[PATCH] drm/ast: Don't check new mode if CRTC is being disabled

Suspending failed because there's no mode if the CRTC is being disabled. Early-out in this case. This fixes runtime PM for ast.

Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/ast/ast_mode.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c index 7a9f20a2fd303..089b7d9a0cf3f 100644 --- a/drivers/gpu/drm/ast/ast_mode.c +++ b/drivers/gpu/drm/ast/ast_mode.c @@ -801,6 +801,9 @@ static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc, return -EINVAL; }

+ if (!state->enable) + return 0; /* no checks required if CRTC is being disabled */ + ast_state = to_ast_crtc_state(state);

format = ast_state->format;