diff mbox series

[v7,3/3] drm/i915/fbdev: do not create fbdev if HPD is suspended

Message ID 20220826141929.189681-4-andrzej.hajda@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915/display: stop HPD workers before display driver unregister | expand

Commit Message

Andrzej Hajda Aug. 26, 2022, 2:19 p.m. UTC 
In case of deferred FB setup core can try to create new
framebuffer. Disallow it if hpd_suspended flag is set.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbdev.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 2903b9cfa0f834..f287362dbdc68a 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -210,6 +210,12 @@  static int intelfb_create(struct drm_fb_helper *helper,
 	struct drm_i915_gem_object *obj;
 	int ret;
 
+	mutex_lock(&ifbdev->hpd_lock);
+	ret = ifbdev->hpd_suspended ? -EAGAIN : 0;
+	mutex_unlock(&ifbdev->hpd_lock);
+	if (ret)
+		return ret;
+
 	if (intel_fb &&
 	    (sizes->fb_width > intel_fb->base.width ||
 	     sizes->fb_height > intel_fb->base.height)) {