DRM sub-drivers need to access DRM device early during first stage of drivers' probing. Use new host1x init/deinit callbacks to create DRM device early and destroy late.
Cc: stable@vger.kernel.org # 5.13+ Signed-off-by: Dmitry Osipenko digetx@gmail.com --- drivers/gpu/drm/tegra/drm.c | 46 ++++++++++++++++++++++++++----------- drivers/gpu/drm/tegra/drm.h | 2 ++ 2 files changed, 35 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index e9de91a4e7e8..e9cbcaf6e017 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -1133,21 +1133,42 @@ static bool host1x_drm_wants_iommu(struct host1x_device *dev) return domain != NULL; }
-static int host1x_drm_probe(struct host1x_device *dev) +static struct drm_device *terga_drm_dev; + +struct drm_device *tegra_drm_device(void) { - struct tegra_drm *tegra; - struct drm_device *drm; - int err; + return terga_drm_dev; +}
- drm = drm_dev_alloc(&tegra_drm_driver, &dev->dev); +static int host1x_drm_dev_init(struct host1x_device *dev) +{ + struct drm_device *drm = drm_dev_alloc(&tegra_drm_driver, &dev->dev); if (IS_ERR(drm)) return PTR_ERR(drm);
+ dev_set_drvdata(&dev->dev, drm); + terga_drm_dev = drm; + + return 0; +} + +static void host1x_drm_dev_deinit(struct host1x_device *dev) +{ + struct drm_device *drm = dev_get_drvdata(&dev->dev); + + terga_drm_dev = NULL; + drm_dev_put(drm); +} + +static int host1x_drm_probe(struct host1x_device *dev) +{ + struct drm_device *drm = dev_get_drvdata(&dev->dev); + struct tegra_drm *tegra; + int err; + tegra = kzalloc(sizeof(*tegra), GFP_KERNEL); - if (!tegra) { - err = -ENOMEM; - goto put; - } + if (!tegra) + return -ENOMEM;
if (host1x_drm_wants_iommu(dev) && iommu_present(&platform_bus_type)) { tegra->domain = iommu_domain_alloc(&platform_bus_type); @@ -1164,7 +1185,6 @@ static int host1x_drm_probe(struct host1x_device *dev) mutex_init(&tegra->clients_lock); INIT_LIST_HEAD(&tegra->clients);
- dev_set_drvdata(&dev->dev, drm); drm->dev_private = tegra; tegra->drm = drm;
@@ -1285,8 +1305,7 @@ static int host1x_drm_probe(struct host1x_device *dev) iommu_domain_free(tegra->domain); free: kfree(tegra); -put: - drm_dev_put(drm); + return err; }
@@ -1319,7 +1338,6 @@ static int host1x_drm_remove(struct host1x_device *dev) }
kfree(tegra); - drm_dev_put(drm);
return 0; } @@ -1391,6 +1409,8 @@ static struct host1x_driver host1x_drm_driver = { .probe = host1x_drm_probe, .remove = host1x_drm_remove, .subdevs = host1x_drm_subdevs, + .init = host1x_drm_dev_init, + .deinit = host1x_drm_dev_deinit, };
static struct platform_driver * const drivers[] = { diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h index fc0a19554eac..8b7c9508070f 100644 --- a/drivers/gpu/drm/tegra/drm.h +++ b/drivers/gpu/drm/tegra/drm.h @@ -121,6 +121,8 @@ int tegra_drm_unregister_client(struct tegra_drm *tegra, int host1x_client_iommu_attach(struct host1x_client *client); void host1x_client_iommu_detach(struct host1x_client *client);
+struct drm_device *tegra_drm_device(void); + int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm); int tegra_drm_exit(struct tegra_drm *tegra);