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drm/nouveau/bios: Add parsing of VPSTATE table

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This table contains three important clocks:

base  clock: This is the non boosted max clock.
tdp   clock: The clock at wich the vbios guarentees the TDP won't ever be
             exceeded at max load (seems to be always the same as the base
             clock, but behaves differently).
boost clock: The avg clock the gpu will stay boosted to. It doesn't seem to
             affect the behaviour of the nvidia driver at all though.

v2: Make clear that base/boost/tdp fields are ids.
v5: Rename Base clock to vpstate.
    Make vbios pointers 32bit.

Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Karol Herbst
2016-07-12 21:36:08 +02:00
committed by Ben Skeggs
parent 1f7f3d91ad
commit f26493d22f
3 changed files with 107 additions and 0 deletions
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24
drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/vpstate.h Normal file
View File

@@ -0,0 +1,24 @@
#ifndef __NVBIOS_VPSTATE_H__
#define __NVBIOS_VPSTATE_H__
struct nvbios_vpstate_header {
u32 offset;
u8 version;
u8 hlen;
u8 ecount;
u8 elen;
u8 scount;
u8 slen;
u8 base_id;
u8 boost_id;
u8 tdp_id;
};
struct nvbios_vpstate_entry {
u8 pstate;
u16 clock_mhz;
};
int nvbios_vpstate_parse(struct nvkm_bios *, struct nvbios_vpstate_header *);
int nvbios_vpstate_entry(struct nvkm_bios *, struct nvbios_vpstate_header *,
u8 idx, struct nvbios_vpstate_entry *);
#endif