diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 63 |
1 files changed, 44 insertions, 19 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index ecd4e0b4c525..e79c8d3700d8 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -2263,21 +2263,19 @@ out: * * src_{x,y,w,h} are provided in 16.16 fixed point format */ -static int setplane_internal(struct drm_plane *plane, - struct drm_crtc *crtc, - struct drm_framebuffer *fb, - int32_t crtc_x, int32_t crtc_y, - uint32_t crtc_w, uint32_t crtc_h, - /* src_{x,y,w,h} values are 16.16 fixed point */ - uint32_t src_x, uint32_t src_y, - uint32_t src_w, uint32_t src_h) +static int __setplane_internal(struct drm_plane *plane, + struct drm_crtc *crtc, + struct drm_framebuffer *fb, + int32_t crtc_x, int32_t crtc_y, + uint32_t crtc_w, uint32_t crtc_h, + /* src_{x,y,w,h} values are 16.16 fixed point */ + uint32_t src_x, uint32_t src_y, + uint32_t src_w, uint32_t src_h) { - struct drm_device *dev = plane->dev; int ret = 0; unsigned int fb_width, fb_height; int i; - drm_modeset_lock_all(dev); /* No fb means shut it down */ if (!fb) { plane->old_fb = plane->fb; @@ -2345,10 +2343,28 @@ out: if (plane->old_fb) drm_framebuffer_unreference(plane->old_fb); plane->old_fb = NULL; - drm_modeset_unlock_all(dev); return ret; +} + +static int setplane_internal(struct drm_plane *plane, + struct drm_crtc *crtc, + struct drm_framebuffer *fb, + int32_t crtc_x, int32_t crtc_y, + uint32_t crtc_w, uint32_t crtc_h, + /* src_{x,y,w,h} values are 16.16 fixed point */ + uint32_t src_x, uint32_t src_y, + uint32_t src_w, uint32_t src_h) +{ + int ret; + + drm_modeset_lock_all(plane->dev); + ret = __setplane_internal(plane, crtc, fb, + crtc_x, crtc_y, crtc_w, crtc_h, + src_x, src_y, src_w, src_h); + drm_modeset_unlock_all(plane->dev); + return ret; } /** @@ -2714,6 +2730,7 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc, int ret = 0; BUG_ON(!crtc->cursor); + WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); /* * Obtain fb we'll be using (either new or existing) and take an extra @@ -2733,11 +2750,9 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc, fb = NULL; } } else { - mutex_lock(&dev->mode_config.mutex); fb = crtc->cursor->fb; if (fb) drm_framebuffer_reference(fb); - mutex_unlock(&dev->mode_config.mutex); } if (req->flags & DRM_MODE_CURSOR_MOVE) { @@ -2759,7 +2774,7 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc, * setplane_internal will take care of deref'ing either the old or new * framebuffer depending on success. */ - ret = setplane_internal(crtc->cursor, crtc, fb, + ret = __setplane_internal(crtc->cursor, crtc, fb, crtc_x, crtc_y, crtc_w, crtc_h, 0, 0, src_w, src_h); @@ -2795,10 +2810,12 @@ static int drm_mode_cursor_common(struct drm_device *dev, * If this crtc has a universal cursor plane, call that plane's update * handler rather than using legacy cursor handlers. */ - if (crtc->cursor) - return drm_mode_cursor_universal(crtc, req, file_priv); - drm_modeset_lock_crtc(crtc); + if (crtc->cursor) { + ret = drm_mode_cursor_universal(crtc, req, file_priv); + goto out; + } + if (req->flags & DRM_MODE_CURSOR_BO) { if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { ret = -ENXIO; @@ -3383,7 +3400,16 @@ void drm_fb_release(struct drm_file *priv) struct drm_device *dev = priv->minor->dev; struct drm_framebuffer *fb, *tfb; - mutex_lock(&priv->fbs_lock); + /* + * When the file gets released that means no one else can access the fb + * list any more, so no need to grab fpriv->fbs_lock. And we need to to + * avoid upsetting lockdep since the universal cursor code adds a + * framebuffer while holding mutex locks. + * + * Note that a real deadlock between fpriv->fbs_lock and the modeset + * locks is impossible here since no one else but this function can get + * at it any more. + */ list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { mutex_lock(&dev->mode_config.fb_lock); @@ -3396,7 +3422,6 @@ void drm_fb_release(struct drm_file *priv) /* This will also drop the fpriv->fbs reference. */ drm_framebuffer_remove(fb); } - mutex_unlock(&priv->fbs_lock); } /** |