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/*
* 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_drv.h"
#include "nouveau_hw.h"
#include "nouveau_pm.h"
int
nv04_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
int ret;
ret = nouveau_hw_get_clock(dev, PLL_CORE);
if (ret < 0)
return ret;
perflvl->core = ret;
ret = nouveau_hw_get_clock(dev, PLL_MEMORY);
if (ret < 0)
return ret;
perflvl->memory = ret;
return 0;
}
struct nv04_pm_clock {
struct pll_lims pll;
struct nouveau_pll_vals calc;
};
struct nv04_pm_state {
struct nv04_pm_clock core;
struct nv04_pm_clock memory;
};
static int
calc_pll(struct drm_device *dev, u32 id, int khz, struct nv04_pm_clock *clk)
{
int ret;
ret = get_pll_limits(dev, id, &clk->pll);
if (ret)
return ret;
ret = nouveau_calc_pll_mnp(dev, &clk->pll, khz, &clk->calc);
if (!ret)
return -EINVAL;
return 0;
}
void *
nv04_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
struct nv04_pm_state *info;
int ret;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return ERR_PTR(-ENOMEM);
ret = calc_pll(dev, PLL_CORE, perflvl->core, &info->core);
if (ret)
goto error;
if (perflvl->memory) {
ret = calc_pll(dev, PLL_MEMORY, perflvl->memory, &info->memory);
if (ret)
goto error;
}
return info;
error:
kfree(info);
return ERR_PTR(ret);
}
static void
prog_pll(struct drm_device *dev, struct nv04_pm_clock *clk)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
u32 reg = clk->pll.reg;
/* thank the insane nouveau_hw_setpll() interface for this */
if (dev_priv->card_type >= NV_40)
reg += 4;
nouveau_hw_setpll(dev, reg, &clk->calc);
}
int
nv04_pm_clocks_set(struct drm_device *dev, void *pre_state)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
struct nv04_pm_state *state = pre_state;
prog_pll(dev, &state->core);
if (state->memory.pll.reg) {
prog_pll(dev, &state->memory);
if (dev_priv->card_type < NV_30) {
if (dev_priv->card_type == NV_20)
nv_mask(dev, 0x1002c4, 0, 1 << 20);
/* Reset the DLLs */
nv_mask(dev, 0x1002c0, 0, 1 << 8);
}
}
ptimer->init(dev);
kfree(state);
return 0;
}
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