union {
                struct nv50_disp_sor_hdmi_pwr_v0 v0;
        } *args = data;
+       struct packed_hdmi_infoframe avi_infoframe;
+       struct packed_hdmi_infoframe vendor_infoframe;
        u32 ctrl;
        int ret = -ENOSYS;
 
                    + args->v0.vendor_infoframe_length) < size)
                return -E2BIG;
 
+       pack_hdmi_infoframe(&avi_infoframe,
+                           data,
+                           args->v0.avi_infoframe_length);
+
+       pack_hdmi_infoframe(&vendor_infoframe,
+                           data + args->v0.avi_infoframe_length,
+                           args->v0.vendor_infoframe_length);
+
        if (!(ctrl & 0x40000000)) {
                nvkm_mask(device, 0x616798 + hoff, 0x40000000, 0x00000000);
+               nvkm_mask(device, 0x690100 + hdmi, 0x00000001, 0x00000000);
                nvkm_mask(device, 0x6900c0 + hdmi, 0x00000001, 0x00000000);
                nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000000);
                return 0;
 
        /* AVI InfoFrame */
        nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000000);
-       nvkm_wr32(device, 0x690008 + hdmi, 0x000d0282);
-       nvkm_wr32(device, 0x69000c + hdmi, 0x0000006f);
-       nvkm_wr32(device, 0x690010 + hdmi, 0x00000000);
-       nvkm_wr32(device, 0x690014 + hdmi, 0x00000000);
-       nvkm_wr32(device, 0x690018 + hdmi, 0x00000000);
-       nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000001);
+       if (args->v0.avi_infoframe_length) {
+               nvkm_wr32(device, 0x690008 + hdmi, avi_infoframe.header);
+               nvkm_wr32(device, 0x69000c + hdmi, avi_infoframe.subpack0_low);
+               nvkm_wr32(device, 0x690010 + hdmi, avi_infoframe.subpack0_high);
+               nvkm_wr32(device, 0x690014 + hdmi, avi_infoframe.subpack1_low);
+               nvkm_wr32(device, 0x690018 + hdmi, avi_infoframe.subpack1_high);
+               nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000001);
+       }
+
+       /* GENERIC(?) / Vendor InfoFrame? */
+       nvkm_mask(device, 0x690100 + hdmi, 0x00010001, 0x00000000);
+       if (args->v0.vendor_infoframe_length) {
+               nvkm_wr32(device, 0x690108 + hdmi, vendor_infoframe.header);
+               nvkm_wr32(device, 0x69010c + hdmi, vendor_infoframe.subpack0_low);
+               nvkm_wr32(device, 0x690110 + hdmi, vendor_infoframe.subpack0_high);
+               /* Is there a second (or further?) set of subpack registers here? */
+               nvkm_mask(device, 0x690100 + hdmi, 0x00000001, 0x00000001);
+       }
+
 
        /* ??? InfoFrame? */
        nvkm_mask(device, 0x6900c0 + hdmi, 0x00000001, 0x00000000);