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With addition of output entities, a device connects to an output, and an output
connects to overlay manager. Replace the dssdev->manager references with
dssdev->output->manager to access the manager correctly.
When enabling the HDMI output, check whether the output entity connected to
display is not NULL.
Signed-off-by: Archit Taneja <archit@ti.com>
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Add output structs to output driver's private data. Register output instances by
having an init function in the probes of the platform device drivers for
different outputs. The *_init_output for each output registers the output and
fill up the output's plaform device, type and id fields. The *_uninit_output
functions unregister the output.
In the probe of each interface driver, the output entities are initialized
before the *_probe_pdata() functions intentionally. This is done to ensure that
the output entity is prepared before the panels connected to the output are
registered. We need the output entities to be ready because OMAPDSS will try
to make connections between overlays, managers, outputs and devices during the
panel's probe.
Signed-off-by: Archit Taneja <archit@ti.com>
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We currently create omap_dss_devices statically in board files, and use
those devices directly in the omapdss driver. This model prevents us
from having the platform data (which the dssdevs in board files
practically are) as read-only, and it's also different than what we will
use with device tree.
This patch changes the model to be in line with DT model: we allocate
the dssdevs dynamically, and initialize them according to the data in
the board file's dssdev (basically we memcopy the dssdev fields).
The allocation and registration is done in the following steps in the
output drivers:
- Use dss_alloc_and_init_device to allocate and initialize the device.
The function uses kalloc and device_initialize to accomplish this.
- Call dss_copy_device_pdata to copy the data from the board file's
dssdev
- Use dss_add_device to register the device.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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HDMI and VENC outputs always use the DIGIT output from DISPC. The dssdev
struct contains "channel" field which is used to specify the DISPC
output for the display, but this was not used for HDMI and VENC.
This patch fills the channel field explicitely for HDMI and VENC
displays so that we can always rely on the channel field.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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We have boards with multiple panel devices connected to the same
physical output, of which only one panel can be enabled at one time.
Examples of these are Overo, where you can use different daughter boards
that have different LCDs, and 3430SDP which has an LCD and a DVI output
and a physical switch to select the active display.
These are supported by omapdss so that we add all the possible display
devices at probe, but the displays are inactive until somebody enables
one. At this point the panel driver starts using the DSS, thus reserving
the physcal resource and excluding the other panels.
This is problematic:
- Panel drivers can't allocate their resources properly at probe(),
because the resources can be shared with other panels. Thus they can
be only reserved at enable time.
- Managing this in omapdss is confusing. It's not natural to have
child devices, which may not even exist (for example, a daughterboard
that is not connected).
Only some boards have multiple displays per output, and of those, only
very few have possibility of switching the display during runtime.
Because of the above points:
- We don't want to make omapdss and all the panel drivers more complex
just because some boards have complex setups.
- Only few boards support runtime switching, and afaik even then it's
not required. So we don't need to support runtime switching.
Thus we'll change to a model where we will have only one display device
per output and this cannot be (currently) changed at runtime. We'll
still have the possibility to select the display from multiple options
during boot with the default display option.
This patch accomplishes the above by changing how the output drivers
register the display device. Instead of registering all the devices
given from the board file, we'll only register one. If the default
display option is set, the output driver selects that display from its
displays. If the default display is not set, or the default display is
not one of the output's displays, the output driver selects the first
display.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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We used to have all the displays of the board in one list, and we made a
"displayX" directory in the sysfs, where X was the index of the display
in the list.
This doesn't work anymore with device tree, as there's no single list to
get the number from, and it doesn't work very well even with non-DT as
we need to do some tricks to get the index nowadays.
This patch changes omap_dss_register_device() so that it doesn't take
disp_num as a parameter anymore, but uses a private increasing counter
for the display number.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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set_timings function of DSS's output drivers are not consistent. Some of
them disable the output, set the timings, and re-enable the output. Some
set the timings on the fly, while the output is enabled. And some just
store the given timings, so that they will be taken into use next time
the output is enabled.
We require the DISPC output to be disabled when changing the timings,
and so we can change all the output drivers' set_timings to just store
the given timings.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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The HDMI driver requires vdda_hdmi_dac power for operation, but does not
enable it. This has worked because the regulator has been always
enabled.
But this may not always be the case, as I encountered when implementing
HDMI device tree support.
This patch changes the HDMI driver to use the vdda_hdmi_dac.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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TPD12S015A spec says to wait 300us after setting CT_CP_HPD gpio for the
5V power output to reach 90% of the voltage. This patch adds the delay
to the driver.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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We currently manage HDMI GPIOs in the board files via
platform_enable/disable calls. This won't work with device tree, and in
any case the correct place to manage the GPIOs is in the HDMI driver.
This patch moves the handling of the GPIOs to the HDMI driver. The GPIO
handling is moved to the common hdmi.c file, and this probably needs to
be revisited when adding OMAP5 HDMI support to see if the GPIO handling
needs to be moved to IP specific files.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
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The hdmi interface driver exposes functions to the hdmi panel driver to
configure the interface timings maintained by the hdmi driver.
These timings(stored in hdmi.ip_data.cfg) should be protected by the hdmi lock
to ensure they are called sequentially, this is similar to how hdmi enable and
disable functions need locking.
Signed-off-by: Archit Taneja <archit@ti.com>
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timings
The hdmi driver currently updates only the 'code' member of hdmi_config when
the op omapdss_hdmi_display_set_timing() is called by the hdmi panel driver.
The 'timing' field of hdmi_config is updated only when hdmi_power_on is called.
It makes more sense to configure the whole hdmi_config field in the set_timing
op called by the panel driver. This way, we don't need to call both functions
to ensure that our hdmi_config is configured correctly. Also, we don't need to
calculate hdmi_config during hdmi_power_on, or rely on the omap_video_timings
in the panel's omap_dss_device struct.
The default timings of the hdmi panel are represented in a cleaner form. Since
the hdmi output is now configured by it's own copy of timings (in
hdmi.ip_data.cfg), the panel driver needs to set it to a valid value before
enabling hdmi output. We now call omapdss_hdmi_set_timing() before enabling
hdmi output, this is done to atleast have the hdmi output configured to the
panel's default timings if the DSS user didn't call panel driver's set_timings()
op explicitly.
Signed-off-by: Archit Taneja <archit@ti.com>
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Small patch to disable the PLL appropriately before runtime_put in case
an error occurs while enabling the PHY.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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The hdmi CEA and VESA timings were represented by the struct hdmi_video_timings,
omap_video_timings couldn't be used as it didn't contain the fields hsync/vsync
polarities and interlaced/progressive information.
Remove hdmi_video_timings, and use omap_video_timings instead.
Cc: Mythri P K <mythripk@ti.com>
Signed-off-by: Archit Taneja <archit@ti.com>
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State change of HDMI PHY could potentially take many millisecs, we can do
better by protecting things in hdmi_set_phy_pwr() with a mutex rather than
a spin_lock_irqsave.
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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If runtime PM is not enabled in the kernel config, pm_runtime_get_sync()
will always return 1 and pm_runtime_put_sync() will always return
-ENOSYS. pm_runtime_get_sync() returning 1 presents no problem to the
driver, but -ENOSYS from pm_runtime_put_sync() causes the driver to
print a warning.
One option would be to ignore errors returned by pm_runtime_put_sync()
totally, as they only say that the call was unable to put the hardware
into suspend mode.
However, I chose to ignore the returned -ENOSYS explicitly, and print a
warning for other errors, as I think we should get notified if the HW
failed to go to suspend properly.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Jassi Brar <jaswinder.singh@linaro.org>
Cc: Grazvydas Ignotas <notasas@gmail.com>
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In preparation of OMAP moving to Common Clk Framework(CCF) change
clk_enable() and clk_disable() calls to clk_prepare_enable() and
clk_disable_unprepare() in omapdss. This can be safely done, as omapdss
never enables or disables clocks in atomic context.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: <linux-fbdev@vger.kernel.org>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Mike Turquette <mturquette@linaro.org>
[tomi.valkeinen@ti.com: updated patch description]
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Implement the DSS device driver audio support interface in the HDMI
panel driver and generic driver. The implementation relies on the
IP-specific functions that are defined at DSS probe time.
A mixed locking strategy is used. The panel's mutex is used when
the state of the panel is queried as required by the audio functions.
The audio state is protected using a spinlock as users of DSS HDMI
audio functionality might start/stop audio while holding a spinlock.
The mutex and the spinlock are held and released as needed by each
individual function to protect the panel state and the audio state.
Although the panel's audio_start functions does not check whether
the panel is active, the audio _ENABLED state can be reached only
from audio_enable, which does check the state of the panel. Also,
if the panel is ever disabled, the audio state will transition
to _DISABLED. Transitions are always protected by the audio lock.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
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Add support for more sample rates when calculating N and CTS. This
covers all the audio sample rates that an HDMI source is allowed
to transmit according to the HDMI 1.4a specification.
Also, reorganize the logic for the calculation when using deep color.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
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The N and CTS parameters are relevant to all HDMI implementations and
not specific to a given IP. Hence, the calculation is relocated
into the generic HDMI driver.
Also, deep color is not queried but it is still considered in the
calculation of N. This is to be changed when deep color functionality is
implemented in the driver.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
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Remove the ASoC OMAP HDMI audio codec. The goal of removing the codec
is to, in subsequent patches, give way to the implementation of the HDMI
audio support using the DSS device driver audio interface. This
approach will expose the HDMI audio functionality to any interested entity.
In a separate patch, ASoC will use this new approach to expose HDMI audio
to ALSA.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
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To improve readability, split the video_enable HDMI IP operation
into two separate functions for enabling and disabling video.
The video_enable function is also modified to return an error value.
While there, update these operations for the OMAP4 IP accordingly.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
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To improve readability, split the audio_enable HDMI IP operation
into two separate functions for enabling and disabling audio.
The audio_enable function is also modified to return an error value.
While there, update these operations for the OMAP4 IP accordingly.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
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Move the platform-data based display device initialization into a
separate function, so that we may later add of-based initialization.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Now that each output driver creates their own display devices, the
output drivers can also initialize those devices.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Currently the higher level omapdss platform driver gets the list of
displays in its platform data, and uses that list to create the
omap_dss_device for each display.
With DT, the logical way to do the above is to list the displays under
each individual output, i.e. we'd have "dpi" node, under which we would
have the display that uses DPI. In other words, each output driver
handles the displays that use that particular output.
To make the current code ready for DT, this patch modifies the output
drivers so that each of them creates the display devices which use that
output. However, instead of changing the platform data to suit this
method, each output driver is passed the full list of displays, and the
drivers pick the displays that are meant for them. This allows us to
keep the old platform data, and thus we avoid the need to change the
board files.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Now that we are using platform_driver_probe() we can add __inits and
__exits all around.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Now that the core.c doesn't fail if output driver's init fails, we can
change the uses of platform_driver_register to platform_driver_probe.
This will allow us to use __init in the following patches.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Instead of having an ugly #ifdef mess in the core.c for creating debugfs
files, add a dss_debugfs_create_file() function that the dss drivers
can use to create the debugfs files.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Now that the omapdss_core device is the parent for all other dss
devices, we don't need to use the dss_runtime_get/put anymore. Instead,
enabling omapdss_core will happen automatically when a child device is
enabled.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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For unknown reasons we seem to have a return in each of the omapdss's
uninit functions, which is a void function.
Remove the returns.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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The omapdss pdata handling is a mess. This is more evident when trying
to use device tree for DSS, as we don't have platform data anymore in
that case. This patch cleans the pdata handling by:
- Remove struct omap_display_platform_data. It was used just as a
wrapper for struct omap_dss_board_info.
- Pass the platform data only to omapdss device. The drivers for omap
dss hwmods do not need the platform data. This should also work better
for DT, as we can create omapdss device programmatically in generic omap
boot code, and thus we can pass the pdata to it.
- Create dss functions for get_ctx_loss_count and dsi_enable/disable_pads
that the dss hwmod drivers can call.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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The DPI and HDMI interfaces use their 'set_timing' functions to take in a new
set of timings. If the panel is disabled, they do not disable and re-enable
the interface. Currently, the manager timings are applied in hdmi_power_on()
and dpi_set_mode() respectively, these are not called by set_timings if the
panel is disabled.
When checking overlay and manager data, the DSS driver uses the last applied
manager timings, and not the timings held by omap_dss_device struct. Hence,
there is a need to apply the new manager timings even if the panel is disabled.
Apply the manager timings if the panel is disabled. Eventually, there should be
one common place where the timings are applied independent of the state of the
panel.
Signed-off-by: Archit Taneja <archit@ti.com>
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Replace the function dispc_mgr_set_timings() with dss_mgr_set_timings() in the
interface drivers. The latter function ensures that the timing related DISPC
registers are configured according to the shadow register programming model.
Remove the call to dispc_mgr_go() in dpi_set_timings() as the manager's go bit
is set by dss_mgr_set_timings().
Signed-off-by: Archit Taneja <archit@ti.com>
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Currently, a LCD manager's timings is set by dispc_mgr_set_lcd_timings() and TV
manager's timings is set by dispc_set_digit_size(). Use a common function called
dispc_mgr_set_timings() which sets timings for both type of managers.
We finally want the interface drivers to use an overlay manager function to
configure it's timings, having a common DISPC function would make things
cleaner.
For LCD managers, dispc_mgr_set_timings() sets LCD size and blanking values, for
TV manager, it sets only the TV size since blanking values don't exist for TV.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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While calculating regm and regmf value add using M2 divider in
the equation.
Formula for calculating:
Output clock on digital core domain:
CLKOUT = (M / (N+1))*CLKINP*(1/M2)
Internal oscillator output clock on internal LDO domain:
CLKDCOLDO = (M / (N+1))*CLKINP
The current code when allows variable M2 values as input
ignores using M2 divider values in calculation of regm and regmf.
so fix it by using M2 in calculation although the default value for
M2 is 1.
Signed-off-by: Mythri P K <mythripk@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Merge v3.3-rc6 to get the latest DSS and OMAP arch fixes.
Conflicts:
arch/arm/mach-omap1/board-innovator.c
drivers/video/omap2/dss/apply.c
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For DSS clock domain to transition from idle to active state. It's necessary
to enable the optional clock DSS_FCLK before we enable the module using the
MODULEMODE bits in the clock domain's CM_DSS_DSS_CLKCTRL register.
This sequence was not followed correctly for the 'dss_hdmi' hwmod and it led
to DSS clock domain not getting out of idle when pm_runtime_get_sync() was
called for hdmi's platform device.
Since the clock domain failed to change it's state to active, the hwmod code
disables any clocks it had enabled before for this hwmod. This led to the clock
'dss_48mhz_clk' gettind disabled.
When hdmi's runtime_resume() op is called, the call to dss_runtime_get()
correctly enables the DSS clock domain this time. However, the clock
'dss_48mhz_clk' is needed for HDMI's PHY to function correctly. Since it was
disabled previously, the driver fails when it tries to enable HDMI's PHY.
Fix this for now by ensuring that dss_runtime_get() is called before we call
pm_runtime_get_sync() for hdmi's platform device. A correct fix for later would
be to modify the DSS related hwmod's mainclks, and also some changes in how
opt clocks are handled in the DSS driver.
This fixes the issue of HDMI not working when it's the default display. The
issue is not seen if any other display is already enabled as the first display
would have correctly enabled the DSS clockdomain.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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The MCLK mode defines a factor to divide the clock that is used to
generate the Audio Clock Regeneration packets, MCLK.
The divisor is not used when the CTS value is calculated by HW.
When the value is calculated by SW, it depends on the silicon
revision.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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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: Tomi Valkeinen <tomi.valkeinen@ti.com>
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omapdss doesn't work properly on system suspend. The problem seems to be
the fact that omapdss uses pm_runtime_put() functions when turning off
the hardware, and when system suspend is in process only sync versions
are allowed.
Using non-sync versions normally and sync versions when suspending would
need rather ugly hacks to convey the information of
suspending/not-suspending to different functions. Optimally the driver
wouldn't even need to care about this, and the PM layer would handle
syncing when suspend is in process.
This patch changes all omapdss's pm_runtime_put calls to
pm_runtime_put_sync. This fixes the suspend problem, and probably the
performance penalty of always using sync versions is negligible.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
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code and mode parameters are already a part of the ip_data structure
so no need to keep the same parameters again in hdmi global structure.
Signed-off-by: Mythri P K <mythripk@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Change the timing match logic, Instead of the statically mapped method
to get the corresponding timings for a given code and mode, move to a
simpler array indexed method. It will help to scale up to add more
timings when needed.
Signed-off-by: Mythri P K <mythripk@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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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: Mythri P K <mythripk@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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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: Ricardo Neri <ricardo.neri@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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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: Ricardo Neri <ricardo.neri@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Under the new DSS architecture for HDMI, there is a clear separation
between general DSS code and HDMI IP-specific data. Functions
that require access to the HDMI driver IP-specific data receive an
hdmi_ip_data structure. The ASoC codec require access to such
IP-specific data. Then, instead of accessing it directly, it will be
passed as codec driver data. This also helps to have a clear separation
between DSS and ASoC portions of the code.
Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Now that dss_mgr_enable returns an error value, check it in all the
places dss_mgr_enable is used, and bail out properly.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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omap_overlay_manager struct contains enable() and disable() functions.
However, these are only meant to be used from inside omapdss, and thus
it's bad to expose the functions.
This patch adds dss_mgr_enable() and dss_mgr_disable() functions to
apply.c, which handle enabling and disabling the output.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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