Zynq Ult VCU TRD User Guide
65
UG1250 (v2019.1) May 29, 2019
Chapter 5:
Hardware Platform
HDMI TX Display Pipeline
The HDMI TX display pipeline is shown in
.
This pipeline consists of three main components, each of them controlled by the APU via an
AXI4-Lite base register interface:
• The Video Mixer IP core is configured to support blending of up to two video layers
and one graphics layer into one single output video stream. The three layers are
configured to be memory-mapped AXI4 interfaces connected to the HP0 high
performance PS/PL interface via an AXI interconnect; the main AXI4-Stream layer is
unused. The two video layers are configured for 16-bit YUYV, the graphics layer is
configured for 32-bit ARGB, (see
for details). A built-in color space
converter and chroma resampler convert the input formats to a 24-bit RGB output
format. Pixel-alpha blending is used to blend the graphics layer with the underlying
video layers. The AXI4-Stream output interface is a 48-bit bus that transports 2 ppc for
up to 2160p60 performance. It is connected to the HDMI TX Subsystem input interface.
A GPIO is used to reset the subsystem between resolution changes. For more
information refer to the
Video Mixer LogiCORE IP Product Guide
(PG243)
.
• The HDMI Transmitter Subsystem (HDMI TX) interfaces with PHY layers and provides
HDMI encoding functionality. The subsystem is a hierarchical IP that bundles a
collection of HDMI TX-related IP sub-cores and outputs them as a single IP. The
subsystem generates an HDMI stream from the incoming AXI4-Stream video data and
sends the generated TMDS data to the video PHY layer. For more information refer to
the
HDMI 1.4/2.0 Transmitter Subsystem Product Guide
(PG235)
.
• The Video PHY Controller is shared between the HDMI RX and HDMI TX pipelines. Refer
to
for more information on the VPHY and its configuration.
X-Ref Target - Figure 5-8
Figure 5-8:
HDMI TX Display Pipeline
32
128
32
Video
Mixer
Tx Data
AXI-S
AXI-MM
HP1
HPM0/1
AXI-Lite
PL
PS
HP0
HDMI Tx
SS
40
Video
PHY
HDMI Tx Display Pipeline
48
40
40
32
32
32
X20152-042519
