drm/i915/display: move dmc snapshotting to new display snapshot

Convert dmc error state printing to new snapshot capture/print division.

v2: Rebase

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/9116319e7faceeed7695ee35e56fe001ddf94e11.1726151571.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_display_snapshot.c

@@ -7,6 +7,7 @@
 #include "intel_display_device.h"
 #include "intel_display_params.h"
 #include "intel_display_snapshot.h"
+#include "intel_dmc.h"
 #include "intel_overlay.h"
 
 struct intel_display_snapshot {
@@ -16,6 +17,7 @@ struct intel_display_snapshot {
 	struct intel_display_runtime_info runtime_info;
 	struct intel_display_params params;
 	struct intel_overlay_snapshot *overlay;
+	struct intel_dmc_snapshot *dmc;
 };
 
 struct intel_display_snapshot *intel_display_snapshot_capture(struct intel_display *display)
@@ -35,6 +37,7 @@ struct intel_display_snapshot *intel_display_snapshot_capture(struct intel_displ
 	intel_display_params_copy(&snapshot->params);
 
 	snapshot->overlay = intel_overlay_snapshot_capture(display);
+	snapshot->dmc = intel_dmc_snapshot_capture(display);
 
 	return snapshot;
 }
@@ -53,6 +56,7 @@ void intel_display_snapshot_print(const struct intel_display_snapshot *snapshot,
 	intel_display_params_dump(&snapshot->params, display->drm->driver->name, p);
 
 	intel_overlay_snapshot_print(snapshot->overlay, p);
+	intel_dmc_snapshot_print(snapshot->dmc, p);
 }
 
 void intel_display_snapshot_free(struct intel_display_snapshot *snapshot)
@@ -63,5 +67,6 @@ void intel_display_snapshot_free(struct intel_display_snapshot *snapshot)
 	intel_display_params_free(&snapshot->params);
 
 	kfree(snapshot->overlay);
+	kfree(snapshot->dmc);
 	kfree(snapshot);
 }

drivers/gpu/drm/i915/display/intel_dmc.c

@@ -1194,21 +1194,43 @@ void intel_dmc_fini(struct intel_display *display)
 	}
 }
 
-void intel_dmc_print_error_state(struct drm_printer *p,
-				 struct intel_display *display)
+struct intel_dmc_snapshot {
+	bool initialized;
+	bool loaded;
+	u32 version;
+};
+
+struct intel_dmc_snapshot *intel_dmc_snapshot_capture(struct intel_display *display)
 {
 	struct intel_dmc *dmc = display_to_dmc(display);
+	struct intel_dmc_snapshot *snapshot;
 
 	if (!HAS_DMC(display))
+		return NULL;
+
+	snapshot = kzalloc(sizeof(*snapshot), GFP_ATOMIC);
+	if (!snapshot)
+		return NULL;
+
+	snapshot->initialized = dmc;
+	snapshot->loaded = intel_dmc_has_payload(display);
+	if (dmc)
+		snapshot->version = dmc->version;
+
+	return snapshot;
+}
+
+void intel_dmc_snapshot_print(const struct intel_dmc_snapshot *snapshot, struct drm_printer *p)
+{
+	if (!snapshot)
 		return;
 
-	drm_printf(p, "DMC initialized: %s\n", str_yes_no(dmc));
-	drm_printf(p, "DMC loaded: %s\n",
-		   str_yes_no(intel_dmc_has_payload(display)));
-	if (dmc)
+	drm_printf(p, "DMC initialized: %s\n", str_yes_no(snapshot->initialized));
+	drm_printf(p, "DMC loaded: %s\n", str_yes_no(snapshot->loaded));
+	if (snapshot->initialized)
 		drm_printf(p, "DMC fw version: %d.%d\n",
-			   DMC_VERSION_MAJOR(dmc->version),
-			   DMC_VERSION_MINOR(dmc->version));
+			   DMC_VERSION_MAJOR(snapshot->version),
+			   DMC_VERSION_MINOR(snapshot->version));
 }
 
 static int intel_dmc_debugfs_status_show(struct seq_file *m, void *unused)

drivers/gpu/drm/i915/display/intel_dmc.h

@@ -11,6 +11,7 @@
 enum pipe;
 struct drm_printer;
 struct intel_display;
+struct intel_dmc_snapshot;
 
 void intel_dmc_init(struct intel_display *display);
 void intel_dmc_load_program(struct intel_display *display);
@@ -22,8 +23,9 @@ void intel_dmc_suspend(struct intel_display *display);
 void intel_dmc_resume(struct intel_display *display);
 bool intel_dmc_has_payload(struct intel_display *display);
 void intel_dmc_debugfs_register(struct intel_display *display);
-void intel_dmc_print_error_state(struct drm_printer *p,
-				 struct intel_display *display);
+
+struct intel_dmc_snapshot *intel_dmc_snapshot_capture(struct intel_display *display);
+void intel_dmc_snapshot_print(const struct intel_dmc_snapshot *snapshot, struct drm_printer *p);
 
 void assert_dmc_loaded(struct intel_display *display);
 

drivers/gpu/drm/i915/i915_gpu_error.c

@@ -41,7 +41,6 @@
 #include <drm/drm_print.h>
 
 #include "display/intel_display_snapshot.h"
-#include "display/intel_dmc.h"
 
 #include "gem/i915_gem_context.h"
 #include "gem/i915_gem_lmem.h"
@@ -871,8 +870,6 @@ static void __err_print_to_sgl(struct drm_i915_error_state_buf *m,
 
 	err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
 
-	intel_dmc_print_error_state(&p, &m->i915->display);
-
 	err_printf(m, "RPM wakelock: %s\n", str_yes_no(error->wakelock));
 	err_printf(m, "PM suspended: %s\n", str_yes_no(error->suspended));