drm/nouveau/disp/dp: add support for hbr3

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Link: https://gitlab.freedesktop.org/drm/nouveau/-/merge_requests/17

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

@@ -588,7 +588,7 @@ nvkm_dp_enable(struct nvkm_dp *dp, bool enable)
 		}
 
 		if (!nvkm_rdaux(aux, DPCD_RC00_DPCD_REV, dp->dpcd, sizeof(dp->dpcd))) {
-			const u8 rates[] = { 0x14, 0x0a, 0x06, 0 };
+			const u8 rates[] = { 0x1e, 0x14, 0x0a, 0x06, 0 };
 			const u8 *rate;
 			int rate_max;
 

drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h

@@ -24,7 +24,7 @@ struct nvkm_dp {
 
 	struct {
 		u32 rate;
-	} rate[3];
+	} rate[4];
 	int rates;
 	int links;