commit acfb9973a0d1e5dd14c40464d9a20945cd2ac02e
author Michal Wajdeczko <michal.wajdeczko@intel.com> Tue Dec 19 11:43:46 2017 +0000
committer Chris Wilson <chris@chris-wilson.co.uk> Tue Dec 19 15:07:08 2017 +0000
tree f434c874ebe5433e8ebd858269c117f5353ef598
parent eb10ed9a9e1ecacafab5535c86b62061b39360e5

drm/i915: Add pretty printer for modparams

We dump modparams in few places (debugfs, gpu_error) using different
functions. Lets add reusable function to avoid code duplication.

add/remove: 1/0 grow/shrink: 0/2 up/down: 1096/-2339 (-1243)
Function                                     old     new   delta
i915_params_dump                               -    1096   +1096
i915_capabilities                           1353     185   -1168
i915_error_state_to_str                     5507    4336   -1171
Total: Before=1285716, After=1284473, chg -0.10%

v2: use forward decl rather than include (Chris)

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171219114346.26308-3-michal.wajdeczko@intel.com

drivers/gpu/drm/i915/i915_params.c

diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 8dfea03..b5f3eb4 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -22,6 +22,8 @@
  * IN THE SOFTWARE.
  */
 
+#include <drm/drm_print.h>
+
 #include "i915_params.h"
 #include "i915_drv.h"
 
@@ -172,3 +174,34 @@ i915_param_named(enable_dpcd_backlight, bool, 0600,
 
 i915_param_named(enable_gvt, bool, 0400,
 	"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
+
+static __always_inline void _print_param(struct drm_printer *p,
+					 const char *name,
+					 const char *type,
+					 const void *x)
+{
+	if (!__builtin_strcmp(type, "bool"))
+		drm_printf(p, "i915.%s=%s\n", name, yesno(*(const bool *)x));
+	else if (!__builtin_strcmp(type, "int"))
+		drm_printf(p, "i915.%s=%d\n", name, *(const int *)x);
+	else if (!__builtin_strcmp(type, "unsigned int"))
+		drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x);
+	else if (!__builtin_strcmp(type, "char *"))
+		drm_printf(p, "i915.%s=%s\n", name, *(const char **)x);
+	else
+		BUILD_BUG();
+}
+
+/**
+ * i915_params_dump - dump i915 modparams
+ * @params: i915 modparams
+ * @p: the &drm_printer
+ *
+ * Pretty printer for i915 modparams.
+ */
+void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
+{
+#define PRINT(T, x, ...) _print_param(p, #x, #T, &params->x);
+	I915_PARAMS_FOR_EACH(PRINT);
+#undef PRINT
+}