The type field of VIDIOC_CROPCAP does not allow the MPLANE variants, just
as all the other crop/selection related ioctls.

Fix the description of CROPCAP and G_CROP and make the text describing
this consistent for all selection ioctls.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Handle values like ~0 as width, height, left or top fields.
Just strip off the top 16 bits will ensure that the calculations
remain OK.

Found with v4l2-compliance.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

The vivid driver reports a range of frame intervals for non-webcams, when in fact
the frame interval is fixed for those inputs as it depends on the DV timings or
standard. Just report the single discrete frame interval instead.

Caught by v4l2-compliance.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Allow setting the same timings as the current timings (i.e., do nothing in that
case). The code was actually there, but the vb2_is_busy() call was done before
the timings check instead of afterwards.

Found by v4l2-compliance.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add support for: PIX_FMT_SBGGR8, SGBRG8, SGRBG8 and SRGGB8.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Use the release callback of the v4l2_device to clean up the memory.
This prevents vivid from breaking if someone tries to unbind the
driver.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

This turns this driver into a platform device. This ensures that it
appears in /sys/bus/platform_device since it now has a proper parent
device.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add support for the packed YUV formats YUV444, YUV555, YUV565 and YUV32.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add support for the four byte BGR666 format.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

The documentation is not clear whether this is a three or four byte
format. Clarify this.

Also move the BGR666 format to the other 32 bit formats.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add support for the one-byte-per-pixel RGB332 format.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add support for the YUV 4:4:4 formats NV24 and NV42.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Only RGB555X was supported, add support for the other two variants.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Clarify which formats have an alpha channel and which do not by
using 'x' instead of 'a' if there is no alpha channel.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add support for (A/X)RGB444 formats.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Everything is in place to support these formats, so add them to
the list.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add support in vivid for downsampling. Most of the changes are in
vivid_copy_buffer which needs to know about the right line widths.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Make vivid aware of the difference of planes and buffers. Note that
this does not yet add support for hor/vert downsampled formats.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

These fields are necessary to handle the new planar formats.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

The last part of the vivid-tpg refactoring: split off the pattern
drawing code into a function of its own. This greatly improves the
readability and maintainability of this code.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

This moves the drawing code for the extras (border, square, etc) to
a function of its own instead of having this in the main for loop.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Any parameters related to drawing 'extras' like the border, the square,
etc. are moved to struct tpg_draw_params.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add a new function that fills in pattern-related fields in struct
tpg_draw_params.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Replace local variables by fields in the tpg_draw_params struct.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

This is needed to refactor the drawing function which is much too big.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Added 'const' to several functions where that is possible to do.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add helper functions to handle horizontal downscaling and horizontal
scaling.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add monochrome support to the TPG.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Now that the support for hor/vert downsampled planar formats is in
place we can add support for such formats to the TPG.

This patch adds support for:

V4L2_PIX_FMT_YUV420M
V4L2_PIX_FMT_YVU420M
V4L2_PIX_FMT_YUV420
V4L2_PIX_FMT_YVU420
V4L2_PIX_FMT_YUV422P
V4L2_PIX_FMT_NV16
V4L2_PIX_FMT_NV61
V4L2_PIX_FMT_NV12
V4L2_PIX_FMT_NV21
V4L2_PIX_FMT_NV12P
V4L2_PIX_FMT_NV21P
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Implement horizontal and vertical downsampling when filling in the
plane. The TPG is now ready to support such formats.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

This will just skip lines/pixels since color fidelity is not quite
as important here as it is with the test patterns themselves.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

gen_twopix() is always called twice: once for the first and once for
the second pixel. Improve the code to properly average the two if the
format requires horizontal downsampling.

This is necessary for patterns like 1x1 red/blue checkers.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

When dealing with vertical downsampling two successive lines have to be
averaged. In the case of the test pattern generator that only happens
if the two lines are using different patterns. So precalculate the average
between two pattern lines: one of pattern P and one of pattern P + 1.

That way there is no need to do any on-the-fly downsampling: it's all done
in the precalculate phase.

This patch also implements horizontal downsampling in the precalculate phase.
The only thing that needs to be done is to half the width since the actual
downsampling happens when two pixels at a time are generated.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

This is step one of supporting horizontal and vertical downsampling.
This just adds support for the h/vdownsampling fields and it increases
the maximum number of planes to 3.

Currently none of the planar formats need horizontal or vertical
downsampling, so this change has no effect at the moment.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add helpers functions to determine the line widths and image sizes
for planar formats that are stores in a single buffer.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add a new field that contains the number of buffers. This may be
less than the number of planes in case multiple planes are combined
into one buffer.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Sequential top-bottom/bottom-top fields are not supported as video loopback.
This is too much work to implement for field settings that are rarely used.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

The grayscale values are still full range sRGB, so don't add the
limited range offset.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Add a 2x2 checker patterns and 1x1 and 2x2 red/blue checker patterns.

Useful for testing 4:2:2 and 4:2:0 formats.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

The successive TOP/BOTTOM fields did not move as they should: only
every other field actually changed position.

The cause was that the tpg needs to know if it is dealing with a
FIELD_ALTERNATE case since that requires slightly different handling.

So tell the TPG whether or not the field setting is for the ALTERNATE
case or not.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>