drm/nouveau/disp/nv50-gt21x: remove workaround for dp->tmds hotplug issues

This shouldn't have been needed ever since we started executing the
DisableLT script when shutting down heads.

Testing of the board this was originally written for seems to agree.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c

@@ -316,31 +316,6 @@ exec_clkcmp(struct nv50_disp *disp, int head, int id, u32 pclk, u32 *conf)
 	return outp;
 }
 
-/* If programming a TMDS output on a SOR that can also be configured for
- * DisplayPort, make sure NV50_SOR_DP_CTRL_ENABLE is forced off.
- *
- * It looks like the VBIOS TMDS scripts make an attempt at this, however,
- * the VBIOS scripts on at least one board I have only switch it off on
- * link 0, causing a blank display if the output has previously been
- * programmed for DisplayPort.
- */
-static void
-nv50_disp_intr_unk40_0_tmds(struct nv50_disp *disp,
-			    struct dcb_output *outp)
-{
-	struct nvkm_device *device = disp->base.engine.subdev.device;
-	struct nvkm_bios *bios = device->bios;
-	const int link = !(outp->sorconf.link & 1);
-	const int   or = ffs(outp->or) - 1;
-	const u32 loff = (or * 0x800) + (link * 0x80);
-	const u16 mask = (outp->sorconf.link << 6) | outp->or;
-	struct dcb_output match;
-	u8  ver, hdr;
-
-	if (dcb_outp_match(bios, DCB_OUTPUT_DP, mask, &ver, &hdr, &match))
-		nvkm_mask(device, 0x61c10c + loff, 0x00000001, 0x00000000);
-}
-
 static void
 nv50_disp_intr_unk40_0(struct nv50_disp *disp, int head)
 {
@@ -353,8 +328,6 @@ nv50_disp_intr_unk40_0(struct nv50_disp *disp, int head)
 	if (!outp)
 		return;
 
-	if (outp->info.location == 0 && outp->info.type == DCB_OUTPUT_TMDS)
-		nv50_disp_intr_unk40_0_tmds(disp, &outp->info);
 	nv50_disp_dptmds_war_3(disp, &outp->info);
 }