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drm/nouveau/bios: parse the pwm divisor from the perf table

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v2: perf_table now is more in line with the other functions

Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Martin Peres 2012-08-30 02:31:59 +02:00 committed by Ben Skeggs
parent 32334cc03a
commit d46497dce7
3 changed files with 90 additions and 0 deletions
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1
drivers/gpu/drm/nouveau/Makefile
View File

@ -35,6 +35,7 @@ nouveau-y += core/subdev/bios/gpio.o
nouveau-y += core/subdev/bios/i2c.o
nouveau-y += core/subdev/bios/init.o
nouveau-y += core/subdev/bios/mxm.o
nouveau-y += core/subdev/bios/perf.o
nouveau-y += core/subdev/bios/pll.o
nouveau-y += core/subdev/bios/therm.o
nouveau-y += core/subdev/clock/nv04.o

14
drivers/gpu/drm/nouveau/core/include/subdev/bios/perf.h Normal file
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@ -0,0 +1,14 @@
#ifndef __NVBIOS_PERF_H__
#define __NVBIOS_PERF_H__
struct nouveau_bios;
struct nvbios_perf_fan {
u32 pwm_divisor;
};
int
nvbios_perf_fan_parse(struct nouveau_bios *, struct nvbios_perf_fan *);
#endif

75
drivers/gpu/drm/nouveau/core/subdev/bios/perf.c Normal file
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@ -0,0 +1,75 @@
/*
* Copyright 2012 Nouveau Community
*
* 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 <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/perf.h>
static u16
perf_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
struct bit_entry bit_P;
u16 perf = 0x0000;
if (!bit_entry(bios, 'P', &bit_P)) {
if (bit_P.version <= 2) {
perf = nv_ro16(bios, bit_P.offset + 0);
if (perf) {
*ver = nv_ro08(bios, perf + 0);
*hdr = nv_ro08(bios, perf + 1);
}
} else
nv_error(bios, "unknown offset for perf in BIT P %d\n",
bit_P.version);
}
if (bios->bmp_offset) {
if (nv_ro08(bios, bios->bmp_offset + 6) >= 0x25) {
perf = nv_ro16(bios, bios->bmp_offset + 0x94);
if (perf) {
*hdr = nv_ro08(bios, perf + 0);
*ver = nv_ro08(bios, perf + 1);
}
}
}
return perf;
}
int
nvbios_perf_fan_parse(struct nouveau_bios *bios,
struct nvbios_perf_fan *fan)
{
u8 ver = 0, hdr = 0, cnt = 0, len = 0;
u16 perf = perf_table(bios, &ver, &hdr, &cnt, &len);
if (!perf)
return -ENODEV;
if (ver >= 0x20 && ver < 0x40 && hdr > 6)
fan->pwm_divisor = nv_ro16(bios, perf + 6);
else
fan->pwm_divisor = 0;
return 0;
}