[Patch 07/35] media: ti-vpe: Add support for SEQ_TB buffers

From: Benoit Parrot
Date: Wed Sep 28 2016 - 17:21:12 EST

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From: Nikhil Devshatwar <nikhil.nd@xxxxxx>

The video source can generate the data in the SEQ_TB buffer format.
In the case of TI SoC, the IVA_HD can generate the interlaced content in
the SEQ_TB buffer format. This is the format where the top and bottom field
data can be contained in a single buffer. For example, for NV12, interlaced
format, the data in Y buffer will be arranged as Y-top followed by
Y-bottom. And likewise for UV plane.

Also, queuing one buffer of SEQ_TB is equivalent to queuing two different
buffers for top and bottom fields. Driver needs to take care of this when
handling source buffer lists.

Signed-off-by: Nikhil Devshatwar <nikhil.nd@xxxxxx>
Signed-off-by: Benoit Parrot <bparrot@xxxxxx>
---
drivers/media/platform/ti-vpe/vpe.c | 125 +++++++++++++++++++++++++++++-------
1 file changed, 103 insertions(+), 22 deletions(-)

diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 9c38eff5df46..d6a2f07c592e 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -320,9 +320,13 @@ struct vpe_q_data {
};

/* vpe_q_data flag bits */
-#define Q_DATA_FRAME_1D (1 << 0)
-#define Q_DATA_MODE_TILED (1 << 1)
-#define Q_DATA_INTERLACED (1 << 2)
+#define Q_DATA_FRAME_1D BIT(0)
+#define Q_DATA_MODE_TILED BIT(1)
+#define Q_DATA_INTERLACED_ALTERNATE BIT(2)
+#define Q_DATA_INTERLACED_SEQ_TB BIT(3)
+
+#define Q_IS_INTERLACED (Q_DATA_INTERLACED_ALTERNATE | \
+ Q_DATA_INTERLACED_SEQ_TB)

enum {
Q_DATA_SRC = 0,
@@ -638,7 +642,7 @@ static void set_us_coefficients(struct vpe_ctx *ctx)

cp = &us_coeffs[0].anchor_fid0_c0;

- if (s_q_data->flags & Q_DATA_INTERLACED) /* interlaced */
+ if (s_q_data->flags & Q_IS_INTERLACED) /* interlaced */
cp += sizeof(us_coeffs[0]) / sizeof(*cp);

end_cp = cp + sizeof(us_coeffs[0]) / sizeof(*cp);
@@ -765,8 +769,7 @@ static void set_dei_regs(struct vpe_ctx *ctx)
* for both progressive and interlace content in interlace bypass mode.
* It has been recommended not to use progressive bypass mode.
*/
- if ((!ctx->deinterlacing && (s_q_data->flags & Q_DATA_INTERLACED)) ||
- !(s_q_data->flags & Q_DATA_INTERLACED)) {
+ if (!(s_q_data->flags & Q_IS_INTERLACED) || !ctx->deinterlacing) {
deinterlace = false;
val = VPE_DEI_INTERLACE_BYPASS;
}
@@ -834,8 +837,8 @@ static int set_srcdst_params(struct vpe_ctx *ctx)
ctx->sequence = 0;
ctx->field = V4L2_FIELD_TOP;

- if ((s_q_data->flags & Q_DATA_INTERLACED) &&
- !(d_q_data->flags & Q_DATA_INTERLACED)) {
+ if ((s_q_data->flags & Q_IS_INTERLACED) &&
+ !(d_q_data->flags & Q_IS_INTERLACED)) {
int bytes_per_line;
const struct vpdma_data_format *mv =
&vpdma_misc_fmts[VPDMA_DATA_FMT_MV];
@@ -1066,6 +1069,28 @@ static void add_in_dtd(struct vpe_ctx *ctx, int port)
port);
return;
}
+
+ 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;
+
+ 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;
+ }
+ }
}

if (q_data->flags & Q_DATA_FRAME_1D)
@@ -1114,9 +1139,22 @@ static void device_run(void *priv)
struct vpe_ctx *ctx = priv;
struct sc_data *sc = ctx->dev->sc;
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
+ */
+ ctx->src_vbs[0] = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+ WARN_ON(ctx->src_vbs[0] == NULL);
+ } else {
+ ctx->src_vbs[0] = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ WARN_ON(ctx->src_vbs[0] == NULL);
+ }

- ctx->src_vbs[0] = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
- WARN_ON(ctx->src_vbs[0] == NULL);
ctx->dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
WARN_ON(ctx->dst_vb == NULL);

@@ -1321,7 +1359,7 @@ static irqreturn_t vpe_irq(int irq_vpe, void *data)
d_vb->sequence = ctx->sequence;

d_q_data = &ctx->q_data[Q_DATA_DST];
- if (d_q_data->flags & Q_DATA_INTERLACED) {
+ if (d_q_data->flags & Q_IS_INTERLACED) {
d_vb->field = ctx->field;
if (ctx->field == V4L2_FIELD_BOTTOM) {
ctx->sequence++;
@@ -1335,12 +1373,28 @@ static irqreturn_t vpe_irq(int irq_vpe, void *data)
ctx->sequence++;
}

- if (ctx->deinterlacing)
- s_vb = ctx->src_vbs[2];
+ if (ctx->deinterlacing) {
+ /*
+ * Allow source buffer to be dequeued only if it won't be used
+ * in the next iteration. All vbs are initialized to first
+ * buffer and we are shifting buffers every iteration, for the
+ * first two iterations, no buffer will be dequeued.
+ * This ensures that driver will keep (n-2)th (n-1)th and (n)th
+ * field when deinterlacing is enabled
+ */
+ if (ctx->src_vbs[2] != ctx->src_vbs[1])
+ s_vb = ctx->src_vbs[2];
+ else
+ s_vb = NULL;
+ }

spin_lock_irqsave(&dev->lock, flags);
- v4l2_m2m_buf_done(s_vb, VB2_BUF_STATE_DONE);
+
+ if (s_vb)
+ v4l2_m2m_buf_done(s_vb, VB2_BUF_STATE_DONE);
+
v4l2_m2m_buf_done(d_vb, VB2_BUF_STATE_DONE);
+
spin_unlock_irqrestore(&dev->lock, flags);

if (ctx->deinterlacing) {
@@ -1456,7 +1510,7 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f,
struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
struct v4l2_plane_pix_format *plane_fmt;
unsigned int w_align;
- int i, depth, depth_bytes;
+ int i, depth, depth_bytes, height;

if (!fmt || !(fmt->types & type)) {
vpe_err(ctx->dev, "Fourcc format (0x%08x) invalid.\n",
@@ -1464,7 +1518,8 @@ 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)
+ if (pix->field != V4L2_FIELD_NONE && pix->field != V4L2_FIELD_ALTERNATE
+ && pix->field != V4L2_FIELD_SEQ_TB)
pix->field = V4L2_FIELD_NONE;

depth = fmt->vpdma_fmt[VPE_LUMA]->depth;
@@ -1498,6 +1553,15 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f,
pix->num_planes = fmt->coplanar ? 2 : 1;
pix->pixelformat = fmt->fourcc;

+ /*
+ * For the actual image parameters, we need to consider the field
+ * height of the image for SEQ_TB buffers.
+ */
+ if (pix->field == V4L2_FIELD_SEQ_TB)
+ height = pix->height / 2;
+ else
+ height = pix->height;
+
if (!pix->colorspace) {
if (fmt->fourcc == V4L2_PIX_FMT_RGB24 ||
fmt->fourcc == V4L2_PIX_FMT_BGR24 ||
@@ -1505,7 +1569,7 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f,
fmt->fourcc == V4L2_PIX_FMT_BGR32) {
pix->colorspace = V4L2_COLORSPACE_SRGB;
} else {
- if (pix->height > 1280) /* HD */
+ if (height > 1280) /* HD */
pix->colorspace = V4L2_COLORSPACE_REC709;
else /* SD */
pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
@@ -1582,9 +1646,15 @@ static int __vpe_s_fmt(struct vpe_ctx *ctx, struct v4l2_format *f)
q_data->c_rect.height = q_data->height;

if (q_data->field == V4L2_FIELD_ALTERNATE)
- q_data->flags |= Q_DATA_INTERLACED;
+ 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
- q_data->flags &= ~Q_DATA_INTERLACED;
+ 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)
+ q_data->c_rect.height /= 2;

vpe_dbg(ctx->dev, "Setting format for type %d, wxh: %dx%d, fmt: %d bpl_y %d",
f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
@@ -1620,6 +1690,7 @@ static int vpe_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
static int __vpe_try_selection(struct vpe_ctx *ctx, struct v4l2_selection *s)
{
struct vpe_q_data *q_data;
+ int height;

if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
(s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
@@ -1654,13 +1725,22 @@ static int __vpe_try_selection(struct vpe_ctx *ctx, struct v4l2_selection *s)
return -EINVAL;
}

+ /*
+ * For SEQ_TB 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)
+ height = q_data->height / 2;
+ else
+ height = q_data->height;
+
if (s->r.top < 0 || s->r.left < 0) {
vpe_err(ctx->dev, "negative values for top and left\n");
s->r.top = s->r.left = 0;
}

v4l_bound_align_image(&s->r.width, MIN_W, q_data->width, 1,
- &s->r.height, MIN_H, q_data->height, H_ALIGN, S_ALIGN);
+ &s->r.height, MIN_H, height, H_ALIGN, S_ALIGN);

/* adjust left/top if cropping rectangle is out of bounds */
if (s->r.left + s->r.width > q_data->width)
@@ -1856,11 +1936,12 @@ static int vpe_buf_prepare(struct vb2_buffer *vb)
num_planes = q_data->fmt->coplanar ? 2 : 1;

if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
- if (!(q_data->flags & Q_DATA_INTERLACED)) {
+ if (!(q_data->flags & Q_IS_INTERLACED)) {
vbuf->field = V4L2_FIELD_NONE;
} else {
if (vbuf->field != V4L2_FIELD_TOP &&
- vbuf->field != V4L2_FIELD_BOTTOM)
+ vbuf->field != V4L2_FIELD_BOTTOM &&
+ vbuf->field != V4L2_FIELD_SEQ_TB)
return -EINVAL;
}
}
--
2.9.0

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