[Intel-gfx] [PATCH] drm/i915: add plural() helper for logging plurals

[Jani Nikula]

Add a helper instead of open coding the plurals in debug logs. Also
fixes the case for "0 display pipes available."

Signed-off-by: Jani Nikula <jani.nikula at intel.com>

---

I stumbled upon the pipes one while working on ->num_pipes. I honestly
thought we'd have more users than this, but to my surprise couldn't find
any. Perhaps this is not worth it after all.
---
 drivers/gpu/drm/i915/display/intel_display.c | 2 +-
 drivers/gpu/drm/i915/i915_utils.h            | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e661e2099118..c4bfd80a1cfa 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -16215,7 +16215,7 @@ int intel_modeset_init(struct drm_device *dev)
 
 	DRM_DEBUG_KMS("%d display pipe%s available.\n",
 		      INTEL_INFO(dev_priv)->num_pipes,
-		      INTEL_INFO(dev_priv)->num_pipes > 1 ? "s" : "");
+		      plural(INTEL_INFO(dev_priv)->num_pipes));
 
 	for_each_pipe(dev_priv, pipe) {
 		ret = intel_crtc_init(dev_priv, pipe);
diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h
index 562f756da421..dc34dfe18a1e 100644
--- a/drivers/gpu/drm/i915/i915_utils.h
+++ b/drivers/gpu/drm/i915/i915_utils.h
@@ -410,6 +410,11 @@ static inline const char *enableddisabled(bool v)
 	return v ? "enabled" : "disabled";
 }
 
+static inline const char *plural(long v)
+{
+	return v == 1 ? "" : "s";
+}
+
 static inline void add_taint_for_CI(unsigned int taint)
 {
 	/*
-- 
2.20.1