Karicheri, Muralidharan a écrit :
Jean-Philippe,
4) Develop and integrate mt9p031 sensor driver and integrate it with
vpfe_capture.
Regarding point 4, how is the cmos capture part supposed to work with the
HD video standards ?
Currently, to set the cmos capture resolution we have to :
set a video HD standards.
use TRY_FMT, S_FMT to set a windows that fits into the standard.
Currently, the highest resolution avilables are in the V4L2_STD_1080*
standard.
mt9t* chips have resolution up to 2048x1536
2Mpixels sensor comes with resolution like 1600x1200
not to mention the mt9p031 sensor.
What is the right way to handle this ?
add a V4L2_STD_IMAGER_STD with a 4096x4096 or higher resolution ?
I know this is an issue and was discussed in the v4l mailing list as
part HD timing API RFC discussion. The conclusion then was to use
S_FMT to set the frame size as done in mt9t031 driver. However currently
mt9t031 doesn't allow setting frame rate. I think we need to discuss
this in v4l list as part of this development activity. Another issue
with the current implementation of mt9t031 is that how to make use
of the Resizer at the VPFE to scale up or down the image output from the
mt9t031. There is an effort to add device node to sub devices (Hans has
indicated that to me last week). In that case, application may be able to use
S_FMT at the sub device node and then call S_FMT at the video node (capture)
and capture will be able to calculate proper scaling factor
and apply the same at the Resizer. I suggest to discuss this as well
in the v4l mailing list as part of this development activity. Another
issue is how do we handle the i2c switch that is present in the sensor
header? There are patches being reviewed in the i2c mailing list to
handle these devices in the i2c driver. IMO, this piece is required as
well.
So do you want to work on this?
I am sorry, I currently have no hardware with the corresponding cmos chips
at my disposal. But we are in the process of designing a new hardware, and maybe
one of this sensor will be used.
-Murali
5) one shot mode Preview and Resize drivers on DM355/DM365 using memory
to memory API (RFC recently submitted by Samsung)
6) vpfe capture enhancements using Previewer and Resizer in continuous
mode.
7) vpif display enhancements for HD video.
8) Adding AEW/AF/Histogram support in vpfe capture driver.
Thanks.
Murali Karicheri
Software Design Engineer
Texas Instruments Inc.
Germantown, MD 20874
phone: 301-407-9583
email: [email protected]
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