diff mbox series

[v2,08/11] media: ccs-pll: Add a flag for even PLL multipliers

Message ID 20250417065354.311617-9-sakari.ailus@linux.intel.com
State New
Headers show
Series CCS PLL fixes and improvements | expand

Commit Message

Sakari Ailus April 17, 2025, 6:53 a.m. UTC 
Some devices (not entirely CCS compliant) only support even PLL
multipliers. Add support for this through a PLL flag.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/i2c/ccs-pll.c | 11 ++++++++++-
 drivers/media/i2c/ccs-pll.h |  1 +
 2 files changed, 11 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c
index ebbc5e323244..3f8153fb4af0 100644
--- a/drivers/media/i2c/ccs-pll.c
+++ b/drivers/media/i2c/ccs-pll.c
@@ -124,9 +124,10 @@  static void print_pll(struct device *dev, const struct ccs_pll *pll)
 	dev_dbg(dev, "pixel rate on CSI-2 bus:\t%u\n",
 		pll->pixel_rate_csi);
 
-	dev_dbg(dev, "flags%s%s%s%s%s%s%s%s%s%s\n",
+	dev_dbg(dev, "flags%s%s%s%s%s%s%s%s%s%s%s\n",
 		pll->flags & PLL_FL(OP_PIX_CLOCK_PER_LANE) ? " op-pix-clock-per-lane" : "",
 		pll->flags & PLL_FL(NO_OP_CLOCKS) ? " no-op-clocks" : "",
+		pll->flags & PLL_FL(EVEN_PLL_MULTIPLIER) ? " even-pll-multiplier" : "",
 		pll->flags & PLL_FL(LANE_SPEED_MODEL) ? " lane-speed" : "",
 		pll->flags & PLL_FL(EXT_IP_PLL_DIVIDER) ?
 		" ext-ip-pll-divider" : "",
@@ -312,6 +313,10 @@  __ccs_pll_calculate_vt_tree(struct device *dev,
 	more_mul *= DIV_ROUND_UP(lim_fr->min_pll_multiplier, mul * more_mul);
 	dev_dbg(dev, "more_mul2: %u\n", more_mul);
 
+	if (pll->flags & CCS_PLL_FLAG_EVEN_PLL_MULTIPLIER &&
+	    mul & 1 && more_mul & 1)
+		more_mul <<= 1;
+
 	pll_fr->pll_multiplier = mul * more_mul;
 	if (pll_fr->pll_multiplier > lim_fr->max_pll_multiplier) {
 		dev_dbg(dev, "pll multiplier %u too high\n",
@@ -668,6 +673,10 @@  ccs_pll_calculate_op(struct device *dev, const struct ccs_pll_limits *lim,
 	if (!is_one_or_even(i))
 		i <<= 1;
 
+	if (pll->flags & CCS_PLL_FLAG_EVEN_PLL_MULTIPLIER &&
+	    mul & 1 && i & 1)
+		i <<= 1;
+
 	dev_dbg(dev, "final more_mul: %u\n", i);
 	if (i > more_mul_max) {
 		dev_dbg(dev, "final more_mul is bad, max %u\n", more_mul_max);
diff --git a/drivers/media/i2c/ccs-pll.h b/drivers/media/i2c/ccs-pll.h
index ee206e5b287b..e8297db45460 100644
--- a/drivers/media/i2c/ccs-pll.h
+++ b/drivers/media/i2c/ccs-pll.h
@@ -31,6 +31,7 @@ 
 #define CCS_PLL_FLAG_DUAL_PLL					BIT(8)
 #define CCS_PLL_FLAG_OP_SYS_DDR					BIT(9)
 #define CCS_PLL_FLAG_OP_PIX_DDR					BIT(10)
+#define CCS_PLL_FLAG_EVEN_PLL_MULTIPLIER			BIT(11)
 
 /**
  * struct ccs_pll_branch_fr - CCS PLL configuration (front)