[PATCH v4 19/25] media: i2c: imx258: Change register settings for variants of the sensor

git
2024-04-14T20:36:55Z

Sony have advised that there are variants of the IMX258 sensor which
require slightly different register configuration to the mainline
imx258 driver defaults.

There is no available run-time detection for the variant, so add
configuration via the DT compatible string.

The Vision Components imx258 module supports PDAF, so add the
register differences for that variant

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Luis Garcia <git@luigi311.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
---
drivers/media/i2c/imx258.c | 47 ++++++++++++++++++++++++++++++++++----
1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index 32267d36b8f3..54f7625e60a3 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -321,8 +321,6 @@ static const struct imx258_reg mipi_642mbps_24mhz_4l[] = {

static const struct imx258_reg mode_common_regs[] = {
{ 0x3051, 0x00 },
- { 0x3052, 0x00 },
- { 0x4E21, 0x14 },
{ 0x6B11, 0xCF },
{ 0x7FF0, 0x08 },
{ 0x7FF1, 0x0F },
@@ -345,7 +343,6 @@ static const struct imx258_reg mode_common_regs[] = {
{ 0x7FA8, 0x03 },
{ 0x7FA9, 0xFE },
{ 0x7B24, 0x81 },
- { 0x7B25, 0x00 },
{ 0x6564, 0x07 },
{ 0x6B0D, 0x41 },
{ 0x653D, 0x04 },
@@ -460,6 +457,33 @@ static const struct imx258_reg mode_1048_780_regs[] = {
{ 0x034F, 0x0C },
};

+struct imx258_variant_cfg {
+ const struct imx258_reg *regs;
+ unsigned int num_regs;
+};
+
+static const struct imx258_reg imx258_cfg_regs[] = {
+ { 0x3052, 0x00 },
+ { 0x4E21, 0x14 },
+ { 0x7B25, 0x00 },
+};
+
+static const struct imx258_variant_cfg imx258_cfg = {
+ .regs = imx258_cfg_regs,
+ .num_regs = ARRAY_SIZE(imx258_cfg_regs),
+};
+
+static const struct imx258_reg imx258_pdaf_cfg_regs[] = {
+ { 0x3052, 0x01 },
+ { 0x4E21, 0x10 },
+ { 0x7B25, 0x01 },
+};
+
+static const struct imx258_variant_cfg imx258_pdaf_cfg = {
+ .regs = imx258_pdaf_cfg_regs,
+ .num_regs = ARRAY_SIZE(imx258_pdaf_cfg_regs),
+};
+
static const char * const imx258_test_pattern_menu[] = {
"Disabled",
"Solid Colour",
@@ -637,6 +661,8 @@ struct imx258 {
struct v4l2_subdev sd;
struct media_pad pad;

+ const struct imx258_variant_cfg *variant_cfg;
+
struct v4l2_ctrl_handler ctrl_handler;
/* V4L2 Controls */
struct v4l2_ctrl *link_freq;
@@ -1104,6 +1130,14 @@ static int imx258_start_streaming(struct imx258 *imx258)
return ret;
}

+ ret = imx258_write_regs(imx258, imx258->variant_cfg->regs,
+ imx258->variant_cfg->num_regs);
+ if (ret) {
+ dev_err(&client->dev, "%s failed to set variant config\n",
+ __func__);
+ return ret;
+ }
+
ret = imx258_write_reg(imx258, IMX258_CLK_BLANK_STOP,
IMX258_REG_VALUE_08BIT,
!!(imx258->csi2_flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK));
@@ -1491,6 +1525,10 @@ static int imx258_probe(struct i2c_client *client)

imx258->csi2_flags = ep.bus.mipi_csi2.flags;

+ imx258->variant_cfg = device_get_match_data(&client->dev);
+ if (!imx258->variant_cfg)
+ imx258->variant_cfg = &imx258_cfg;
+
/* Initialize subdev */
v4l2_i2c_subdev_init(&imx258->sd, client, &imx258_subdev_ops);

@@ -1578,7 +1616,8 @@ MODULE_DEVICE_TABLE(acpi, imx258_acpi_ids);
#endif

static const struct of_device_id imx258_dt_ids[] = {
- { .compatible = "sony,imx258" },
+ { .compatible = "sony,imx258", .data = &imx258_cfg },
+ { .compatible = "sony,imx258-pdaf", .data = &imx258_pdaf_cfg },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx258_dt_ids);
--
2.44.0