data2/text/range/0-5000/1008079.txt

Ticket Name: TDA2SG: How can output yuv422 format in the display

Query Text:
Part Number: TDA2SG Hi ,expert: My system has three overlay in the display,like this : 1,VID1: BGRA32_8888 2.VID2: YUV420SP 3.GFX: BGRA32_8888 general, TDA2s use the rgb888 output to display, and my system is work ok,Now I want to use the yuv422( YUYV) to the display, I see the "dssm2mwb" link ,I found this link may need "sync" link and then use buftype of "SYSTEM_BUFFER_TYPE_VIDEO_FRAME_CONTAINER". I have the question as follow: 1,sync need 3 overlay framerate is same,but my system is not satisfy and overlay has different display framesrate, so i think this solution may not very well . 2,Is There other solution to yuv422 display output thanks!

Responses:
Hi, do you mean yuv422 over embedded sync output interface? Rgds, Brijesh

no, I mean if i use sync link ,if one of queue has no video ,sync will no send cmd to process ,so I think this solution is not suit. Now I want to checkout the problem: 1,VID1: BGRA32_8888 ->YUYV 2.VID2: YUV420SP 3.GFX: BGRA32_8888 ->YUYV overlay like this,the display can work? 2) Is there some usecase of yuv422 output I can refer

hi, #1, in this case, you would require to change sync link to support this feature. Currently it is not supported. sync link does not output if one of the input is not available. #2, do you mean to use 3 video pipelines, each with different data type? yes, display will work with this combination #3, where yuv422 do you require? Is it at the output of capture link or input to the display link? Regards, Brijesh

output in the dispaly link , if i dont want to use "sync",I will do as follow: change RGBA328888 to YUYV format and it will make 3 video pipeline dataformat to 1,VID1: YUYV 2.VID2: YUV420SP 3.GFX: YUYV is the display link support "YUYV" and "YUV420sp" format output.

Yes, display link supports both of these formats. Rgds, Brijesh

I use capture_dsswb link ,and set vout format BT656 and DISPC_VP1_CONTROL.TDMENABLE = 0x1: TDM enabled DISPC_VP1_CONTROL. TDMPARALLELMODE = 0x0: 8-bit parallel output interface selected DISPC_VP1_CONTROL. TDMCYCLEFORMAT = 0x2: 2 cycles for 1 pixel DISPC_DATA1_CYCLE1 = 0x8 DISPC_DATA1_CYCLE2 = 0x8 DISPC_DATA1_CYCLE3 = 0x0 but my capture_dsswb has no video data,so I think writeback pipeline do not well work. how can I use writeback?

Hi, these two things are different and independent. could you help me with what exactly you are trying to enable? - are the three input video pipelines enabled? - why are you enabling TDM for BT656 output? - why are you enabling dss wb path? Regards, Brijesh