mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 19:01:37 +00:00
fade7ad56d
This will end up quite different, it makes sense for it to be completely separate. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
96 lines
2.6 KiB
C
96 lines
2.6 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"
|
|
|
|
/*XXX: boards using limits 0x40 need fixing, the register layout
|
|
* is correct here, but, there's some other funny magic
|
|
* that modifies things, so it's not likely we'll set/read
|
|
* the correct timings yet.. working on it...
|
|
*/
|
|
|
|
struct nva3_pm_state {
|
|
struct pll_lims pll;
|
|
int N, M, P;
|
|
};
|
|
|
|
int
|
|
nva3_pm_clock_get(struct drm_device *dev, u32 id)
|
|
{
|
|
struct pll_lims pll;
|
|
int P, N, M, ret;
|
|
u32 reg;
|
|
|
|
ret = get_pll_limits(dev, id, &pll);
|
|
if (ret)
|
|
return ret;
|
|
|
|
reg = nv_rd32(dev, pll.reg + 4);
|
|
P = (reg & 0x003f0000) >> 16;
|
|
N = (reg & 0x0000ff00) >> 8;
|
|
M = (reg & 0x000000ff);
|
|
return pll.refclk * N / M / P;
|
|
}
|
|
|
|
void *
|
|
nva3_pm_clock_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl,
|
|
u32 id, int khz)
|
|
{
|
|
struct nva3_pm_state *state;
|
|
int dummy, ret;
|
|
|
|
state = kzalloc(sizeof(*state), GFP_KERNEL);
|
|
if (!state)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ret = get_pll_limits(dev, id, &state->pll);
|
|
if (ret < 0) {
|
|
kfree(state);
|
|
return (ret == -ENOENT) ? NULL : ERR_PTR(ret);
|
|
}
|
|
|
|
ret = nv50_calc_pll2(dev, &state->pll, khz, &state->N, &dummy,
|
|
&state->M, &state->P);
|
|
if (ret < 0) {
|
|
kfree(state);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
void
|
|
nva3_pm_clock_set(struct drm_device *dev, void *pre_state)
|
|
{
|
|
struct nva3_pm_state *state = pre_state;
|
|
u32 reg = state->pll.reg;
|
|
|
|
nv_wr32(dev, reg + 4, (state->P << 16) | (state->N << 8) | state->M);
|
|
kfree(state);
|
|
}
|
|
|