[PATCH 1/2] drm/i915/display_wa: Add helpers to check wa

[Ankit Nautiyal]

Introduce a generic helper to check display workarounds using an enum.

Convert Wa_16023588340 to use the new interface, simplifying WA checks
and making future additions easier.

v2: Use drm_WARN instead of MISSING_CASE and simplify intel_display_wa
macro. (Jani)

Suggested-by: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_wa.c | 15 +++++++++++++++
 drivers/gpu/drm/i915/display/intel_display_wa.h |  9 +++++++++
 drivers/gpu/drm/i915/display/intel_fbc.c        |  2 +-
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.c b/drivers/gpu/drm/i915/display/intel_display_wa.c
index f57280e9d041..f5e8d58d9a68 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.c
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.c
@@ -3,6 +3,8 @@
  * Copyright © 2023 Intel Corporation
  */
 
+#include "drm/drm_print.h"
+
 #include "i915_reg.h"
 #include "intel_de.h"
 #include "intel_display_core.h"
@@ -39,3 +41,16 @@ void intel_display_wa_apply(struct intel_display *display)
 	else if (DISPLAY_VER(display) == 11)
 		gen11_display_wa_apply(display);
 }
+
+bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa)
+{
+	switch (wa) {
+	case INTEL_DISPLAY_WA_16023588340:
+		return intel_display_needs_wa_16023588340(display);
+	default:
+		drm_WARN(display->drm, 1, "Missing Wa number: %d\n", wa);
+		break;
+	}
+
+	return false;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.h b/drivers/gpu/drm/i915/display/intel_display_wa.h
index babd9d16603d..146ee70d66f7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.h
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.h
@@ -21,4 +21,13 @@ static inline bool intel_display_needs_wa_16023588340(struct intel_display *disp
 bool intel_display_needs_wa_16023588340(struct intel_display *display);
 #endif
 
+enum intel_display_wa {
+	INTEL_DISPLAY_WA_16023588340,
+};
+
+bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa);
+
+#define intel_display_wa(__display, __wa) \
+	__intel_display_wa((__display), INTEL_DISPLAY_WA_##__wa)
+
 #endif
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 6e26cb4c5724..e2e03af520b2 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1464,7 +1464,7 @@ static int intel_fbc_check_plane(struct intel_atomic_state *state,
 		return 0;
 	}
 
-	if (intel_display_needs_wa_16023588340(display)) {
+	if (intel_display_wa(display, 16023588340)) {
 		plane_state->no_fbc_reason = "Wa_16023588340";
 		return 0;
 	}
-- 
2.45.2