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From: "Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	linux-media@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
	"Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>
Subject: [PATCH 3/4] rcar-vin: Add support for V4L2_FIELD_ALTERNATE
Date: Fri,  5 Jul 2019 06:55:56 +0200	[thread overview]
Message-ID: <20190705045557.25463-4-niklas.soderlund+renesas@ragnatech.se> (raw)
In-Reply-To: <20190705045557.25463-1-niklas.soderlund+renesas@ragnatech.se>

The hardware is capable to passing V4L2_FIELD_ALTERNATE to user-space.
Allow users to request this field format but still default to using the
hardware interlacer if alternating is not explicitly requested.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-dma.c  | 54 +++++++++++----------
 drivers/media/platform/rcar-vin/rcar-v4l2.c | 31 +++++-------
 2 files changed, 42 insertions(+), 43 deletions(-)

diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 372d6b106b9970d2..7ac1733455221fe0 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -526,12 +526,17 @@ static void rvin_set_coeff(struct rvin_dev *vin, unsigned short xs)
 
 static void rvin_crop_scale_comp_gen2(struct rvin_dev *vin)
 {
+	unsigned int crop_height;
 	u32 xs, ys;
 
 	/* Set scaling coefficient */
+	crop_height = vin->crop.height;
+	if (V4L2_FIELD_IS_INTERLACED(vin->format.field))
+		crop_height *= 2;
+
 	ys = 0;
-	if (vin->crop.height != vin->compose.height)
-		ys = (4096 * vin->crop.height) / vin->compose.height;
+	if (crop_height != vin->compose.height)
+		ys = (4096 * crop_height) / vin->compose.height;
 	rvin_write(vin, ys, VNYS_REG);
 
 	xs = 0;
@@ -554,16 +559,11 @@ static void rvin_crop_scale_comp_gen2(struct rvin_dev *vin)
 	rvin_write(vin, 0, VNSPPOC_REG);
 	rvin_write(vin, 0, VNSLPOC_REG);
 	rvin_write(vin, vin->format.width - 1, VNEPPOC_REG);
-	switch (vin->format.field) {
-	case V4L2_FIELD_INTERLACED:
-	case V4L2_FIELD_INTERLACED_TB:
-	case V4L2_FIELD_INTERLACED_BT:
+
+	if (V4L2_FIELD_IS_INTERLACED(vin->format.field))
 		rvin_write(vin, vin->format.height / 2 - 1, VNELPOC_REG);
-		break;
-	default:
+	else
 		rvin_write(vin, vin->format.height - 1, VNELPOC_REG);
-		break;
-	}
 
 	vin_dbg(vin,
 		"Pre-Clip: %ux%u@%u:%u YS: %d XS: %d Post-Clip: %ux%u@%u:%u\n",
@@ -577,21 +577,9 @@ void rvin_crop_scale_comp(struct rvin_dev *vin)
 	/* Set Start/End Pixel/Line Pre-Clip */
 	rvin_write(vin, vin->crop.left, VNSPPRC_REG);
 	rvin_write(vin, vin->crop.left + vin->crop.width - 1, VNEPPRC_REG);
+	rvin_write(vin, vin->crop.top, VNSLPRC_REG);
+	rvin_write(vin, vin->crop.top + vin->crop.height - 1, VNELPRC_REG);
 
-	switch (vin->format.field) {
-	case V4L2_FIELD_INTERLACED:
-	case V4L2_FIELD_INTERLACED_TB:
-	case V4L2_FIELD_INTERLACED_BT:
-		rvin_write(vin, vin->crop.top / 2, VNSLPRC_REG);
-		rvin_write(vin, (vin->crop.top + vin->crop.height) / 2 - 1,
-			   VNELPRC_REG);
-		break;
-	default:
-		rvin_write(vin, vin->crop.top, VNSLPRC_REG);
-		rvin_write(vin, vin->crop.top + vin->crop.height - 1,
-			   VNELPRC_REG);
-		break;
-	}
 
 	/* TODO: Add support for the UDS scaler. */
 	if (vin->info->model != RCAR_GEN3)
@@ -636,6 +624,9 @@ static int rvin_setup(struct rvin_dev *vin)
 		vnmc = VNMC_IM_ODD_EVEN;
 		progressive = true;
 		break;
+	case V4L2_FIELD_ALTERNATE:
+		vnmc = VNMC_IM_ODD_EVEN;
+		break;
 	default:
 		vnmc = VNMC_IM_ODD;
 		break;
@@ -788,6 +779,18 @@ static bool rvin_capture_active(struct rvin_dev *vin)
 	return rvin_read(vin, VNMS_REG) & VNMS_CA;
 }
 
+static enum v4l2_field rvin_get_active_field(struct rvin_dev *vin, u32 vnms)
+{
+	if (vin->format.field == V4L2_FIELD_ALTERNATE) {
+		/* If FS is set it is an Even field. */
+		if (vnms & VNMS_FS)
+			return V4L2_FIELD_BOTTOM;
+		return V4L2_FIELD_TOP;
+	}
+
+	return vin->format.field;
+}
+
 static void rvin_set_slot_addr(struct rvin_dev *vin, int slot, dma_addr_t addr)
 {
 	const struct rvin_video_format *fmt;
@@ -937,7 +940,7 @@ static irqreturn_t rvin_irq(int irq, void *data)
 
 	/* Capture frame */
 	if (vin->queue_buf[slot]) {
-		vin->queue_buf[slot]->field = vin->format.field;
+		vin->queue_buf[slot]->field = rvin_get_active_field(vin, vnms);
 		vin->queue_buf[slot]->sequence = vin->sequence;
 		vin->queue_buf[slot]->vb2_buf.timestamp = ktime_get_ns();
 		vb2_buffer_done(&vin->queue_buf[slot]->vb2_buf,
@@ -1064,6 +1067,7 @@ static int rvin_mc_validate_format(struct rvin_dev *vin, struct v4l2_subdev *sd,
 		case V4L2_FIELD_TOP:
 		case V4L2_FIELD_BOTTOM:
 		case V4L2_FIELD_NONE:
+		case V4L2_FIELD_ALTERNATE:
 			break;
 		case V4L2_FIELD_INTERLACED_TB:
 		case V4L2_FIELD_INTERLACED_BT:
diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index d5e860ba6d9a2409..bc96ed563e365448 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -106,15 +106,7 @@ static void rvin_format_align(struct rvin_dev *vin, struct v4l2_pix_format *pix)
 	case V4L2_FIELD_INTERLACED_TB:
 	case V4L2_FIELD_INTERLACED_BT:
 	case V4L2_FIELD_INTERLACED:
-		break;
 	case V4L2_FIELD_ALTERNATE:
-		/*
-		 * Driver does not (yet) support outputting ALTERNATE to a
-		 * userspace. It does support outputting INTERLACED so use
-		 * the VIN hardware to combine the two fields.
-		 */
-		pix->field = V4L2_FIELD_INTERLACED;
-		pix->height *= 2;
 		break;
 	default:
 		pix->field = RVIN_DEFAULT_FIELD;
@@ -153,15 +145,25 @@ static int rvin_reset_format(struct rvin_dev *vin)
 
 	v4l2_fill_pix_format(&vin->format, &fmt.format);
 
-	rvin_format_align(vin, &vin->format);
-
 	vin->src_rect.top = 0;
 	vin->src_rect.left = 0;
 	vin->src_rect.width = vin->format.width;
 	vin->src_rect.height = vin->format.height;
 
+	/*  Make use of the hardware interlacer by default. */
+	if (vin->format.field == V4L2_FIELD_ALTERNATE) {
+		vin->format.field = V4L2_FIELD_INTERLACED;
+		vin->format.height *= 2;
+	}
+
+	rvin_format_align(vin, &vin->format);
+
 	vin->crop = vin->src_rect;
-	vin->compose = vin->src_rect;
+
+	vin->compose.top = 0;
+	vin->compose.left = 0;
+	vin->compose.width = vin->format.width;
+	vin->compose.height = vin->format.height;
 
 	return 0;
 }
@@ -205,13 +207,6 @@ static int rvin_try_format(struct rvin_dev *vin, u32 which,
 		crop->left = 0;
 		crop->width = pix->width;
 		crop->height = pix->height;
-
-		/*
-		 * If source is ALTERNATE the driver will use the VIN hardware
-		 * to INTERLACE it. The crop height then needs to be doubled.
-		 */
-		if (pix->field == V4L2_FIELD_ALTERNATE)
-			crop->height *= 2;
 	}
 
 	if (field != V4L2_FIELD_ANY)
-- 
2.21.0


  parent reply	other threads:[~2019-07-05  4:56 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-05  4:55 [PATCH 0/4] " Niklas Söderlund
2019-07-05  4:55 ` [PATCH 1/4] rcar-vin: Rename rectangle holding holding the video source information Niklas Söderlund
2019-07-05  9:11   ` Geert Uytterhoeven
2019-07-16 14:40   ` Kieran Bingham
2019-07-05  4:55 ` [PATCH 2/4] rcar-vin: Do not reset the crop and compose rectangles in s_fmt Niklas Söderlund
2019-07-05  8:36   ` Sergei Shtylyov
2019-07-16 14:51   ` Kieran Bingham
2019-07-05  4:55 ` Niklas Söderlund [this message]
2019-07-19 11:13   ` [PATCH 3/4] rcar-vin: Add support for V4L2_FIELD_ALTERNATE Kieran Bingham
2019-08-08  0:39     ` Niklas Söderlund
2019-07-05  4:55 ` [PATCH 4/4] rcar-vin: Clean up how format is set on subdevice Niklas Söderlund
2019-07-16 14:56   ` Kieran Bingham

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