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

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2014-11-04 13:04:35 +10:00
parent 4766ec5394
commit 1a72f2bd1e
1 changed files with 14 additions and 21 deletions
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35
drivers/gpu/drm/nouveau/core/subdev/fb/base.c
View File

@ -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;
}