drm/nouveau/bios/rammap: Parse perf mode as if it's a rammap entry

Some of the bits in there are similar to the bits in the gt215 rammap.
Signed-off-by: Roy Spliet <rspliet@eclipso.eu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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

@@ -6,6 +6,11 @@ struct nvbios_ramcfg {
 	unsigned rammap_min;
 	unsigned rammap_max;
 	union {
+		struct {
+			unsigned rammap_00_16_20:1;
+			unsigned rammap_00_16_40:1;
+			unsigned rammap_00_17_02:1;
+		};
 		struct {
 			unsigned rammap_10_04_02:1;
 			unsigned rammap_10_04_08:1;

drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/rammap.h

@@ -7,6 +7,8 @@ u32 nvbios_rammapTe(struct nvkm_bios *, u8 *ver, u8 *hdr,
 
 u32 nvbios_rammapEe(struct nvkm_bios *, int idx,
 		    u8 *ver, u8 *hdr, u8 *cnt, u8 *len);
+u32 nvbios_rammapEp_from_perf(struct nvkm_bios *bios, u32 data, u8 size,
+		    struct nvbios_ramcfg *p);
 u32 nvbios_rammapEp(struct nvkm_bios *, int idx,
 		    u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ramcfg *);
 u32 nvbios_rammapEm(struct nvkm_bios *, u16 mhz,

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

@@ -72,6 +72,21 @@ nvbios_rammapEe(struct nvkm_bios *bios, int idx,
 	return 0x0000;
 }
 
+/* Pretend a performance mode is also a rammap entry, helps coalesce entries
+ * later on */
+u32
+nvbios_rammapEp_from_perf(struct nvkm_bios *bios, u32 data, u8 size,
+		struct nvbios_ramcfg *p)
+{
+	memset(p, 0x00, sizeof(*p));
+
+	p->rammap_00_16_20 = (nv_ro08(bios, data + 0x16) & 0x20) >> 5;
+	p->rammap_00_16_40 = (nv_ro08(bios, data + 0x16) & 0x40) >> 6;
+	p->rammap_00_17_02 = (nv_ro08(bios, data + 0x17) & 0x02) >> 1;
+
+	return data;
+}
+
 u32
 nvbios_rammapEp(struct nvkm_bios *bios, int idx,
 		u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ramcfg *p)

drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv50.c

@@ -169,6 +169,8 @@ nv50_ram_calc(struct nvkm_fb *pfb, u32 freq)
 		}
 	} while (perfE.memory < freq);
 
+	nvbios_rammapEp_from_perf(bios, data, hdr, &next->bios);
+
 	/* locate specific data set for the attached memory */
 	strap = nvbios_ramcfg_index(nv_subdev(pfb));
 	if (strap >= cnt) {