtc_index(crtc); ret = drm_crtc_crc_init(crtc); -- 2.39.5