drm/nouveau/bios: parse 8.1 Gbps DP link rate

From DCB 4.1 spec.

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

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c
index 8304b80..a8d5d67 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c
@@ -143,16 +143,19 @@ dcb_outp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
                        switch (outp->type) {
                        case DCB_OUTPUT_DP:
                                switch (conf & 0x00e00000) {
-                               case 0x00000000:
+                               case 0x00000000: /* 1.62 */
                                        outp->dpconf.link_bw = 0x06;
                                        break;
-                               case 0x00200000:
+                               case 0x00200000: /* 2.7 */
                                        outp->dpconf.link_bw = 0x0a;
                                        break;
-                               case 0x00400000:
-                               default:
+                               case 0x00400000: /* 5.4 */
                                        outp->dpconf.link_bw = 0x14;
                                        break;
+                               case 0x00600000: /* 8.1 */
+                               default:
+                                       outp->dpconf.link_bw = 0x1e;
+                                       break;
                                }
 
                                switch ((conf & 0x0f000000) >> 24) {