mirror of
https://github.com/torvalds/linux.git
synced 2024-11-07 20:51:47 +00:00
343 lines
8.5 KiB
C
343 lines
8.5 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 "drmP.h"
|
|
#include "nouveau_drv.h"
|
|
#include "nouveau_bios.h"
|
|
#include "nouveau_pm.h"
|
|
|
|
static u32 read_clk(struct drm_device *, int, bool);
|
|
static u32 read_pll(struct drm_device *, int, u32);
|
|
|
|
static u32
|
|
read_vco(struct drm_device *dev, int clk)
|
|
{
|
|
u32 sctl = nv_rd32(dev, 0x4120 + (clk * 4));
|
|
if ((sctl & 0x00000030) != 0x00000030)
|
|
return read_pll(dev, 0x41, 0x00e820);
|
|
return read_pll(dev, 0x42, 0x00e8a0);
|
|
}
|
|
|
|
static u32
|
|
read_clk(struct drm_device *dev, int clk, bool ignore_en)
|
|
{
|
|
struct drm_nouveau_private *dev_priv = dev->dev_private;
|
|
u32 sctl, sdiv, sclk;
|
|
|
|
/* refclk for the 0xe8xx plls is a fixed frequency */
|
|
if (clk >= 0x40) {
|
|
if (dev_priv->chipset == 0xaf) {
|
|
/* no joke.. seriously.. sigh.. */
|
|
return nv_rd32(dev, 0x00471c) * 1000;
|
|
}
|
|
|
|
return dev_priv->crystal;
|
|
}
|
|
|
|
sctl = nv_rd32(dev, 0x4120 + (clk * 4));
|
|
if (!ignore_en && !(sctl & 0x00000100))
|
|
return 0;
|
|
|
|
switch (sctl & 0x00003000) {
|
|
case 0x00000000:
|
|
return dev_priv->crystal;
|
|
case 0x00002000:
|
|
if (sctl & 0x00000040)
|
|
return 108000;
|
|
return 100000;
|
|
case 0x00003000:
|
|
sclk = read_vco(dev, clk);
|
|
sdiv = ((sctl & 0x003f0000) >> 16) + 2;
|
|
return (sclk * 2) / sdiv;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static u32
|
|
read_pll(struct drm_device *dev, int clk, u32 pll)
|
|
{
|
|
u32 ctrl = nv_rd32(dev, pll + 0);
|
|
u32 sclk = 0, P = 1, N = 1, M = 1;
|
|
|
|
if (!(ctrl & 0x00000008)) {
|
|
if (ctrl & 0x00000001) {
|
|
u32 coef = nv_rd32(dev, pll + 4);
|
|
M = (coef & 0x000000ff) >> 0;
|
|
N = (coef & 0x0000ff00) >> 8;
|
|
P = (coef & 0x003f0000) >> 16;
|
|
|
|
/* no post-divider on these.. */
|
|
if ((pll & 0x00ff00) == 0x00e800)
|
|
P = 1;
|
|
|
|
sclk = read_clk(dev, 0x00 + clk, false);
|
|
}
|
|
} else {
|
|
sclk = read_clk(dev, 0x10 + clk, false);
|
|
}
|
|
|
|
return sclk * N / (M * P);
|
|
}
|
|
|
|
struct creg {
|
|
u32 clk;
|
|
u32 pll;
|
|
};
|
|
|
|
static int
|
|
calc_clk(struct drm_device *dev, int clk, u32 pll, u32 khz, struct creg *reg)
|
|
{
|
|
struct pll_lims limits;
|
|
u32 oclk, sclk, sdiv;
|
|
int P, N, M, diff;
|
|
int ret;
|
|
|
|
reg->pll = 0;
|
|
reg->clk = 0;
|
|
if (!khz) {
|
|
NV_DEBUG(dev, "no clock for 0x%04x/0x%02x\n", pll, clk);
|
|
return 0;
|
|
}
|
|
|
|
switch (khz) {
|
|
case 27000:
|
|
reg->clk = 0x00000100;
|
|
return khz;
|
|
case 100000:
|
|
reg->clk = 0x00002100;
|
|
return khz;
|
|
case 108000:
|
|
reg->clk = 0x00002140;
|
|
return khz;
|
|
default:
|
|
sclk = read_vco(dev, clk);
|
|
sdiv = min((sclk * 2) / (khz - 2999), (u32)65);
|
|
/* if the clock has a PLL attached, and we can get a within
|
|
* [-2, 3) MHz of a divider, we'll disable the PLL and use
|
|
* the divider instead.
|
|
*
|
|
* divider can go as low as 2, limited here because NVIDIA
|
|
* and the VBIOS on my NVA8 seem to prefer using the PLL
|
|
* for 810MHz - is there a good reason?
|
|
*/
|
|
if (sdiv > 4) {
|
|
oclk = (sclk * 2) / sdiv;
|
|
diff = khz - oclk;
|
|
if (!pll || (diff >= -2000 && diff < 3000)) {
|
|
reg->clk = (((sdiv - 2) << 16) | 0x00003100);
|
|
return oclk;
|
|
}
|
|
}
|
|
|
|
if (!pll) {
|
|
NV_ERROR(dev, "bad freq %02x: %d %d\n", clk, khz, sclk);
|
|
return -ERANGE;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
ret = get_pll_limits(dev, pll, &limits);
|
|
if (ret)
|
|
return ret;
|
|
|
|
limits.refclk = read_clk(dev, clk - 0x10, true);
|
|
if (!limits.refclk)
|
|
return -EINVAL;
|
|
|
|
ret = nva3_calc_pll(dev, &limits, khz, &N, NULL, &M, &P);
|
|
if (ret >= 0) {
|
|
reg->clk = nv_rd32(dev, 0x4120 + (clk * 4));
|
|
reg->pll = (P << 16) | (N << 8) | M;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
prog_pll(struct drm_device *dev, int clk, u32 pll, struct creg *reg)
|
|
{
|
|
const u32 src0 = 0x004120 + (clk * 4);
|
|
const u32 src1 = 0x004160 + (clk * 4);
|
|
const u32 ctrl = pll + 0;
|
|
const u32 coef = pll + 4;
|
|
u32 cntl;
|
|
|
|
if (!reg->clk && !reg->pll) {
|
|
NV_DEBUG(dev, "no clock for %02x\n", clk);
|
|
return;
|
|
}
|
|
|
|
cntl = nv_rd32(dev, ctrl) & 0xfffffff2;
|
|
if (reg->pll) {
|
|
nv_mask(dev, src0, 0x00000101, 0x00000101);
|
|
nv_wr32(dev, coef, reg->pll);
|
|
nv_wr32(dev, ctrl, cntl | 0x00000015);
|
|
nv_mask(dev, src1, 0x00000100, 0x00000000);
|
|
nv_mask(dev, src1, 0x00000001, 0x00000000);
|
|
} else {
|
|
nv_mask(dev, src1, 0x003f3141, 0x00000101 | reg->clk);
|
|
nv_wr32(dev, ctrl, cntl | 0x0000001d);
|
|
nv_mask(dev, ctrl, 0x00000001, 0x00000000);
|
|
nv_mask(dev, src0, 0x00000100, 0x00000000);
|
|
nv_mask(dev, src0, 0x00000001, 0x00000000);
|
|
}
|
|
}
|
|
|
|
static void
|
|
prog_clk(struct drm_device *dev, int clk, struct creg *reg)
|
|
{
|
|
if (!reg->clk) {
|
|
NV_DEBUG(dev, "no clock for %02x\n", clk);
|
|
return;
|
|
}
|
|
|
|
nv_mask(dev, 0x004120 + (clk * 4), 0x003f3141, 0x00000101 | reg->clk);
|
|
}
|
|
|
|
int
|
|
nva3_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
|
|
{
|
|
perflvl->core = read_pll(dev, 0x00, 0x4200);
|
|
perflvl->shader = read_pll(dev, 0x01, 0x4220);
|
|
perflvl->memory = read_pll(dev, 0x02, 0x4000);
|
|
perflvl->unka0 = read_clk(dev, 0x20, false);
|
|
perflvl->vdec = read_clk(dev, 0x21, false);
|
|
perflvl->daemon = read_clk(dev, 0x25, false);
|
|
perflvl->copy = perflvl->core;
|
|
return 0;
|
|
}
|
|
|
|
struct nva3_pm_state {
|
|
struct creg nclk;
|
|
struct creg sclk;
|
|
struct creg mclk;
|
|
struct creg vdec;
|
|
struct creg unka0;
|
|
};
|
|
|
|
void *
|
|
nva3_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
|
|
{
|
|
struct nva3_pm_state *info;
|
|
int ret;
|
|
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ret = calc_clk(dev, 0x10, 0x4200, perflvl->core, &info->nclk);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = calc_clk(dev, 0x11, 0x4220, perflvl->shader, &info->sclk);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = calc_clk(dev, 0x12, 0x4000, perflvl->memory, &info->mclk);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = calc_clk(dev, 0x20, 0x0000, perflvl->unka0, &info->unka0);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = calc_clk(dev, 0x21, 0x0000, perflvl->vdec, &info->vdec);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
out:
|
|
if (ret < 0) {
|
|
kfree(info);
|
|
info = ERR_PTR(ret);
|
|
}
|
|
return info;
|
|
}
|
|
|
|
static bool
|
|
nva3_pm_grcp_idle(void *data)
|
|
{
|
|
struct drm_device *dev = data;
|
|
|
|
if (!(nv_rd32(dev, 0x400304) & 0x00000001))
|
|
return true;
|
|
if (nv_rd32(dev, 0x400308) == 0x0050001c)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void
|
|
nva3_pm_clocks_set(struct drm_device *dev, void *pre_state)
|
|
{
|
|
struct drm_nouveau_private *dev_priv = dev->dev_private;
|
|
struct nva3_pm_state *info = pre_state;
|
|
unsigned long flags;
|
|
|
|
/* prevent any new grctx switches from starting */
|
|
spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
|
|
nv_wr32(dev, 0x400324, 0x00000000);
|
|
nv_wr32(dev, 0x400328, 0x0050001c); /* wait flag 0x1c */
|
|
/* wait for any pending grctx switches to complete */
|
|
if (!nv_wait_cb(dev, nva3_pm_grcp_idle, dev)) {
|
|
NV_ERROR(dev, "pm: ctxprog didn't go idle\n");
|
|
goto cleanup;
|
|
}
|
|
/* freeze PFIFO */
|
|
nv_mask(dev, 0x002504, 0x00000001, 0x00000001);
|
|
if (!nv_wait(dev, 0x002504, 0x00000010, 0x00000010)) {
|
|
NV_ERROR(dev, "pm: fifo didn't go idle\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
prog_pll(dev, 0x00, 0x004200, &info->nclk);
|
|
prog_pll(dev, 0x01, 0x004220, &info->sclk);
|
|
prog_clk(dev, 0x20, &info->unka0);
|
|
prog_clk(dev, 0x21, &info->vdec);
|
|
|
|
if (info->mclk.clk || info->mclk.pll) {
|
|
nv_wr32(dev, 0x100210, 0);
|
|
nv_wr32(dev, 0x1002dc, 1);
|
|
nv_wr32(dev, 0x004018, 0x00001000);
|
|
prog_pll(dev, 0x02, 0x004000, &info->mclk);
|
|
if (nv_rd32(dev, 0x4000) & 0x00000008)
|
|
nv_wr32(dev, 0x004018, 0x1000d000);
|
|
else
|
|
nv_wr32(dev, 0x004018, 0x10005000);
|
|
nv_wr32(dev, 0x1002dc, 0);
|
|
nv_wr32(dev, 0x100210, 0x80000000);
|
|
}
|
|
|
|
cleanup:
|
|
/* unfreeze PFIFO */
|
|
nv_mask(dev, 0x002504, 0x00000001, 0x00000000);
|
|
/* restore ctxprog to normal */
|
|
nv_wr32(dev, 0x400324, 0x00000000);
|
|
nv_wr32(dev, 0x400328, 0x0070009c); /* set flag 0x1c */
|
|
/* unblock it if necessary */
|
|
if (nv_rd32(dev, 0x400308) == 0x0050001c)
|
|
nv_mask(dev, 0x400824, 0x10000000, 0x10000000);
|
|
spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
|
|
kfree(info);
|
|
}
|