drm/nouveau/ltc/gm107-: decode interrupt status to human-readable strings

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gf100.c

@@ -23,7 +23,6 @@
  */
 #include "priv.h"
 
-#include <core/enum.h>
 #include <subdev/fb.h>
 #include <subdev/timer.h>
 
@@ -71,7 +70,7 @@ gf100_ltc_zbc_clear_depth(struct nvkm_ltc *ltc, int i, const u32 depth)
 	nvkm_wr32(device, 0x17ea58, depth);
 }
 
-static const struct nvkm_bitfield
+const struct nvkm_bitfield
 gf100_ltc_lts_intr_name[] = {
 	{ 0x00000001, "IDLE_ERROR_IQ" },
 	{ 0x00000002, "IDLE_ERROR_CBC" },

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gm107.c

@@ -74,12 +74,16 @@ gm107_ltc_intr_lts(struct nvkm_ltc *ltc, int c, int s)
 	struct nvkm_subdev *subdev = &ltc->subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 base = 0x140400 + (c * 0x2000) + (s * 0x200);
-	u32 stat = nvkm_rd32(device, base + 0x00c);
+	u32 intr = nvkm_rd32(device, base + 0x00c);
+	u16 stat = intr & 0x0000ffff;
+	char msg[128];
 
 	if (stat) {
-		nvkm_error(subdev, "LTC%d_LTS%d: %08x\n", c, s, stat);
-		nvkm_wr32(device, base + 0x00c, stat);
+		nvkm_snprintbf(msg, sizeof(msg), gf100_ltc_lts_intr_name, stat);
+		nvkm_error(subdev, "LTC%d_LTS%d: %08x [%s]\n", c, s, intr, msg);
 	}
+
+	nvkm_wr32(device, base + 0x00c, intr);
 }
 
 void

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/priv.h

@@ -2,6 +2,7 @@
 #define __NVKM_LTC_PRIV_H__
 #define nvkm_ltc(p) container_of((p), struct nvkm_ltc, subdev)
 #include <subdev/ltc.h>
+#include <core/enum.h>
 
 int nvkm_ltc_new_(const struct nvkm_ltc_func *, struct nvkm_device *,
 		  int index, struct nvkm_ltc **);
@@ -31,6 +32,7 @@ void gf100_ltc_zbc_clear_color(struct nvkm_ltc *, int, const u32[4]);
 void gf100_ltc_zbc_clear_depth(struct nvkm_ltc *, int, const u32);
 void gf100_ltc_invalidate(struct nvkm_ltc *);
 void gf100_ltc_flush(struct nvkm_ltc *);
+extern const struct nvkm_bitfield gf100_ltc_lts_intr_name[];
 
 void gm107_ltc_intr(struct nvkm_ltc *);
 void gm107_ltc_cbc_clear(struct nvkm_ltc *, u32, u32);