From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Profile 0 sensors have no OP clock branck in the clock tree. The PLL
calculator still calculated them, they just weren't used for anything.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
drivers/media/i2c/smiapp-pll.c | 82 +++++++++++++++++++++++++---------------
1 file changed, 52 insertions(+), 30 deletions(-)
diff --git a/drivers/media/i2c/smiapp-pll.c b/drivers/media/i2c/smiapp-pll.c
index f83f25f..862ca0c 100644
--- a/drivers/media/i2c/smiapp-pll.c
+++ b/drivers/media/i2c/smiapp-pll.c
@@ -89,7 +89,9 @@ static void print_pll(struct device *dev, struct smiapp_pll *pll)
static int check_all_bounds(struct device *dev,
const struct smiapp_pll_limits *limits,
- struct smiapp_pll *pll)
+ const struct smiapp_pll_branch_limits *op_limits,
+ struct smiapp_pll *pll,
+ struct smiapp_pll_branch *op_pll)
{
int rval;
@@ -109,25 +111,25 @@ static int check_all_bounds(struct device *dev,
"pll_op_clk_freq_hz");
if (!rval)
rval = bounds_check(
- dev, pll->op.sys_clk_div,
- limits->op.min_sys_clk_div, limits->op.max_sys_clk_div,
+ dev, op_pll->sys_clk_div,
+ op_limits->min_sys_clk_div, op_limits->max_sys_clk_div,
"op_sys_clk_div");
if (!rval)
rval = bounds_check(
- dev, pll->op.pix_clk_div,
- limits->op.min_pix_clk_div, limits->op.max_pix_clk_div,
+ dev, op_pll->pix_clk_div,
+ op_limits->min_pix_clk_div, op_limits->max_pix_clk_div,
"op_pix_clk_div");
if (!rval)
rval = bounds_check(
- dev, pll->op.sys_clk_freq_hz,
- limits->op.min_sys_clk_freq_hz,
- limits->op.max_sys_clk_freq_hz,
+ dev, op_pll->sys_clk_freq_hz,
+ op_limits->min_sys_clk_freq_hz,
+ op_limits->max_sys_clk_freq_hz,
"op_sys_clk_freq_hz");
if (!rval)
rval = bounds_check(
- dev, pll->op.pix_clk_freq_hz,
- limits->op.min_pix_clk_freq_hz,
- limits->op.max_pix_clk_freq_hz,
+ dev, op_pll->pix_clk_freq_hz,
+ op_limits->min_pix_clk_freq_hz,
+ op_limits->max_pix_clk_freq_hz,
"op_pix_clk_freq_hz");
/*
@@ -164,10 +166,11 @@ static int check_all_bounds(struct device *dev,
*
* @return Zero on success, error code on error.
*/
-static int __smiapp_pll_calculate(struct device *dev,
- const struct smiapp_pll_limits *limits,
- struct smiapp_pll *pll, uint32_t mul,
- uint32_t div, uint32_t lane_op_clock_ratio)
+static int __smiapp_pll_calculate(
+ struct device *dev, const struct smiapp_pll_limits *limits,
+ const struct smiapp_pll_branch_limits *op_limits,
+ struct smiapp_pll *pll, struct smiapp_pll_branch *op_pll, uint32_t mul,
+ uint32_t div, uint32_t lane_op_clock_ratio)
{
uint32_t sys_div;
uint32_t best_pix_div = INT_MAX >> 1;
@@ -204,7 +207,7 @@ static int __smiapp_pll_calculate(struct device *dev,
more_mul_max);
/* Don't go above the division capability of op sys clock divider. */
more_mul_max = min(more_mul_max,
- limits->op.max_sys_clk_div * pll->pre_pll_clk_div
+ op_limits->max_sys_clk_div * pll->pre_pll_clk_div
/ div);
dev_dbg(dev, "more_mul_max: max_op_sys_clk_div check: %u\n",
more_mul_max);
@@ -234,8 +237,8 @@ static int __smiapp_pll_calculate(struct device *dev,
more_mul_factor = lcm(div, pll->pre_pll_clk_div) / div;
dev_dbg(dev, "more_mul_factor: %u\n", more_mul_factor);
- more_mul_factor = lcm(more_mul_factor, limits->op.min_sys_clk_div);
- dev_dbg(dev, "more_mul_factor: min_op_sys_clk_div: %u\n",
+ more_mul_factor = lcm(more_mul_factor, op_limits->min_sys_clk_div);
+ dev_dbg(dev, "more_mul_factor: min_op_sys_clk_div: %d\n",
more_mul_factor);
i = roundup(more_mul_min, more_mul_factor);
if (!is_one_or_even(i))
@@ -248,8 +251,8 @@ static int __smiapp_pll_calculate(struct device *dev,
}
pll->pll_multiplier = mul * i;
- pll->op.sys_clk_div = div * i / pll->pre_pll_clk_div;
- dev_dbg(dev, "op_sys_clk_div: %u\n", pll->op.sys_clk_div);
+ op_pll->sys_clk_div = div * i / pll->pre_pll_clk_div;
+ dev_dbg(dev, "op_sys_clk_div: %u\n", op_pll->sys_clk_div);
pll->pll_ip_clk_freq_hz = pll->ext_clk_freq_hz
/ pll->pre_pll_clk_div;
@@ -258,14 +261,19 @@ static int __smiapp_pll_calculate(struct device *dev,
* pll->pll_multiplier;
/* Derive pll_op_clk_freq_hz. */
- pll->op.sys_clk_freq_hz =
- pll->pll_op_clk_freq_hz / pll->op.sys_clk_div;
+ op_pll->sys_clk_freq_hz =
+ pll->pll_op_clk_freq_hz / op_pll->sys_clk_div;
- pll->op.pix_clk_div = pll->bits_per_pixel;
- dev_dbg(dev, "op_pix_clk_div: %u\n", pll->op.pix_clk_div);
+ op_pll->pix_clk_div = pll->bits_per_pixel;
+ dev_dbg(dev, "op_pix_clk_div: %u\n", op_pll->pix_clk_div);
- pll->op.pix_clk_freq_hz =
- pll->op.sys_clk_freq_hz / pll->op.pix_clk_div;
+ op_pll->pix_clk_freq_hz =
+ op_pll->sys_clk_freq_hz / op_pll->pix_clk_div;
+
+ if (pll->flags & SMIAPP_PLL_FLAG_NO_OP_CLOCKS) {
+ /* No OP clocks --- VT clocks are used instead. */
+ goto out_skip_vt_calc;
+ }
/*
* Some sensors perform analogue binning and some do this
@@ -293,7 +301,7 @@ static int __smiapp_pll_calculate(struct device *dev,
* Find absolute limits for the factor of vt divider.
*/
dev_dbg(dev, "scale_m: %u\n", pll->scale_m);
- min_vt_div = DIV_ROUND_UP(pll->op.pix_clk_div * pll->op.sys_clk_div
+ min_vt_div = DIV_ROUND_UP(op_pll->pix_clk_div * op_pll->sys_clk_div
* pll->scale_n,
lane_op_clock_ratio * vt_op_binning_div
* pll->scale_m);
@@ -385,16 +393,19 @@ static int __smiapp_pll_calculate(struct device *dev,
pll->vt.pix_clk_freq_hz =
pll->vt.sys_clk_freq_hz / pll->vt.pix_clk_div;
+out_skip_vt_calc:
pll->pixel_rate_csi =
- pll->op.pix_clk_freq_hz * lane_op_clock_ratio;
+ op_pll->pix_clk_freq_hz * lane_op_clock_ratio;
- return check_all_bounds(dev, limits, pll);
+ return check_all_bounds(dev, limits, op_limits, pll, op_pll);
}
int smiapp_pll_calculate(struct device *dev,
const struct smiapp_pll_limits *limits,
struct smiapp_pll *pll)
{
+ const struct smiapp_pll_branch_limits *op_limits = &limits->op;
+ struct smiapp_pll_branch *op_pll = &pll->op;
uint16_t min_pre_pll_clk_div;
uint16_t max_pre_pll_clk_div;
uint32_t lane_op_clock_ratio;
@@ -402,6 +413,16 @@ int smiapp_pll_calculate(struct device *dev,
unsigned int i;
int rval = -EINVAL;
+ if (pll->flags & SMIAPP_PLL_FLAG_NO_OP_CLOCKS) {
+ /*
+ * If there's no OP PLL at all, use the VT values
+ * instead. The OP values are ignored for the rest of
+ * the PLL calculation.
+ */
+ op_limits = &limits->vt;
+ op_pll = &pll->vt;
+ }
+
if (pll->flags & SMIAPP_PLL_FLAG_OP_PIX_CLOCK_PER_LANE)
lane_op_clock_ratio = pll->csi2.lanes;
else
@@ -457,7 +478,8 @@ int smiapp_pll_calculate(struct device *dev,
for (pll->pre_pll_clk_div = min_pre_pll_clk_div;
pll->pre_pll_clk_div <= max_pre_pll_clk_div;
pll->pre_pll_clk_div += 2 - (pll->pre_pll_clk_div & 1)) {
- rval = __smiapp_pll_calculate(dev, limits, pll, mul, div,
+ rval = __smiapp_pll_calculate(dev, limits, op_limits, pll,
+ op_pll, mul, div,
lane_op_clock_ratio);
if (rval)
continue;
--
1.7.10.4
--
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