Capture video on DM8148 with V4l2

No, Composite video input is not supported, you will have to add it.

Regards,

Brijesh

Hello,

If you are using EZSDK you should follow this user guide to add the external decoder:

processors.wiki.ti.com/.../DM81xx_AM38xx_Adding_External_Decoders_to_V4L2_Capture_Driver

If you are using TVP5147, the TVP5147 driver is already avaiable as a part of Linux kernel under $Kernel/driver/media/tvp514x.c. You just need to hook this up to V4L2 capture driver.



EZSDK has different M3 firmware and utility to load M3 with PSP.

./slaveloader startup VPSS-M3 ti814x_hdvpss_1G.xem3 is the usage of PSP.

You could find the slaveloader in syslink folder/ packages/ti/syslink/samples/hlos/slaveloader


EZSDK uses the below command for loading the firmwares:

./firmware_loader 2 dm814x_hdvpss.xem3 start
or in case of v4l2 usage:
firmware_loader 2 /usr/share/ti/ti-media-controller-utils/dm814x_hdvpss_v4l2.xem3 start -i2c 0

If you want to use only V4L2 capture + V4L2 display + fbdev than ti814x_hdvpss_1G.xem3 is fine, if you want to use encode/decode or any of OpenMax components you need to use dm814x_hdvpss_v4l2.xem3



BR
Margarita

Hi,

This crashes while connecting your TVP driver to Vin. please put some debug prints to check why it is crashing.

Rgds,
Brijesh

Hi Brijesh,

Now decoder was registered as v4l2 sub device. I'm trying to capture video with an application example but I got the message:

""VPSS_FVID2: create handle is NULL""

I think that the decoder configuration in struct ti81xxvin_subdev_info are wrong: Below you can see how i configured it:

.name    = TVP5147_INST0,
        .board_info = {
            I2C_BOARD_INFO("tvp5147m1", 0x5c),
            .platform_data = &tvp5147_pdata,
        },
        .i2c_adapter = 3,
        .vip_port_cfg = {
            .ctrlChanSel = VPS_VIP_CTRL_CHAN_SEL_15_8,
            .ancChSel8b = VPS_VIP_ANC_CH_SEL_DONT_CARE,
            .pixClkEdgePol = VPS_VIP_PIX_CLK_EDGE_POL_RISING,
            .invertFidPol = 0,
            .embConfig = {
                .errCorrEnable = 1,
                .srcNumPos = VPS_VIP_SRC_NUM_POS_DONT_CARE,
                .isMaxChan3Bits = 0,
            },
            .disConfig = {
                .fidSkewPostCnt = 0,
                .fidSkewPreCnt = 0,
                .lineCaptureStyle =
                    VPS_VIP_LINE_CAPTURE_STYLE_DONT_CARE,
                .fidDetectMode =
                    VPS_VIP_FID_DETECT_MODE_DONT_CARE,
                .actvidPol = VPS_VIP_POLARITY_DONT_CARE,
                .vsyncPol =  VPS_VIP_POLARITY_DONT_CARE,
                .hsyncPol = VPS_VIP_POLARITY_DONT_CARE,
            }
        },
        .video_capture_mode =
           VPS_CAPT_VIDEO_CAPTURE_MODE_SINGLE_CH_NON_MUX_EMBEDDED_SYNC,
        .video_if_mode = VPS_CAPT_VIDEO_IF_MODE_8BIT,
        .input_data_format = FVID2_DF_YUV420P,

Regards,

Tailan Mendes

it seems create params are wrong. please check them..

Rgds,
Brijesh

Hi Brijesh,

Do you think that it could be a problem with the camera??

Regards,

Tailan

One more detail, this message ("VPSS_FVID2: create handle is NULL") occurs when I send the command VIDIOC_STREAMON