diff options
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_fb.c | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c index 09e120d50e65..6f4cb4678cbc 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c @@ -418,6 +418,60 @@ static int vmw_fb_compute_depth(struct fb_var_screeninfo *var, return 0; } +static int vmwgfx_set_config_internal(struct drm_mode_set *set) +{ + struct drm_crtc *crtc = set->crtc; + struct drm_framebuffer *fb; + struct drm_crtc *tmp; + struct drm_modeset_acquire_ctx *ctx; + struct drm_device *dev = set->crtc->dev; + int ret; + + ctx = dev->mode_config.acquire_ctx; + +restart: + /* + * NOTE: ->set_config can also disable other crtcs (if we steal all + * connectors from it), hence we need to refcount the fbs across all + * crtcs. Atomic modeset will have saner semantics ... + */ + drm_for_each_crtc(tmp, dev) + tmp->primary->old_fb = tmp->primary->fb; + + fb = set->fb; + + ret = crtc->funcs->set_config(set, ctx); + if (ret == 0) { + crtc->primary->crtc = crtc; + crtc->primary->fb = fb; + } + + drm_for_each_crtc(tmp, dev) { + if (tmp->primary->fb) + drm_framebuffer_get(tmp->primary->fb); + if (tmp->primary->old_fb) + drm_framebuffer_put(tmp->primary->old_fb); + tmp->primary->old_fb = NULL; + } + + if (ret == -EDEADLK) { + dev->mode_config.acquire_ctx = NULL; + +retry_locking: + drm_modeset_backoff(ctx); + + ret = drm_modeset_lock_all_ctx(dev, ctx); + if (ret) + goto retry_locking; + + dev->mode_config.acquire_ctx = ctx; + + goto restart; + } + + return ret; +} + static int vmw_fb_kms_detach(struct vmw_fb_par *par, bool detach_bo, bool unref_bo) @@ -436,7 +490,7 @@ static int vmw_fb_kms_detach(struct vmw_fb_par *par, set.fb = NULL; set.num_connectors = 0; set.connectors = &par->con; - ret = drm_mode_set_config_internal(&set); + ret = vmwgfx_set_config_internal(&set); if (ret) { DRM_ERROR("Could not unset a mode.\n"); return ret; @@ -578,7 +632,7 @@ static int vmw_fb_set_par(struct fb_info *info) set.num_connectors = 1; set.connectors = &par->con; - ret = drm_mode_set_config_internal(&set); + ret = vmwgfx_set_config_internal(&set); if (ret) goto out_unlock; |
