From 728ae8dd696a483355b593487eba73f4c64f1152 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 28 May 2015 00:21:29 +0300 Subject: drm: omapdrm: Handle FIFO underflow IRQs internally As the FIFO underflow IRQ handler just prints an error message to the kernel log, simplify the code by not registering one IRQ handler per plane but print the messages directly from the main IRQ handler. Signed-off-by: Laurent Pinchart Reviewed-by: Tomi Valkeinen --- drivers/gpu/drm/omapdrm/omap_drv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/omapdrm/omap_drv.c') diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index fdc83cbcde61..6faba13c8e41 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -315,8 +315,6 @@ static int omap_modeset_init(struct drm_device *dev) drm_mode_config_init(dev); - omap_drm_irq_install(dev); - ret = omap_modeset_init_properties(dev); if (ret < 0) return ret; @@ -489,6 +487,8 @@ static int omap_modeset_init(struct drm_device *dev) drm_mode_config_reset(dev); + omap_drm_irq_install(dev); + return 0; } -- cgit v1.2.3 From dadf4659d0608e034b6633f30300c2eff2dafb4c Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 6 Jun 2016 04:25:04 +0300 Subject: drm: omapdrm: Let the DRM core skip plane commit on inactive CRTCs The DRM core supports skipping plane update for inactive CRTCs for hardware that don't need it or can't cope with it. That's our case, and the driver already skips flushing planes on inactice CRTCs. We can't remove the check from the driver, as active CRTCs are disabled at the hardware level when an atomic flush is performed if a mode set is pending. There's however no need to forward the plane commit calls to the driver, so use the DRM core infrastructure to skip them with a detailed comment to explain why the check must still be kept in the driver. Signed-off-by: Laurent Pinchart Reviewed-by: Tomi Valkeinen --- drivers/gpu/drm/omapdrm/omap_crtc.c | 8 +++++++- drivers/gpu/drm/omapdrm/omap_drv.c | 3 ++- 2 files changed, 9 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/omapdrm/omap_drv.c') diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c index 42c3b44f9689..2832dbffd873 100644 --- a/drivers/gpu/drm/omapdrm/omap_crtc.c +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c @@ -414,7 +414,13 @@ static void omap_crtc_atomic_flush(struct drm_crtc *crtc, dispc_mgr_set_gamma(omap_crtc->channel, lut, length); } - /* Only flush the CRTC if it is currently enabled. */ + /* + * Only flush the CRTC if it is currently enabled. CRTCs that require a + * mode set are disabled prior plane updates and enabled afterwards. + * They are thus not active (regardless of what their CRTC core state + * reports) and the DRM core could thus call this function even though + * the CRTC is currently disabled. Do nothing in that case. + */ if (!omap_crtc->enabled) return; diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index 6faba13c8e41..0a2d461d62cf 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -96,7 +96,8 @@ static void omap_atomic_complete(struct omap_atomic_state_commit *commit) dispc_runtime_get(); drm_atomic_helper_commit_modeset_disables(dev, old_state); - drm_atomic_helper_commit_planes(dev, old_state, 0); + drm_atomic_helper_commit_planes(dev, old_state, + DRM_PLANE_COMMIT_ACTIVE_ONLY); drm_atomic_helper_commit_modeset_enables(dev, old_state); omap_atomic_wait_for_completion(dev, old_state); -- cgit v1.2.3 From 2f95bc6d324a93b2411bcc5defe4d4414c45f325 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 12 Dec 2016 11:28:47 +0200 Subject: drm: omapdrm: 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 Reviewed-by: Tomi Valkeinen --- drivers/gpu/drm/omapdrm/omap_connector.c | 2 - drivers/gpu/drm/omapdrm/omap_drv.c | 211 +++++++++++++++---------------- 2 files changed, 105 insertions(+), 108 deletions(-) (limited to 'drivers/gpu/drm/omapdrm/omap_drv.c') diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c index 691cffebb76e..f90e2d22c5ec 100644 --- a/drivers/gpu/drm/omapdrm/omap_connector.c +++ b/drivers/gpu/drm/omapdrm/omap_connector.c @@ -240,8 +240,6 @@ struct drm_connector *omap_connector_init(struct drm_device *dev, connector->interlace_allowed = 1; connector->doublescan_allowed = 0; - drm_connector_register(connector); - return connector; fail: diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index 0a2d461d62cf..00aa214b7560 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -493,11 +493,6 @@ static int omap_modeset_init(struct drm_device *dev) return 0; } -static void omap_modeset_free(struct drm_device *dev) -{ - drm_mode_config_cleanup(dev); -} - /* * drm ioctl funcs */ @@ -633,95 +628,6 @@ static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = * drm driver funcs */ -/** - * load - setup chip and create an initial config - * @dev: DRM device - * @flags: startup flags - * - * The driver load routine has to do several things: - * - initialize the memory manager - * - allocate initial config memory - * - setup the DRM framebuffer with the allocated memory - */ -static int dev_load(struct drm_device *dev, unsigned long flags) -{ - struct omap_drm_platform_data *pdata = dev->dev->platform_data; - struct omap_drm_private *priv; - unsigned int i; - int ret; - - DBG("load: dev=%p", dev); - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - priv->omaprev = pdata->omaprev; - - dev->dev_private = priv; - - priv->wq = alloc_ordered_workqueue("omapdrm", 0); - init_waitqueue_head(&priv->commit.wait); - spin_lock_init(&priv->commit.lock); - - spin_lock_init(&priv->list_lock); - INIT_LIST_HEAD(&priv->obj_list); - - omap_gem_init(dev); - - ret = omap_modeset_init(dev); - if (ret) { - dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret); - dev->dev_private = NULL; - kfree(priv); - return ret; - } - - /* Initialize vblank handling, start with all CRTCs disabled. */ - ret = drm_vblank_init(dev, priv->num_crtcs); - if (ret) - dev_warn(dev->dev, "could not init vblank\n"); - - for (i = 0; i < priv->num_crtcs; i++) - drm_crtc_vblank_off(priv->crtcs[i]); - - priv->fbdev = omap_fbdev_init(dev); - - /* store off drm_device for use in pm ops */ - dev_set_drvdata(dev->dev, dev); - - drm_kms_helper_poll_init(dev); - - return 0; -} - -static int dev_unload(struct drm_device *dev) -{ - struct omap_drm_private *priv = dev->dev_private; - - DBG("unload: dev=%p", dev); - - drm_kms_helper_poll_fini(dev); - - if (priv->fbdev) - omap_fbdev_free(dev); - - omap_modeset_free(dev); - omap_gem_deinit(dev); - - destroy_workqueue(priv->wq); - - drm_vblank_cleanup(dev); - omap_drm_irq_uninstall(dev); - - kfree(dev->dev_private); - dev->dev_private = NULL; - - dev_set_drvdata(dev->dev, NULL); - - return 0; -} - static int dev_open(struct drm_device *dev, struct drm_file *file) { file->driver_priv = NULL; @@ -806,8 +712,6 @@ static const struct file_operations omapdriver_fops = { static struct drm_driver omap_drm_driver = { .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC, - .load = dev_load, - .unload = dev_unload, .open = dev_open, .lastclose = dev_lastclose, .get_vblank_counter = drm_vblank_no_hw_counter, @@ -837,30 +741,125 @@ static struct drm_driver omap_drm_driver = { .patchlevel = DRIVER_PATCHLEVEL, }; -static int pdev_probe(struct platform_device *device) +static int pdev_probe(struct platform_device *pdev) { - int r; + struct omap_drm_platform_data *pdata = pdev->dev.platform_data; + struct omap_drm_private *priv; + struct drm_device *ddev; + unsigned int i; + int ret; + + DBG("%s", pdev->name); if (omapdss_is_initialized() == false) return -EPROBE_DEFER; omap_crtc_pre_init(); - r = omap_connect_dssdevs(); - if (r) { - omap_crtc_pre_uninit(); - return r; + ret = omap_connect_dssdevs(); + if (ret) + goto err_crtc_uninit; + + /* Allocate and initialize the driver private structure. */ + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) { + ret = -ENOMEM; + goto err_disconnect_dssdevs; + } + + priv->omaprev = pdata->omaprev; + priv->wq = alloc_ordered_workqueue("omapdrm", 0); + + init_waitqueue_head(&priv->commit.wait); + spin_lock_init(&priv->commit.lock); + spin_lock_init(&priv->list_lock); + INIT_LIST_HEAD(&priv->obj_list); + + /* Allocate and initialize the DRM device. */ + ddev = drm_dev_alloc(&omap_drm_driver, &pdev->dev); + if (IS_ERR(ddev)) { + ret = PTR_ERR(ddev); + goto err_free_priv; + } + + ddev->dev_private = priv; + platform_set_drvdata(pdev, ddev); + + omap_gem_init(ddev); + + ret = omap_modeset_init(ddev); + if (ret) { + dev_err(&pdev->dev, "omap_modeset_init failed: ret=%d\n", ret); + goto err_free_drm_dev; + } + + /* Initialize vblank handling, start with all CRTCs disabled. */ + ret = drm_vblank_init(ddev, priv->num_crtcs); + if (ret) { + dev_err(&pdev->dev, "could not init vblank\n"); + goto err_cleanup_modeset; } - DBG("%s", device->name); - return drm_platform_init(&omap_drm_driver, device); + for (i = 0; i < priv->num_crtcs; i++) + drm_crtc_vblank_off(priv->crtcs[i]); + + priv->fbdev = omap_fbdev_init(ddev); + + drm_kms_helper_poll_init(ddev); + + /* + * Register the DRM device with the core and the connectors with + * sysfs. + */ + ret = drm_dev_register(ddev, 0); + if (ret) + goto err_cleanup_helpers; + + return 0; + +err_cleanup_helpers: + drm_kms_helper_poll_fini(ddev); + if (priv->fbdev) + omap_fbdev_free(ddev); +err_cleanup_modeset: + drm_mode_config_cleanup(ddev); + omap_drm_irq_uninstall(ddev); +err_free_drm_dev: + omap_gem_deinit(ddev); + drm_dev_unref(ddev); +err_free_priv: + destroy_workqueue(priv->wq); + kfree(priv); +err_disconnect_dssdevs: + omap_disconnect_dssdevs(); +err_crtc_uninit: + omap_crtc_pre_uninit(); + return ret; } -static int pdev_remove(struct platform_device *device) +static int pdev_remove(struct platform_device *pdev) { + struct drm_device *ddev = platform_get_drvdata(pdev); + struct omap_drm_private *priv = ddev->dev_private; + DBG(""); - drm_put_dev(platform_get_drvdata(device)); + drm_dev_unregister(ddev); + + drm_kms_helper_poll_fini(ddev); + + if (priv->fbdev) + omap_fbdev_free(ddev); + + drm_mode_config_cleanup(ddev); + + omap_drm_irq_uninstall(ddev); + omap_gem_deinit(ddev); + + drm_dev_unref(ddev); + + destroy_workqueue(priv->wq); + kfree(priv); omap_disconnect_dssdevs(); omap_crtc_pre_uninit(); -- cgit v1.2.3