hello gentle readers,
These 2 rfc patches convert part of drm-world to use dynamic debug.
1st one addresses drm.debug category based logging. If DYNAMIC_DEBUG is configured, then CONFIG_DRM_USE_DYNAMIC_DEBUG controls whether dynamic-debug is used to avoid runtime costs of drm_debug_enabled(). We require CONFIG_JUMP_LABEL too, since we are selling its optimization.
This change adds many new callsites to /proc/dynamic_debug/control; ~300 in drm, ~200 in drm_kms_helper, as well as ~1500 in i915 driver, and ~3200 in amdgpu. So there are substantial implications here.
2nd one is for i915, which I have in my laptop. `grep pr_debug` found ~90 callsites with a meaningful format-prefix-string, to demonstrate use of "format ^prefix" to control user categorized debugs.
Jim Cromie (2): drm: RFC add choice to use dynamic debug in drm-debug i915: POC use dynamic_debug_exec_queries to control pr_debugs in gvt
drivers/gpu/drm/Kconfig | 13 +++++ drivers/gpu/drm/drm_print.c | 75 ++++++++++++++++++++++-- drivers/gpu/drm/i915/gvt/Makefile | 1 + drivers/gpu/drm/i915/i915_params.c | 74 ++++++++++++++++++++++++ include/drm/drm_print.h | 92 ++++++++++++++++++++++-------- 5 files changed, 228 insertions(+), 27 deletions(-)