android - 错误 : NOT SUPPORT DVFS LOCK android application

Question

在 galaxy s2 手机上声明我的 android 应用程序后，出现以下错误:

错误:不支持 DVFS 锁定

我用谷歌搜索了这个问题，但没有找到任何解决此类问题的方法。

所以我需要你的帮助。有没有人可以指导我做同样的事情？

Answer 1

引自 https://android.googlesource.com/kernel/omap/+/11038e7ec6b415b28f95cd7526be72ee6b8d4607/arch/arm/mach-omap2/dvfs.c :

DVFS is a technique that uses the optimal operating frequency and voltage to * allow a task to be performed in the required amount of time. * OMAP processors have voltage domains whose voltage can be scaled to * various levels depending on which the operating frequencies of certain * devices belonging to the domain will also need to be scaled. This voltage * frequency tuple is known as Operating Performance Point (OPP). A device * can have multiple OPP's. Also a voltage domain could be shared between * multiple devices. Also there could be dependencies between various * voltage domains for maintaining system performance like VDD * should be at voltage v1 when VDD is at voltage v2. * * The design of this framework takes into account all the above mentioned * points. To summarize the basic design of DVFS framework:- * * 1. Have device opp tables for each device whose operating frequency can be *
scaled. This is easy now due to the existance of hwmod layer which * allow storing of device specific info. The device opp tables contain * the opp pairs (frequency voltage tuples), the voltage domain pointer * to which the device belongs to, the device specific set_rate and * get_rate API's which will do the actual scaling of the device frequency * and retrieve the current device frequency. * 2. Introduce use counting on a per VDD basis. This is to take care multiple * requests to scale a VDD. The VDD will be scaled to the maximum of the * voltages requested. * 3. Keep track of all scalable devices belonging to a particular voltage * domain the voltage layer. * 4. Keep track of frequency requests for each of the device. This will enable * to scale individual devices to different frequency (even w/o scaling * voltage aka frequency throttling) * 5. Generic dvfs API that can be called by anybody to scale a device opp. * This API takes the device pointer and frequency to which the device * needs to be scaled to. This API then internally finds out the voltage * domain to which the device belongs to and the voltage to which the voltage * domain needs to be put to for the device to be scaled to the new frequency * from the device opp table. Then this API will add requested frequency into * the corresponding target device frequency list and add voltage request to * the corresponding vdd. Subsequently it calls voltage scale function which * will find out the highest requested voltage for the given vdd and scales * the voltage to the required one and also adds corresponding frequency * request for that voltage. It also runs through the list of all * scalable devices belonging to this voltage domain and scale them to the * appropriate frequencies using the set_rate pointer in the device opp * tables. * 6. Handle inter VDD dependecies. This will take care of scaling domain's voltage * and frequency together. * * * DOC: The Core DVFS data structure: * ================================== * Structure Name Example Tree * --------- * /|\ +-------------------+ +-------------------+ * | |User2 (dev2, freq2)+---\ |User4 (dev4, freq4)+---\ * |
+-------------------+ | +-------------------+ | * (struct omap_dev_user_list) | | * |
+-------------------+ | +-------------------+ | * | |User1 (dev1, freq1)+---| |User3 (dev3, freq3)+---| * \|/
+-------------------+ | +-------------------+ | * --------- | | * /|\
+------------+------+ +---------------+--+ * | | DEV1 (dev, | | DEV2 (dev) | * (struct omap_vdd_dev_list)|omap_dev_user_list)| |omap_dev_user_list| *
| +------------+------+ +--+---------------+ * \|/ /|\ /-----+-------------+------> others.. * --------- Frequency | * /|\ +--+------------------+ * | | VDD_n | * | | (omap_vdd_dev_list, | * (struct omap_vdd_dvfs_info)** | omap_vdd_user_list) | * |
+--+------------------+ * | | (ROOT NODE: omap_dvfs_info_list) * \|/ | * --------- Voltage ---+-------------+----------> others.. * /|\ \|/ +-------+----+ +-----+--------+ * | | vdd_user2 | | vdd_user3 | * (struct omap_vdd_user_list) | (dev, volt)| | (dev, volt) | * \|/ +------------+ +--------------+ * --------- * Key: ** -> Root of the tree. * NOTE: we use the priority to store the voltage/frequency * * For voltage dependency description, see: struct dependency: * voltagedomain -> (description of the voltagedomain) *
omap_vdd_info -> (vdd information) *
omap_vdd_dep_info[]-> (stores array of depedency info) *
omap_vdd_dep_volt[] -> (stores array of maps) *
(main_volt -> dep_volt) (a singular map) */

这意味着如果您的手机不支持它，您的应用程序将无法在其上运行。我想没有别的办法了。