Add new drm_core_check_all_features() function to check for a mask of
features. All features in the mask are required.
Redefine existing drm_core_check_feature() in terms of this function,
using the drm_driver_feature enum for the parameter.
v3:
- add drm_core_check_all_features() (Thomas)
v2:
- fix kernel-doc (Ville)
- add an extra variable for clarity (Ville)
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Reviewed-by: Thomas Zimmermann <tzimmerm...@suse.de>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
include/drm/drm_drv.h | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index cf13470810a5..23b636691fb4 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -823,6 +823,25 @@ static inline bool drm_dev_is_unplugged(struct drm_device
*dev)
return true;
}
+/**
+ * drm_core_check_all_features - check driver feature flags mask
+ * @dev: DRM device to check
+ * @features: feature flag(s) mask
+ *
+ * This checks @dev for driver features, see &drm_driver.driver_features,
+ * &drm_device.driver_features, and the various &enum drm_driver_feature flags.
+ *
+ * Returns true if all features in the @features mask are supported, false
+ * otherwise.
+ */
+static inline bool drm_core_check_all_features(const struct drm_device *dev,
+ u32 features)
+{
+ u32 supported = dev->driver->driver_features & dev->driver_features;
+
+ return features && (supported & features) == features;
+}
+
/**
* drm_core_check_feature - check driver feature flags
* @dev: DRM device to check
@@ -833,9 +852,10 @@ static inline bool drm_dev_is_unplugged(struct drm_device
*dev)
*
* Returns true if the @feature is supported, false otherwise.
*/
-static inline bool drm_core_check_feature(const struct drm_device *dev, u32
feature)
+static inline bool drm_core_check_feature(const struct drm_device *dev,
+ enum drm_driver_feature feature)
{
- return dev->driver->driver_features & dev->driver_features & feature;
+ return drm_core_check_all_features(dev, feature);
}
/**
--
2.20.1
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