IMX219: Adjust PLL settings based on the number of configured MIPI lanes

Signed-off-by: Peyton Howe <[email protected]>

Author: peyton-howe

drivers/media/i2c/imx219.c

@@ -224,15 +224,6 @@ static const struct cci_reg_sequence imx219_common_regs[] = {
 	{ CCI_REG8(0x30eb), 0x05 },
 	{ CCI_REG8(0x30eb), 0x09 },
 
-	/* PLL Clock Table */
-	{ IMX219_REG_VTPXCK_DIV, 5 },
-	{ IMX219_REG_VTSYCK_DIV, 1 },
-	{ IMX219_REG_PREPLLCK_VT_DIV, 3 },	/* 0x03 = AUTO set */
-	{ IMX219_REG_PREPLLCK_OP_DIV, 3 },	/* 0x03 = AUTO set */
-	{ IMX219_REG_PLL_VT_MPY, 57 },
-	{ IMX219_REG_OPSYCK_DIV, 1 },
-	{ IMX219_REG_PLL_OP_MPY, 114 },
-
 	/* Undocumented registers */
 	{ CCI_REG8(0x455e), 0x00 },
 	{ CCI_REG8(0x471e), 0x4b },
@@ -257,6 +248,34 @@ static const struct cci_reg_sequence imx219_common_regs[] = {
 	{ IMX219_REG_EXCK_FREQ, IMX219_EXCK_FREQ(IMX219_XCLK_FREQ / 1000000) },
 };
 
+static const struct cci_reg_sequence imx219_2lane_regs[] = {
+	/* PLL Clock Table */
+	{ IMX219_REG_VTPXCK_DIV, 5 },
+	{ IMX219_REG_VTSYCK_DIV, 1 },
+	{ IMX219_REG_PREPLLCK_VT_DIV, 3 },	/* 0x03 = AUTO set */
+	{ IMX219_REG_PREPLLCK_OP_DIV, 3 },	/* 0x03 = AUTO set */
+	{ IMX219_REG_PLL_VT_MPY, 57 },
+	{ IMX219_REG_OPSYCK_DIV, 1 },
+	{ IMX219_REG_PLL_OP_MPY, 114 },
+
+	/* 2-Lane CSI Mode */
+	{ IMX219_REG_CSI_LANE_MODE, IMX219_CSI_2_LANE_MODE },
+};
+
+static const struct cci_reg_sequence imx219_4lane_regs[] = {
+	/* PLL Clock Table */
+	{ IMX219_REG_VTPXCK_DIV, 5 },
+	{ IMX219_REG_VTSYCK_DIV, 1 },
+	{ IMX219_REG_PREPLLCK_VT_DIV, 3 },	/* 0x03 = AUTO set */
+	{ IMX219_REG_PREPLLCK_OP_DIV, 3 },	/* 0x03 = AUTO set */
+	{ IMX219_REG_PLL_VT_MPY, 88 },
+	{ IMX219_REG_OPSYCK_DIV, 1 },
+	{ IMX219_REG_PLL_OP_MPY, 91 },
+
+	/* 4-Lane CSI Mode */
+	{ IMX219_REG_CSI_LANE_MODE, IMX219_CSI_4_LANE_MODE },
+};
+
 /*
  * Register sets lifted off the i2C interface from the Raspberry Pi firmware
  * driver.
@@ -941,9 +960,11 @@ static int imx219_get_selection(struct v4l2_subdev *sd,
 
 static int imx219_configure_lanes(struct imx219 *imx219)
 {
-	return cci_write(imx219->regmap, IMX219_REG_CSI_LANE_MODE,
-			 imx219->lanes == 2 ? IMX219_CSI_2_LANE_MODE :
-			 IMX219_CSI_4_LANE_MODE, NULL);
+	/* Write the appropriate PLL settings for the number of MIPI lanes */
+	return cci_multi_reg_write(imx219->regmap,
+				  imx219->lanes == 2 ? imx219_2lane_regs : imx219_4lane_regs,
+				  imx219->lanes == 2 ? ARRAY_SIZE(imx219_2lane_regs) :
+				  ARRAY_SIZE(imx219_4lane_regs), NULL);
 };
 
 static int imx219_start_streaming(struct imx219 *imx219,
@@ -1553,4 +1574,4 @@ module_i2c_driver(imx219_i2c_driver);
 
 MODULE_AUTHOR("Dave Stevenson <[email protected]");
 MODULE_DESCRIPTION("Sony IMX219 sensor driver");
-MODULE_LICENSE("GPL v2");
+MODULE_LICENSE("GPL v2");