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-rw-r--r--Documentation/gpu/drm-usage-stats.rst5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/gpu/drm-usage-stats.rst b/Documentation/gpu/drm-usage-stats.rst
index b7fc106dad99..63d6b2abe5ad 100644
--- a/Documentation/gpu/drm-usage-stats.rst
+++ b/Documentation/gpu/drm-usage-stats.rst
@@ -21,7 +21,10 @@ File format specification
- File shall contain one key value pair per one line of text.
- Colon character (`:`) must be used to delimit keys and values.
-- All keys shall be prefixed with `drm-`.
+- All standardised keys shall be prefixed with `drm-`.
+- Driver-specific keys shall be prefixed with `driver_name-`, where
+ driver_name should ideally be the same as the `name` field in
+ `struct drm_driver`, although this is not mandatory.
- Whitespace between the delimiter and first non-whitespace character shall be
ignored when parsing.
- Keys are not allowed to contain whitespace characters.