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drm/nouveau/volt/gk104: add support for pwm and gpio modes

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Most Keplers actually use the GPIO-based voltage management instead of the new
PWM-based one. Use the GPIO mode as a fallback as it already gracefully handles
the case where no GPIOs exist.

All the Maxwells seem to use the PWM method though.

v2:
 - Do not forget to commit the PWM configuration change!

Signed-off-by: Martin Peres <martin.peres@free.fr>
This commit is contained in:
Martin Peres 2015-09-09 00:34:33 +02:00 committed by Ben Skeggs
parent 4c58a05b4a
commit 1531dbbb56
6 changed files with 133 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -15,6 +15,7 @@ enum dcb_gpio_func_name {
DCB_GPIO_VID5 = 0x74,
DCB_GPIO_VID6 = 0x75,
DCB_GPIO_VID7 = 0x76,
DCB_GPIO_VID_PWM = 0x81,
};
#define DCB_GPIO_LOG_DIR 0x02

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

@ -18,5 +18,6 @@ int nvkm_volt_get(struct nvkm_volt *);
int nvkm_volt_set_id(struct nvkm_volt *, u8 id, int condition);
int nv40_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
int gk104_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
int gk20a_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
#endif

14
drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
View File

@ -1673,7 +1673,7 @@ nve4_chipset = {
.pmu = gk104_pmu_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
.volt = nv40_volt_new,
.volt = gk104_volt_new,
.ce[0] = gk104_ce_new,
.ce[1] = gk104_ce_new,
.ce[2] = gk104_ce_new,
@ -1710,7 +1710,7 @@ nve6_chipset = {
.pmu = gk104_pmu_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
.volt = nv40_volt_new,
.volt = gk104_volt_new,
.ce[0] = gk104_ce_new,
.ce[1] = gk104_ce_new,
.ce[2] = gk104_ce_new,
@ -1747,7 +1747,7 @@ nve7_chipset = {
.pmu = gf119_pmu_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
.volt = nv40_volt_new,
.volt = gk104_volt_new,
.ce[0] = gk104_ce_new,
.ce[1] = gk104_ce_new,
.ce[2] = gk104_ce_new,
@ -1808,7 +1808,7 @@ nvf0_chipset = {
.pmu = gk110_pmu_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
.volt = nv40_volt_new,
.volt = gk104_volt_new,
.ce[0] = gk104_ce_new,
.ce[1] = gk104_ce_new,
.ce[2] = gk104_ce_new,
@ -1844,7 +1844,7 @@ nvf1_chipset = {
.pmu = gk110_pmu_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
.volt = nv40_volt_new,
.volt = gk104_volt_new,
.ce[0] = gk104_ce_new,
.ce[1] = gk104_ce_new,
.ce[2] = gk104_ce_new,
@ -1880,7 +1880,7 @@ nv106_chipset = {
.pmu = gk208_pmu_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
.volt = nv40_volt_new,
.volt = gk104_volt_new,
.ce[0] = gk104_ce_new,
.ce[1] = gk104_ce_new,
.ce[2] = gk104_ce_new,
@ -1916,7 +1916,7 @@ nv108_chipset = {
.pmu = gk208_pmu_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
.volt = nv40_volt_new,
.volt = gk104_volt_new,
.ce[0] = gk104_ce_new,
.ce[1] = gk104_ce_new,
.ce[2] = gk104_ce_new,

1
drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild
View File

@ -1,4 +1,5 @@
nvkm-y += nvkm/subdev/volt/base.o
nvkm-y += nvkm/subdev/volt/gpio.o
nvkm-y += nvkm/subdev/volt/nv40.o
nvkm-y += nvkm/subdev/volt/gk104.o
nvkm-y += nvkm/subdev/volt/gk20a.o

119
drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c Normal file
View File

@ -0,0 +1,119 @@
/*
* Copyright 2015 Martin Peres
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Martin Peres
*/
#include "priv.h"
#include <subdev/volt.h>
#include <subdev/gpio.h>
#include <subdev/bios.h>
#include <subdev/bios/volt.h>
#define gk104_volt(p) container_of((p), struct gk104_volt, base)
struct gk104_volt {
struct nvkm_volt base;
struct nvbios_volt bios;
};
int
gk104_volt_get(struct nvkm_volt *base)
{
struct nvbios_volt *bios = &gk104_volt(base)->bios;
struct nvkm_device *device = base->subdev.device;
u32 div, duty;
div = nvkm_rd32(device, 0x20340);
duty = nvkm_rd32(device, 0x20344);
return bios->base + bios->pwm_range * duty / div;
}
int
gk104_volt_set(struct nvkm_volt *base, u32 uv)
{
struct nvbios_volt *bios = &gk104_volt(base)->bios;
struct nvkm_device *device = base->subdev.device;
u32 div, duty;
/* the blob uses this crystal frequency, let's use it too. */
div = 27648000 / bios->pwm_freq;
duty = (uv - bios->base) * div / bios->pwm_range;
nvkm_wr32(device, 0x20340, div);
nvkm_wr32(device, 0x20344, 0x8000000 | duty);
return 0;
}
static const struct nvkm_volt_func
gk104_volt_pwm = {
.volt_get = gk104_volt_get,
.volt_set = gk104_volt_set,
}, gk104_volt_gpio = {
.vid_get = nvkm_voltgpio_get,
.vid_set = nvkm_voltgpio_set,
};
int
gk104_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
{
const struct nvkm_volt_func *volt_func = &gk104_volt_gpio;
struct dcb_gpio_func gpio;
struct nvbios_volt bios;
struct gk104_volt *volt;
u8 ver, hdr, cnt, len;
const char *mode;
if (!nvbios_volt_parse(device->bios, &ver, &hdr, &cnt, &len, &bios))
return 0;
if (!nvkm_gpio_find(device->gpio, 0, DCB_GPIO_VID_PWM, 0xff, &gpio) &&
bios.type == NVBIOS_VOLT_PWM) {
volt_func = &gk104_volt_pwm;
}
if (!(volt = kzalloc(sizeof(*volt), GFP_KERNEL)))
return -ENOMEM;
nvkm_volt_ctor(volt_func, device, index, &volt->base);
*pvolt = &volt->base;
volt->bios = bios;
/* now that we have a subdev, we can show an error if we found through
* the voltage table that we were supposed to use the PWN mode but we
* did not find the right GPIO for it.
*/
if (bios.type == NVBIOS_VOLT_PWM && volt_func != &gk104_volt_pwm) {
nvkm_error(&volt->base.subdev,
"Type mismatch between the voltage table type and "
"the GPIO table. Fallback to GPIO mode.\n");
}
if (volt_func == &gk104_volt_gpio) {
nvkm_voltgpio_init(&volt->base);
mode = "GPIO";
} else
mode = "PWM";
nvkm_debug(&volt->base.subdev, "Using %s mode\n", mode);
return 0;
}

4
drivers/gpu/drm/nouveau/nvkm/subdev/volt/priv.h
View File

@ -19,4 +19,8 @@ struct nvkm_volt_func {
int nvkm_voltgpio_init(struct nvkm_volt *);
int nvkm_voltgpio_get(struct nvkm_volt *);
int nvkm_voltgpio_set(struct nvkm_volt *, u8);
int nvkm_voltpwm_init(struct nvkm_volt *volt);
int nvkm_voltpwm_get(struct nvkm_volt *volt);
int nvkm_voltpwm_set(struct nvkm_volt *volt, u32 uv);
#endif