Re: [PATCH v2 32/55] media: rkisp1: isp: Move input configuration to rkisp1_config_isp()

[Dafna Hirschfeld <dafna@fastmail.com>]

On 01.07.2022 02:06, Laurent Pinchart wrote:
>The ISP_ACQ_PROP register is set twice, once in rkisp1_config_isp() for
>most of its fields, and once in rkisp1_config_dvp() (called from
>rkisp1_config_path()) to configure the input selection field. Move the
>latter to rkisp1_config_isp() to write the register once only, and drop
>the now empty rkisp1_config_dvp() function.
>
>Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Reviewed-by Dafna Hirschfeld <dafna@fastmail.com>

>---
>Changes since v1:
>
>- Print the value of unsupported bus width
>- Remove unneeded curly braces
>---
> .../platform/rockchip/rkisp1/rkisp1-isp.c     | 66 +++++++------------
> 1 file changed, 24 insertions(+), 42 deletions(-)
>
>diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
>index 9b32ae585de8..85c1995bb5c2 100644
>--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
>+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
>@@ -141,7 +141,7 @@ static int rkisp1_config_isp(struct rkisp1_isp *isp,
> 			     enum v4l2_mbus_type mbus_type, u32 mbus_flags)
> {
> 	struct rkisp1_device *rkisp1 = isp->rkisp1;
>-	u32 isp_ctrl = 0, irq_mask = 0, acq_mult = 0, signal = 0;
>+	u32 isp_ctrl = 0, irq_mask = 0, acq_mult = 0, signal = 0, input_sel = 0;
> 	const struct rkisp1_mbus_info *src_fmt, *sink_fmt;
> 	struct v4l2_mbus_framefmt *sink_frm;
> 	struct v4l2_rect *sink_crop;
>@@ -189,6 +189,22 @@ static int rkisp1_config_isp(struct rkisp1_isp *isp,
> 	if (mbus_type == V4L2_MBUS_BT656 || mbus_type == V4L2_MBUS_PARALLEL) {
> 		if (mbus_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
> 			signal = RKISP1_CIF_ISP_ACQ_PROP_POS_EDGE;
>+
>+		switch (sink_fmt->bus_width) {
>+		case 8:
>+			input_sel = RKISP1_CIF_ISP_ACQ_PROP_IN_SEL_8B_ZERO;
>+			break;
>+		case 10:
>+			input_sel = RKISP1_CIF_ISP_ACQ_PROP_IN_SEL_10B_ZERO;
>+			break;
>+		case 12:
>+			input_sel = RKISP1_CIF_ISP_ACQ_PROP_IN_SEL_12B;
>+			break;
>+		default:
>+			dev_err(rkisp1->dev, "Invalid bus width %u\n",
>+				sink_fmt->bus_width);
>+			return -EINVAL;
>+		}
> 	}
>
> 	if (mbus_type == V4L2_MBUS_PARALLEL) {
>@@ -201,7 +217,7 @@ static int rkisp1_config_isp(struct rkisp1_isp *isp,
>
> 	rkisp1_write(rkisp1, RKISP1_CIF_ISP_CTRL, isp_ctrl);
> 	rkisp1_write(rkisp1, RKISP1_CIF_ISP_ACQ_PROP,
>-		     signal | sink_fmt->yuv_seq |
>+		     signal | sink_fmt->yuv_seq | input_sel |
> 		     RKISP1_CIF_ISP_ACQ_PROP_BAYER_PAT(sink_fmt->bayer_pat) |
> 		     RKISP1_CIF_ISP_ACQ_PROP_FIELD_SEL_ALL);
> 	rkisp1_write(rkisp1, RKISP1_CIF_ISP_ACQ_NR_FRAMES, 0);
>@@ -238,52 +254,19 @@ static int rkisp1_config_isp(struct rkisp1_isp *isp,
> 	return 0;
> }
>
>-static int rkisp1_config_dvp(struct rkisp1_isp *isp)
>-{
>-	struct rkisp1_device *rkisp1 = isp->rkisp1;
>-	const struct rkisp1_mbus_info *sink_fmt = isp->sink_fmt;
>-	u32 val, input_sel;
>-
>-	switch (sink_fmt->bus_width) {
>-	case 8:
>-		input_sel = RKISP1_CIF_ISP_ACQ_PROP_IN_SEL_8B_ZERO;
>-		break;
>-	case 10:
>-		input_sel = RKISP1_CIF_ISP_ACQ_PROP_IN_SEL_10B_ZERO;
>-		break;
>-	case 12:
>-		input_sel = RKISP1_CIF_ISP_ACQ_PROP_IN_SEL_12B;
>-		break;
>-	default:
>-		dev_err(rkisp1->dev, "Invalid bus width\n");
>-		return -EINVAL;
>-	}
>-
>-	val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_ACQ_PROP);
>-	rkisp1_write(rkisp1, RKISP1_CIF_ISP_ACQ_PROP, val | input_sel);
>-
>-	return 0;
>-}
>-
> /* Configure MUX */
>-static int rkisp1_config_path(struct rkisp1_isp *isp,
>-			      enum v4l2_mbus_type mbus_type)
>+static void rkisp1_config_path(struct rkisp1_isp *isp,
>+			       enum v4l2_mbus_type mbus_type)
> {
> 	struct rkisp1_device *rkisp1 = isp->rkisp1;
> 	u32 dpcl = rkisp1_read(rkisp1, RKISP1_CIF_VI_DPCL);
>-	int ret = 0;
>
>-	if (mbus_type == V4L2_MBUS_BT656 ||
>-	    mbus_type == V4L2_MBUS_PARALLEL) {
>-		ret = rkisp1_config_dvp(isp);
>+	if (mbus_type == V4L2_MBUS_BT656 || mbus_type == V4L2_MBUS_PARALLEL)
> 		dpcl |= RKISP1_CIF_VI_DPCL_IF_SEL_PARALLEL;
>-	} else if (mbus_type == V4L2_MBUS_CSI2_DPHY) {
>+	else if (mbus_type == V4L2_MBUS_CSI2_DPHY)
> 		dpcl |= RKISP1_CIF_VI_DPCL_IF_SEL_MIPI;
>-	}
>
> 	rkisp1_write(rkisp1, RKISP1_CIF_VI_DPCL, dpcl);
>-
>-	return ret;
> }
>
> /* Hardware configure Entry */
>@@ -295,9 +278,8 @@ static int rkisp1_config_cif(struct rkisp1_isp *isp,
> 	ret = rkisp1_config_isp(isp, mbus_type, mbus_flags);
> 	if (ret)
> 		return ret;
>-	ret = rkisp1_config_path(isp, mbus_type);
>-	if (ret)
>-		return ret;
>+
>+	rkisp1_config_path(isp, mbus_type);
> 	rkisp1_config_ism(isp);
>
> 	return 0;
>-- 
>Regards,
>
>Laurent Pinchart
>
>
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