linux-kernel - How to use "DTV_FE_CAPABILITY" command for Frontend.h of Linux DVB

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Date:   Wed, 23 Jun 2021 14:15:51 +0800
From:   YP WU <yp.wu@...iatek.com>
To:     <yp.wu@...iatek.com>, <leo.hsiao@...iatek.com>,
        <Lecopzer.Chen@...iatek.com>, <mchehab@...nel.org>,
        <gustavoars@...nel.org>, <hverkuil-cisco@...all.nl>,
        <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <Jason-BF.Huang@...iatek.com>, <francis.lee@...iatek.com>
Subject: How to use "DTV_FE_CAPABILITY" command for Frontend.h of Linux DVB 

Hello, dvb frontend maintainer:
	I work at mediatek company. Currently I develop TV with Linux DVB system.    
	I would like to implement the following LNB use cases: user space would like to know if frontend device node have LNB or not.
I want to use "DTV_FE_CAPABILITY" to represent above LNB capability, but I am afraid that my usage is not suitable to the original definition.    
So I would like to consult the following quesitons: 
1. The use case for DTV_FE_CAPABILITY in DVB property command.
2. Does it have any restriction for using this command?
3. What’s your suggestion for using this command?

File path: include/uapi/linux/dvb/Frontend.h
#define DTV_FE_CAPABILITY	16

Sorry to bother you and thanks for your helps.
BRs,
YP