[Intel-gfx] [RFC PATCH 2/4] drm/i915/display: Dump also display parameters into GPU error dump

[Jouni Högander]

GPU error dump contained all module parameters. If we are moving
display parameters to intel_display_params.[ch] they are not dumped
into GPU error dump. This patch is adding moved display parameters
back to GPU error dump.

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 .../drm/i915/display/intel_display_params.c   | 52 +++++++++++++++++++
 .../drm/i915/display/intel_display_params.h   |  3 ++
 drivers/gpu/drm/i915/i915_gpu_error.c         |  3 ++
 drivers/gpu/drm/i915/i915_gpu_error.h         |  2 +
 4 files changed, 60 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_params.c b/drivers/gpu/drm/i915/display/intel_display_params.c
index 530cc80d0928..c782cb7f11cb 100644
--- a/drivers/gpu/drm/i915/display/intel_display_params.c
+++ b/drivers/gpu/drm/i915/display/intel_display_params.c
@@ -50,6 +50,58 @@ struct intel_display_params intel_display_modparams __read_mostly = {
  * debugfs mode to 0.
  */
 
+static void _param_print_bool(struct drm_printer *p, const char *driver_name,
+			      const char *name, bool val)
+{
+	drm_printf(p, "%s.%s=%s\n", driver_name, name, str_yes_no(val));
+}
+
+static void _param_print_int(struct drm_printer *p, const char *driver_name,
+			     const char *name, int val)
+{
+	drm_printf(p, "%s.%s=%d\n", driver_name, name, val);
+}
+
+static void _param_print_uint(struct drm_printer *p, const char *driver_name,
+			      const char *name, unsigned int val)
+{
+	drm_printf(p, "%s.%s=%u\n", driver_name, name, val);
+}
+
+static void _param_print_ulong(struct drm_printer *p, const char *driver_name,
+			       const char *name, unsigned long val)
+{
+	drm_printf(p, "%s.%s=%lu\n", driver_name, name, val);
+}
+
+static void _param_print_charp(struct drm_printer *p, const char *driver_name,
+			       const char *name, const char *val)
+{
+	drm_printf(p, "%s.%s=%s\n", driver_name, name, val);
+}
+
+#define _param_print(p, driver_name, name, val)			\
+	_Generic(val,						\
+		 bool : _param_print_bool,			\
+		 int : _param_print_int,			\
+		 unsigned int : _param_print_uint,		\
+		 unsigned long : _param_print_ulong,		\
+		 char * : _param_print_charp)(p, driver_name, name, val)
+
+/**
+ * intel_display_params_dump - dump intel display modparams
+ * @i915: i915 device
+ * @p: the &drm_printer
+ *
+ * Pretty printer for i915 modparams.
+ */
+void intel_display_params_dump(struct drm_i915_private *i915, struct drm_printer *p)
+{
+#define PRINT(T, x, ...) _param_print(p, i915->drm.driver->name, #x, i915->display.params.x);
+	INTEL_DISPLAY_PARAMS_FOR_EACH(PRINT);
+#undef PRINT
+}
+
 static void _param_dup_charp(char **valp)
 {
 	*valp = kstrdup(*valp, GFP_ATOMIC);
diff --git a/drivers/gpu/drm/i915/display/intel_display_params.h b/drivers/gpu/drm/i915/display/intel_display_params.h
index 4c241f265c10..9bde1823da4c 100644
--- a/drivers/gpu/drm/i915/display/intel_display_params.h
+++ b/drivers/gpu/drm/i915/display/intel_display_params.h
@@ -28,6 +28,7 @@
 #include <linux/cache.h> /* for __read_mostly */
 
 struct drm_printer;
+struct drm_i915_private;
 
 /*
  * Invoke param, a function-like macro, for each intel display param, with
@@ -51,6 +52,8 @@ struct intel_display_params {
 
 extern struct intel_display_params intel_display_modparams __read_mostly;
 
+void intel_display_params_dump(struct drm_i915_private *i915,
+			       struct drm_printer *p);
 void intel_display_params_copy(struct intel_display_params *dest,
 			       const struct intel_display_params *src);
 void intel_display_params_free(struct intel_display_params *params);
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index b4e31e59c799..084235e87904 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -660,6 +660,7 @@ static void err_print_params(struct drm_i915_error_state_buf *m,
 	struct drm_printer p = i915_error_printer(m);
 
 	i915_params_dump(params, &p);
+	intel_display_params_dump(m->i915, &p);
 }
 
 static void err_print_pciid(struct drm_i915_error_state_buf *m,
@@ -1027,6 +1028,7 @@ static void i915_vma_coredump_free(struct i915_vma_coredump *vma)
 static void cleanup_params(struct i915_gpu_coredump *error)
 {
 	i915_params_free(&error->params);
+	intel_display_params_free(&error->display_params);
 }
 
 static void cleanup_uc(struct intel_uc_coredump *uc)
@@ -1988,6 +1990,7 @@ static void capture_gen(struct i915_gpu_coredump *error)
 	error->suspend_count = i915->suspend_count;
 
 	i915_params_copy(&error->params, &i915->params);
+	intel_display_params_copy(&error->display_params, &i915->display.params);
 	memcpy(&error->device_info,
 	       INTEL_INFO(i915),
 	       sizeof(error->device_info));
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.h b/drivers/gpu/drm/i915/i915_gpu_error.h
index 9f5971f5e980..4ce227f7e1e1 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.h
+++ b/drivers/gpu/drm/i915/i915_gpu_error.h
@@ -15,6 +15,7 @@
 #include <drm/drm_mm.h>
 
 #include "display/intel_display_device.h"
+#include "display/intel_display_params.h"
 #include "gt/intel_engine.h"
 #include "gt/intel_gt_types.h"
 #include "gt/uc/intel_uc_fw.h"
@@ -214,6 +215,7 @@ struct i915_gpu_coredump {
 	struct intel_display_runtime_info display_runtime_info;
 	struct intel_driver_caps driver_caps;
 	struct i915_params params;
+	struct intel_display_params display_params;
 
 	struct intel_overlay_error_state *overlay;
 
-- 
2.34.1