drm/nve0/fb/gddr5: yet another random 10f200 bit

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

drivers/gpu/drm/nouveau/core/include/subdev/bios/ramcfg.h

@@ -40,6 +40,7 @@ struct nvbios_ramcfg {
 	unsigned ramcfg_11_08_04:1;
 	unsigned ramcfg_11_08_08:1;
 	unsigned ramcfg_11_08_10:1;
+	unsigned ramcfg_11_08_20:1;
 	unsigned ramcfg_11_09:8;
 
 	unsigned timing[11];

drivers/gpu/drm/nouveau/core/subdev/bios/rammap.c

@@ -162,6 +162,7 @@ nvbios_rammapSp(struct nouveau_bios *bios, u32 data,
 		p->ramcfg_11_08_04 = (nv_ro08(bios, data + 0x08) & 0x04) >> 2;
 		p->ramcfg_11_08_08 = (nv_ro08(bios, data + 0x08) & 0x08) >> 3;
 		p->ramcfg_11_08_10 = (nv_ro08(bios, data + 0x08) & 0x10) >> 4;
+		p->ramcfg_11_08_20 = (nv_ro08(bios, data + 0x08) & 0x20) >> 5;
 		p->ramcfg_11_09    = (nv_ro08(bios, data + 0x09) & 0xff) >> 0;
 		break;
 	default:

drivers/gpu/drm/nouveau/core/subdev/fb/ramnve0.c

@@ -476,6 +476,14 @@ nve0_ram_calc_gddr5(struct nouveau_fb *pfb, u32 freq)
 	ram_mask(fuc, 0x10f2cc, 0xffffffff, next->bios.timing[8]);
 	ram_mask(fuc, 0x10f2e8, 0xffffffff, next->bios.timing[9]);
 
+	data = mask = 0x00000000;
+	if (NOTE00(ramcfg_08_20)) {
+		if (next->bios.ramcfg_11_08_20)
+			data |= 0x01000000;
+		mask |= 0x01000000;
+	}
+	ram_mask(fuc, 0x10f200, mask, data);
+
 	data = mask = 0x00000000;
 	if (NOTE00(ramcfg_02_03 != 0)) {
 		data |= (next->bios.ramcfg_11_02_03) << 8;