Forums - Is I2C burst mode supported for Lens driver at Qualcomm platform

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Is I2C burst mode supported for Lens driver at Qualcomm platform
Join Date: 10 Feb 21
Posts: 1
Posted: Tue, 2021-03-02 08:19

Dear Qualcomm team and QDN community,                                    

This is about QUALCOMM cam sensor Actuator  integration so the subject might be differnet.

I wonder if the I2C burst mode is supported or present a limitation within QUALCOMM script

Any actuator module should has an XML file containing I2C setting to initialize the HW lens driver.

This XML should be compiled into a binary within  script

Below blog shares an examples of XML organization(below) where we see I2C data are written byte by byte, so each register is handled

separately(see below)  while we need to send I2C data at once (I2C Burst mode).

      <!--Register address that is accessed -->
      <!--If operation is WRITE, registerData is the data value to be written into the specified register address
          If operation is READ, registerData is the number of bytes to be read from the specified register address -->
      <!--Register address / data size in bytes -->
      <regAddrType range="[1,4]">1</regAddrType>
      <!--Register address / data size in bytes -->
      <regDataType range="[1,4]">1</regDataType>
      <!--Type of the operation
          Valid values are: WRITE, READ, POLL -->
      <!--Delay in micro seconds -->
    <!--Register setting configuration
        Contains: register address, register data, register address type, register data type, operation and delay in micro seconds -->

   The <regAddrType range="[1,4]">1</regAddrType> limits the burst size to 4 bytes maximum.

Is it possible  to send I2C data at once ? is it a limitation of  or a limitation of  QUALCOMM platform ? can the script be modified to

support I2C burst mode ?


Thanks so much in advance.

Kind regards,



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