topic Question regarding VADC feeding to CSI module in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/Question-regarding-VADC-feeding-to-CSI-module/m-p/468037#M73856 <HTML><HEAD></HEAD><BODY><P>Hi guys,</P><P>I have 2 questions regarding the NTSC video input (Vadc) of the i.MX6soloX SoC.</P><P>I currently have a problem with reading the NTSC camera through Vadc using CSI port. However, CSI captured data is only dummy values. I reviewed the mxc_vadc.c driver to find out how data is handed over to CSI from Vadc module.</P><P>Question #1: Everything on the vadc driver as well as CSI driver in fsl_csi.c seem to be good. Only one thing I got confused is in the IOMUXC_GPR_GPR5 register. The bit field #28-27 in this register in the CSI2_MUX_CTRL for the CSI2 port. It says 2 things that I don't know: </P><P>CSI2 input mux control</P><P>- 00 CSI2 takes input from external pins (configured via IOMUXC)</P><P>- 01 CSI2 takes input from the composite video decoder</P><P>- 10 CSI2 takes input from the VADC-to-CSI capture circuit</P><P>- 11 CSI2 inputs are tied to GND.</P><P>My question is: What is the different between "CSI2 takes input from the composite video decoder" and "CSI2 takes input from the VADC-to-CSI capture circuit" ?!?</P><P>What is the composite video decoder?! how is it different from the embedded decoder in the VADC-to-CSI capture circuit?! I tried to set the input using VADC-to-CSI and result is "No SOF detected". But If I use the "input from composite video decoder", then I always have SOF no matter the NTSC camera is connected or not.</P><P></P><P>Question #2: When I try to capture 1 frame from the CSI data with YUV444, fram size is 720x480 pixels, I got only 720*480 bytes (not words) of the data, remaining is 0xFF. This means the DMA controller is passing only 720x480bytes to the FB1/2. Meanwhile the CSIFBUF_PARA and CSIDMASA_FB1/2 parameters are correctly set for 720x480 words size.</P><P>My question is: do I need to do any further setting in the CSI driver to have a full-frame data captured?!</P><P></P><P>Also, in the reference manual for the chip, sometime say "video decoder", sometime says "TV decoder". Is it the same embedded video decoder on the chip? or something else?!! Am I missing something here!? So confused.</P><P>Can anybody give me some advice/tips for this?!</P><P>Also, is there anybody got the NTSC video input works with the i.mx6solox?! could you share the driver version, please?!</P><P>(I am using yoto with kernel 3.10.53xx version.)</P><P>Thank you!</P></BODY></HTML> Wed, 09 Dec 2015 05:35:17 GMT davidtrinh 2015-12-09T05:35:17Z Question regarding VADC feeding to CSI module https://community.nxp.com/t5/i-MX-Processors/Question-regarding-VADC-feeding-to-CSI-module/m-p/468037#M73856 <HTML><HEAD></HEAD><BODY><P>Hi guys,</P><P>I have 2 questions regarding the NTSC video input (Vadc) of the i.MX6soloX SoC.</P><P>I currently have a problem with reading the NTSC camera through Vadc using CSI port. However, CSI captured data is only dummy values. I reviewed the mxc_vadc.c driver to find out how data is handed over to CSI from Vadc module.</P><P>Question #1: Everything on the vadc driver as well as CSI driver in fsl_csi.c seem to be good. Only one thing I got confused is in the IOMUXC_GPR_GPR5 register. The bit field #28-27 in this register in the CSI2_MUX_CTRL for the CSI2 port. It says 2 things that I don't know: </P><P>CSI2 input mux control</P><P>- 00 CSI2 takes input from external pins (configured via IOMUXC)</P><P>- 01 CSI2 takes input from the composite video decoder</P><P>- 10 CSI2 takes input from the VADC-to-CSI capture circuit</P><P>- 11 CSI2 inputs are tied to GND.</P><P>My question is: What is the different between "CSI2 takes input from the composite video decoder" and "CSI2 takes input from the VADC-to-CSI capture circuit" ?!?</P><P>What is the composite video decoder?! how is it different from the embedded decoder in the VADC-to-CSI capture circuit?! I tried to set the input using VADC-to-CSI and result is "No SOF detected". But If I use the "input from composite video decoder", then I always have SOF no matter the NTSC camera is connected or not.</P><P></P><P>Question #2: When I try to capture 1 frame from the CSI data with YUV444, fram size is 720x480 pixels, I got only 720*480 bytes (not words) of the data, remaining is 0xFF. This means the DMA controller is passing only 720x480bytes to the FB1/2. Meanwhile the CSIFBUF_PARA and CSIDMASA_FB1/2 parameters are correctly set for 720x480 words size.</P><P>My question is: do I need to do any further setting in the CSI driver to have a full-frame data captured?!</P><P></P><P>Also, in the reference manual for the chip, sometime say "video decoder", sometime says "TV decoder". Is it the same embedded video decoder on the chip? or something else?!! Am I missing something here!? So confused.</P><P>Can anybody give me some advice/tips for this?!</P><P>Also, is there anybody got the NTSC video input works with the i.mx6solox?! could you share the driver version, please?!</P><P>(I am using yoto with kernel 3.10.53xx version.)</P><P>Thank you!</P></BODY></HTML> Wed, 09 Dec 2015 05:35:17 GMT https://community.nxp.com/t5/i-MX-Processors/Question-regarding-VADC-feeding-to-CSI-module/m-p/468037#M73856 davidtrinh 2015-12-09T05:35:17Z Re: Question regarding VADC feeding to CSI module https://community.nxp.com/t5/i-MX-Processors/Question-regarding-VADC-feeding-to-CSI-module/m-p/468038#M73857 <HTML><HEAD></HEAD><BODY><P>Update: I got these problems solved. The drivers work perfectly. Just my mistake passing wrong params.</P></BODY></HTML> Wed, 09 Dec 2015 08:26:11 GMT https://community.nxp.com/t5/i-MX-Processors/Question-regarding-VADC-feeding-to-CSI-module/m-p/468038#M73857 davidtrinh 2015-12-09T08:26:11Z