Commit c70c41e8 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

drm/nv50: hopefully handle the DDR2/DDR3 memtype detection somewhat better



M version 2 appears to have a table with some form of memory type info
available.

NVIDIA appear to ignore the table information except for this DDR2/DDR3
case (which has the same value in 0x100714).  My guess is this is due to
some of the supported memory types not being represented in the table.
Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 1072856a
......@@ -909,6 +909,7 @@ extern int nouveau_mem_init_agp(struct drm_device *);
extern int nouveau_mem_reset_agp(struct drm_device *);
extern void nouveau_mem_close(struct drm_device *);
extern bool nouveau_mem_flags_valid(struct drm_device *, u32 tile_flags);
extern int nouveau_mem_vbios_type(struct drm_device *);
extern struct nouveau_tile_reg *nv10_mem_set_tiling(
struct drm_device *dev, uint32_t addr, uint32_t size,
uint32_t pitch, uint32_t flags);
......
......@@ -683,6 +683,29 @@ nouveau_mem_timing_fini(struct drm_device *dev)
}
}
int
nouveau_mem_vbios_type(struct drm_device *dev)
{
struct bit_entry M;
u8 ramcfg = (nv_rd32(dev, 0x101000) & 0x0000003c) >> 2;
if (!bit_table(dev, 'M', &M) || M.version != 2 || M.length < 5) {
u8 *table = ROMPTR(dev, M.data[3]);
if (table && table[0] == 0x10 && ramcfg < table[3]) {
u8 *entry = table + table[1] + (ramcfg * table[2]);
switch (entry[0] & 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;
}
}
}
return NV_MEM_TYPE_UNKNOWN;
}
static int
nouveau_vram_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
{
......
......@@ -195,10 +195,10 @@ nv50_vram_init(struct drm_device *dev)
switch (pfb714 & 0x00000007) {
case 0: dev_priv->vram_type = NV_MEM_TYPE_DDR1; break;
case 1:
if (0 /* some currently unknown condition */)
dev_priv->vram_type = NV_MEM_TYPE_DDR2;
else
if (nouveau_mem_vbios_type(dev) == NV_MEM_TYPE_DDR3)
dev_priv->vram_type = NV_MEM_TYPE_DDR3;
else
dev_priv->vram_type = NV_MEM_TYPE_DDR2;
break;
case 2: dev_priv->vram_type = NV_MEM_TYPE_GDDR3; break;
case 3: dev_priv->vram_type = NV_MEM_TYPE_GDDR4; break;
......
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