The gvt component of this driver has ~120 pr_debugs, in 9 categories quite similar to those in DRM. Following the interface model of drm.debug, add a parameter to map bits to these categorizations.
DEFINE_DYNAMIC_DEBUG_CATEGORIES(debug_gvt, __gvt_debug, "dyndbg bitmap desc", { "gvt:cmd: ", "command processing" }, { "gvt:core: ", "core help" }, { "gvt:dpy: ", "display help" }, { "gvt:el: ", "help" }, { "gvt:irq: ", "help" }, { "gvt:mm: ", "help" }, { "gvt:mmio: ", "help" }, { "gvt:render: ", "help" }, { "gvt:sched: " "help" });
The actual patch has a few details different, cmd_help() macro emits the initialization construct.
if CONFIG_DRM_USE_DYNAMIC_DEBUG, then -DDYNAMIC_DEBUG_MODULE is added cflags, by gvt/Makefile.
--- v4+: . static decl of vector of bit->class descriptors - Emil.V . relocate gvt-makefile chunk from elsewhere
Signed-off-by: Jim Cromie jim.cromie@gmail.com --- drivers/gpu/drm/i915/gvt/Makefile | 4 ++++ drivers/gpu/drm/i915/i915_params.c | 35 ++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+)
diff --git a/drivers/gpu/drm/i915/gvt/Makefile b/drivers/gpu/drm/i915/gvt/Makefile index ea8324abc784..846ba73b8de6 100644 --- a/drivers/gpu/drm/i915/gvt/Makefile +++ b/drivers/gpu/drm/i915/gvt/Makefile @@ -7,3 +7,7 @@ GVT_SOURCE := gvt.o aperture_gm.o handlers.o vgpu.o trace_points.o firmware.o \
ccflags-y += -I $(srctree)/$(src) -I $(srctree)/$(src)/$(GVT_DIR)/ i915-y += $(addprefix $(GVT_DIR)/, $(GVT_SOURCE)) + +#ifdef CONFIG_DRM_USE_DYNAMIC_DEBUG +ccflags-y += -DDYNAMIC_DEBUG_MODULE +#endif diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index e07f4cfea63a..683e942a074e 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -265,3 +265,38 @@ void i915_params_free(struct i915_params *params) I915_PARAMS_FOR_EACH(FREE); #undef FREE } + +#ifdef DRM_USE_DYNAMIC_DEBUG +/* todo: needs DYNAMIC_DEBUG_MODULE in some cases */ + +unsigned long __gvt_debug; +EXPORT_SYMBOL(__gvt_debug); + +#define _help(key) "\t "" key ""\t: help for " key "\n" + +#define I915_GVT_CATEGORIES(name) \ + " Enable debug output via /sys/module/i915/parameters/" #name \ + ", where each bit enables a debug category.\n" \ + _help("gvt:cmd:") \ + _help("gvt:core:") \ + _help("gvt:dpy:") \ + _help("gvt:el:") \ + _help("gvt:irq:") \ + _help("gvt:mm:") \ + _help("gvt:mmio:") \ + _help("gvt:render:") \ + _help("gvt:sched:") + +DEFINE_DYNAMIC_DEBUG_CATEGORIES(debug_gvt, __gvt_debug, + I915_GVT_CATEGORIES(debug_gvt), + _DD_cat_("gvt:cmd:"), + _DD_cat_("gvt:core:"), + _DD_cat_("gvt:dpy:"), + _DD_cat_("gvt:el:"), + _DD_cat_("gvt:irq:"), + _DD_cat_("gvt:mm:"), + _DD_cat_("gvt:mmio:"), + _DD_cat_("gvt:render:"), + _DD_cat_("gvt:sched:")); + +#endif