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@xxxxxxxxx>
---
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
--
2.31.1
