diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 87 |
1 files changed, 60 insertions, 27 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 6915f897bd8e..5af25ce5bf7c 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -94,6 +94,8 @@ EXPORT_SYMBOL(drm_crtc_from_index); * drm_crtc_force_disable - Forcibly turn off a CRTC * @crtc: CRTC to turn off * + * Note: This should only be used by non-atomic legacy drivers. + * * Returns: * Zero on success, error code on failure. */ @@ -103,6 +105,8 @@ int drm_crtc_force_disable(struct drm_crtc *crtc) .crtc = crtc, }; + WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); + return drm_mode_set_config_internal(&set); } EXPORT_SYMBOL(drm_crtc_force_disable); @@ -114,6 +118,9 @@ EXPORT_SYMBOL(drm_crtc_force_disable); * Drivers may want to call this on unload to ensure that all displays are * unlit and the GPU is in a consistent, low power state. Takes modeset locks. * + * Note: This should only be used by non-atomic legacy drivers. For an atomic + * version look at drm_atomic_helper_shutdown(). + * * Returns: * Zero on success, error code on failure. */ @@ -282,7 +289,7 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, spin_lock_init(&crtc->commit_lock); drm_modeset_lock_init(&crtc->mutex); - ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); + ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); if (ret) return ret; @@ -399,9 +406,9 @@ int drm_mode_getcrtc(struct drm_device *dev, if (!crtc) return -ENOENT; - drm_modeset_lock_crtc(crtc, crtc->primary); crtc_resp->gamma_size = crtc->gamma_size; + drm_modeset_lock(&crtc->primary->mutex, NULL); if (crtc->primary->state && crtc->primary->state->fb) crtc_resp->fb_id = crtc->primary->state->fb->base.id; else if (!crtc->primary->state && crtc->primary->fb) @@ -409,9 +416,14 @@ int drm_mode_getcrtc(struct drm_device *dev, else crtc_resp->fb_id = 0; - if (crtc->state) { + if (crtc->primary->state) { crtc_resp->x = crtc->primary->state->src_x >> 16; crtc_resp->y = crtc->primary->state->src_y >> 16; + } + drm_modeset_unlock(&crtc->primary->mutex); + + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state) { if (crtc->state->enable) { drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); crtc_resp->mode_valid = 1; @@ -430,23 +442,13 @@ int drm_mode_getcrtc(struct drm_device *dev, crtc_resp->mode_valid = 0; } } - drm_modeset_unlock_crtc(crtc); + drm_modeset_unlock(&crtc->mutex); return 0; } -/** - * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config - * @set: modeset config to set - * - * This is a little helper to wrap internal calls to the - * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is - * correct refcounting dance. - * - * Returns: - * Zero on success, negative errno on failure. - */ -int drm_mode_set_config_internal(struct drm_mode_set *set) +static int __drm_mode_set_config_internal(struct drm_mode_set *set, + struct drm_modeset_acquire_ctx *ctx) { struct drm_crtc *crtc = set->crtc; struct drm_framebuffer *fb; @@ -463,7 +465,7 @@ int drm_mode_set_config_internal(struct drm_mode_set *set) fb = set->fb; - ret = crtc->funcs->set_config(set); + ret = crtc->funcs->set_config(set, ctx); if (ret == 0) { crtc->primary->crtc = crtc; crtc->primary->fb = fb; @@ -471,14 +473,33 @@ int drm_mode_set_config_internal(struct drm_mode_set *set) drm_for_each_crtc(tmp, crtc->dev) { if (tmp->primary->fb) - drm_framebuffer_reference(tmp->primary->fb); + drm_framebuffer_get(tmp->primary->fb); if (tmp->primary->old_fb) - drm_framebuffer_unreference(tmp->primary->old_fb); + drm_framebuffer_put(tmp->primary->old_fb); tmp->primary->old_fb = NULL; } return ret; } +/** + * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config + * @set: modeset config to set + * + * This is a little helper to wrap internal calls to the + * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is + * correct refcounting dance. + * + * This should only be used by non-atomic legacy drivers. + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_mode_set_config_internal(struct drm_mode_set *set) +{ + WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev)); + + return __drm_mode_set_config_internal(set, NULL); +} EXPORT_SYMBOL(drm_mode_set_config_internal); /** @@ -534,6 +555,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, struct drm_display_mode *mode = NULL; struct drm_mode_set set; uint32_t __user *set_connectors_ptr; + struct drm_modeset_acquire_ctx ctx; int ret; int i; @@ -547,15 +569,19 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) return -ERANGE; - drm_modeset_lock_all(dev); crtc = drm_crtc_find(dev, crtc_req->crtc_id); if (!crtc) { DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); - ret = -ENOENT; - goto out; + return -ENOENT; } DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); + mutex_lock(&crtc->dev->mode_config.mutex); + drm_modeset_acquire_init(&ctx, 0); +retry: + ret = drm_modeset_lock_all_ctx(crtc->dev, &ctx); + if (ret) + goto out; if (crtc_req->mode_valid) { /* If we have a mode we need a framebuffer. */ /* If we pass -1, set the mode with the currently bound fb */ @@ -567,7 +593,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, } fb = crtc->primary->fb; /* Make refcounting symmetric with the lookup path. */ - drm_framebuffer_reference(fb); + drm_framebuffer_get(fb); } else { fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); if (!fb) { @@ -676,21 +702,28 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, set.connectors = connector_set; set.num_connectors = crtc_req->count_connectors; set.fb = fb; - ret = drm_mode_set_config_internal(&set); + ret = __drm_mode_set_config_internal(&set, &ctx); out: if (fb) - drm_framebuffer_unreference(fb); + drm_framebuffer_put(fb); if (connector_set) { for (i = 0; i < crtc_req->count_connectors; i++) { if (connector_set[i]) - drm_connector_unreference(connector_set[i]); + drm_connector_put(connector_set[i]); } } kfree(connector_set); drm_mode_destroy(dev, mode); - drm_modeset_unlock_all(dev); + if (ret == -EDEADLK) { + drm_modeset_backoff(&ctx); + goto retry; + } + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); + mutex_unlock(&crtc->dev->mode_config.mutex); + return ret; } |