drm/nv50: move dp_set_tmds() function to happen in the last display irq

It seems on some chipsets that doing this from the 0x20 handler causes the
display engine to not ever signal the final 0x40 stage.

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

drivers/gpu/drm/nouveau/nv50_display.c

@@ -788,37 +788,6 @@ nv50_display_unk20_dp_hack(struct drm_device *dev, struct dcb_entry *dcb)
 	}
 }
 
-/* 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_display_unk20_dp_set_tmds(struct drm_device *dev, struct dcb_entry *dcb)
-{
-	int or = ffs(dcb->or) - 1, link = !(dcb->dpconf.sor.link & 1);
-	struct drm_encoder *encoder;
-	u32 tmp;
-
-	if (dcb->type != OUTPUT_TMDS)
-		return;
-
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
-
-		if (nv_encoder->dcb->type == OUTPUT_DP &&
-		    nv_encoder->dcb->or & (1 << or)) {
-			tmp  = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link));
-			tmp &= ~NV50_SOR_DP_CTRL_ENABLED;
-			nv_wr32(dev, NV50_SOR_DP_CTRL(or, link), tmp);
-			break;
-		}
-	}
-}
-
 static void
 nv50_display_unk20_handler(struct drm_device *dev)
 {
@@ -917,7 +886,6 @@ nv50_display_unk20_handler(struct drm_device *dev)
 	nouveau_bios_run_display_table(dev, dcb, script, pclk);
 
 	nv50_display_unk20_dp_hack(dev, dcb);
-	nv50_display_unk20_dp_set_tmds(dev, dcb);
 
 	if (dcb->type != OUTPUT_ANALOG) {
 		tmp = nv_rd32(dev, NV50_PDISPLAY_SOR_CLK_CTRL2(or));
@@ -938,6 +906,37 @@ nv50_display_unk20_handler(struct drm_device *dev)
 	nv_wr32(dev, 0x610030, 0x80000000);
 }
 
+/* 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_display_unk40_dp_set_tmds(struct drm_device *dev, struct dcb_entry *dcb)
+{
+	int or = ffs(dcb->or) - 1, link = !(dcb->dpconf.sor.link & 1);
+	struct drm_encoder *encoder;
+	u32 tmp;
+
+	if (dcb->type != OUTPUT_TMDS)
+		return;
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
+
+		if (nv_encoder->dcb->type == OUTPUT_DP &&
+		    nv_encoder->dcb->or & (1 << or)) {
+			tmp  = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link));
+			tmp &= ~NV50_SOR_DP_CTRL_ENABLED;
+			nv_wr32(dev, NV50_SOR_DP_CTRL(or, link), tmp);
+			break;
+		}
+	}
+}
+
 static void
 nv50_display_unk40_handler(struct drm_device *dev)
 {
@@ -952,6 +951,8 @@ nv50_display_unk40_handler(struct drm_device *dev)
 		goto ack;
 
 	nouveau_bios_run_display_table(dev, dcb, script, -pclk);
+	nv50_display_unk40_dp_set_tmds(dev, dcb);
+
 ack:
 	nv_wr32(dev, NV50_PDISPLAY_INTR_1, NV50_PDISPLAY_INTR_1_CLK_UNK40);
 	nv_wr32(dev, 0x610030, 0x80000000);