drm/nouveau/disp/dp: remove DP_PWR method

This hasn't been used since atomic.

We may want to re-implement "fast" DPMS at some point, but for now,
this just gets in the way.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvif/cl5070.h

@@ -33,7 +33,6 @@ struct nv50_disp_mthd_v1 {
 #define NV50_DISP_MTHD_V1_SOR_HDA_ELD                                      0x21
 #define NV50_DISP_MTHD_V1_SOR_HDMI_PWR                                     0x22
 #define NV50_DISP_MTHD_V1_SOR_LVDS_SCRIPT                                  0x23
-#define NV50_DISP_MTHD_V1_SOR_DP_PWR                                       0x24
 #define NV50_DISP_MTHD_V1_SOR_DP_MST_LINK                                  0x25
 #define NV50_DISP_MTHD_V1_SOR_DP_MST_VCPI                                  0x26
 #define NV50_DISP_MTHD_V1_PIOR_PWR                                         0x30
@@ -88,12 +87,6 @@ struct nv50_disp_sor_lvds_script_v0 {
 	__u8  pad04[4];
 };
 
-struct nv50_disp_sor_dp_pwr_v0 {
-	__u8  version;
-	__u8  state;
-	__u8  pad02[6];
-};
-
 struct nv50_disp_sor_dp_mst_link_v0 {
 	__u8  version;
 	__u8  state;

drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c

@@ -124,30 +124,6 @@ nv50_disp_root_mthd_(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 			return ret;
 	}
 		break;
-	case NV50_DISP_MTHD_V1_SOR_DP_PWR: {
-		struct nvkm_output_dp *outpdp = nvkm_output_dp(outp);
-		union {
-			struct nv50_disp_sor_dp_pwr_v0 v0;
-		} *args = data;
-		int ret = -ENOSYS;
-		nvif_ioctl(object, "disp sor dp pwr size %d\n", size);
-		if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
-			nvif_ioctl(object, "disp sor dp pwr vers %d state %d\n",
-				   args->v0.version, args->v0.state);
-			if (args->v0.state == 0) {
-				nvkm_notify_put(&outpdp->irq);
-				outpdp->func->lnk_pwr(outpdp, 0);
-				atomic_set(&outpdp->lt.done, 0);
-				return 0;
-			} else
-			if (args->v0.state != 0) {
-				nvkm_output_dp_train(&outpdp->base, 0);
-				return 0;
-			}
-		} else
-			return ret;
-	}
-		break;
 	case NV50_DISP_MTHD_V1_SOR_DP_MST_LINK: {
 		struct nvkm_output_dp *outpdp = nvkm_output_dp(outp);
 		union {