[PATCH 33/38] ccs: Dual PLL support

[Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>]

Add support for sensors that either require dual PLL or support single or
dual PLL but use dual PLL as default.

Use sensor default configuration for sensors that support both modes.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
 drivers/media/i2c/ccs-pll.c      |  9 +++++--
 drivers/media/i2c/ccs/ccs-core.c | 45 +++++++++++++++++++++++++++++++-
 2 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c
index 91b578a05a98..7df7b96e78e6 100644
--- a/drivers/media/i2c/ccs-pll.c
+++ b/drivers/media/i2c/ccs-pll.c
@@ -331,7 +331,10 @@ __ccs_pll_calculate_vt_tree(struct device *dev,
 			continue;
 		}
 
-		if (pix_div * sys_div <= best_div) {
+		dev_dbg(dev, "sys/pix/best_pix: %u,%u,%u\n", sys_div, pix_div,
+			best_pix_div);
+
+		if (pix_div * sys_div <= best_pix_div) {
 			best_pix_div = pix_div;
 			best_div = pix_div * sys_div;
 		}
@@ -804,7 +807,9 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
 		if (rval)
 			continue;
 
-		rval = check_fr_bounds(dev, lim, pll, PLL_VT);
+		rval = check_fr_bounds(dev, lim, pll,
+				       pll->flags & CCS_PLL_FLAG_DUAL_PLL ?
+				       PLL_OP : PLL_VT);
 		if (rval)
 			continue;
 
diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c
index 849c1001e3cc..137d951b551a 100644
--- a/drivers/media/i2c/ccs/ccs-core.c
+++ b/drivers/media/i2c/ccs/ccs-core.c
@@ -396,7 +396,23 @@ static int ccs_pll_configure(struct ccs_sensor *sensor)
 	if (rval < 0)
 		return rval;
 
-	return ccs_write(sensor, OP_SYS_CLK_DIV, pll->op_bk.sys_clk_div);
+	rval = ccs_write(sensor, OP_SYS_CLK_DIV, pll->op_bk.sys_clk_div);
+	if (rval < 0)
+		return rval;
+
+	if (!(pll->flags & CCS_PLL_FLAG_DUAL_PLL))
+		return 0;
+
+	rval = ccs_write(sensor, PLL_MODE, CCS_PLL_MODE_DUAL);
+	if (rval < 0)
+		return rval;
+
+	rval = ccs_write(sensor, OP_PRE_PLL_CLK_DIV,
+			 pll->op_fr.pre_pll_clk_div);
+	if (rval < 0)
+		return rval;
+
+	return ccs_write(sensor, OP_PLL_MULTIPLIER, pll->op_fr.pll_multiplier);
 }
 
 static int ccs_pll_try(struct ccs_sensor *sensor, struct ccs_pll *pll)
@@ -413,6 +429,16 @@ static int ccs_pll_try(struct ccs_sensor *sensor, struct ccs_pll *pll)
 			.min_pll_op_clk_freq_hz = CCS_LIM(sensor, MIN_PLL_OP_CLK_FREQ_MHZ),
 			.max_pll_op_clk_freq_hz = CCS_LIM(sensor, MAX_PLL_OP_CLK_FREQ_MHZ),
 		},
+		.op_fr = {
+			.min_pre_pll_clk_div = CCS_LIM(sensor, MIN_OP_PRE_PLL_CLK_DIV),
+			.max_pre_pll_clk_div = CCS_LIM(sensor, MAX_OP_PRE_PLL_CLK_DIV),
+			.min_pll_ip_clk_freq_hz = CCS_LIM(sensor, MIN_OP_PLL_IP_CLK_FREQ_MHZ),
+			.max_pll_ip_clk_freq_hz = CCS_LIM(sensor, MAX_OP_PLL_IP_CLK_FREQ_MHZ),
+			.min_pll_multiplier = CCS_LIM(sensor, MIN_OP_PLL_MULTIPLIER),
+			.max_pll_multiplier = CCS_LIM(sensor, MAX_OP_PLL_MULTIPLIER),
+			.min_pll_op_clk_freq_hz = CCS_LIM(sensor, MIN_OP_PLL_OP_CLK_FREQ_MHZ),
+			.max_pll_op_clk_freq_hz = CCS_LIM(sensor, MAX_OP_PLL_OP_CLK_FREQ_MHZ),
+		},
 		.op_bk = {
 			 .min_sys_clk_div = CCS_LIM(sensor, MIN_OP_SYS_CLK_DIV),
 			 .max_sys_clk_div = CCS_LIM(sensor, MAX_OP_SYS_CLK_DIV),
@@ -3232,6 +3258,23 @@ static int ccs_probe(struct i2c_client *client)
 	    CCS_FIFO_SUPPORT_CAPABILITY_DERATING_OVERRATING)
 		sensor->pll.flags |= CCS_PLL_FLAG_FIFO_DERATING |
 				     CCS_PLL_FLAG_FIFO_OVERRATING;
+	if (CCS_LIM(sensor, CLOCK_TREE_PLL_CAPABILITY) &
+	    CCS_CLOCK_TREE_PLL_CAPABILITY_DUAL_PLL) {
+		if (CCS_LIM(sensor, CLOCK_TREE_PLL_CAPABILITY) &
+		    CCS_CLOCK_TREE_PLL_CAPABILITY_SINGLE_PLL) {
+			u32 v;
+
+			/* Use sensor default in PLL mode selection */
+			rval = ccs_read(sensor, PLL_MODE, &v);
+			if (rval)
+				goto out_cleanup;
+
+			if (v == CCS_PLL_MODE_DUAL)
+				sensor->pll.flags |= CCS_PLL_FLAG_DUAL_PLL;
+		} else {
+			sensor->pll.flags |= CCS_PLL_FLAG_DUAL_PLL;
+		}
+	}
 	sensor->pll.op_bits_per_lane = CCS_LIM(sensor, OP_BITS_PER_LANE);
 	sensor->pll.ext_clk_freq_hz = sensor->hwcfg.ext_clk;
 	sensor->pll.scale_n = CCS_LIM(sensor, SCALER_N_MIN);
-- 
2.27.0