On 09/06/2013 12:12 PM, Archit Taneja wrote: > Add support for the de-interlacer block in VPE. > > For de-interlacer to work, we need to enable 2 more sets of VPE input ports > which fetch data from the 'last' and 'last to last' fields of the interlaced > video. Apart from that, we need to enable the Motion vector output and input > ports, and also allocate DMA buffers for them. > > We need to make sure that two most recent fields in the source queue are > available and in the 'READY' state. Once a mem2mem context gets access to the > VPE HW(in device_run), it extracts the addresses of the 3 buffers, and provides > it to the data descriptors for the 3 sets of input ports((LUMA1, CHROMA1), > (LUMA2, CHROMA2), and (LUMA3, CHROMA3)) respectively for the 3 consecutive > fields. The motion vector and output port descriptors are configured and the > list is submitted to VPDMA. > > Once the transaction is done, the v4l2 buffer corresponding to the oldest > field(the 3rd one) is changed to the state 'DONE', and the buffers corresponding > to 1st and 2nd fields become the 2nd and 3rd field for the next de-interlace > operation. This way, for each deinterlace operation, we have the 3 most recent > fields. After each transaction, we also swap the motion vector buffers, the new > input motion vector buffer contains the resultant motion information of all the > previous frames, and the new output motion vector buffer will be used to hold > the updated motion vector to capture the motion changes in the next field. The > motion vector buffers are allocated using the DMA allocation API. > > The de-interlacer is removed from bypass mode, it requires some extra default > configurations which are now added. The chrominance upsampler coefficients are > added for interlaced frames. Some VPDMA parameters like frame start event and > line mode are configured for the 2 extra sets of input ports. > > Signed-off-by: Archit Taneja <archit@xxxxxx> Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> Regards, Hans > --- > drivers/media/platform/ti-vpe/vpe.c | 392 ++++++++++++++++++++++++++++++++---- > 1 file changed, 358 insertions(+), 34 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
