drm/nouveau: support for probing platform devices
Add a platform driver for Nouveau devices declared using the device tree
or platform data. This driver currently supports GK20A on Tegra
platforms and is only compiled for these platforms if Nouveau is
enabled.
Nouveau will probe the chip type itself using the BOOT0 register, so all
this driver really needs to do is to make sure the module is powered and
its clocks active before calling nouveau_drm_platform_probe().
Heavily based on work done by Thierry Reding.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 5425ffe..64ec1d3 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -494,10 +494,9 @@
return 0;
}
-static void
-nouveau_drm_remove(struct pci_dev *pdev)
+void
+nouveau_drm_device_remove(struct drm_device *dev)
{
- struct drm_device *dev = pci_get_drvdata(pdev);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_object *device;
@@ -508,6 +507,15 @@
nouveau_object_ref(NULL, &device);
nouveau_object_debug();
}
+EXPORT_SYMBOL(nouveau_drm_device_remove);
+
+static void
+nouveau_drm_remove(struct pci_dev *pdev)
+{
+ struct drm_device *dev = pci_get_drvdata(pdev);
+
+ nouveau_drm_device_remove(dev);
+}
static int
nouveau_do_suspend(struct drm_device *dev, bool runtime)
@@ -1004,24 +1012,41 @@
.driver.pm = &nouveau_pm_ops,
};
-int nouveau_drm_platform_probe(struct platform_device *pdev)
+struct drm_device *
+nouveau_platform_device_create_(struct platform_device *pdev, int size,
+ void **pobject)
{
- struct nouveau_device *device;
- int ret;
+ struct drm_device *drm;
+ int err;
- ret = nouveau_device_create(pdev, NOUVEAU_BUS_PLATFORM,
+ err = nouveau_device_create_(pdev, NOUVEAU_BUS_PLATFORM,
nouveau_platform_name(pdev),
dev_name(&pdev->dev), nouveau_config,
- nouveau_debug, &device);
+ nouveau_debug, size, pobject);
+ if (err)
+ return ERR_PTR(err);
- ret = drm_platform_init(&driver, pdev);
- if (ret) {
- nouveau_object_ref(NULL, (struct nouveau_object **)&device);
- return ret;
+ drm = drm_dev_alloc(&driver, &pdev->dev);
+ if (!drm) {
+ err = -ENOMEM;
+ goto err_free;
}
- return ret;
+ err = drm_dev_set_unique(drm, "%s", dev_name(&pdev->dev));
+ if (err < 0)
+ goto err_free;
+
+ drm->platformdev = pdev;
+ platform_set_drvdata(pdev, drm);
+
+ return drm;
+
+err_free:
+ nouveau_object_ref(NULL, (struct nouveau_object **)pobject);
+
+ return ERR_PTR(err);
}
+EXPORT_SYMBOL(nouveau_platform_device_create_);
static int __init
nouveau_drm_init(void)