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media: ccs-pll: Better separate OP and VT sub-tree calculation

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Better separate OP PLL branch calculation from VT branch calculation.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Sakari Ailus 2020-09-04 10:52:13 +02:00 committed by Mauro Carvalho Chehab
parent 38c94eb8d7
commit a38836b2d0
1 changed files with 31 additions and 23 deletions
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54
drivers/media/i2c/ccs-pll.c
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@ -162,11 +162,11 @@ static int check_all_bounds(struct device *dev,
#define PHY_CONST_DIV 16
static void
__ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim,
const struct ccs_pll_branch_limits_bk *op_lim_bk,
struct ccs_pll *pll, struct ccs_pll_branch_fr *pll_fr,
struct ccs_pll_branch_bk *op_pll_bk, bool cphy,
uint32_t phy_const)
ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim,
const struct ccs_pll_branch_limits_bk *op_lim_bk,
struct ccs_pll *pll, struct ccs_pll_branch_fr *pll_fr,
struct ccs_pll_branch_bk *op_pll_bk, bool cphy,
uint32_t phy_const)
{
uint32_t sys_div;
uint32_t best_pix_div = INT_MAX >> 1;
@ -174,6 +174,9 @@ __ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim,
uint32_t min_vt_div, max_vt_div, vt_div;
uint32_t min_sys_div, max_sys_div;
if (pll->flags & CCS_PLL_FLAG_NO_OP_CLOCKS)
goto out_calc_pixel_rate;
/*
* Find out whether a sensor supports derating. If it does not, VT and
* OP domains are required to run at the same pixel rate.
@ -313,6 +316,10 @@ __ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim,
pll_fr->pll_op_clk_freq_hz / pll->vt_bk.sys_clk_div;
pll->vt_bk.pix_clk_freq_hz =
pll->vt_bk.sys_clk_freq_hz / pll->vt_bk.pix_clk_div;
out_calc_pixel_rate:
pll->pixel_rate_pixel_array =
pll->vt_bk.pix_clk_freq_hz * pll->vt_lanes;
}
/*
@ -327,12 +334,12 @@ __ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim,
* @return Zero on success, error code on error.
*/
static int
__ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
const struct ccs_pll_branch_limits_fr *op_lim_fr,
const struct ccs_pll_branch_limits_bk *op_lim_bk,
struct ccs_pll *pll, struct ccs_pll_branch_fr *op_pll_fr,
struct ccs_pll_branch_bk *op_pll_bk, uint32_t mul,
uint32_t div, uint32_t l, bool cphy, uint32_t phy_const)
ccs_pll_calculate_op(struct device *dev, const struct ccs_pll_limits *lim,
const struct ccs_pll_branch_limits_fr *op_lim_fr,
const struct ccs_pll_branch_limits_bk *op_lim_bk,
struct ccs_pll *pll, struct ccs_pll_branch_fr *op_pll_fr,
struct ccs_pll_branch_bk *op_pll_bk, uint32_t mul,
uint32_t div, uint32_t l, bool cphy, uint32_t phy_const)
{
/*
* Higher multipliers (and divisors) are often required than
@ -430,15 +437,7 @@ __ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
dev_dbg(dev, "op_pix_clk_div: %u\n", op_pll_bk->pix_clk_div);
if (!(pll->flags & CCS_PLL_FLAG_NO_OP_CLOCKS))
__ccs_pll_calculate_vt(dev, lim, op_lim_bk, pll, op_pll_fr,
op_pll_bk, cphy, phy_const);
pll->pixel_rate_pixel_array =
pll->vt_bk.pix_clk_freq_hz * pll->vt_lanes;
return check_all_bounds(dev, lim, op_lim_fr, op_lim_bk, pll, op_pll_fr,
op_pll_bk);
return 0;
}
int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
@ -558,13 +557,22 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
op_pll_fr->pre_pll_clk_div +=
(pll->flags & CCS_PLL_FLAG_EXT_IP_PLL_DIVIDER) ? 1 :
2 - (op_pll_fr->pre_pll_clk_div & 1)) {
rval = __ccs_pll_calculate(dev, lim, op_lim_fr, op_lim_bk, pll,
op_pll_fr, op_pll_bk, mul, div, l,
cphy, phy_const);
rval = ccs_pll_calculate_op(dev, lim, op_lim_fr, op_lim_bk, pll,
op_pll_fr, op_pll_bk, mul, div, l,
cphy, phy_const);
if (rval)
continue;
ccs_pll_calculate_vt(dev, lim, op_lim_bk, pll, op_pll_fr,
op_pll_bk, cphy, phy_const);
rval = check_all_bounds(dev, lim, op_lim_fr, op_lim_bk, pll,
op_pll_fr, op_pll_bk);
if (rval)
continue;
print_pll(dev, pll);
return 0;
}