Linux/TDA2EXEVM: TDA2 ISSCAPTURE

Hi ckhsu,

ISS Capture driver supports all formats, but link is limited to few formats. You could easily add support for these formats in the iss capture link. The change required are in this check data format function and buffer allocation function. Can you make the changes and try it out?

Regards,
Brijesh

Hi Brijesh:
I see. I paste the places that should be modified in the end of the response, please let me know whether it is correct place or not.
However from what I understand, the LEGACY YUV420 8 bit frame is send through MIPI as following:
U1Y1Y2 U3Y3Y4 ...... U637Y637Y638U639Y639Y640 ==> Odd line
V1Y1Y2 V3Y3Y4 ...... V637Y637Y638V639Y639Y640 ==> Even line
......
In LEGACY YUV 420 8bit the pitch is fixed, it should be okay to add in the ISSCAPTURE link.

But the YUV 420 8bit data in the MIPI is
Y1Y2......Y639Y640 ==> Odd lines
U1Y1V1Y2U3Y3V3Y4......U637Y637V637Y638U639Y639V639Y640==> Even Lines
And the Odd and Even lines are in different sizes. And how this should be modify in the Link code? Or should this type be ignore in the link? Because This color space is quite different from the original UYVU422 or YUV420SP etc, I don't know how this should be done in described in the QueueInfo and Frames buffer struct.
Can you give me some hints about this color space?


I suppose the place to add the code is in this part inside IssCaptureLink_drvCreate.
//////////////////////////////////////
for (chIdx = 0U; chIdx < pPrm->numCh; chIdx++)
{
pitchMul = getPitchMultiplier(&pPrm->outParams[chIdx],
pObj->createArgs.videoIfMode,
pObj->createArgs.videoIfWidth);

pQueChInfo = &pObj->info.queInfo[0U].chInfo[chIdx];
pQueChInfo->width = pPrm->outParams[chIdx].width;
pQueChInfo->height = pPrm->outParams[chIdx].height;
pQueChInfo->startX = 0;
pQueChInfo->startY = 0;
pQueChInfo->pitch[0] =
SystemUtils_align(pObj->createArgs.outParams[chIdx].maxWidth *
pitchMul, ISSCAPTURE_LINK_BUF_ALIGNMENT);
pQueChInfo->pitch[1] = 0;
pQueChInfo->pitch[2] = 0;
pQueChInfo->flags = System_Link_Ch_Info_Set_Flag_Data_Format(pQueChInfo->flags,
pObj->createArgs.outParams[chIdx].dataFormat);
pQueChInfo->flags = System_Link_Ch_Info_Set_Flag_Scan_Format(pQueChInfo->flags,
SYSTEM_SF_PROGRESSIVE);
/* Using complex IO cont flag instead of PHY/PPI, as CAL would require
an instance of complex io for an instance of PHY */
UTILS_assert(VPS_ISS_CAL_MAX_CMPLXIO_INST >
pObj->createArgs.outParams[chIdx].phyInstance);
}
/////////////////////////////////////////
I suppose the Bualloc is in Int32 IssCaptureLink_drvAllocFrames(IssCaptureLink_Obj *pObj)
And in
if(System_useLinkMemAllocInfo(
&pObj->createArgs.memAllocInfo)==FALSE)
{
fvid2Frame->addr[0][0] =
Utils_memAlloc(
UTILS_HEAPID_DDR_CACHED_SR,
pObj->outBufSize,
SYSTEM_BUFFER_ALIGNMENT
);
}
else
{
fvid2Frame->addr[0][0] =
System_allocLinkMemAllocInfo(
&pObj->createArgs.memAllocInfo,
pObj->outBufSize,
SYSTEM_BUFFER_ALIGNMENT
);
}
/////////////////////////////////////////////////////////////

Regards,
/ckhsu

Hi Brijesh:
The MIPI 420 information can be found in the MIPI document. And there is a draft documents on net
electronix.ru/.../index.php
Please see the page 77 for YUV420 8 bit packet format.

Regards,
/ckhsu