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openwrt/target/linux/bcm27xx/patches-6.1/950-0665-media-i2c-imx290-Add-support-for-74.25MHz-external-c.patch
Álvaro Fernández Rojas 793f8ab62c bcm27xx: 6.1: add kernel patches 
Add kernel patches for version 6.1.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-06-09 19:12:30 +02:00

275 lines
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From dcef754861ddd47e88f722abefc768410f1a17d1 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 16 Feb 2023 00:30:01 +0200
Subject: [PATCH] media: i2c: imx290: Add support for 74.25MHz external
clock
Should be upstream commit b8b86dfe1aee
The sensor supports either a 37.125 or 74.25MHz external, but
the driver only supported 37.125MHz.
Add the relevant register configuration for either clock
frequency option.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
drivers/media/i2c/imx290.c | 132 ++++++++++++++++++++++++++++++++-----
1 file changed, 116 insertions(+), 16 deletions(-)
--- a/drivers/media/i2c/imx290.c
+++ b/drivers/media/i2c/imx290.c
@@ -105,6 +105,7 @@
#define IMX290_TCLKPREPARE IMX290_REG_16BIT(0x3452)
#define IMX290_TLPX IMX290_REG_16BIT(0x3454)
#define IMX290_X_OUT_SIZE IMX290_REG_16BIT(0x3472)
+#define IMX290_INCKSEL7 IMX290_REG_8BIT(0x3480)
#define IMX290_PGCTRL_REGEN BIT(0)
#define IMX290_PGCTRL_THRU BIT(1)
@@ -181,11 +182,29 @@ struct imx290_model_info {
enum imx290_colour_variant colour_variant;
};
+enum imx290_clk_freq {
+ IMX290_CLK_37_125,
+ IMX290_CLK_74_25,
+ IMX290_NUM_CLK
+};
+
struct imx290_regval {
u32 reg;
u32 val;
};
+/*
+ * Clock configuration for registers INCKSEL1 to INCKSEL6.
+ */
+struct imx290_clk_cfg {
+ u8 incksel1;
+ u8 incksel2;
+ u8 incksel3;
+ u8 incksel4;
+ u8 incksel5;
+ u8 incksel6;
+};
+
struct imx290_mode {
u32 width;
u32 height;
@@ -195,6 +214,8 @@ struct imx290_mode {
const struct imx290_regval *data;
u32 data_size;
+
+ const struct imx290_clk_cfg *clk_cfg;
};
struct imx290_csi_cfg {
@@ -213,6 +234,7 @@ struct imx290 {
struct device *dev;
struct clk *xclk;
struct regmap *regmap;
+ enum imx290_clk_freq xclk_idx;
u8 nlanes;
const struct imx290_model_info *model;
@@ -241,7 +263,6 @@ static inline struct imx290 *to_imx290(s
*/
static const struct imx290_regval imx290_global_init_settings[] = {
- { IMX290_EXTCK_FREQ, 0x2520 },
{ IMX290_WINWV_OB, 12 },
{ IMX290_WINPH, 0 },
{ IMX290_WINPV, 0 },
@@ -291,7 +312,18 @@ static const struct imx290_regval imx290
{ IMX290_REG_8BIT(0x33b0), 0x50 },
{ IMX290_REG_8BIT(0x33b2), 0x1a },
{ IMX290_REG_8BIT(0x33b3), 0x04 },
- { IMX290_REG_8BIT(0x3480), 0x49 },
+};
+
+#define IMX290_NUM_CLK_REGS 2
+static const struct imx290_regval xclk_regs[][IMX290_NUM_CLK_REGS] = {
+ [IMX290_CLK_37_125] = {
+ { IMX290_EXTCK_FREQ, (37125 * 256) / 1000 },
+ { IMX290_INCKSEL7, 0x49 },
+ },
+ [IMX290_CLK_74_25] = {
+ { IMX290_EXTCK_FREQ, (74250 * 256) / 1000 },
+ { IMX290_INCKSEL7, 0x92 },
+ },
};
static const struct imx290_regval imx290_1080p_settings[] = {
@@ -301,12 +333,6 @@ static const struct imx290_regval imx290
{ IMX290_OPB_SIZE_V, 10 },
{ IMX290_X_OUT_SIZE, 1920 },
{ IMX290_Y_OUT_SIZE, 1080 },
- { IMX290_INCKSEL1, 0x18 },
- { IMX290_INCKSEL2, 0x03 },
- { IMX290_INCKSEL3, 0x20 },
- { IMX290_INCKSEL4, 0x01 },
- { IMX290_INCKSEL5, 0x1a },
- { IMX290_INCKSEL6, 0x1a },
};
static const struct imx290_regval imx290_720p_settings[] = {
@@ -316,12 +342,6 @@ static const struct imx290_regval imx290
{ IMX290_OPB_SIZE_V, 4 },
{ IMX290_X_OUT_SIZE, 1280 },
{ IMX290_Y_OUT_SIZE, 720 },
- { IMX290_INCKSEL1, 0x20 },
- { IMX290_INCKSEL2, 0x00 },
- { IMX290_INCKSEL3, 0x20 },
- { IMX290_INCKSEL4, 0x01 },
- { IMX290_INCKSEL5, 0x1a },
- { IMX290_INCKSEL6, 0x1a },
};
static const struct imx290_regval imx290_10bit_settings[] = {
@@ -427,6 +447,48 @@ static inline int imx290_link_freqs_num(
return ARRAY_SIZE(imx290_link_freq_4lanes);
}
+static const struct imx290_clk_cfg imx290_1080p_clock_config[] = {
+ [IMX290_CLK_37_125] = {
+ /* 37.125MHz clock config */
+ .incksel1 = 0x18,
+ .incksel2 = 0x03,
+ .incksel3 = 0x20,
+ .incksel4 = 0x01,
+ .incksel5 = 0x1a,
+ .incksel6 = 0x1a,
+ },
+ [IMX290_CLK_74_25] = {
+ /* 74.25MHz clock config */
+ .incksel1 = 0x0c,
+ .incksel2 = 0x03,
+ .incksel3 = 0x10,
+ .incksel4 = 0x01,
+ .incksel5 = 0x1b,
+ .incksel6 = 0x1b,
+ },
+};
+
+static const struct imx290_clk_cfg imx290_720p_clock_config[] = {
+ [IMX290_CLK_37_125] = {
+ /* 37.125MHz clock config */
+ .incksel1 = 0x20,
+ .incksel2 = 0x00,
+ .incksel3 = 0x20,
+ .incksel4 = 0x01,
+ .incksel5 = 0x1a,
+ .incksel6 = 0x1a,
+ },
+ [IMX290_CLK_74_25] = {
+ /* 74.25MHz clock config */
+ .incksel1 = 0x10,
+ .incksel2 = 0x00,
+ .incksel3 = 0x10,
+ .incksel4 = 0x01,
+ .incksel5 = 0x1b,
+ .incksel6 = 0x1b,
+ },
+};
+
/* Mode configs */
static const struct imx290_mode imx290_modes_2lanes[] = {
{
@@ -437,6 +499,7 @@ static const struct imx290_mode imx290_m
.link_freq_index = FREQ_INDEX_1080P,
.data = imx290_1080p_settings,
.data_size = ARRAY_SIZE(imx290_1080p_settings),
+ .clk_cfg = imx290_1080p_clock_config,
},
{
.width = 1280,
@@ -446,6 +509,7 @@ static const struct imx290_mode imx290_m
.link_freq_index = FREQ_INDEX_720P,
.data = imx290_720p_settings,
.data_size = ARRAY_SIZE(imx290_720p_settings),
+ .clk_cfg = imx290_720p_clock_config,
},
};
@@ -458,6 +522,7 @@ static const struct imx290_mode imx290_m
.link_freq_index = FREQ_INDEX_1080P,
.data = imx290_1080p_settings,
.data_size = ARRAY_SIZE(imx290_1080p_settings),
+ .clk_cfg = imx290_1080p_clock_config,
},
{
.width = 1280,
@@ -467,6 +532,7 @@ static const struct imx290_mode imx290_m
.link_freq_index = FREQ_INDEX_720P,
.data = imx290_720p_settings,
.data_size = ARRAY_SIZE(imx290_720p_settings),
+ .clk_cfg = imx290_720p_clock_config,
},
};
@@ -592,6 +658,26 @@ static int imx290_set_register_array(str
return 0;
}
+static int imx290_set_clock(struct imx290 *imx290)
+{
+ const struct imx290_mode *mode = imx290->current_mode;
+ enum imx290_clk_freq clk_idx = imx290->xclk_idx;
+ const struct imx290_clk_cfg *clk_cfg = &mode->clk_cfg[clk_idx];
+ int ret;
+
+ ret = imx290_set_register_array(imx290, xclk_regs[clk_idx],
+ IMX290_NUM_CLK_REGS);
+
+ imx290_write(imx290, IMX290_INCKSEL1, clk_cfg->incksel1, &ret);
+ imx290_write(imx290, IMX290_INCKSEL2, clk_cfg->incksel2, &ret);
+ imx290_write(imx290, IMX290_INCKSEL3, clk_cfg->incksel3, &ret);
+ imx290_write(imx290, IMX290_INCKSEL4, clk_cfg->incksel4, &ret);
+ imx290_write(imx290, IMX290_INCKSEL5, clk_cfg->incksel5, &ret);
+ imx290_write(imx290, IMX290_INCKSEL6, clk_cfg->incksel6, &ret);
+
+ return ret;
+}
+
static int imx290_set_data_lanes(struct imx290 *imx290)
{
int ret = 0;
@@ -896,6 +982,13 @@ static int imx290_start_streaming(struct
return ret;
}
+ /* Set clock parameters based on mode and xclk */
+ ret = imx290_set_clock(imx290);
+ if (ret < 0) {
+ dev_err(imx290->dev, "Could not set clocks\n");
+ return ret;
+ }
+
/* Set data lane count */
ret = imx290_set_data_lanes(imx290);
if (ret < 0) {
@@ -1295,8 +1388,15 @@ static int imx290_init_clk(struct imx290
return ret;
}
- /* external clock must be 37.125 MHz */
- if (xclk_freq != 37125000) {
+ /* external clock must be 37.125 MHz or 74.25MHz */
+ switch (xclk_freq) {
+ case 37125000:
+ imx290->xclk_idx = IMX290_CLK_37_125;
+ break;
+ case 74250000:
+ imx290->xclk_idx = IMX290_CLK_74_25;
+ break;
+ default:
dev_err(imx290->dev, "External clock frequency %u is not supported\n",
xclk_freq);
return -EINVAL;
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