drm/nouveau/fb: make use of M0203 routines for ram type determination

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

diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/base.c b/drivers/gpu/drm/nouveau/core/subdev/fb/base.c
index f009d8a..c866148 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/base.c
@@ -23,37 +23,30 @@
  */
 
 #include <subdev/bios.h>
-#include <subdev/bios/bit.h>
+#include <subdev/bios/M0203.h>
 
 #include "priv.h"
 
 int
 nouveau_fb_bios_memtype(struct nouveau_bios *bios)
 {
-       struct bit_entry M;
-       u8 ramcfg;
-
-       ramcfg = (nv_rd32(bios, 0x101000) & 0x0000003c) >> 2;
-       if (!bit_entry(bios, 'M', &M) && M.version == 2 && M.length >= 5) {
-               u16 table   = nv_ro16(bios, M.offset + 3);
-               u8  version = nv_ro08(bios, table + 0);
-               u8  header  = nv_ro08(bios, table + 1);
-               u8  record  = nv_ro08(bios, table + 2);
-               u8  entries = nv_ro08(bios, table + 3);
-               if (table && version == 0x10 && ramcfg < entries) {
-                       u16 entry = table + header + (ramcfg * record);
-                       switch (nv_ro08(bios, entry) & 0x0f) {
-                       case 0: return NV_MEM_TYPE_DDR2;
-                       case 1: return NV_MEM_TYPE_DDR3;
-                       case 2: return NV_MEM_TYPE_GDDR3;
-                       case 3: return NV_MEM_TYPE_GDDR5;
-                       default:
-                               break;
-                       }
-
+       const u8 ramcfg = (nv_rd32(bios, 0x101000) & 0x0000003c) >> 2;
+       struct nvbios_M0203E M0203E;
+       u8 ver, hdr;
+
+       if (nvbios_M0203Em(bios, ramcfg, &ver, &hdr, &M0203E)) {
+               switch (M0203E.type) {
+               case M0203E_TYPE_DDR2 : return NV_MEM_TYPE_DDR2;
+               case M0203E_TYPE_DDR3 : return NV_MEM_TYPE_DDR3;
+               case M0203E_TYPE_GDDR3: return NV_MEM_TYPE_GDDR3;
+               case M0203E_TYPE_GDDR5: return NV_MEM_TYPE_GDDR5;
+               default:
+                       nv_warn(bios, "M0203E type %02x\n", M0203E.type);
+                       return NV_MEM_TYPE_UNKNOWN;
                }
        }
 
+       nv_warn(bios, "M0203E not matched!\n");
        return NV_MEM_TYPE_UNKNOWN;
 }