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To list the Yocto components, use:

bitbake-layers show-recipes

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bitbake -s

Apply

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Patch and Build

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Component

1) Add the below line to the recipe of the component you need to modify.

        SRC_URI += "file://<name>.patch"                              

        eg:  SRC_URI += "file://temp.patch" in  meta-rdk-video/recipes-extended/devicesettings/devicesettings_git.bb          

2) Create a folder named "files" in the same folder of recipe. 

eg: In meta-rdk-video/recipes-extended/devicesettings/

3) Create a blank file with the same name given in the recipe.

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4) bitbake <recipe> -c devshell

         eg: bitbake tdk devicesettings -c devshell 

5) Do "quilt top" and verify if the patch file is reflected there. 

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        patches/temp.patch

6) quilt add "filename which you need to modify" (If multiple files are there, then add all those)

...

7) Make necessary modifications required for these files. 

8) quilt refresh

9) Verify if your modifications are reflected in the patch file.

         vi patches/<name>.patch

10) Now replace this patch file with original one in files folder.

         eg: cp patches/temp.patch ~/.../meta-rdk-video/recipes-extended/tdkdevicesettings/files/testtemp.patch 

11) exit

12) Do a clean and then build.

bitbake -ccleanall tdkccleanall devicesettings bitbake tdk

bitbake devicesettings