On Mon, Jul 26, 2021 at 07:49:06AM +0000, Simon Ser wrote:
> We already have logging for ADDFB2. Add some logging for RMFB as
> well.
>
> This can be handy when trying to find out why a CRTC gets magically
> disabled.
>
> v2: make log message more explicit, add log messages to
> drm_framebuffer_remove (Daniel)
>
> Signed-off-by: Simon Ser <contact@xxxxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> ---
> drivers/gpu/drm/drm_framebuffer.c | 22 +++++++++++++++++++++-
> 1 file changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
> index 4d01464b6f95..d3d09aba9833 100644
> --- a/drivers/gpu/drm/drm_framebuffer.c
> +++ b/drivers/gpu/drm/drm_framebuffer.c
> @@ -404,6 +404,9 @@ static void drm_mode_rmfb_work_fn(struct work_struct *w)
> struct drm_framebuffer *fb =
> list_first_entry(&arg->fbs, typeof(*fb), filp_head);
>
> + drm_dbg_kms(fb->dev,
> + "Removing [FB:%d] from all active usage due to RMFB ioctl\n",
> + fb->base.id);
> list_del_init(&fb->filp_head);
> drm_framebuffer_remove(fb);
> }
> @@ -981,6 +984,10 @@ static int atomic_remove_fb(struct drm_framebuffer *fb)
> if (plane->state->fb != fb)
> continue;
>
> + drm_dbg_kms(dev,
> + "Disabling [PLANE:%d:%s] because [FB:%d] is removed\n",
> + plane->base.id, plane->name, fb->base.id);
> +
> plane_state = drm_atomic_get_plane_state(state, plane);
> if (IS_ERR(plane_state)) {
> ret = PTR_ERR(plane_state);
> @@ -990,6 +997,11 @@ static int atomic_remove_fb(struct drm_framebuffer *fb)
> if (disable_crtcs && plane_state->crtc->primary == plane) {
> struct drm_crtc_state *crtc_state;
>
> + drm_dbg_kms(dev,
> + "Disabling [CRTC:%d:%s] because [FB:%d] is removed\n",
> + plane_state->crtc->base.id,
> + plane_state->crtc->name, fb->base.id);
> +
> crtc_state = drm_atomic_get_existing_crtc_state(state, plane_state->crtc);
>
> ret = drm_atomic_add_affected_connectors(state, plane_state->crtc);
> @@ -1052,6 +1064,10 @@ static void legacy_remove_fb(struct drm_framebuffer *fb)
> /* remove from any CRTC */
> drm_for_each_crtc(crtc, dev) {
> if (crtc->primary->fb == fb) {
> + drm_dbg_kms(dev,
> + "Disabling [CRTC:%d:%s] because [FB:%d] is removed\n",
> + crtc->base.id, crtc->name, fb->base.id);
> +
> /* should turn off the crtc */
> if (drm_crtc_force_disable(crtc))
> DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
> @@ -1059,8 +1075,12 @@ static void legacy_remove_fb(struct drm_framebuffer *fb)
> }
>
> drm_for_each_plane(plane, dev) {
> - if (plane->fb == fb)
> + if (plane->fb == fb) {
> + drm_dbg_kms(dev,
> + "Disabling [PLANE:%d:%s] because [FB:%d] is removed\n",
> + plane->base.id, plane->name, fb->base.id);
> drm_plane_force_disable(plane);
> + }
> }
> drm_modeset_unlock_all(dev);
> }
> --
> 2.32.0
>
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
