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drm/nouveau/therm: don't attempt fan control where PMU is already managing it 

There's already a condition in place which attempts to detect this, but
since we've begun to require a PMU subdev even on boards where we don't
load a custom FW, it's become inaccurate.

This will prevent unnecessarily running a periodic fan update thread on
GP100 and newer, where we don't yet override the default PMU FW.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2019-07-02 14:19:12 +10:00
parent f0790cda65
commit 69cbbb7b04
3 changed files with 23 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/nouveau/include/nvkm/subdev/pmu.h
View File

@ -30,6 +30,7 @@ struct nvkm_pmu {
int nvkm_pmu_send(struct nvkm_pmu *, u32 reply[2], u32 process,
u32 message, u32 data0, u32 data1);
void nvkm_pmu_pgob(struct nvkm_pmu *, bool enable);
bool nvkm_pmu_fan_controlled(struct nvkm_device *);
int gt215_pmu_new(struct nvkm_device *, int, struct nvkm_pmu **);
int gf100_pmu_new(struct nvkm_device *, int, struct nvkm_pmu **);

18
drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c
View File

@ -26,6 +26,24 @@
#include <core/msgqueue.h>
#include <subdev/timer.h>
bool
nvkm_pmu_fan_controlled(struct nvkm_device *device)
{
struct nvkm_pmu *pmu = device->pmu;
/* Internal PMU FW does not currently control fans in any way,
* allow SW control of fans instead.
*/
if (pmu && pmu->func->code.size)
return false;
/* Default (board-loaded, or VBIOS PMU/PREOS) PMU FW on Fermi
* and newer automatically control the fan speed, which would
* interfere with SW control.
*/
return (device->chipset >= 0xc0);
}
void
nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
{

7
drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c
View File

@ -21,9 +21,11 @@
*
* Authors: Martin Peres
*/
#include <nvkm/core/option.h>
#include "priv.h"
#include <core/option.h>
#include <subdev/pmu.h>
int
nvkm_therm_temp_get(struct nvkm_therm *therm)
{
@ -192,8 +194,7 @@ nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
/* The default PPWR ucode on fermi interferes with fan management */
if ((mode >= ARRAY_SIZE(name)) ||
(mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 &&
!device->pmu))
(mode != NVKM_THERM_CTRL_NONE && nvkm_pmu_fan_controlled(device)))
return -EINVAL;
/* do not allow automatic fan management if the thermal sensor is