On Fri, Oct 5, 2018 at 12:14 PM Benjamin Gaignard
<benjamin.gaignard@xxxxxxxxxx> wrote:
>
> From: Daniel Vetter <daniel.vetter@xxxxxxxx>
>
> drm_plane_helper_disable is a non-atomic drivers only function, and
> will blow up (since no one passes the locking context it needs).
>
> Atomic drivers which want to quiescent their hw on unload should
> use drm_atomic_helper_shutdown() instead.
>
> The sti cleanup code seems supremely confused:
> - In the load error path it calls drm_mode_config_cleanup before it
> stops various kms services like poll worker or fbdev emulation.
> That's going to oops.
> - The actual unload code doesn't even bother with the cleanup and just
> leaks.
>
> Try to fix this while at it.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
>
> Complements original patch after testing on board.
I think it's better to split out your fixup and cc: stable it, since I
think you'll hit the same error also just when shutting down a CRTC at
runtime. Which is something compositors and fbcon tends to do. Then we
could put your patch into -fixes, and my cleanup (which really isn't a
fix) into -next. Sounds good?
Adding the drm_crtc_wait_one_vblank has my r-b (if it's just the
bugfix patch only).
-Daniel
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
> Cc: Vincent Abriou <vincent.abriou@xxxxxx>
> Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/sti/sti_crtc.c | 2 ++
> drivers/gpu/drm/sti/sti_cursor.c | 10 +---------
> drivers/gpu/drm/sti/sti_drv.c | 6 +++---
> drivers/gpu/drm/sti/sti_gdp.c | 10 +---------
> drivers/gpu/drm/sti/sti_hqvdp.c | 10 +---------
> drivers/gpu/drm/sti/sti_tvout.c | 24 ------------------------
> 6 files changed, 8 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/gpu/drm/sti/sti_crtc.c b/drivers/gpu/drm/sti/sti_crtc.c
> index 5824e6aca8f4..61c2379fba87 100644
> --- a/drivers/gpu/drm/sti/sti_crtc.c
> +++ b/drivers/gpu/drm/sti/sti_crtc.c
> @@ -40,6 +40,8 @@ static void sti_crtc_atomic_disable(struct drm_crtc *crtc,
> DRM_DEBUG_DRIVER("\n");
>
> mixer->status = STI_MIXER_DISABLING;
> +
> + drm_crtc_wait_one_vblank(crtc);
> }
>
> static int
> diff --git a/drivers/gpu/drm/sti/sti_cursor.c b/drivers/gpu/drm/sti/sti_cursor.c
> index 57b870e1e696..e1ba253055c7 100644
> --- a/drivers/gpu/drm/sti/sti_cursor.c
> +++ b/drivers/gpu/drm/sti/sti_cursor.c
> @@ -328,14 +328,6 @@ static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
> .atomic_disable = sti_cursor_atomic_disable,
> };
>
> -static void sti_cursor_destroy(struct drm_plane *drm_plane)
> -{
> - DRM_DEBUG_DRIVER("\n");
> -
> - drm_plane_helper_disable(drm_plane, NULL);
> - drm_plane_cleanup(drm_plane);
> -}
> -
> static int sti_cursor_late_register(struct drm_plane *drm_plane)
> {
> struct sti_plane *plane = to_sti_plane(drm_plane);
> @@ -347,7 +339,7 @@ static int sti_cursor_late_register(struct drm_plane *drm_plane)
> static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = {
> .update_plane = drm_atomic_helper_update_plane,
> .disable_plane = drm_atomic_helper_disable_plane,
> - .destroy = sti_cursor_destroy,
> + .destroy = drm_plane_cleanup,
> .reset = sti_plane_reset,
> .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
> diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
> index 6dced8abcf16..ac54e0f9caea 100644
> --- a/drivers/gpu/drm/sti/sti_drv.c
> +++ b/drivers/gpu/drm/sti/sti_drv.c
> @@ -206,6 +206,8 @@ static void sti_cleanup(struct drm_device *ddev)
> struct sti_private *private = ddev->dev_private;
>
> drm_kms_helper_poll_fini(ddev);
> + drm_atomic_helper_shutdown(ddev);
> + drm_mode_config_cleanup(ddev);
> component_unbind_all(ddev->dev, ddev);
> kfree(private);
> ddev->dev_private = NULL;
> @@ -230,7 +232,7 @@ static int sti_bind(struct device *dev)
>
> ret = drm_dev_register(ddev, 0);
> if (ret)
> - goto err_register;
> + goto err_cleanup;
>
> drm_mode_config_reset(ddev);
>
> @@ -238,8 +240,6 @@ static int sti_bind(struct device *dev)
>
> return 0;
>
> -err_register:
> - drm_mode_config_cleanup(ddev);
> err_cleanup:
> sti_cleanup(ddev);
> err_drm_dev_put:
> diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c
> index c32de6cbf061..87b50451afd7 100644
> --- a/drivers/gpu/drm/sti/sti_gdp.c
> +++ b/drivers/gpu/drm/sti/sti_gdp.c
> @@ -879,14 +879,6 @@ static const struct drm_plane_helper_funcs sti_gdp_helpers_funcs = {
> .atomic_disable = sti_gdp_atomic_disable,
> };
>
> -static void sti_gdp_destroy(struct drm_plane *drm_plane)
> -{
> - DRM_DEBUG_DRIVER("\n");
> -
> - drm_plane_helper_disable(drm_plane, NULL);
> - drm_plane_cleanup(drm_plane);
> -}
> -
> static int sti_gdp_late_register(struct drm_plane *drm_plane)
> {
> struct sti_plane *plane = to_sti_plane(drm_plane);
> @@ -898,7 +890,7 @@ static int sti_gdp_late_register(struct drm_plane *drm_plane)
> static const struct drm_plane_funcs sti_gdp_plane_helpers_funcs = {
> .update_plane = drm_atomic_helper_update_plane,
> .disable_plane = drm_atomic_helper_disable_plane,
> - .destroy = sti_gdp_destroy,
> + .destroy = drm_plane_cleanup,
> .reset = sti_plane_reset,
> .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
> diff --git a/drivers/gpu/drm/sti/sti_hqvdp.c b/drivers/gpu/drm/sti/sti_hqvdp.c
> index 03ac3b4a4469..065a5b08a702 100644
> --- a/drivers/gpu/drm/sti/sti_hqvdp.c
> +++ b/drivers/gpu/drm/sti/sti_hqvdp.c
> @@ -1256,14 +1256,6 @@ static const struct drm_plane_helper_funcs sti_hqvdp_helpers_funcs = {
> .atomic_disable = sti_hqvdp_atomic_disable,
> };
>
> -static void sti_hqvdp_destroy(struct drm_plane *drm_plane)
> -{
> - DRM_DEBUG_DRIVER("\n");
> -
> - drm_plane_helper_disable(drm_plane, NULL);
> - drm_plane_cleanup(drm_plane);
> -}
> -
> static int sti_hqvdp_late_register(struct drm_plane *drm_plane)
> {
> struct sti_plane *plane = to_sti_plane(drm_plane);
> @@ -1275,7 +1267,7 @@ static int sti_hqvdp_late_register(struct drm_plane *drm_plane)
> static const struct drm_plane_funcs sti_hqvdp_plane_helpers_funcs = {
> .update_plane = drm_atomic_helper_update_plane,
> .disable_plane = drm_atomic_helper_disable_plane,
> - .destroy = sti_hqvdp_destroy,
> + .destroy = drm_plane_cleanup,
> .reset = sti_plane_reset,
> .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
> diff --git a/drivers/gpu/drm/sti/sti_tvout.c b/drivers/gpu/drm/sti/sti_tvout.c
> index ea4a3b87fa55..4dc3b2ec40eb 100644
> --- a/drivers/gpu/drm/sti/sti_tvout.c
> +++ b/drivers/gpu/drm/sti/sti_tvout.c
> @@ -788,21 +788,6 @@ static void sti_tvout_create_encoders(struct drm_device *dev,
> tvout->dvo = sti_tvout_create_dvo_encoder(dev, tvout);
> }
>
> -static void sti_tvout_destroy_encoders(struct sti_tvout *tvout)
> -{
> - if (tvout->hdmi)
> - drm_encoder_cleanup(tvout->hdmi);
> - tvout->hdmi = NULL;
> -
> - if (tvout->hda)
> - drm_encoder_cleanup(tvout->hda);
> - tvout->hda = NULL;
> -
> - if (tvout->dvo)
> - drm_encoder_cleanup(tvout->dvo);
> - tvout->dvo = NULL;
> -}
> -
> static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
> {
> struct sti_tvout *tvout = dev_get_drvdata(dev);
> @@ -815,17 +800,8 @@ static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
> return 0;
> }
>
> -static void sti_tvout_unbind(struct device *dev, struct device *master,
> - void *data)
> -{
> - struct sti_tvout *tvout = dev_get_drvdata(dev);
> -
> - sti_tvout_destroy_encoders(tvout);
> -}
> -
> static const struct component_ops sti_tvout_ops = {
> .bind = sti_tvout_bind,
> - .unbind = sti_tvout_unbind,
> };
>
> static int sti_tvout_probe(struct platform_device *pdev)
> --
> 2.15.0
>
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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