In the 1920x1080 register array an extra pair of reset ctrl disable
re-enable was causing unwanted init delays.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Add v4l2 controls to report the pixel rates of each mode. This is
needed by some CSI2 receiver in order to perform proper DPHY
configuration.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
The variable rval is being initialized with a value that
is never read and is being re-assigned a little later on. The
assignment is redundant and hence can be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
A hardcoded 12 MHz master clock frequency has been assumed since
conversion of the driver from soc_camera sensor to a standalone V4L2
subdevice by commit 23a52386fa ("media: ov6650: convert to standalone
v4l2 subdevice"). Fix it.
Define a static table of supported master clock rates (fix misnamed
symbol while being at it), then use v4l2_clk_get/set_rate() to obtain
a clock rate matching one of those supported. On success, apply
respective master clock hardware divisor provided by the matching
element of the table.
[Sakari Ailus: Initialize xclk to NULL.]
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This field of the driver private structure is no longer used, drop it.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
As calculation of pixel clock hardware divisor no longer depends on
mbus format specific maximum pixel clock, there is no need to reapply
the divisor on format change. Drop related code from ov6650_s_fmt()
helper.
Since a master clock hardware divisor, so far applied only together
with the pixel clock divisor in a single operation, will no longer be
applied from ov6650_s_fmt(), apply it, still using a hardcoded value
for now, from ov6650_prog_dflt() helper so hardware is still
initialised correctly on device probe.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
As appears from an analysis of to_clkrc() helper code after its
pclk_limit argument has been dropped, its result no longer depends on
another argument - pclk_max. Moreover, assuming that a constant value
of FRAME_RATE_MAX is always used as a denominator of the only
significant argument left - a struct v4l2_fract, the result in fact
depends only on the numerator value of that argument. As a further
consequence, it no longer makes sense to recalculate frame intervals by
converting them forth and back with a GET_CLKRC_DIV(to_clkrc(tpf))
construct.
Drop use of GET_CLKRC_DIV() on results of to_clkrc() where possible -
use the frame interval value directly. Furthermore, replace the
to_clkrc() helper function with a simple macro and update its users to
always use FRAME_RATE_MAX as frame interval denominator and pass only
its numerator as an argument.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
That attribute used to be obtained from platform data by a soc_camera
host interface and passed to the sensor driver for .s_mbus_fmt() video
operation callback, later reused as .set_fmt() pad operation callback,
to be able to limit frame rate. The driver stored that value in its
private structure for further use from .g/s_parm(), later converted to
g/s_frame_interval().
On conversion of the driver from soc_camera sensor to a standalone V4L2
subdevice by commit 23a52386fa ("media: ov6650: convert to standalone
v4l2 subdevice"), that attribute had been replaced by a constant and
hardcoded to an arbitrarily chosen pixel clock limit. Drop it. Host
interfaces can limit frame rate if needed by calling
.s_frame_interval().
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
The driver stores a frame interval value supposed to be in line with
hardware state in a device private structure. Since the driver initial
submission, the respective field of the structure has never been
initialised on device probe. Moreover, if updated from
.s_frame_interval(), a new value is stored before it is applied on
hardware. If an error occurs during device update, the stored value
may no longer reflect hardware state and consecutive calls to
.g_frame_interval() may return incorrect information.
Assuming a failed update of the device means its actual state hasn't
changed, update the frame interval field of the device private
structure with a new value only after it is successfully applied on
hardware so it always reflects actual hardware state to the extent
possible. Also, initialise the field with hardware default frame
interval on device probe.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT.
Both PREEMPT and PREEMPT_RT require the same functionality which today
depends on CONFIG_PREEMPT.
Switch the Kconfig dependency to CONFIG_PREEMPTION.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
The request API documentation introduced a new section which should have
been a subsection. Fix this.
Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Pass the v4l2-ctl configuration for the imx6q-sabreauto PAL
example for completeness and consistency.
Suggested-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
The i.MX6DL sabreauto has different numbering on the I2C bus and
I2C muxes compared to the i.MX6Q as shown in the kernel log below:
[ 5.159423] imx-media: ipu1_csi0_mux:5 -> ipu1_csi0:0
[ 5.164618] imx-media: ipu1_csi1_mux:5 -> ipu1_csi1:0
[ 5.169953] imx-media: adv7180 4-0021:0 -> ipu1_csi0_mux:4
To avoid confusion, add an entry that shows how to setup the links and
configure the pads that are specific to the i.MX6DL sabreauto.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
In the i.MX6Q sabreauto pipeline example, it is better to provide
a real example for the output format, so do it just like in the
previous lines for consistency.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Improve the documentation by specifying that the instructions
are related to the i.MX6Q sabreauto variant.
This avoids confusion if someone follows these steps on a i.MX6DL
sabreauto, which has different numbering on the I2C bus and
I2C muxes.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Don't populate the array 'cri' on the stack but instead make it
static and const. Makes the object code smaller by 165 bytes.
Turn the 2nd parameter of 'log_infoframe()' const accordingly.
Before:
text data bss dec hex filename
98533 20024 256 118813 1d01d drivers/media/i2c/adv7842.o
After:
text data bss dec hex filename
98304 20088 256 118648 1cf78 drivers/media/i2c/adv7842.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
The variable ret is being initialized with a value that
is never read and is being re-assigned a little later on. The
assignment is redundant and hence can be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
There appears to be a copy-paste error on the access of
csc_coeffs.y2r.r601.full.coeff, I believe csc_coeffs.2yr.r601.full.coeff
should be used instead. This is a moot point as the code is never
reached, but at least use the correct structure element.
Addresses-Coverity: ("Copy-paste error")
Fixes: 3ff3a712a9 ("media: ti-vpe: vpe: don't rely on colorspace member for conversion")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Currently the "chip found" message is shown even in the case where the
I2C address is wrongly passed in the device tree, or also in the case of
probe failure, which is misleading.
To avoid such problem, move this message after real I2C transactions
have been successfully made and we are certain that the adv7180 is
really present and probed.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
In af9005_identify_state when returning -EIO the allocated buffer should
be released. Replace the "return -EIO" with assignment into ret and move
deb_info() under a check.
Fixes: af4e067e1d ("V4L/DVB (5625): Add support for the AF9005 demodulator from Afatech")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Drivers that use the CEC pin framework have no way of processing messages
themselves by providing the 'received' callback. This is present in
cec_ops, but not in cec_pin_ops.
Add support for this callback.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Sometimes it detects a weird resolution such as 1024x287 when the
actual resolution is 1024x768. To resolve such an issue, this
commit adds clearing for hsync and vsync polarity register bits
at the beginning of the first mode detection. This is recommended
in the datasheet.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
To prevent inaccurate detections of resolution, this commit enables
clearing of hsync/vsync polarity bits based on probed sync state.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This introduces support for HEVC/H.265 to the Cedrus VPU driver, with
both uni-directional and bi-directional prediction modes supported.
Field-coded (interlaced) pictures, custom quantization matrices and
10-bit output are not supported at this point.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Document the current state of the HEVC slice pixel format.
The format will need to evolve in the future, which is why it is
not part of the public API.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This introduces the required definitions for HEVC decoding support with
stateless VPUs. The controls associated to the HEVC slice format provide
the required meta-data for decoding slices extracted from the bitstream.
They are not exported to the public V4L2 API since reworking this API
will likely be needed for covering various use-cases and new hardware.
Multi-slice decoding is exposed as a valid decoding mode to match current
H.264 support but it is not yet implemented.
The interface comes with the following limitations:
* No custom quantization matrices (scaling lists);
* Support for a single temporal layer only;
* No slice entry point offsets support;
* No conformance window support;
* No VUI parameters support;
* No support for SPS extensions: range, multilayer, 3d, scc, 4 bits;
* No support for PPS extensions: range, multilayer, 3d, scc, 4 bits.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
[hverkuil-cisco@xs4all.nl: use 1ULL in flags defines in hevc-ctrls.h]
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
DIV_ROUND_UP's first argument doesn't need to be wrapped in parenthesis
since that is already being taken care of in the macro's definition.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
We need to shift and mask values at different occasions to fill up
cedrus registers. This was done using macros that don't explicitly
treat arguments as unsigned, leading to possibly undefined behavior.
Introduce the SHIFT_AND_MASK_BITS macro and use it where possible.
In cases where it doesn't apply as-is, explicitly cast to unsigned
instead.
This macro should be moved to include/linux/bits.h eventually.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Support metadata output in vivid driver.
Metadata output is used to set brightness, contrast, saturation
and hue.
Adds new files for metadata output.
Signed-off-by: Vandana BN <bnvandana@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Add new metadata format to support metadata output in vivid.
Signed-off-by: Vandana BN <bnvandana@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Adds new file for describing new metadata format V4L2_META_FMT_VIVID added in vivid driver.
Signed-off-by: Vandana BN <bnvandana@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This patch adds meatadata capture support in vivid driver.
Adds new files for metadata capture.
Adds vivid controls to generate PTS and SCR for metadata stream.
also fixes v4l2-compliance issues seen on metadata device.
Signed-off-by: Vandana BN <bnvandana@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Touch devices have obviously no tuner, so don't attempt to enable those
ioctls for such devices.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Touch devices mark too many ioctls as valid. Restrict the list of
valid ioctls for touch devices.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
In determine_valid_ioctls() we can use SET_VALID_IOCTL to enable
ioctls for SDR, simplifying the code.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
If the type is VFL_TYPE_GRABBER, then also check device_caps
to see if the video device supports video and/or metadata and
disable unneeded ioctls.
Without this change, format ioctls for both video and metadata devices
could be called on both device nodes. This is true for other ioctls as
well, even if the device supports only video or metadata.
Metadata devices act similar to VBI devices w.r.t. which ioctls should
be enabled. This makes sense since VBI *is* metadata.
Signed-off-by: Vandana BN <bnvandana@gmail.com>
Co-developed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Documents the protocol that user-space should follow when
communicating with stateless video decoders.
The stateless video decoding API makes use of the new request and tags
APIs. While it has been implemented with the Cedrus driver so far, it
should probably still be considered staging for a short while.
Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
With recent changes, support for decoding multi-slice frames can be
easily added now.
Signal VPU if current slice is first in frame or not and add information
about first macroblock coordinates.
When frame contains multiple slices and driver works in slice mode, it's
more efficient to hold capture buffer in queue until all slices of a
same frame are decoded.
Add support for that to Cedrus driver by exposing and implementing
V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF capability.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
[hverkuil-cisco@xs4all.nl: rewritten to use v4l2_m2m_buf_done_and_job_finish]
[hverkuil-cisco@xs4all.nl: removed unnecessary (u32) cast]
[hverkuil-cisco@xs4all.nl: use new_frame v4l2_m2m_ctx bool]
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Drivers that support VB2_V4L2_FL_SUPPORTS_M2M_HOLD_CAPTURE_BUF
typically want to know if a new frame is started (i.e. the first
slice is about to be processed). Add a new_frame bool to v4l2_m2m_ctx
and set it accordingly.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
These helpers are used by stateless codecs when they support multiple
slices per frame and hold capture buffer flag is set. It's expected that
all such codecs will use this code.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Co-developed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Add this new V4L2_DEC_CMD_FLUSH decoder command and document it.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Check for held buffers that are ready to be returned to vb2 in
__v4l2_m2m_try_queue(). This avoids drivers having to handle this
case.
Add v4l2_m2m_buf_done_and_job_finish() to correctly return source
and destination buffers and mark the job as finished while taking
a held destination buffer into account (i.e. that buffer won't be
returned). This has to be done while job_spinlock is held to avoid
race conditions.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This patch adds support for the V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF
flag.
It also adds a new V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF
capability.
Drivers should set vb2_queue->subsystem_flags to
VB2_V4L2_FL_SUPPORTS_M2M_HOLD_CAPTURE_BUF to indicate support
for this flag.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
It is likely that it should be UVC_METADATA_BUF_SIZE instead.
Fix it and use it.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
When parsing the UVC control descriptors fails, the error path tries to
cleanup a media device that hasn't been initialised, potentially
resulting in a crash. Fix this by initialising the media device before
the error handling path can be reached.
Fixes: 5a254d751e ("[media] uvcvideo: Register a v4l2_device")
Reported-by: syzbot+c86454eb3af9e8a4da20@syzkaller.appspotmail.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
I2C ops are expensive, as the I2C bus typical speed is 100kbps.
Also, stats reading take some time, as it requires to retrieve a
certain number of packets to complete.
While we don't know the minimal for CXD2841er, trying to do it
too quickly is still a very bad idea.
So, add some sanity logic there, preventing to retrieve stats
faster than one second.
This shouldn't cause any issues with well behavior apps, as they
usually take stats on a polling rate slower than 1 second.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
While 99% of the implementation of the bitrate estimation
routine for ISDB-T is generic, the current approach mangles it
with some mb86a20s-specific thing.
Split the calculus from the specific stuff, in order to make
easier to use the same approach on other drivers requiring
a similar formula.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
