logger_types.h defines many DC_LOG_*() categorized debug wrappers. Most of these use DRM debug API, so are controllable using drm.debug, but others use bare pr_debug("$prefix: .."), each with a different class-prefix matching "^[\w+]:"
Use DEFINE_DYNAMIC_DEBUG_CATEGORIES to create a /sys debug_dc parameter, modinfos, and to specify a map from bits -> categorized pr_debugs to be controlled.
Signed-off-by: Jim Cromie jim.cromie@gmail.com --- .../gpu/drm/amd/display/dc/core/dc_debug.c | 44 ++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_debug.c b/drivers/gpu/drm/amd/display/dc/core/dc_debug.c index 21be2a684393..69e68d721512 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_debug.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_debug.c @@ -36,8 +36,50 @@
#include "resource.h"
-#define DC_LOGGER_INIT(logger) +#ifdef DRM_USE_DYNAMIC_DEBUG +/* define a drm.debug style dyndbg pr-debug control point */ +#include <linux/dynamic_debug.h> + +unsigned long __debug_dc; +EXPORT_SYMBOL(__debug_dc); + +#define _help_(key) "\t " key "\t- help for " key "\n" + +/* Id like to do these inside DEFINE_DYNAMIC_DEBUG_CATEGORIES, if possible */ +#define DC_DYNDBG_BITMAP_DESC(name) \ + "Control pr_debugs via /sys/module/amdgpu/parameters/" #name \ + ", where each bit controls a debug category.\n" \ + _help_("[SURFACE]:") \ + _help_("[CURSOR]:") \ + _help_("[PFLIP]:") \ + _help_("[VBLANK]:") \ + _help_("[HW_LINK_TRAINING]:") \ + _help_("[HW_AUDIO]:") \ + _help_("[SCALER]:") \ + _help_("[BIOS]:") \ + _help_("[BANDWIDTH_CALCS]:") \ + _help_("[DML]:") \ + _help_("[IF_TRACE]:") \ + _help_("[GAMMA]:") \ + _help_("[SMU_MSG]:") + +DEFINE_DYNAMIC_DEBUG_CATEGORIES(debug_dc, __debug_dc, + DC_DYNDBG_BITMAP_DESC(debug_dc), + _DD_cat_("[CURSOR]:"), + _DD_cat_("[PFLIP]:"), + _DD_cat_("[VBLANK]:"), + _DD_cat_("[HW_LINK_TRAINING]:"), + _DD_cat_("[HW_AUDIO]:"), + _DD_cat_("[SCALER]:"), + _DD_cat_("[BIOS]:"), + _DD_cat_("[BANDWIDTH_CALCS]:"), + _DD_cat_("[DML]:"), + _DD_cat_("[IF_TRACE]:"), + _DD_cat_("[GAMMA]:"), + _DD_cat_("[SMU_MSG]:")); +#endif
+#define DC_LOGGER_INIT(logger)
#define SURFACE_TRACE(...) do {\ if (dc->debug.surface_trace) \