drm/nv50: use alternate source of SOR_MODE_CTRL for DP hack

[safe/jmp/linux-2.6] / drivers / gpu / drm / nouveau / nv50_sor.c

diff --git a/drivers/gpu/drm/nouveau/nv50_sor.c b/drivers/gpu/drm/nouveau/nv50_sor.c
index c2fff54..812778d 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_sor.c
+++ b/drivers/gpu/drm/nouveau/nv50_sor.c
@@ -211,7 +211,7 @@ nv50_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
                        mode_ctl = 0x0200;
                break;
        case OUTPUT_DP:
-               mode_ctl |= 0x00050000;
+               mode_ctl |= (nv_encoder->dp.mc_unknown << 16);
                if (nv_encoder->dcb->sorconf.link & 1)
                        mode_ctl |= 0x00000800;
                else
@@ -319,5 +319,28 @@ nv50_sor_create(struct drm_device *dev, struct dcb_entry *entry)
        encoder->possible_crtcs = entry->heads;
        encoder->possible_clones = 0;
 
+       if (nv_encoder->dcb->type == OUTPUT_DP) {
+               int or = nv_encoder->or, link = !(entry->dpconf.sor.link & 1);
+               uint32_t tmp;
+
+               tmp = nv_rd32(dev, 0x61c700 + (or * 0x800));
+
+               switch ((tmp & 0x00000f00) >> 8) {
+               case 8:
+               case 9:
+                       nv_encoder->dp.mc_unknown = (tmp & 0x000f0000) >> 16;
+                       tmp = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link));
+                       nv_encoder->dp.unk0 = tmp & 0x000001fc;
+                       tmp = nv_rd32(dev, NV50_SOR_DP_UNK128(or, link));
+                       nv_encoder->dp.unk1 = tmp & 0x010f7f3f;
+                       break;
+               default:
+                       break;
+               }
+
+               if (!nv_encoder->dp.mc_unknown)
+                       nv_encoder->dp.mc_unknown = 5;
+       }
+
        return 0;
 }