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@xxxxxxxxxxxx>
---
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
