linux/drivers/gpu/drm/nouveau/nouveau_volt.c
Linus Torvalds 612a9aab56 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm merge (part 1) from Dave Airlie:
 "So first of all my tree and uapi stuff has a conflict mess, its my
  fault as the nouveau stuff didn't hit -next as were trying to rebase
  regressions out of it before we merged.

  Highlights:
   - SH mobile modesetting driver and associated helpers
   - some DRM core documentation
   - i915 modesetting rework, haswell hdmi, haswell and vlv fixes, write
     combined pte writing, ilk rc6 support,
   - nouveau: major driver rework into a hw core driver, makes features
     like SLI a lot saner to implement,
   - psb: add eDP/DP support for Cedarview
   - radeon: 2 layer page tables, async VM pte updates, better PLL
     selection for > 2 screens, better ACPI interactions

  The rest is general grab bag of fixes.

  So why part 1? well I have the exynos pull req which came in a bit
  late but was waiting for me to do something they shouldn't have and it
  looks fairly safe, and David Howells has some more header cleanups
  he'd like me to pull, that seem like a good idea, but I'd like to get
  this merge out of the way so -next dosen't get blocked."

Tons of conflicts mostly due to silly include line changes, but mostly
mindless.  A few other small semantic conflicts too, noted from Dave's
pre-merged branch.

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (447 commits)
  drm/nv98/crypt: fix fuc build with latest envyas
  drm/nouveau/devinit: fixup various issues with subdev ctor/init ordering
  drm/nv41/vm: fix and enable use of "real" pciegart
  drm/nv44/vm: fix and enable use of "real" pciegart
  drm/nv04/dmaobj: fixup vm target handling in preparation for nv4x pcie
  drm/nouveau: store supported dma mask in vmmgr
  drm/nvc0/ibus: initial implementation of subdev
  drm/nouveau/therm: add support for fan-control modes
  drm/nouveau/hwmon: rename pwm0* to pmw1* to follow hwmon's rules
  drm/nouveau/therm: calculate the pwm divisor on nv50+
  drm/nouveau/fan: rewrite the fan tachometer driver to get more precision, faster
  drm/nouveau/therm: move thermal-related functions to the therm subdev
  drm/nouveau/bios: parse the pwm divisor from the perf table
  drm/nouveau/therm: use the EXTDEV table to detect i2c monitoring devices
  drm/nouveau/therm: rework thermal table parsing
  drm/nouveau/gpio: expose the PWM/TOGGLE parameter found in the gpio vbios table
  drm/nouveau: fix pm initialization order
  drm/nouveau/bios: check that fixed tvdac gpio data is valid before using it
  drm/nouveau: log channel debug/error messages from client object rather than drm client
  drm/nouveau: have drm debugging macros build on top of core macros
  ...
2012-10-03 23:29:23 -07:00

251 lines
6.1 KiB
C

/*
* Copyright 2010 Red Hat Inc.
*
* 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: Ben Skeggs
*/
#include <drm/drmP.h>
#include "nouveau_drm.h"
#include "nouveau_pm.h"
#include <subdev/bios/gpio.h>
#include <subdev/gpio.h>
static const enum dcb_gpio_func_name vidtag[] = { 0x04, 0x05, 0x06, 0x1a, 0x73 };
static int nr_vidtag = sizeof(vidtag) / sizeof(vidtag[0]);
int
nouveau_voltage_gpio_get(struct drm_device *dev)
{
struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_gpio *gpio = nouveau_gpio(device);
u8 vid = 0;
int i;
for (i = 0; i < nr_vidtag; i++) {
if (!(volt->vid_mask & (1 << i)))
continue;
vid |= gpio->get(gpio, 0, vidtag[i], 0xff) << i;
}
return nouveau_volt_lvl_lookup(dev, vid);
}
int
nouveau_voltage_gpio_set(struct drm_device *dev, int voltage)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_gpio *gpio = nouveau_gpio(device);
struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
int vid, i;
vid = nouveau_volt_vid_lookup(dev, voltage);
if (vid < 0)
return vid;
for (i = 0; i < nr_vidtag; i++) {
if (!(volt->vid_mask & (1 << i)))
continue;
gpio->set(gpio, 0, vidtag[i], 0xff, !!(vid & (1 << i)));
}
return 0;
}
int
nouveau_volt_vid_lookup(struct drm_device *dev, int voltage)
{
struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
int i;
for (i = 0; i < volt->nr_level; i++) {
if (volt->level[i].voltage == voltage)
return volt->level[i].vid;
}
return -ENOENT;
}
int
nouveau_volt_lvl_lookup(struct drm_device *dev, int vid)
{
struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
int i;
for (i = 0; i < volt->nr_level; i++) {
if (volt->level[i].vid == vid)
return volt->level[i].voltage;
}
return -ENOENT;
}
void
nouveau_volt_init(struct drm_device *dev)
{
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
struct nouveau_pm *pm = nouveau_pm(dev);
struct nouveau_pm_voltage *voltage = &pm->voltage;
struct nvbios *bios = &drm->vbios;
struct dcb_gpio_func func;
struct bit_entry P;
u8 *volt = NULL, *entry;
int i, headerlen, recordlen, entries, vidmask, vidshift;
if (bios->type == NVBIOS_BIT) {
if (bit_table(dev, 'P', &P))
return;
if (P.version == 1)
volt = ROMPTR(dev, P.data[16]);
else
if (P.version == 2)
volt = ROMPTR(dev, P.data[12]);
else {
NV_WARN(drm, "unknown volt for BIT P %d\n", P.version);
}
} else {
if (bios->data[bios->offset + 6] < 0x27) {
NV_DEBUG(drm, "BMP version too old for voltage\n");
return;
}
volt = ROMPTR(dev, bios->data[bios->offset + 0x98]);
}
if (!volt) {
NV_DEBUG(drm, "voltage table pointer invalid\n");
return;
}
switch (volt[0]) {
case 0x10:
case 0x11:
case 0x12:
headerlen = 5;
recordlen = volt[1];
entries = volt[2];
vidshift = 0;
vidmask = volt[4];
break;
case 0x20:
headerlen = volt[1];
recordlen = volt[3];
entries = volt[2];
vidshift = 0; /* could be vidshift like 0x30? */
vidmask = volt[5];
break;
case 0x30:
headerlen = volt[1];
recordlen = volt[2];
entries = volt[3];
vidmask = volt[4];
/* no longer certain what volt[5] is, if it's related to
* the vid shift then it's definitely not a function of
* how many bits are set.
*
* after looking at a number of nva3+ vbios images, they
* all seem likely to have a static shift of 2.. lets
* go with that for now until proven otherwise.
*/
vidshift = 2;
break;
case 0x40:
headerlen = volt[1];
recordlen = volt[2];
entries = volt[3]; /* not a clue what the entries are for.. */
vidmask = volt[11]; /* guess.. */
vidshift = 0;
break;
default:
NV_WARN(drm, "voltage table 0x%02x unknown\n", volt[0]);
return;
}
/* validate vid mask */
voltage->vid_mask = vidmask;
if (!voltage->vid_mask)
return;
i = 0;
while (vidmask) {
if (i > nr_vidtag) {
NV_DEBUG(drm, "vid bit %d unknown\n", i);
return;
}
if (gpio && gpio->find(gpio, 0, vidtag[i], 0xff, &func)) {
NV_DEBUG(drm, "vid bit %d has no gpio tag\n", i);
return;
}
vidmask >>= 1;
i++;
}
/* parse vbios entries into common format */
voltage->version = volt[0];
if (voltage->version < 0x40) {
voltage->nr_level = entries;
voltage->level =
kcalloc(entries, sizeof(*voltage->level), GFP_KERNEL);
if (!voltage->level)
return;
entry = volt + headerlen;
for (i = 0; i < entries; i++, entry += recordlen) {
voltage->level[i].voltage = entry[0] * 10000;
voltage->level[i].vid = entry[1] >> vidshift;
}
} else {
u32 volt_uv = ROM32(volt[4]);
s16 step_uv = ROM16(volt[8]);
u8 vid;
voltage->nr_level = voltage->vid_mask + 1;
voltage->level = kcalloc(voltage->nr_level,
sizeof(*voltage->level), GFP_KERNEL);
if (!voltage->level)
return;
for (vid = 0; vid <= voltage->vid_mask; vid++) {
voltage->level[vid].voltage = volt_uv;
voltage->level[vid].vid = vid;
volt_uv += step_uv;
}
}
voltage->supported = true;
}
void
nouveau_volt_fini(struct drm_device *dev)
{
struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
kfree(volt->level);
}