Add a helper function to get driver private data from CEC
adapter. This helps the readability a little bit and allows
to change the 'priv' field name to something else without
needing to touch all drivers.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 0b0b97dcc7)
Change-Id: I2691d8328350e968b74a90d1622b8e857cefc112
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Add support for two new low-level events: PIN_HPD_LOW and PIN_HPD_HIGH.
This is specifically meant for use with the upcoming cec-gpio driver
and makes it possible to trace when the HPD pin changes. Some HDMI
sinks do strange things with the HPD and this makes it easy to debug
this.
Note that this also moves the initialization of a devnode mutex and
list to the allocate_adapter function: if the HPD is high, then as
soon as the HPD interrupt is created an interrupt occurs and
cec_queue_pin_hpd_event() is called which requires that the devnode
mutex and list are initialized.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 333ef6bd10)
Change-Id: I2fc5ca673ed67247d6f1a60906e515caa828a064
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
The current CEC pin value (0 or 1) was part of the cec_pin struct,
but that assumes that CEC pin monitoring can only be used with
a driver that uses the low-level CEC pin framework.
But hardware that has both a high-level API and can monitor the
CEC pin at low-level at the same time does not need to depend on
the cec pin framework.
To support such devices remove the cur_value field from struct cec_pin
and add a cec_pin_is_high field to cec_adapter. This also makes it
possible to drop the '#ifdef CONFIG_CEC_PIN' in cec-api.c.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 28e11b15b6)
Change-Id: I7f144faf81e6eb3dfdaa7cca5978214f67eaa84d
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
The CEC_EVENT_PIN_LOW/HIGH defines and the cec_queue_pin_event() function
did not specify that these were about CEC pin events.
Since in the future there will also be HPD pin events it is wise to rename
the event defines and function to CEC_EVENT_PIN_CEC_LOW/HIGH and
cec_queue_pin_cec_event() now before these become part of the ABI.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 9a6b2a8740)
Change-Id: I292a2aca552575958e0705727ab7ea277839b479
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Add support for CEC hardware that relies on low-level pin polling or
GPIO interrupts.
One example is the Allwinner SoC. But any GPIO-based CEC implementation can
use this as well.
A GPIO implementation is very suitable as well for debugging: it can use
interrupts to detect state changes and report it. Userspace can then verify
if the bus traffic is correct. This also makes error injection possible.
The disadvantage is that it is hard to get the timings right since linux
isn't a hard realtime system.
In general on an idle system it works quite well, but under load the timer
will miss its mark every so often.
The debugfs file /sys/kernel/debug/cec/cecX/status gives some statistics
with respect to the timer overruns.
When the adapter is unconfigured and the low-level driver supports
interrupts, then the interrupt will be used to detect changes. This should
be quite accurate. But when the adapter is configured a hrtimer has to be
used.
The hrtimer implements a state machine where for each state the code will
read the bus or drive the bus and go on to the next state. It will re-arm
the timer with a delay based on the next state.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit ea5c8ef296)
Change-Id: Iba76fc7d2a93bfe5fff1792afe82416ad4f02c8c
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Add support for the new MONITOR_PIN mode.
Add the cec_pin_event function that the CEC pin code will call to queue pin
change events.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit b8d62f50b1)
Change-Id: I52267565092f0f3539e2a0f98328a360839a1d2f
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Event handling was always fairly simplistic since there were only
two events. With the addition of pin events this needed to be redesigned.
The state_change and lost_msgs events are now core events with the
guarantee that the last state is always available. The new pin events
are a queue of events (up to 64 for each event) and the oldest event
will be dropped if the application cannot keep up. Lost events are
marked with a new event flag.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 6b2bbb0874)
Change-Id: I922f9ef9ae718ed93e02556cc007b2d943c5b11d
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Currently the transmit_(attempt_)done and received_msg functions set
the timestamp themselves. For the upcoming low-level pin API we need
to pass this as an argument instead. So make _ts variants that allow
the caller to specify the timestamp.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 0861ad14c6)
Change-Id: I98991dc09741fd6a5c3593e25d70f08897f663a6
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Kernel logging messes up the upcoming low-level CEC monitoring support
which is very time-sensitive. So change the debug level of this message
but keep a counter that is shown in the debugfs status log.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit bb789e03f2)
Change-Id: I4d40fc677c4f5d35db2176aad8846ae780bce53d
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Add a new capability CEC_CAP_NEEDS_HPD. If this capability is set
then the hardware can only use CEC if the HDMI Hotplug Detect pin
is high. Such hardware cannot handle the corner case in the CEC specification
where it is possible to transmit messages even if no hotplug signal is
present (needed for some displays that turn off the HPD when in standby,
but still have CEC enabled).
Typically hardware that needs this capability have the HPD wired to the CEC
block, often to a 'power' or 'active' pin.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit f902c1e95d)
Change-Id: I6bdbb202fb53ae2e8f14e3be15ec7613914f2bbb
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
A simpler variant of cec_transmit_done to be used where the HW does
just a single attempt at a transmit. So if the status indicates an
error, then the corresponding error count will always be 1 and this
function figures that out based on the status argument.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit c94cdc1e0c)
Change-Id: I707f73b15a3634c7a5883764caf6747422daa888
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
This function simplifies the integration of CEC in DRM drivers.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 23111ec304)
Change-Id: Ibad64be8af1b0548978bd91b467e82bc719afca3
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
This config option is strictly speaking independent of the
media subsystem since it can be used by drm as well.
Besides, it looks odd when drivers select CEC_CORE and
MEDIA_CEC_NOTIFIER, that's inconsistent naming.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit e94c32818d)
Change-Id: I6f89afe3b6f0bca110451ece5ef3ecb12c2922bb
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Drop the separate cec-edid.h header and merge it into cec.h.
There was really no need to have a separate header for this.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit ee7e987133)
Change-Id: Idf14df419f4663f24bcbb2de3603498651a469d4
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
The Kconfig options for the CEC subsystem were a bit messy. In
addition there were two cec sources (cec-edid.c and cec-notifier.c)
that were outside of the media/cec directory, which was weird.
Move those sources to media/cec as well.
The cec-edid and cec-notifier functionality is now part of the cec
module and these are no longer separate modules.
Also remove the MEDIA_CEC_EDID config option and include it with the
main CEC config option (which defined CEC_EDID anyway).
Added static inlines to cec-edid.h for dummy functions when CEC_CORE
isn't defined.
CEC drivers should now depend on CEC_CORE.
CEC drivers that need the cec-notifier functionality must explicitly
select CEC_NOTIFIER.
The s5p-cec and stih-cec drivers depended on VIDEO_DEV instead of
CEC_CORE, fix that as well.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 56a263aaa0)
Change-Id: I3c83c4d1aea534c2e8163422c73c8bc276f20f8f
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
The cec_allocate_adapter function doesn't need the parent device, only the
cec_register_adapter function needs it.
Drop the cec_devnode parent field, since devnode.dev.parent can be used
instead.
This change makes the framework consistent with other frameworks where the
parent device is not used until the device is registered.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit f51e80804f)
Change-Id: Ib9a26eedf0e07f5964482d8cbb2c4698031d7bd9
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
The last open issues have been addressed, so it is time to move
this out of staging and into the mainline and to move the public
cec headers to include/uapi/linux.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 0dbacebede)
Change-Id: I7bf14806f5043a2565328fa715cf44fe2b4ad713
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
This lock will be used to protect more than just the fhs list.
So rename it to just 'lock'.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 62148f0930)
Change-Id: Ib8f66aec21134ffe333afc3d7d926d1c0844798d
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
The size of the transmit queue was unlimited, which meant that
in non-blocking mode you could flood the CEC adapter with messages
to be transmitted.
Limit this to 18 messages.
Also print the number of pending transmits and the timeout value
in the status debugfs file.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit 11065f8531)
Change-Id: I1d143e076ed8a4708a3e6240faf41c6434367d11
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
The added HDMI CEC framework provides a generic kernel interface for
HDMI CEC devices.
Note that the CEC framework is added to staging/media and that the
cec.h and cec-funcs.h headers are not exported yet. While the kABI
is mature, I would prefer to allow the uABI some more time before
it is mainlined in case it needs more tweaks.
This adds the cec-core.c, media/cec.h and cec-priv.h sources.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
[k.debski@samsung.com: Merged CEC Updates commit by Hans Verkuil]
[k.debski@samsung.com: Merged Update author commit by Hans Verkuil]
[k.debski@samsung.com: code cleanup and fixes]
[k.debski@samsung.com: add missing CEC commands to match spec]
[k.debski@samsung.com: add RC framework support]
[k.debski@samsung.com: move and edit documentation]
[k.debski@samsung.com: add vendor id reporting]
[k.debski@samsung.com: reorder of API structs and add reserved fields]
[k.debski@samsung.com: fix handling of events and fix 32/64bit timespec problem]
[k.debski@samsung.com: add sequence number handling]
[k.debski@samsung.com: add passthrough mode]
[k.debski@samsung.com: fix CEC defines, add missing CEC 2.0 commands]
Signed-off-by: Kamil Debski <kamil@wypas.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit a56960e8b4)
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
Change-Id: I3063b08b8b818501a683f701d014533bc533d163
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
