Hi Ezequiel,
On Wed, Jul 10, 2019 at 03:40:00PM -0300, Ezequiel Garcia wrote:
> This is mostly a port of Jacopo's fix:
>
> commit aa4bb8b8838ffcc776a79f49a4d7476b82405349
> Author: Jacopo Mondi <jacopo@xxxxxxxxxx>
> Date: Fri Jul 6 05:51:52 2018 -0400
>
> media: ov5640: Re-work MIPI startup sequence
>
> In the OV5645 case, the changes are:
>
> - Move OV5645_IO_MIPI_CTRL00 (0x300e) out of the initial setting blob.
You should change this, as I still see this part of the initial
settings blob.
Apart from that
Reviewed-by: Jacopo Mondi <jacopo@xxxxxxxxxx>
Thanks
j
> - At set_power(1) time power up MIPI Tx/Rx and set data and clock lanes in
> LP11 during 'sleep' and 'idle' with MIPI clock in non-continuous mode.
> - At set_power(0) time power down MIPI Tx/Rx (in addition to the current
> power down of regulators and clock gating).
> - At s_stream time enable/disable the MIPI interface output.
>
> With this commit the sensor is able to enter LP-11 mode during power up,
> as expected by some CSI-2 controllers.
>
> Many thanks to Fabio Estevam for his help debugging this issue.
>
> Tested-by: Fabio Estevam <festevam@xxxxxxxxx>
> Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
> ---
> Changes in v2:
> * As suggested by Philipp, move the initial configuration
> to the ov5645_global_init_setting array.
> ---
> drivers/media/i2c/ov5645.c | 26 ++++++++++++++++++--------
> 1 file changed, 18 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
> index 124c8df04633..58972c884705 100644
> --- a/drivers/media/i2c/ov5645.c
> +++ b/drivers/media/i2c/ov5645.c
> @@ -45,6 +45,8 @@
> #define OV5645_CHIP_ID_HIGH_BYTE 0x56
> #define OV5645_CHIP_ID_LOW 0x300b
> #define OV5645_CHIP_ID_LOW_BYTE 0x45
> +#define OV5645_IO_MIPI_CTRL00 0x300e
> +#define OV5645_PAD_OUTPUT00 0x3019
> #define OV5645_AWB_MANUAL_CONTROL 0x3406
> #define OV5645_AWB_MANUAL_ENABLE BIT(0)
> #define OV5645_AEC_PK_MANUAL 0x3503
> @@ -55,6 +57,7 @@
> #define OV5645_ISP_VFLIP BIT(2)
> #define OV5645_TIMING_TC_REG21 0x3821
> #define OV5645_SENSOR_MIRROR BIT(1)
> +#define OV5645_MIPI_CTRL00 0x4800
> #define OV5645_PRE_ISP_TEST_SETTING_1 0x503d
> #define OV5645_TEST_PATTERN_MASK 0x3
> #define OV5645_SET_TEST_PATTERN(x) ((x) & OV5645_TEST_PATTERN_MASK)
> @@ -121,7 +124,6 @@ static const struct reg_value ov5645_global_init_setting[] = {
> { 0x3503, 0x07 },
> { 0x3002, 0x1c },
> { 0x3006, 0xc3 },
> - { 0x300e, 0x45 },
> { 0x3017, 0x00 },
> { 0x3018, 0x00 },
> { 0x302e, 0x0b },
> @@ -350,7 +352,10 @@ static const struct reg_value ov5645_global_init_setting[] = {
> { 0x3a1f, 0x14 },
> { 0x0601, 0x02 },
> { 0x3008, 0x42 },
> - { 0x3008, 0x02 }
> + { 0x3008, 0x02 },
> + { OV5645_IO_MIPI_CTRL00, 0x40 },
> + { OV5645_MIPI_CTRL00, 0x24 },
> + { OV5645_PAD_OUTPUT00, 0x70 }
> };
>
> static const struct reg_value ov5645_setting_sxga[] = {
> @@ -737,13 +742,9 @@ static int ov5645_s_power(struct v4l2_subdev *sd, int on)
> goto exit;
> }
>
> - ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
> - OV5645_SYSTEM_CTRL0_STOP);
> - if (ret < 0) {
> - ov5645_set_power_off(ov5645);
> - goto exit;
> - }
> + usleep_range(500, 1000);
> } else {
> + ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x58);
> ov5645_set_power_off(ov5645);
> }
> }
> @@ -1049,11 +1050,20 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
> dev_err(ov5645->dev, "could not sync v4l2 controls\n");
> return ret;
> }
> +
> + ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x45);
> + if (ret < 0)
> + return ret;
> +
> ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
> OV5645_SYSTEM_CTRL0_START);
> if (ret < 0)
> return ret;
> } else {
> + ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x40);
> + if (ret < 0)
> + return ret;
> +
> ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
> OV5645_SYSTEM_CTRL0_STOP);
> if (ret < 0)
> --
> 2.20.1
>
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