drm/nouveau/timer: re-introduce nvkm_wait_xsec macros

Reintroduce macros allowing us to test a register against a certain
mask, since this is the most common usage pattern for the more generic
nvkm_xsec macros and makes the code more concise and readable.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/subdev/timer.h

@@ -59,6 +59,16 @@ void nvkm_timer_alarm_cancel(struct nvkm_timer *, struct nvkm_alarm *);
 #define nvkm_usec(d,u,cond...) nvkm_nsec((d), (u) * 1000, ##cond)
 #define nvkm_msec(d,m,cond...) nvkm_usec((d), (m) * 1000, ##cond)
 
+#define nvkm_wait_nsec(d,n,addr,mask,data)                                     \
+	nvkm_nsec(d, n,                                                        \
+		if ((nvkm_rd32(d, (addr)) & (mask)) == (data))                 \
+			break;                                                 \
+		)
+#define nvkm_wait_usec(d,u,addr,mask,data)                                     \
+	nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data))
+#define nvkm_wait_msec(d,m,addr,mask,data)                                     \
+	nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data))
+
 int nv04_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
 int nv40_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
 int nv41_timer_new(struct nvkm_device *, int, struct nvkm_timer **);