From: Mythri P K <[email protected]>
This patch is a outline of how the HDMI support is added to OMAP4.
HDMI is a driver that is similar to the VENC or the DSI driver to support
HDMI/DVI sink device.
The current Design adheres to the DSS2 Architecture.
It is split into the HDMI DSS driver and HDMI panel Driver.
HDMI DSS driver Located in drivers/video/omap2/dss/hdmi.c
is responsible for OMAP related configuration such as listening to the
DSS_HDMI irq which signals changes such as Hot-plug detect ,
Physical attach/detach.
This driver is responsible to calculate the PLL values based on the
TV resolution that is selected.
Yet another functionality is to call necessary configuration for the
Mux/GPIO settings.
HDMI Panel Driver is located in drivers/video/omap2/displays/hdmi_omap4_panel.c.
This is a panel driver which acts as the HDMI source and is responsible for
all the configuration of the HDMI, based on the parameters read from the EDID
of the sink device.
It registers hdmi driver to the omap_dss bus and calls the functionality
of the HDMI DSS driver.
This driver is responsible for configuration of the HDMI IP, which are:
1. Configuration of the PHY registers.
2. Configuration of the PLL registers and setting of the TMDS clock.
3. Configuration of the DDC to read the EDID data when available.
4. Configuration of the core reigsters to set:
a. set the video registers to the timing and format that
is selected.
b. set the audio reigsters based on the EDID value read and
user selected parameters.
c. Set the AVI info frame reigsters to configure the auxilary
info frame which are repeated.
It is also provides the interface for users
1.To read the EDID contents and also confiure the timings based on EDID.
2.To configure AVI Inforframe Based on the the EDID(sink capability).
Mythri P K (2):
OMAP:DSS:Patch to add support for HDMI as panel driver
OMAP:DSS:Patch to add HDMI DSS driver support
drivers/video/omap2/displays/hdmi_omap4_panel.c | 1443 +++++++++++++++++++++++
drivers/video/omap2/displays/hdmi_omap4_panel.h | 672 +++++++++++
drivers/video/omap2/dss/hdmi.c | 292 +++++
3 files changed, 2407 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/omap2/displays/hdmi_omap4_panel.c
create mode 100644 drivers/video/omap2/displays/hdmi_omap4_panel.h
create mode 100644 drivers/video/omap2/dss/hdmi.c
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