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DM6467: davincihd_capture.channel0_numbuffers bootarg?

Emile Semmes16436
Prodigy 20 points


What is the purpose of the the davincihd_capture.channel0_numbuffers U-Boot bootarg? Does the DMAI or any other framework need this?

I didn't find any information in the PSP documentation regarding this environment variable.

Thanks!

  • 0
    TI__Mastermind 41665 points

    That value feeds into the DavinciHD video capture driver, you can see where it is brought in within the lsp_2_00_00_140\ti-davinci\linux-2.6.18_pro500\drivers\media\video\davinci\davincihd_capture.c. It looks like it defines the number of frame buffers that the driver allocates, why it is important to set in the bootargs I am not sure, likely the demos are dependent on having multiple buffers. This is also mentioned in section 4.2.1 and 4.2.2 of dvsdk_2_00_00_22\PSP_02_00_00_140\docs\dm6467\SPRUG99.pdf, though there they cut off the 'davincihd_capture' portion.