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Subject[Patch 04/16] media: ti-vpe: Add support for SEQ_BT
Date
From: Nikhil Devshatwar <nikhil.nd@ti.com>

SEQ_BT indicates the buffer for bottom field needs to be processed
before the top field.

Simplify the field selection logic to support SEQ_BT as well.

Modify the interlace flags to include any of alternate, SEQ_TB, SEQ_BT.
Update other format error checking to consider SEQ_BT.
Replace SEQ_TB with SEQ_XX wherever applicable.

Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
Signed-off-by: Benoit Parrot <bparrot@ti.com>
---
drivers/media/platform/ti-vpe/vpe.c | 73 ++++++++++++++++++-----------
1 file changed, 46 insertions(+), 27 deletions(-)

diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 0e9cb0319a92..5d0ec5f7ca25 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -328,9 +328,14 @@ struct vpe_q_data {
#define Q_DATA_MODE_TILED BIT(1)
#define Q_DATA_INTERLACED_ALTERNATE BIT(2)
#define Q_DATA_INTERLACED_SEQ_TB BIT(3)
+#define Q_DATA_INTERLACED_SEQ_BT BIT(4)
+
+#define Q_IS_SEQ_XX (Q_DATA_INTERLACED_SEQ_TB | \
+ Q_DATA_INTERLACED_SEQ_BT)

#define Q_IS_INTERLACED (Q_DATA_INTERLACED_ALTERNATE | \
- Q_DATA_INTERLACED_SEQ_TB)
+ Q_DATA_INTERLACED_SEQ_TB | \
+ Q_DATA_INTERLACED_SEQ_BT)

enum {
Q_DATA_SRC = 0,
@@ -1105,24 +1110,31 @@ static void add_in_dtd(struct vpe_ctx *ctx, int port)
dma_addr += offset;
stride = q_data->bytesperline[VPE_LUMA];

- if (q_data->flags & Q_DATA_INTERLACED_SEQ_TB) {
- /*
- * Use top or bottom field from same vb alternately
- * f,f-1,f-2 = TBT when seq is even
- * f,f-1,f-2 = BTB when seq is odd
- */
- field = (p_data->vb_index + (ctx->sequence % 2)) % 2;
+ /*
+ * field used in VPDMA desc = 0 (top) / 1 (bottom)
+ * Use top or bottom field from same vb alternately
+ * For each de-interlacing operation, f,f-1,f-2 should be one
+ * of TBT or BTB
+ */
+ if (q_data->flags & Q_DATA_INTERLACED_SEQ_TB ||
+ q_data->flags & Q_DATA_INTERLACED_SEQ_BT) {
+ /* Select initial value based on format */
+ if (q_data->flags & Q_DATA_INTERLACED_SEQ_BT)
+ field = 1;
+ else
+ field = 0;
+
+ /* Toggle for each vb_index and each operation */
+ field = (field + p_data->vb_index + ctx->sequence) % 2;

if (field) {
- /*
- * bottom field of a SEQ_TB buffer
- * Skip the top field data by
- */
int height = q_data->height / 2;
int bpp = fmt->fourcc == V4L2_PIX_FMT_NV12 ?
1 : (vpdma_fmt->depth >> 3);
+
if (plane)
height /= 2;
+
dma_addr += q_data->width * height * bpp;
}
}
@@ -1177,12 +1189,14 @@ static void device_run(void *priv)
struct vpe_q_data *d_q_data = &ctx->q_data[Q_DATA_DST];
struct vpe_q_data *s_q_data = &ctx->q_data[Q_DATA_SRC];

- if (ctx->deinterlacing && s_q_data->flags & Q_DATA_INTERLACED_SEQ_TB &&
- ctx->sequence % 2 == 0) {
- /* When using SEQ_TB buffers, When using it first time,
- * No need to remove the buffer as the next field is present
- * in the same buffer. (so that job_ready won't fail)
- * It will be removed when using bottom field
+ if (ctx->deinterlacing && s_q_data->flags & Q_IS_SEQ_XX &&
+ ctx->sequence % 2 == 0) {
+ /* When using SEQ_XX type buffers, each buffer has two fields
+ * each buffer has two fields (top & bottom)
+ * Removing one buffer is actually getting two fields
+ * Alternate between two operations:-
+ * Even : consume one field but DO NOT REMOVE from queue
+ * Odd : consume other field and REMOVE from queue
*/
ctx->src_vbs[0] = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
WARN_ON(ctx->src_vbs[0] == NULL);
@@ -1573,8 +1587,10 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f,
return -EINVAL;
}

- if (pix->field != V4L2_FIELD_NONE && pix->field != V4L2_FIELD_ALTERNATE
- && pix->field != V4L2_FIELD_SEQ_TB)
+ if (pix->field != V4L2_FIELD_NONE &&
+ pix->field != V4L2_FIELD_ALTERNATE &&
+ pix->field != V4L2_FIELD_SEQ_TB &&
+ pix->field != V4L2_FIELD_SEQ_BT)
pix->field = V4L2_FIELD_NONE;

depth = fmt->vpdma_fmt[VPE_LUMA]->depth;
@@ -1626,9 +1642,9 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f,

/*
* For the actual image parameters, we need to consider the field
- * height of the image for SEQ_TB buffers.
+ * height of the image for SEQ_XX buffers.
*/
- if (pix->field == V4L2_FIELD_SEQ_TB)
+ if (pix->field == V4L2_FIELD_SEQ_TB || pix->field == V4L2_FIELD_SEQ_BT)
height = pix->height / 2;
else
height = pix->height;
@@ -1734,11 +1750,13 @@ static int __vpe_s_fmt(struct vpe_ctx *ctx, struct v4l2_format *f)
q_data->flags |= Q_DATA_INTERLACED_ALTERNATE;
else if (q_data->field == V4L2_FIELD_SEQ_TB)
q_data->flags |= Q_DATA_INTERLACED_SEQ_TB;
+ else if (q_data->field == V4L2_FIELD_SEQ_BT)
+ q_data->flags |= Q_DATA_INTERLACED_SEQ_BT;
else
q_data->flags &= ~Q_IS_INTERLACED;

- /* the crop height is halved for the case of SEQ_TB buffers */
- if (q_data->flags & Q_DATA_INTERLACED_SEQ_TB)
+ /* the crop height is halved for the case of SEQ_XX buffers */
+ if (q_data->flags & Q_IS_SEQ_XX)
q_data->c_rect.height /= 2;

vpe_dbg(ctx->dev, "Setting format for type %d, wxh: %dx%d, fmt: %d bpl_y %d",
@@ -1811,10 +1829,10 @@ static int __vpe_try_selection(struct vpe_ctx *ctx, struct v4l2_selection *s)
}

/*
- * For SEQ_TB buffers, crop height should be less than the height of
+ * For SEQ_XX buffers, crop height should be less than the height of
* the field height, not the buffer height
*/
- if (q_data->flags & Q_DATA_INTERLACED_SEQ_TB)
+ if (q_data->flags & Q_IS_SEQ_XX)
height = q_data->height / 2;
else
height = q_data->height;
@@ -2031,7 +2049,8 @@ static int vpe_buf_prepare(struct vb2_buffer *vb)
} else {
if (vbuf->field != V4L2_FIELD_TOP &&
vbuf->field != V4L2_FIELD_BOTTOM &&
- vbuf->field != V4L2_FIELD_SEQ_TB)
+ vbuf->field != V4L2_FIELD_SEQ_TB &&
+ vbuf->field != V4L2_FIELD_SEQ_BT)
return -EINVAL;
}
}
--
2.17.1
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