[PATCH v9 30/52] drm-dyndbg: adapt drm core to use dyndbg classmaps-v2

Jim Cromie
2024-07-02T21:58:51Z

dyndbg's CLASSMAP-v1 api was broken; DECLARE_DYNDBG_CLASSMAP tried to
do too much. Its replaced by DRM_CLASSMAP_DEFINE, which creates &
EXPORTs the classmap when CONFIG_DRM_USE_DYNAMIC_DEBUG=y, for direct
reference by drivers.

The drivers still use DECLARE_DYNDBG_CLASSMAP for now, so they still
redundantly re-declare the classmap, but we can convert the drivers
later to DYNDBG_CLASSMAP_USE

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
drivers/gpu/drm/drm_print.c | 25 +++++++++++++------------
include/drm/drm_print.h | 8 ++++++++
2 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c
index 699b7dbffd7b..4a5f2317229b 100644
--- a/drivers/gpu/drm/drm_print.c
+++ b/drivers/gpu/drm/drm_print.c
@@ -55,18 +55,19 @@ MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug cat
#if !defined(CONFIG_DRM_USE_DYNAMIC_DEBUG)
module_param_named(debug, __drm_debug, ulong, 0600);
#else
-/* classnames must match vals of enum drm_debug_category */
-DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
- "DRM_UT_CORE",
- "DRM_UT_DRIVER",
- "DRM_UT_KMS",
- "DRM_UT_PRIME",
- "DRM_UT_ATOMIC",
- "DRM_UT_VBL",
- "DRM_UT_STATE",
- "DRM_UT_LEASE",
- "DRM_UT_DP",
- "DRM_UT_DRMRES");
+/* classnames must match value-symbols of enum drm_debug_category */
+DRM_CLASSMAP_DEFINE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS,
+ DRM_UT_CORE,
+ "DRM_UT_CORE",
+ "DRM_UT_DRIVER",
+ "DRM_UT_KMS",
+ "DRM_UT_PRIME",
+ "DRM_UT_ATOMIC",
+ "DRM_UT_VBL",
+ "DRM_UT_STATE",
+ "DRM_UT_LEASE",
+ "DRM_UT_DP",
+ "DRM_UT_DRMRES");

static struct ddebug_class_param drm_debug_bitmap = {
.bits = &__drm_debug,
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index 9cc473e5d353..905fc25bf65a 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -140,6 +140,14 @@ enum drm_debug_category {
DRM_UT_DRMRES
};

+#ifdef CONFIG_DRM_USE_DYNAMIC_DEBUG
+#define DRM_CLASSMAP_DEFINE(...) DYNDBG_CLASSMAP_DEFINE(__VA_ARGS__)
+#define DRM_CLASSMAP_USE(name) DYNDBG_CLASSMAP_USE(name)
+#else
+#define DRM_CLASSMAP_DEFINE(...)
+#define DRM_CLASSMAP_USE(name)
+#endif
+
static inline bool drm_debug_enabled_raw(enum drm_debug_category category)
{
return unlikely(__drm_debug & BIT(category));
--
2.45.2