With AVI infoframe various parameters of video stream such as
aspect ratio, quantization range, videocode etc will be indicated
from source to sink.Thus AVI information needs to be set/accessed
by the middle ware based on the video content.
Thus this parameter is now moved to the ip_data structure.
Signed-off-by: NMythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

A hardware bug in the OMAP4 HDMI PHY causes physical damage to the board
if the HDMI PHY is kept powered on when the cable is not connected.

This patch solves the problem by adding hot-plug-detection into the HDMI
IP driver. This is not a real HPD support in the sense that nobody else
than the IP driver gets to know about the HPD events, but is only meant
to fix the HW bug.

The strategy is simple: If the display device is turned off by the user,
the PHY power is set to OFF. When the display device is turned on by the
user, the PHY power is set either to LDOON or TXON, depending on whether
the HDMI cable is connected.

The reason to avoid PHY OFF when the display device is on, but the cable
is disconnected, is that when the PHY is turned OFF, the HDMI IP is not
"ticking" and thus the DISPC does not receive pixel clock from the HDMI
IP. This would, for example, prevent any VSYNCs from happening, and
would thus affect the users of omapdss. By using LDOON when the cable is
disconnected we'll avoid the HW bug, but keep the HDMI working as usual
from the user's point of view.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Due to changes in struct hdmi_config, the pixel clock has to be obtained
differently.

The pixel clock is needed to calculate the CTS value as defined in the
HDMI specification.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add the vsync polarity, hsync polarity, interlace to hdmi_video_timings.
Remove the now duplicate structure hdmi_timings.
update the static table structure in HDMI with CEA/VESA code and mode.
Signed-off-by: NMythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

video interface structure is a duplicate structure with parameters which are
already present in ip_data config structure, Thus removing the structure and
modifying corresponding code.
Signed-off-by: NMythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The function hdmi_audio_trigger is a callback used by ASoC to stop/start
HDMI audio. Also, it does not perform IP-specific configuration directly.
Hence, it should be placed in the general portion of the HDMI driver,
along with the other ASoC callbacks.

Also, make this function static.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

In order to separate clearly IP-specific code from general DSS code,
a function for OMAP4 audio enable is created. This function is
included in the HDMI IP ops to align with the current implementation
of the DSS HDMI driver. This function is to be used by the ASoC
HDMI audio codec.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

These functions require access to IP-secific data. However, it is not possible
to pass such data as a function argument as such functions have a specific
signature specified by ASoC. Instead, they will have access to the IP-specific
data by calling snd_soc_codec_get_drvdata. The codec driver data is set
at probe time.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add support to dump the HDMI wrapper, core, PLL and PHY registers
through debugfs.
Signed-off-by: NMythri P K <mythripk@ti.com>
[tomi.valkeinen@ti.com: updated the description]
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Remove usage of hdmi_reg struct to use u16 instead in the HDMI IP header
file. hdmi_reg struct is not really needed, and the same change was also
made for dispc earlier.
Signed-off-by: NMythri P K <mythripk@ti.com>
[tomi.valkeinen@ti.com: updated the description]
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Implement detect() by checking the hot plug detect status.

The implementation is not very good, as it always turns on the HDMI
output to get the detection working. HDMI driver needs improvements so
that we could enable only core parts of it.

Cc: Mythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Clean up reading of EDID by passing direct address to the block being
read, instead of start address of the whole EDID memory area. Rewrite
the loop which reads the EDID.

This also fixes the checksum calculation, which used to calculate the
checksum only for the first block.

Cc: Mythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Split the DDC initialization off from hdmi_core_ddc_edid() into a
separate function hdmi_core_ddc_init(). This cleans up the
implementation.

Cc: Mythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Implement read_edid() for HDMI by implementing necessary functions to
hdmi.c and to hdmi_omap4_panel.c.

Cc: Mythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

regn divider is currently programmed to the registers without change,
but when calculating clock frequencies it is used as regn+1.

To make this similar to how DSI handles the dividers this patch changes
the regn value to be used as such for calculations, but the value
programmed to registers is regn-1.

This simplifies the clock frequency calculations, makes it similar to
DSI, and also allows us to use regn value 0 as undefined.

Cc: Mythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Functions that are included in HDMI IP driver is renamed to have
IP specific names so that it will not conflict with similar functions
from other IP.
Signed-off-by: NMythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Move HDMI IP dependent audio functions from HDMI DSS file  to IP library.
Signed-off-by: NMythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Split the current HDMI driver to move the HDMI IP dependent ( PLL/PHY/Core
configuration code) to a new IP file (ti_hdmi_4xxx_ip.c.
This is to separate IP dependent OMAP agnostic code from OMAP specific DSS
dependent code.
Signed-off-by: NMythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>