Add C-PHY support for the CCS PLL calculator.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
drivers/media/i2c/ccs-pll.c | 35 ++++++++++++++++++++++++++---------
1 file changed, 26 insertions(+), 9 deletions(-)
diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c
index 1a4fccfc1158..52e6230c087d 100644
--- a/drivers/media/i2c/ccs-pll.c
+++ b/drivers/media/i2c/ccs-pll.c
@@ -145,6 +145,10 @@ static int check_all_bounds(struct device *dev,
return rval;
}
+#define CPHY_CONST 7
+#define DPHY_CONST 16
+#define PHY_CONST_DIV 16
+
/*
* Heuristically guess the PLL tree for a given common multiplier and
* divisor. Begin with the operational timing and continue to video
@@ -162,7 +166,7 @@ __ccs_pll_calculate(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 *op_pll_fr,
struct ccs_pll_branch_bk *op_pll_bk, uint32_t mul,
- uint32_t div, uint32_t l)
+ uint32_t div, uint32_t l, bool cphy, uint32_t phy_const)
{
uint32_t sys_div;
uint32_t best_pix_div = INT_MAX >> 1;
@@ -254,9 +258,11 @@ __ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
if (pll->flags & CCS_PLL_FLAG_LANE_SPEED_MODEL)
op_pll_bk->pix_clk_div = pll->bits_per_pixel
- * pll->op_lanes / pll->csi2.lanes / l;
+ * pll->op_lanes * phy_const
+ / PHY_CONST_DIV / pll->csi2.lanes / l;
else
- op_pll_bk->pix_clk_div = pll->bits_per_pixel / l;
+ op_pll_bk->pix_clk_div =
+ pll->bits_per_pixel * phy_const / PHY_CONST_DIV / l;
op_pll_bk->pix_clk_freq_hz =
op_pll_bk->sys_clk_freq_hz / op_pll_bk->pix_clk_div;
@@ -295,10 +301,11 @@ __ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
*/
dev_dbg(dev, "scale_m: %u\n", pll->scale_m);
min_vt_div = DIV_ROUND_UP(pll->bits_per_pixel * op_pll_bk->sys_clk_div
- * pll->scale_n * pll->vt_lanes,
+ * pll->scale_n * pll->vt_lanes * phy_const,
(pll->flags & CCS_PLL_FLAG_LANE_SPEED_MODEL ?
pll->csi2.lanes : 1)
- * vt_op_binning_div * pll->scale_m);
+ * vt_op_binning_div * pll->scale_m
+ * PHY_CONST_DIV);
/* Find smallest and biggest allowed vt divisor. */
dev_dbg(dev, "min_vt_div: %u\n", min_vt_div);
@@ -408,6 +415,8 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
const struct ccs_pll_branch_limits_bk *op_lim_bk = &lim->op_bk;
struct ccs_pll_branch_fr *op_pll_fr = &pll->vt_fr;
struct ccs_pll_branch_bk *op_pll_bk = &pll->op_bk;
+ bool cphy = pll->bus_type == CCS_PLL_BUS_TYPE_CSI2_CPHY;
+ uint32_t phy_const = cphy ? CPHY_CONST : DPHY_CONST;
uint16_t min_op_pre_pll_clk_div;
uint16_t max_op_pre_pll_clk_div;
uint32_t mul, div;
@@ -465,14 +474,21 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
* (pll->flags & CCS_PLL_FLAG_LANE_SPEED_MODEL ?
1 : pll->csi2.lanes);
break;
+ case CCS_PLL_BUS_TYPE_CSI2_CPHY:
+ op_pll_bk->sys_clk_freq_hz =
+ pll->link_freq
+ * (pll->flags & CCS_PLL_FLAG_LANE_SPEED_MODEL ?
+ 1 : pll->csi2.lanes);
+ break;
default:
return -EINVAL;
}
pll->pixel_rate_csi =
- op_pll_bk->sys_clk_freq_hz
- * (pll->flags & CCS_PLL_FLAG_LANE_SPEED_MODEL ?
- pll->csi2.lanes : 1) / pll->bits_per_pixel / l;
+ div_u64((uint64_t)op_pll_bk->sys_clk_freq_hz
+ * (pll->flags & CCS_PLL_FLAG_LANE_SPEED_MODEL ?
+ pll->csi2.lanes : 1) * PHY_CONST_DIV,
+ phy_const * pll->bits_per_pixel * l);
/* Figure out limits for OP pre-pll divider based on extclk */
dev_dbg(dev, "min / max op_pre_pll_clk_div: %u / %u\n",
@@ -510,7 +526,8 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
(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);
+ op_pll_fr, op_pll_bk, mul, div, l,
+ cphy, phy_const);
if (rval)
continue;
--
2.27.0
