[PATCH] drm: add drm device name

[Jiang, Sonny]

Add DRM device name and use DRM_IOCTL_VERSION ioctl drmVersion::desc passing it to user space
instead of unused DRM driver name descriptor.

Change-Id: I809f6d3e057111417efbe8fa7cab8f0113ba4b21
Signed-off-by: Sonny Jiang <sonny.jiang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  2 ++
 drivers/gpu/drm/drm_drv.c                  | 17 +++++++++++++++++
 drivers/gpu/drm/drm_ioctl.c                |  2 +-
 include/drm/drm_device.h                   |  3 +++
 include/drm/drm_drv.h                      |  1 +
 5 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 67b09cb2a9e2..8f0971cea363 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2809,6 +2809,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	/* init the mode config */
 	drm_mode_config_init(adev->ddev);
 
+	drm_dev_set_name(adev->ddev, amdgpu_asic_name[adev->asic_type]);
+
 	r = amdgpu_device_ip_init(adev);
 	if (r) {
 		/* failed in exclusive mode due to timeout */
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 862621494a93..6c33879bb538 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -802,6 +802,7 @@ void drm_dev_fini(struct drm_device *dev)
 	mutex_destroy(&dev->struct_mutex);
 	drm_legacy_destroy_members(dev);
 	kfree(dev->unique);
+	kfree(dev->name);
 }
 EXPORT_SYMBOL(drm_dev_fini);
 
@@ -1078,6 +1079,22 @@ int drm_dev_set_unique(struct drm_device *dev, const char *name)
 }
 EXPORT_SYMBOL(drm_dev_set_unique);
 
+/**
+ * drm_dev_set_name - Set the name of a DRM device
+ * @dev: device of which to set the name
+ * @name: name to be set
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int drm_dev_set_name(struct drm_device *dev, const char *name)
+{
+	kfree(dev->name);
+	dev->name = kstrdup(name, GFP_KERNEL);
+
+	return dev->name ? 0 : -ENOMEM;
+}
+EXPORT_SYMBOL(drm_dev_set_name);
+
 /*
  * DRM Core
  * The DRM core module initializes all global DRM objects and makes them
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 2263e3ddd822..61f02965106b 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -506,7 +506,7 @@ int drm_version(struct drm_device *dev, void *data,
 				dev->driver->date);
 	if (!err)
 		err = drm_copy_field(version->desc, &version->desc_len,
-				dev->driver->desc);
+				dev->name);
 
 	return err;
 }
diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
index 7f9ef709b2b6..e29912c484e4 100644
--- a/include/drm/drm_device.h
+++ b/include/drm/drm_device.h
@@ -123,6 +123,9 @@ struct drm_device {
 	/** @unique: Unique name of the device */
 	char *unique;
 
+	/** @name: device name */
+	char *name;
+
 	/**
 	 * @struct_mutex:
 	 *
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 68ca736c548d..f742e2bde467 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -798,6 +798,7 @@ static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
 
 
 int drm_dev_set_unique(struct drm_device *dev, const char *name);
+int drm_dev_set_name(struct drm_device *dev, const char *name);
 
 
 #endif
-- 
2.17.1