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drm/nouveau/bios/perf: parse the pci speed from the bios for tesla and newer cards 

Signed-off-by: Karol Herbst <nouveau@karolherbst.de>
This commit is contained in:
Karol Herbst 2015-09-15 18:47:12 +02:00 committed by Ben Skeggs
parent 3aba825ffa
commit c6e2f9bc03
2 changed files with 18 additions and 0 deletions
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2
drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/perf.h
View File

@ -13,6 +13,8 @@ struct nvbios_perfE {
u32 vdec;
u32 disp;
u32 script;
u8 pcie_speed;
u8 pcie_width;
};
u16 nvbios_perf_entry(struct nvkm_bios *, int idx,

16
drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c
View File

@ -24,6 +24,7 @@
#include <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/perf.h>
#include <subdev/pci.h>
u16
nvbios_perf_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr,
@ -145,6 +146,21 @@ nvbios_perfEp(struct nvkm_bios *bios, int idx,
break;
case 0x40:
info->voltage = nvbios_rd08(bios, perf + 0x02);
switch (nvbios_rd08(bios, perf + 0xb) & 0x3) {
case 0:
info->pcie_speed = NVKM_PCIE_SPEED_5_0;
break;
case 3:
case 1:
info->pcie_speed = NVKM_PCIE_SPEED_2_5;
break;
case 2:
info->pcie_speed = NVKM_PCIE_SPEED_8_0;
break;
default:
break;
}
info->pcie_width = 0xff;
break;
default:
return 0x0000;