mirror of https://gitee.com/openkylin/linux.git
drm: rcar-du: Perform initialization/cleanup at probe/remove time
The drm driver .load() operation is prone to race conditions as it initializes the driver after registering the device nodes. Its usage is deprecated, inline it in the probe function and call drm_dev_alloc() and drm_dev_register() explicitly. For consistency inline the .unload() handler in the remove function as well. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Laurent Pinchart
parent
4c4400504f
commit
c1d4b38c93
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@ -144,82 +144,6 @@ MODULE_DEVICE_TABLE(of, rcar_du_of_table);
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* DRM operations
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*/
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static int rcar_du_unload(struct drm_device *dev)
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{
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struct rcar_du_device *rcdu = dev->dev_private;
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if (rcdu->fbdev)
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drm_fbdev_cma_fini(rcdu->fbdev);
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drm_kms_helper_poll_fini(dev);
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drm_mode_config_cleanup(dev);
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drm_vblank_cleanup(dev);
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dev->irq_enabled = 0;
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dev->dev_private = NULL;
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return 0;
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}
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static int rcar_du_load(struct drm_device *dev, unsigned long flags)
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{
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struct platform_device *pdev = dev->platformdev;
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struct device_node *np = pdev->dev.of_node;
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struct rcar_du_device *rcdu;
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struct resource *mem;
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int ret;
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if (np == NULL) {
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dev_err(dev->dev, "no platform data\n");
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return -ENODEV;
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}
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rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
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if (rcdu == NULL) {
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dev_err(dev->dev, "failed to allocate private data\n");
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return -ENOMEM;
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}
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init_waitqueue_head(&rcdu->commit.wait);
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rcdu->dev = &pdev->dev;
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rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
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rcdu->ddev = dev;
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dev->dev_private = rcdu;
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/* I/O resources */
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
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if (IS_ERR(rcdu->mmio))
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return PTR_ERR(rcdu->mmio);
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/* Initialize vertical blanking interrupts handling. Start with vblank
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* disabled for all CRTCs.
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*/
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ret = drm_vblank_init(dev, (1 << rcdu->info->num_crtcs) - 1);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize vblank\n");
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goto done;
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}
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/* DRM/KMS objects */
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ret = rcar_du_modeset_init(rcdu);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize DRM/KMS (%d)\n", ret);
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goto done;
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}
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dev->irq_enabled = 1;
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platform_set_drvdata(pdev, rcdu);
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done:
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if (ret)
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rcar_du_unload(dev);
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return ret;
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}
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static void rcar_du_lastclose(struct drm_device *dev)
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{
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struct rcar_du_device *rcdu = dev->dev_private;
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@ -260,10 +184,7 @@ static const struct file_operations rcar_du_fops = {
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static struct drm_driver rcar_du_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
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| DRIVER_ATOMIC,
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.load = rcar_du_load,
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.unload = rcar_du_unload,
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.lastclose = rcar_du_lastclose,
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.set_busid = drm_platform_set_busid,
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.get_vblank_counter = drm_vblank_no_hw_counter,
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.enable_vblank = rcar_du_enable_vblank,
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.disable_vblank = rcar_du_disable_vblank,
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@ -323,20 +244,118 @@ static const struct dev_pm_ops rcar_du_pm_ops = {
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* Platform driver
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*/
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static int rcar_du_probe(struct platform_device *pdev)
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{
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return drm_platform_init(&rcar_du_driver, pdev);
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}
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static int rcar_du_remove(struct platform_device *pdev)
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{
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struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
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struct drm_device *ddev = rcdu->ddev;
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drm_put_dev(rcdu->ddev);
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mutex_lock(&ddev->mode_config.mutex);
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drm_connector_unplug_all(ddev);
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mutex_unlock(&ddev->mode_config.mutex);
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drm_dev_unregister(ddev);
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if (rcdu->fbdev)
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drm_fbdev_cma_fini(rcdu->fbdev);
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drm_kms_helper_poll_fini(ddev);
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drm_mode_config_cleanup(ddev);
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drm_vblank_cleanup(ddev);
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drm_dev_unref(ddev);
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return 0;
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}
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static int rcar_du_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct rcar_du_device *rcdu;
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struct drm_connector *connector;
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struct drm_device *ddev;
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struct resource *mem;
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int ret;
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if (np == NULL) {
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dev_err(&pdev->dev, "no device tree node\n");
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return -ENODEV;
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}
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/* Allocate and initialize the DRM and R-Car device structures. */
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rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
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if (rcdu == NULL)
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return -ENOMEM;
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init_waitqueue_head(&rcdu->commit.wait);
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rcdu->dev = &pdev->dev;
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rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
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ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
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if (!ddev)
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return -ENOMEM;
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drm_dev_set_unique(ddev, dev_name(&pdev->dev));
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rcdu->ddev = ddev;
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ddev->dev_private = rcdu;
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platform_set_drvdata(pdev, rcdu);
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/* I/O resources */
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
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if (IS_ERR(rcdu->mmio)) {
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ret = PTR_ERR(rcdu->mmio);
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goto error;
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}
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/* Initialize vertical blanking interrupts handling. Start with vblank
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* disabled for all CRTCs.
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*/
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ret = drm_vblank_init(ddev, (1 << rcdu->info->num_crtcs) - 1);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize vblank\n");
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goto error;
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}
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/* DRM/KMS objects */
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ret = rcar_du_modeset_init(rcdu);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize DRM/KMS (%d)\n", ret);
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goto error;
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}
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ddev->irq_enabled = 1;
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/* Register the DRM device with the core and the connectors with
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* sysfs.
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*/
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ret = drm_dev_register(ddev, 0);
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if (ret)
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goto error;
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mutex_lock(&ddev->mode_config.mutex);
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drm_for_each_connector(connector, ddev) {
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ret = drm_connector_register(connector);
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if (ret < 0)
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break;
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}
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mutex_unlock(&ddev->mode_config.mutex);
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if (ret < 0)
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goto error;
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DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
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return 0;
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error:
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rcar_du_remove(pdev);
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return ret;
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}
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static struct platform_driver rcar_du_platform_driver = {
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.probe = rcar_du_probe,
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.remove = rcar_du_remove,
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@ -55,12 +55,6 @@ static const struct drm_connector_helper_funcs connector_helper_funcs = {
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.best_encoder = rcar_du_connector_best_encoder,
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};
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static void rcar_du_hdmi_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static enum drm_connector_status
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rcar_du_hdmi_connector_detect(struct drm_connector *connector, bool force)
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{
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@ -79,7 +73,7 @@ static const struct drm_connector_funcs connector_funcs = {
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.reset = drm_atomic_helper_connector_reset,
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.detect = rcar_du_hdmi_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = rcar_du_hdmi_connector_destroy,
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.destroy = drm_connector_cleanup,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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@ -108,9 +102,6 @@ int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,
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return ret;
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drm_connector_helper_add(connector, &connector_helper_funcs);
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ret = drm_connector_register(connector);
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if (ret < 0)
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return ret;
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connector->dpms = DRM_MODE_DPMS_OFF;
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drm_object_property_set_value(&connector->base,
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@ -62,12 +62,6 @@ static const struct drm_connector_helper_funcs connector_helper_funcs = {
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.best_encoder = rcar_du_connector_best_encoder,
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};
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static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static enum drm_connector_status
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rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
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{
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@ -79,7 +73,7 @@ static const struct drm_connector_funcs connector_funcs = {
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.reset = drm_atomic_helper_connector_reset,
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.detect = rcar_du_lvds_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = rcar_du_lvds_connector_destroy,
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.destroy = drm_connector_cleanup,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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@ -117,9 +111,6 @@ int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
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return ret;
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drm_connector_helper_add(connector, &connector_helper_funcs);
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ret = drm_connector_register(connector);
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if (ret < 0)
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return ret;
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connector->dpms = DRM_MODE_DPMS_OFF;
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drm_object_property_set_value(&connector->base,
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@ -31,12 +31,6 @@ static const struct drm_connector_helper_funcs connector_helper_funcs = {
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.best_encoder = rcar_du_connector_best_encoder,
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};
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static void rcar_du_vga_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static enum drm_connector_status
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rcar_du_vga_connector_detect(struct drm_connector *connector, bool force)
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{
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@ -48,7 +42,7 @@ static const struct drm_connector_funcs connector_funcs = {
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.reset = drm_atomic_helper_connector_reset,
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.detect = rcar_du_vga_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = rcar_du_vga_connector_destroy,
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.destroy = drm_connector_cleanup,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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@ -76,9 +70,6 @@ int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
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return ret;
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drm_connector_helper_add(connector, &connector_helper_funcs);
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ret = drm_connector_register(connector);
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if (ret < 0)
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return ret;
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connector->dpms = DRM_MODE_DPMS_OFF;
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drm_object_property_set_value(&connector->base,
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