Some applications don't check error codes from QBUF/DQBUF ioctls,
so don't spam kernel log with errors if they fall into endless loop
trying to queue next buffer after a failure.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
We do video allocation all the time and we need it to be fast. Plus TLB
efficiency isn't terribly important for video.
That means we want to set DMA_ATTR_ALLOC_SINGLE_PAGES.
See also the previous change (commit 14d3ae2efe "ARM: dma-mapping: Use
DMA_ATTR_ALLOC_SINGLE_PAGES hint to optimize allocation").
[m.szyprowski: rebased patch onto v4.9-rc1 and adapted changes
to latest videbuf2 changes, this simplifies code changes to
only set proper dma attribute flag and comment the reason
for it, added commit id of arch/arm/mm patch]
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
HSV formats were missing the color encoding, which leads to an invalid
ycbcr_enc value during get_fmt and try_fmt.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Zero is not a valid value for hsv_enc. Set the field to a valid
initial value.
This is not a problem for vivid, because it sets the field to 180 via
tpg_s_hsv_enc() on the control initialization, but it might be a source
of errors for other drivers that use this code.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.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>
A recent cleanup introduced a potential dereference of -EFAULT when we
call kfree(map->menu_info).
Fixes: 4cc5bed1ca ("[media] uvcvideo: Use memdup_user() rather than duplicating its implementation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
A recent cleanup had the right idea to remove the initialization
of the error variable, but missed the actual benefit of that,
which is that we get warnings if there is a bug in it. Now
we get a warning about a bug that was introduced by this cleanup:
drivers/media/platform/davinci/vpfe_capture.c: In function 'vpfe_probe':
drivers/media/platform/davinci/vpfe_capture.c:1992:9: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This adds the missing initialization that the warning is about,
and another one that was preexisting and that we did not get
a warning for. That second bug has existed since the driver
was first added.
Fixes: efb74461f5 ("[media] DaVinci-VPFE-Capture: Delete an unnecessary variable initialisation in vpfe_probe()")
Fixes: 7da8a6cb3e ("V4L/DVB (12248): v4l: vpfe capture bridge driver for DM355 and DM6446")
[mchehab@s-opensource.com: fix a merge conflict]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Usually, I don't like fixing coding style issues on non-staging
drivers, as it could be a mess pretty easy, and could become like
a snow ball. That's the case of recent changes on two changesets:
they disalign some statements. Yet, a care a lot with cx88 driver,
as it was the first driver I touched at the Kernel, and I've been
maintaining it since 2005. So, several of the coding style issues
were due to my code.
Per Andrey's suggestion, I ran checkpatch.pl in strict mode, with
fixed several other issues, did some function alinments, but broke
other alinments.
So, I had to manually apply another round of manual fixes to make
sure that everything is ok, and to make checkpatch happy with
this patch.
With this patch, checkpatch.pl is now happy when called with:
./scripts/checkpatch.pl -f --max-line-length=998 --ignore PREFER_PR_LEVEL
Also, the 80-cols violations that made sense were fixed.
Checkpatch would be happier if we convert it to use dev_foo(),
but this is a more complex change.
NOTE: there are some places with msleep(1). As this driver was
written at the time that the default was to sleep at least 10ms
on such calls (e. g. CONFIG_HZ=100), I replaced those calls by
usleep_range(10000, 20000), with should be safe to avoid breakages.
Fixes: 65bc2fe86e ("[media] cx88: convert it to use pr_foo() macros")
Fixes: 7b61ba8ff8 ("[media] cx88: make checkpatch happier")
Suggested-by: Andrey Utkin <andrey_utkin@fastmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Reviewed-by: Andrey Utkin <andrey_utkin@fastmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Commit 4710b752e0 ("[media] v4l: Add Renesas R-Car FDP1 Driver") in the
v4l-dvb tree adds CONFIG_VIDEO_RENESAS_FDP1.
It calls into the FCP driver, but when there is no dependency, FCP might
be a module while FDP1 is built-in.
We have the same logic in VIDEO_RENESAS_VSP1, which also depends on
FCP not being a module when it is built-in itself.
drivers/media/platform/rcar_fdp1.o: In function `fdp1_pm_runtime_resume':
rcar_fdp1.c:(.text.fdp1_pm_runtime_resume+0x78): undefined reference to `rcar_fcp_enable'
drivers/media/platform/rcar_fdp1.o: In function `fdp1_pm_runtime_suspend':
rcar_fdp1.c:(.text.fdp1_pm_runtime_suspend+0x14): undefined reference to `rcar_fcp_disable'
drivers/media/platform/rcar_fdp1.o: In function `fdp1_probe':
rcar_fdp1.c:(.text.fdp1_probe+0x15c): undefined reference to `rcar_fcp_get'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The new driver produces a warning when CONFIG_PM is disabled:
platform/rcar_fdp1.c:2408:12: error: 'fdp1_pm_runtime_resume' defined but not used [-Werror=unused-function]
platform/rcar_fdp1.c:2399:12: error: 'fdp1_pm_runtime_suspend' defined but not used [-Werror=unused-function]
This marks the two functions as __maybe_unused.
Fixes: 4710b752e0 ("[media] v4l: Add Renesas R-Car FDP1 Driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This function is too big and too complex, making really hard
to understand what's there.
Split it into sub-routines, in order to make it easier to be
understood, and to allow gcc to better parse it.
As a bonus, it gets rid of a goto in the middle of a routine.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The dvb_net code has a really complex function, meant to handle
DVB network packages: it is long, has several loops and ifs
inside, and even cause warnings with gcc5.
Prepare it to be split into smaller functions by storing all
arguments and internal vars inside a struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Those formats are implemented by The DFK 23UP1300, DFK 23UX249 and
DFK 23UX250 USB 3.0 industrial cameras from The Imaging Source.
Signed-off-by: Edgar Thier <info@edgarthier.net>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The documentation simply mentioned that one of the four pixel orders was
used in the example. Now specify the exact pixelformat instead.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The formats have been added without a description, fix that.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The formats added by this patch are:
V4L2_PIX_FMT_SBGGR16
V4L2_PIX_FMT_SGBRG16
V4L2_PIX_FMT_SGRBG16
V4L2_PIX_FMT_SRGGB16 already existed before the patch. Rework the
documentation to match that of the other sample depths.
Also align the description of V4L2_PIX_FMT_SRGGB16 to match with other
similar formats.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Fix a typo on a word inside it.
Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
We should unlock before returning this error code in vpfe_reqbufs().
Fixes: 622897da67 ("[media] davinci: vpfe: add v4l2 video driver support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This is a patch to the vpfe_video.c file that fixes an indentation
warning reported by checkpatch.pl
Signed-off-by: Leo Sperling <leosperling97@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
When building with "make W=1", we get multiple harmless build warnings
for the vpfe driver:
drivers/staging/media/davinci_vpfe/dm365_resizer.c:241:1: error: 'static' is not at beginning of declaration [-Werror=old-style-declaration]
drivers/staging/media/davinci_vpfe/dm365_resizer.c: In function 'resizer_set_defualt_configuration':
drivers/staging/media/davinci_vpfe/dm365_resizer.c:831:16: error: initialized field overwritten [-Werror=override-init]
drivers/staging/media/davinci_vpfe/dm365_resizer.c:831:16: note: (near initialization for 'rsz_default_config.rsz_rsc_param[0].h_typ_c')
drivers/staging/media/davinci_vpfe/dm365_resizer.c:849:16: error: initialized field overwritten [-Werror=override-init]
drivers/staging/media/davinci_vpfe/dm365_resizer.c:849:16: note: (near initialization for 'rsz_default_config.rsz_rsc_param[1].h_typ_c')
All of them are trivial to fix without changing the behavior of the
driver, as "static const" is interpreted the same as "const static",
and VPFE_RSZ_INTP_CUBIC is defined as zero, so the initializations
are not really needed.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
It has never been possible to actually build this driver as
a loadable module, only built-in because the Makefile attempts
to build each file into its own module and fails:
ERROR: "mbus_to_pix" [drivers/staging/media/davinci_vpfe/vpfe_video.ko] undefined!
ERROR: "vpfe_resizer_register_entities" [drivers/staging/media/davinci_vpfe/vpfe_mc_capture.ko] undefined!
ERROR: "rsz_enable" [drivers/staging/media/davinci_vpfe/dm365_resizer.ko] undefined!
ERROR: "config_ipipe_hw" [drivers/staging/media/davinci_vpfe/dm365_ipipe.ko] undefined!
ERROR: "ipipe_set_lutdpc_regs" [drivers/staging/media/davinci_vpfe/dm365_ipipe.ko] undefined!
It took a long time to catch this bug with randconfig builds
because at least 14 other Kconfig symbols have to be enabled in
order to configure this one, and it was clearly only ever tested
as built-in with mainline kernels, if at all.
The solution is really easy: this patch changes the Makefile to
link all files into one module. As discussed previously, the
driver has never before used successfully as a loadable module,
but there is no reason to prevent that configuration.
Link: http://lkml.iu.edu/hypermail/linux/kernel/1512.1/02383.html
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This function just submits the urb much like mceusb_dev_resume; removing
it simplifies mce_request_packet.
Also add missing usb_kill_urb to mce_dev_probe.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Such debug message has a logic to track the IR status,
but it doesn't provide much info. So, get rid of it.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Update documentation for media_entity_notify to clearly state the usage
restrictions. This handler is intended for creating links between exiting
entities and should not used to create and register entities.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The current limit is too low for latest cards with 8+ tuners on a single slot.
IMHO, the most appropriate minimum default is 16.
Signed-off-by: Буди Романто, AreMa Inc <knightrider@are.ma>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
In randconfig builds that select VIDEO_EM28XX_V4L2 and
MEDIA_SUBDRV_AUTOSELECT, but not MEDIA_CAMERA_SUPPORT, we get
a Kconfig warning:
warning: (VIDEO_EM28XX_V4L2) selects VIDEO_MT9V011 which has unmet direct dependencies (MEDIA_SUPPORT && I2C && VIDEO_V4L2 && MEDIA_CAMERA_SUPPORT)
This avoids the warning by making that 'select' conditional on
MEDIA_CAMERA_SUPPORT. Alternatively we could mark EM28XX as
'depends on MEDIA_CAMERA_SUPPORT', but it does not seem to
have any real dependency on that itself.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
If MEDIA_SUBDRV_AUTOSELECT and VIDEO_GO7007 are both set, we
automatically select VIDEO_OV7640, but that depends on MEDIA_CAMERA_SUPPORT,
so we get a Kconfig warning if that is disabled:
warning: (VIDEO_GO7007) selects VIDEO_OV7640 which has unmet direct dependencies (MEDIA_SUPPORT && I2C && VIDEO_V4L2 && MEDIA_CAMERA_SUPPORT)
This adds another dependency so we don't accidentally select
it when it is unavailable.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The systime function uses struct timespec, which we want to stop
using in the kernel because it overflows in 2038. Fortunately,
this use in dibx000_common is in a function that is never called,
so we can just remove it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The stv090x driver uses the lookup table for signal strength already,
with this patch we use the lookup tables for carrier/noise ratio as well.
This has the advantage, that values for DVB-S and DVB-S2 are now
corresponding, while before they were way off. The values are now
proportional to real carrier/noise ratio, while before they were
corresponding to register values. So now applications are able to give
the user real carrier/noise ratio.
Because the output has to be within 0x0000...0xFFFF the three negative
values for DVB-S2 are omitted. This is no significant loss, because
reception is lost at 7.5 dB already (TT S2-1600, Cine S2), so the
negative values are not really important, and also for DVB-S they don´t
exist.
Signed-off-by: Joerg Riechardt <j.riechardt@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
We pass an int pointer to stk_camera_read_reg() but only write to the
highest byte. It's a bug on big endian systems and generally a nasty
thing to do and doesn't match the write function either.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The clock of IR can be provided by the clock provider and controlled
by common clock framework APIs.
Signed-off-by: Ruqiang Ju <juruqiang@huawei.com>
Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Remove DVB-T2 BER as it does not work at all and I didn't find
how to fix.
Fix DVB-T and DVB-C BER. It seems to return new some realistic
looking values.
Use (1 << 24) base for CNR calculations to keep it in line with
dvb logarithm functions.
Move all statistic logic to mn88473_read_status() function.
Use regmap_bulk_read() for reading multiple registers as a one go.
Many more and less minor changes.
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Implement DVBv5 statistics support for DVB-T, DVB-T2 and DVB-C. All
information was taken from the LinuxTV wiki, where Benjamin Larsson has
documented all registers:
https://www.linuxtv.org/wiki/index.php/Panasonic_MN88472
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
There is no need to call kfree() if memdup_user() fails, as no memory
was allocated and the error in the error-valued pointer should be returned.
Signed-off-by: Shailendra Verma <shailendra.v@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The address is 13 bits but it was stuffed in an u8, so 5 bits are
missing from the scancode.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
get_v4l2_ext_controls32() is used to convert the 32-bit compat struct into
native 64-bit representation. The function multiplies the array length by
the entry length before validating size. Perform the size validation
first.
Also use unsigned values for size computation.
Make similar changes to get_v4l2_buffer32() for multi-plane buffers.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
When compiled on i386, it produces several warnings:
./arch/x86/include/asm/bitops.h:457:22: warning: asm output is not an lvalue
./arch/x86/include/asm/bitops.h:457:22: warning: asm output is not an lvalue
./arch/x86/include/asm/bitops.h:457:22: warning: asm output is not an lvalue
./arch/x86/include/asm/bitops.h:457:22: warning: asm output is not an lvalue
./arch/x86/include/asm/bitops.h:457:22: warning: asm output is not an lvalue
./arch/x86/include/asm/bitops.h:457:22: warning: asm output is not an lvalue
I suspect that some gcc optimization could be causing the asm code to be
incorrectly generated. Splitting it into two macro calls fix the issues
and gets us rid of 6 smatch warnings, with is a good thing. As it should
not cause any troubles, as we're basically doing the same thing, let's
apply such change to vpe.c.
Cc: Benoit Parrot <bparrot@ti.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Despite being exported, there's no prototype for it at the
headers, as warned by sparse:
Fixes this sparse warning:
drivers/media/platform/ti-vpe/vpdma.c:1000:6: warning: no previous prototype for 'vpdma_enable_list_notify_irq' [-Wmissing-prototypes]
void vpdma_enable_list_notify_irq(struct vpdma_data *vpdma, int irq_num,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Worse than that, it is not even used, as making it static it
would produce:
drivers/media/platform/ti-vpe/vpdma.c:1000:13: warning: 'vpdma_enable_list_notify_irq' defined but not used [-Wunused-function]
static void vpdma_enable_list_notify_irq(struct vpdma_data *vpdma, int irq_num,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
So, let's just get rid of the dead code. If needed in the future,
someone could re-add it.
Cc: Benoit Parrot <bparrot@ti.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
davinci/vpfe_capture.c: In function 'vpfe_probe':
davinci/vpfe_capture.c:1992:9: warning: 'ret' may be used uninitialized
in this function [-Wmaybe-uninitialized]
return ret;
^~~
This is indeed correct, so if the kmalloc fails set ret to -ENOMEM.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The VPE was restricting the number of plane per buffer based on
the fact that if a particular format had color separation it was
meant to need 2 planes.
However NV12/NV16 are color separate format which are meant to be
presented in a single contiguous buffer/plane.
It could also be presented in a multi-plane as well if need be.
So we must support both modes for more flexibility.
The number of plane requested by user space was previously ignored
and was therefore always overwritten.
The driver now use the requested num plane as hint to calculate needed
offset when required.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Since there might be more then one instance it is better to
show the base address when dumping registers to help
with debugging.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
In preparation to add colorspace conversion support to VIP,
we need to turn csc.c into its own kernel module.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Add RAW8 and RAW16 data type to VPDMA.
To handle RAW format we are re-using the YUV CBY422
vpdma data type so that we use the vpdma to re-order
the incoming bytes, as the VIP parser assumes that the
first byte presented on the bus is the MSB of a 2
bytes value.
RAW8 handles from 1 to 8 bits.
RAW16 handles from 9 to 16 bits.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
When scaler is to be used we need to make sure that the input and
output frame size do not exceed the maximum frame sizes that the
scaler h/w can handle otherwise streaming stall as the scaler
cannot proceed.
The scaler buffer is limited to 2047 pixels (i.e. 11 bits) when
attempting anything larger (2048 for example) the scaler stalls.
Realistically in an mem2mem device we can only check for this type
of issue when start_streaming is called. We can't do it during the
try_fmt/s_fmt because we do not have all of the info needed at that
point. So instead when start_streaming is called we need to check
that the input and output frames size do not exceed the scaler's
capability. The only time larger frame size are allowed is when
the input frame szie is the same as the output frame size.
Now in the case where we need to fail, start_streaming must return
all previously queued buffer back otherwise the vb2 framework
will issue kernel WARN messages.
In this case we also give an error message.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Marek Szyprowski