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[media] media: ti-vpe: Use line average de-interlacing for first 2 frames 

The motion detection block requires 3 fields to create the motion vector
data. This means that using the default method the first progressive
frame is only generated after 3rd field is consumed.
Hence by default for N input field we would generate N - 2 progressive
frames.

In order to generate N progressive frames from N fields we use the
line averaging mode of the de-interlacer for the first 2 fields and then
revert back to the preferred Edge Directed Interpolation method (using
the motion vector).
Thus creating 2 line averaged frames + N - 2 motion based frames for a
total of N frames.

Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Archit Taneja 2016-11-18 21:20:15 -02:00 committed by Mauro Carvalho Chehab
parent 4f36178188
commit 15f632e665
1 changed files with 31 additions and 2 deletions
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33
drivers/media/platform/ti-vpe/vpe.c
View File

@ -141,7 +141,7 @@ struct vpe_dei_regs {
*/
static const struct vpe_dei_regs dei_regs = {
.mdt_spacial_freq_thr_reg = 0x020C0804u,
.edi_config_reg = 0x0118100Fu,
.edi_config_reg = 0x0118100Cu,
.edi_lut_reg0 = 0x08040200u,
.edi_lut_reg1 = 0x1010100Cu,
.edi_lut_reg2 = 0x10101010u,
@ -798,6 +798,23 @@ static void set_dei_shadow_registers(struct vpe_ctx *ctx)
ctx->load_mmrs = true;
}
static void config_edi_input_mode(struct vpe_ctx *ctx, int mode)
{
struct vpe_mmr_adb *mmr_adb = ctx->mmr_adb.addr;
u32 *edi_config_reg = &mmr_adb->dei_regs[3];
if (mode & 0x2)
write_field(edi_config_reg, 1, 1, 2); /* EDI_ENABLE_3D */
if (mode & 0x3)
write_field(edi_config_reg, 1, 1, 3); /* EDI_CHROMA_3D */
write_field(edi_config_reg, mode, VPE_EDI_INP_MODE_MASK,
VPE_EDI_INP_MODE_SHIFT);
ctx->load_mmrs = true;
}
/*
* Set the shadow registers whose values are modified when either the
* source or destination format is changed.
@ -1111,6 +1128,15 @@ static void device_run(void *priv)
ctx->dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
WARN_ON(ctx->dst_vb == NULL);
if (ctx->deinterlacing) {
/*
* we have output the first 2 frames through line average, we
* now switch to EDI de-interlacer
*/
if (ctx->sequence == 2)
config_edi_input_mode(ctx, 0x3); /* EDI (Y + UV) */
}
/* config descriptors */
if (ctx->dev->loaded_mmrs != ctx->mmr_adb.dma_addr || ctx->load_mmrs) {
vpdma_map_desc_buf(ctx->dev->vpdma, &ctx->mmr_adb);
@ -1864,7 +1890,10 @@ static void vpe_buf_queue(struct vb2_buffer *vb)
static int vpe_start_streaming(struct vb2_queue *q, unsigned int count)
{
/* currently we do nothing here */
struct vpe_ctx *ctx = vb2_get_drv_priv(q);
if (ctx->deinterlacing)
config_edi_input_mode(ctx, 0x0);
return 0;
}