On 09/20/2012 02:38 PM, Rob Clark wrote:
On Wed, Sep 19, 2012 at 9:52 PM, Joonyoung Shim <jy0922.shim@xxxxxxxxxxx> wrote:
On 09/17/2012 06:38 PM, Chris Wilson wrote:
As during the plane cleanup, we wish to disable the hardware and
so may modify state on the associated CRTC, that CRTC must continue to
exist until we are finished.
A similar issue can occur in the drm_framebuffer_cleanup(). If crtc and
plane use same framebuffer and the framebuffer is destroyed, crtc is
turned off prior to turning off plane.
I imagine my patch to add refcnt'ing to fb would help in this case..
BR,
-R
Even if the patch to add refcnt'ing to fb is applied, same issue will
occur in the drm_framebuffer_remove(). It can delay to destroy the fb,
but cannot change crtc and plane disable order.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54101
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
drivers/gpu/drm/drm_crtc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 6fbfc24..af81f77 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1034,15 +1034,15 @@ void drm_mode_config_cleanup(struct drm_device
*dev)
fb->funcs->destroy(fb);
}
- list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list,
head) {
- crtc->funcs->destroy(crtc);
- }
-
list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
head) {
plane->funcs->destroy(plane);
}
+ list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list,
head) {
+ crtc->funcs->destroy(crtc);
+ }
+
idr_remove_all(&dev->mode_config.crtc_idr);
idr_destroy(&dev->mode_config.crtc_idr);
}
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