Am Sonntag, dem 16.05.2021 um 05:42 +0300 schrieb Laurent Pinchart:
> Sample code from NXP, as well as experiments on i.MX8MM with RAW10
> capture with an OV5640 sensor connected over CSI-2, showed that the
> TWO_8BIT_SENSOR field of the CSICR3 register needs to be set for
> formats
> larger than 8 bits. Do so, even if the reference manual doesn't
> clearly
> describe the effect of the field.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/staging/media/imx/imx7-media-csi.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/staging/media/imx/imx7-media-csi.c
> b/drivers/staging/media/imx/imx7-media-csi.c
> index f85a2f5f1413..256b9aa978f0 100644
> --- a/drivers/staging/media/imx/imx7-media-csi.c
> +++ b/drivers/staging/media/imx/imx7-media-csi.c
> @@ -422,6 +422,7 @@ static void imx7_csi_configure(struct imx7_csi
> *csi)
> int width = out_pix->width;
> u32 stride = 0;
> u32 cr1, cr18;
> + u32 cr3 = 0;
>
> cr18 = imx7_csi_reg_read(csi, CSI_CSICR18);
>
> @@ -464,6 +465,7 @@ static void imx7_csi_configure(struct imx7_csi
> *csi)
> case MEDIA_BUS_FMT_SGBRG10_1X10:
> case MEDIA_BUS_FMT_SGRBG10_1X10:
> case MEDIA_BUS_FMT_SRGGB10_1X10:
> + cr3 |= BIT_TWO_8BIT_SENSOR;
> cr18 |= BIT_MIPI_DATA_FORMAT_RAW10;
> break;
> case MEDIA_BUS_FMT_Y12_1X12:
> @@ -471,6 +473,7 @@ static void imx7_csi_configure(struct imx7_csi
> *csi)
> case MEDIA_BUS_FMT_SGBRG12_1X12:
> case MEDIA_BUS_FMT_SGRBG12_1X12:
> case MEDIA_BUS_FMT_SRGGB12_1X12:
> + cr3 |= BIT_TWO_8BIT_SENSOR;
> cr18 |= BIT_MIPI_DATA_FORMAT_RAW12;
> break;
> case MEDIA_BUS_FMT_Y14_1X14:
> @@ -478,6 +481,7 @@ static void imx7_csi_configure(struct imx7_csi
> *csi)
> case MEDIA_BUS_FMT_SGBRG14_1X14:
> case MEDIA_BUS_FMT_SGRBG14_1X14:
> case MEDIA_BUS_FMT_SRGGB14_1X14:
> + cr3 |= BIT_TWO_8BIT_SENSOR;
> cr18 |= BIT_MIPI_DATA_FORMAT_RAW14;
> break;
> /*
> @@ -510,7 +514,7 @@ static void imx7_csi_configure(struct imx7_csi
> *csi)
>
> imx7_csi_reg_write(csi, cr1, CSI_CSICR1);
> imx7_csi_reg_write(csi, BIT_DMA_BURST_TYPE_RFF_INCR16,
> CSI_CSICR2);
> - imx7_csi_reg_write(csi, BIT_FRMCNT_RST, CSI_CSICR3);
> + imx7_csi_reg_write(csi, BIT_FRMCNT_RST | cr3, CSI_CSICR3);
> imx7_csi_reg_write(csi, cr18, CSI_CSICR18);
>
> imx7_csi_reg_write(csi, (width * out_pix->height) >> 2,
> CSI_CSIRXCNT);
I can confirm that BIT_TWO_8BIT_SENSOR is needed for raw10 bayer
formats for me here.
Tested-by: Martin Kepplinger <martin.kepplinger@xxxxxxx>
thanks,
martin
