往期知识点记录:
- 鸿蒙(HarmonyOS)应用层开发(北向)知识点汇总
- 鸿蒙(OpenHarmony)南向开发保姆级知识点汇总~
- OpenHarmony(鸿蒙南向开发)------轻量系统STM32F407芯片移植案例
- OpenHarmony(鸿蒙南向开发)------Combo解决方案之W800芯片移植案例
- OpenHarmony(鸿蒙南向开发)------小型系统STM32MP1芯片移植案例
- OpenHarmony(鸿蒙南向开发)------标准系统方案之瑞芯微RK3568移植案例(上)
- OpenHarmony(鸿蒙南向开发)------标准系统方案之瑞芯微RK3568移植案例(下)
- OpenHarmony(鸿蒙南向开发)------标准系统方案之瑞芯微RK3566移植案例(上)
- 持续更新中......
本文章是基于瑞芯微RK3566芯片的khdvk_3566b开发板,进行标准系统相关功能的移植,主要包括产品配置添加,内核启动、升级,音频ADM化,Camera,TP,LCD,WIFI,BT,vibrator、sensor、图形显示模块的适配案例总结,以及相关功能的适配。
产品配置和目录规划
产品配置
在产品//vendor/
目录下创建以kaihong名字命名的文件夹,并在kaihong文件夹下面新建产品命的文件夹khdvk_3566b。
在//vendor/kaihong/khdvk_3566b
目录下创建config.json文件。该文件用于描述产品所使用的SOC以及所需的子系统。配置如下
{
"product_name": "khdvk_3566b",
"device_company": "kaihong",
"device_build_path": "device/board/kaihong/build",
"target_cpu": "arm",
"type": "standard",
"version": "3.0",
"board": "khdvk_3566b",
"enable_ramdisk": true,//是否支持ramdisk二级启动
"build_selinux": true,// 是否支持selinux权限管理
"subsystems": [
{
"subsystem": "arkui",
"components": [
{
"component": "ace_engine_standard",
"features": []
},
{
"component": "napi",
"features": []
}
]
},
.
.
.
{
"subsystem": "thirdparty",
"components": [
{
"component": "musl",
"features": []
}
]
}
]
}
主要的配置内容包括:
- product_device:配置所使用的SOC。
- type:配置系统的级别,这里直接standard即可。
- subsystems:系统需要启用的子系统。子系统可以简单理解为一块独立构建的功能块。
已定义的子系统可以在//build/subsystem_config.json
中找到。当然你也可以定制子系统。
这里建议先拷贝Hi3516DV300开发板的配置文件,删除掉hisilicon_products这个子系统。这个子系统为Hi3516DV300 SOC编译内核,不适合rk3566
目录规划
device
├── board --- 单板厂商目录
│ └── kaihong --- 单板厂商名字:
│ └── khdvk_3566b --- 单板名:khdvk_3566b,主要放置开发板相关的驱动业务代码
└── soc --- SoC厂商目录
└── rockchip --- SoC厂商名字:rockchip
└── rk3566 --- SoC Series名:rk3566,主要为芯片原厂提供的一些方案,以及闭源库等
vendor
└── kaihong --- 开发产品样例厂商目录
└── khdvk_3566b --- 产品名字:产品、hcs以及demo相关
内核启动
二级启动
二级启动简单来说就是将之前直接挂载sytem,从system下的init启动,改成先挂载ramdsik,从ramdsik中的init 启动,做些必要的初始化动作,如挂载system,vendor等分区,然后切到system下的init。
Rk3566适配主要是将主线编译出来的ramdisk打包到boot.img中,主要有以下工作:
1.使能二级启动
在//vendor/kaihong/khdvk_3566b/config.json中使能enable_ramdisk。
{
"product_name": "khdvk_3566b",
"device_company": "kaihong",
"device_build_path": "device/board/kaihong/build",
"target_cpu": "arm",
"type": "standard",
"version": "3.0",
"board": "khdvk_3566b",
"enable_ramdisk": true,//是否支持ramdisk二级启动
"build_selinux": true,// 是否支持selinux权限管理
2.把主线编译出来的ramdsik.img 打包到boot.img
配置:
由于rk 启动uboot 支持从ramdisk 启动,只需要在打包boot_linux.img 的配置文件中增加ramdisk.img,因此没有使用主线的its格式,具体配置就是在内核编译脚本make-ohos.sh中增加:
function make_extlinux_conf()
{
dtb_path=$1
uart=$2
image=$3
echo "label rockchip-kernel-5.10" > ${EXTLINUX_CONF}
echo " kernel /extlinux/${image}" >> ${EXTLINUX_CONF}
echo " fdt /extlinux/${TOYBRICK_DTB}" >> ${EXTLINUX_CONF}
if [ "enable_ramdisk" == "${ramdisk_flag}" ]; then
echo " initrd /extlinux/ramdisk.img" >> ${EXTLINUX_CONF}
fi
cmdline="append earlycon=uart8250,mmio32,${uart} root=PARTUUID=614e0000-0000-4b53-8000-1d28000054a9 rw rootwait rootfstype=ext4"
echo " ${cmdline}" >> ${EXTLINUX_CONF}
}
打包
增加了打包boot镜像的脚本make-boot.sh,供编译完ramdisk,打包boot 镜像时调用,主要内容:
genext2fs -B ${blocks} -b ${block_size} -d boot_linux -i 8192 -U boot_linux.img
调用make-boot.sh的修改可以参考如下pr:
https://gitee.com/openharmony/build/pulls/569/files
INIT配置
init相关配置请参考 启动子系统的规范要求 即可
音频
khdvk_3566b Audio硬件结构图
khdvk_3566b平台Audio驱动框架图
- HDI adapter
实现Audio HAL层驱动(HDI接口适配),给Audio服务(frameworks)提供所需的音频硬件驱动能力接口。包含 Audio Manager、Audio Adapter、Audio Control、Audio Capture、Audio Render等接口对象。
- Audio Interface Lib
配合内核中的Audio Driver Model使用,实现音频硬件的控制、录音数据的读取、播放数据的写入。它里面包括Stream_ctrl_common 通用层,主要是为了和上层的audio HDI adapter层进行对接。
- ADM(Audio Driver Model)
音频驱动框架模型,向上服务于多媒体音频子系统,便于系统开发者能够更便捷的根据场景来开发应用。向下服务于具体的设备厂商,对于Codec和DSP设备厂商来说,可根据ADM模块提供的向下统一接口适配各自的驱动代码,就可以实现快速开发和适配OpenHarmony系统。
- Audio Control Dispatch
接收lib层的控制指令并将控制指令分发到驱动层。
- Audio Stream Dispatch
接收lib层的数据并将数据分发到驱动层
- Card Manager
多声卡管理模块,每个声卡含有Dai、Platform、Codec、Accessory、Dsp、SAPM模块。
- Platform Drivers
驱动适配层。
- SAPM(Smart Audio Power Manager)
电源管理模块,对整个ADM电源进行功耗策略优化。
Audio 驱动开发
这里以khdvk_3566b为例,讲述Audio驱动开发,其涉及到的模块驱动主要有:Codec驱动、platform驱动、Dai驱动。
相关代码路径如下:
device/board/kaihong/khdvk_3566b/audio_drivers/codec/rk809_codec/
device/board/kaihong/khdvk_3566b/audio_drivers/codec/dai/
device/board/kaihong/khdvk_3566b/audio_drivers/codec/soc/
HDF HCS配置路径如下:
vendor/kaihong/khdvk_3566b/hdf_config/khdf/device_info/
vendor/kaihong/khdvk_3566b/hdf_config/khdf/audio/
Audio 驱动开发流程:
step1:配置各个模块的HCS
step2:修改各个模块的编译文件
step3:配置各个模块的函数操作集
step4:进行功能调试
Audio驱动开发实例
codec驱动开发实例
代码路径:
device/board/kaihong/khdvk_3566b/audio_drivers/codec/rk809_codec/
-
将codec注册绑定到HDF框架中,moduleName与device_info.hcs中的moduleName匹配
struct HdfDriverEntry g_Rk809DriverEntry = {
.moduleVersion = 1,
.moduleName = "CODEC_RK809",
.Bind = Rk809DriverBind,
.Init = Rk809DriverInit,
.Release = RK809DriverRelease,
};HDF_INIT(g_Rk809DriverEntry);
-
Codec模块需要填充下面三个结构体:
g_codecData:codec设备的操作函数集和私有数据集。
g_codecDaiDeviceOps:codecDai的操作函数集,包括启动传输和参数配置等函数接口。
g_codecDaiData:codec的数字音频接口的操作函数集和私有数据集。
struct CodecData g_rk809Data = {
.Init = Rk809DeviceInit,
.Read = RK809CodecReadReg,
.Write = Rk809CodecWriteReg,
};
struct AudioDaiOps g_rk809DaiDeviceOps = {
.Startup = Rk809DaiStartup,
.HwParams = Rk809DaiHwParams,
.Trigger = Rk809NormalTrigger,
};
struct DaiData g_rk809DaiData = {
.DaiInit = Rk809DaiDeviceInit,
.ops = &g_rk809DaiDeviceOps,
};
1> CodecData结构体操作函数的实现
int32_t Rk809DeviceInit(struct AudioCard *audioCard, const struct CodecDevice *device)
{
......
//get和set功能注册
if (CodecSetCtlFunc(device->devData, RK809GetCtrlOps, RK809SetCtrlOps) != HDF_SUCCESS) {
AUDIO_DRIVER_LOG_ERR("AudioCodecSetCtlFunc failed.");
return HDF_FAILURE;
}
//codec默认寄存器的初始化
ret = RK809RegDefaultInit(device->devData->regCfgGroup);
......
if (AudioAddControls(audioCard, device->devData->controls, device->devData->numControls) != HDF_SUCCESS) {
AUDIO_DRIVER_LOG_ERR("add controls failed.");
return HDF_FAILURE;
}
......
}
/*读寄存器接口*/
int32_t RK809CodecReadReg(const struct CodecDevice *codec, uint32_t reg, uint32_t *val)
{
......
if (Rk809DeviceRegRead(reg, val)) {
AUDIO_DRIVER_LOG_ERR("read register fail: [%04x]", reg);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
/*写寄存器接口*/
int32_t Rk809CodecWriteReg(const struct CodecDevice *codec, uint32_t reg, uint32_t value)
{
if (Rk809DeviceRegWrite(reg, value)) {
AUDIO_DRIVER_LOG_ERR("write register fail: [%04x] = %04x", reg, value);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
2> g_rk809DaiDeviceOps结构体的具体实现
/*Rk809DaiStartup为启动时的一些设置*/
int32_t Rk809DaiStartup(const struct AudioCard *card, const struct DaiDevice *device)
{
......
ret = RK809WorkStatusEnable(device->devData->regCfgGroup);
......
}
/*Rk809DaiHwParams为参数配置,包括采样率、位宽等。*/
int32_t Rk809DaiHwParams(const struct AudioCard *card, const struct AudioPcmHwParams *param)
{
......
ret = AudioFormatToBitWidth(param->format, &bitWidth);
codecDaiParamsVal.frequencyVal = param->rate;
codecDaiParamsVal.DataWidthVal = bitWidth;
ret = RK809DaiParamsUpdate(card->rtd->codecDai->devData->regCfgGroup, codecDaiParamsVal);
......
}
/*PCM流控制寄存器相关配置*/
int32_t Rk809NormalTrigger(const struct AudioCard *card, int cmd, const struct DaiDevice *device)
{
g_cuurentcmd = cmd;
switch (cmd) {
case AUDIO_DRV_PCM_IOCTL_RENDER_START:
case AUDIO_DRV_PCM_IOCTL_RENDER_RESUME:
RK809DeviceRegConfig(rk817_render_start_regmap_config);
break;
case AUDIO_DRV_PCM_IOCTL_RENDER_STOP:
case AUDIO_DRV_PCM_IOCTL_RENDER_PAUSE:
RK809DeviceRegConfig(rk817_render_stop_regmap_config);
break;
case AUDIO_DRV_PCM_IOCTL_CAPTURE_START:
case AUDIO_DRV_PCM_IOCTL_CAPTURE_RESUME:
RK809DeviceRegConfig(rk817_capture_start_regmap_config);
break;
case AUDIO_DRV_PCM_IOCTL_CAPTURE_STOP:
case AUDIO_DRV_PCM_IOCTL_CAPTURE_PAUSE:
RK809DeviceRegConfig(rk817_capture_stop_regmap_config);
break;
default:
break;
}
return HDF_SUCCESS;
}
- 完成 bind、init和release函数的实现
HdfDriverEntry结构体的具体填充:
/*获取codec service,以及注册codec*/
static int32_t Rk809DriverInit(struct HdfDeviceObject *device)
{
......
CodecGetConfigInfo(device, &(g_chip->codec))
CodecSetConfigInfo(&(g_chip->codec), &(g_chip->dai)
GetServiceName(device)
CodecGetDaiName(device, &(g_chip->dai.drvDaiName)
OsalMutexInit(&g_rk809Data.mutex);
AudioRegisterCodec(device, &(g_chip->codec), &(g_chip->dai)
......
}
/*将codec service绑定到HDF*/
static int32_t Rk809DriverBind(struct HdfDeviceObject *device)
{
struct CodecHost *codecHost;
......
codecHost = (struct CodecHost *)OsalMemCalloc(sizeof(*codecHost));
......
codecHost->device = device;
device->service = &codecHost->service;
return HDF_SUCCESS;
}
/*释放资源*/
static void RK809DriverRelease(struct HdfDeviceObject *device)
{
struct CodecHost *codecHost;
......
codecHost = (struct CodecHost *)device->service;
if (codecHost == NULL) {
HDF_LOGE("CodecDriverRelease: codecHost is NULL");
return;
}
OsalMemFree(codecHost);
}
-
配置codec hcs文件
1> vendor/kaihong/khdvk_3566b/hdf_config/khdf/device_info/device_info.hcs
相关配置如下:
device_codec :: device {
device0 :: deviceNode {
policy = 1;
priority = 50;
preload = 0;
permission = 0666;
moduleName = "CODEC_RK809";
serviceName = "codec_service_0";
deviceMatchAttr = "hdf_codec_driver";
}
}
2> vendor/kaihong/khdvk_3566b/hdf_config/khdf/audio/codec_config.hcs
该文件涉及音量、静音模式、mic、通道模式等相关寄存器配置
DAI驱动开发实例
代码路径:
device/board/kaihong/khdvk_3566b/audio_drivers/codec/dai/
-
将I2S驱动注册绑定到HDF框架中,代码片段如下,启动moduleName与HCS文件的中moduleName一致
struct HdfDriverEntry g_daiDriverEntry = {
.moduleVersion = 1,
.moduleName = "DAI_RK3568",
.Bind = DaiDriverBind,
.Init = DaiDriverInit,
.Release = DaiDriverRelease, -
DAI模块需要填充下面两个结构体
g_daiData:dai设备私有配置,其中包含dai设备的初始化、读写寄存器、操作函数。
g_daiDeviceOps:dai设备操作函数集,包含了dai的参数设置、触发、启动。
struct AudioDaiOps g_daiDeviceOps = {
.Startup = Rk3568DaiStartup,
.HwParams = Rk3568DaiHwParams,
.Trigger = Rk3568NormalTrigger,
};
struct DaiData g_daiData = {
.Read = Rk3568DeviceReadReg,
.Write = Rk3568DeviceWriteReg,
.DaiInit = Rk3568DaiDeviceInit,
.ops = &g_daiDeviceOps,
};
1> AudioDaiOps结构体的具体填充
/*Rk3568DaiHwParams中主要完成一些pcm流信息的设置*/
int32_t Rk3568DaiHwParams(const struct AudioCard *card, const struct AudioPcmHwParams *param)
{
......
data->pcmInfo.channels = param->channels;
if (AudioFormatToBitWidth(param->format, &bitWidth) != HDF_SUCCESS) {
AUDIO_DEVICE_LOG_ERR("AudioFormatToBitWidth error");
return HDF_FAILURE;
}
data->pcmInfo.bitWidth = bitWidth;
data->pcmInfo.rate = param->rate;
data->pcmInfo.streamType = param->streamType;
i2sTdm = dev_get_drvdata(&platformdev->dev);
ret = RK3568I2sTdmSetSysClk(i2sTdm, param);
if (ret != HDF_SUCCESS) {
AUDIO_DEVICE_LOG_ERR("RK3568I2sTdmSetSysClk error");
return HDF_FAILURE;
}
ret = RK3568I2sTdmSetMclk(i2sTdm, &mclk, param);
if (ret != HDF_SUCCESS) {
AUDIO_DEVICE_LOG_ERR("RK3568I2sTdmSetMclk error");
return HDF_FAILURE;
}
AUDIO_DEVICE_LOG_DEBUG("success");
return HDF_SUCCESS;
}
int32_t Rk3568NormalTrigger(const struct AudioCard *card, int cmd, const struct DaiDevice *device)
{
......
Rk3568TxAndRxSetReg(i2sTdm, streamType, triggerFlag);
......
}
2> DaiData结构体的具体填充
/*封装linux内核的读寄存器接口*/
int32_t Rk3568DeviceReadReg(const struct DaiDevice *dai, uint32_t reg, uint32_t *val)
{
......
if (regmap_read(i2sTdm->regmap, reg, val)) {
......
}
/*封装linux内核的写寄存器接口*/
int32_t Rk3568DeviceWriteReg(const struct DaiDevice *dai, uint32_t reg, uint32_t value)
{
......
if (regmap_write(i2sTdm->regmap, reg, value)) {
......
}
/*dai 设备的初始化*/
int32_t Rk3568DaiDeviceInit(struct AudioCard *card, const struct DaiDevice *dai)
- 完成 bind、init和release函数的实现
HdfDriverEntry结构体中的bind、init、release具体填充:
static int32_t DaiDriverInit(struct HdfDeviceObject *device)
{
......
DaiGetConfigInfo(device, &g_daiData)
DaiGetServiceName(device)
AudioSocRegisterDai(device, (void *)&g_daiData);
......
}
static int32_t DaiDriverBind(struct HdfDeviceObject *device)
{
......
daiHost->device = device;
device->service = &daiHost->service;
g_daiData.daiInitFlag = false;
......
}
static void DaiDriverRelease(struct HdfDeviceObject *device)
{
......
OsalMutexDestroy(&g_daiData.mutex);
daiHost = (struct DaiHost *)device->service;
OsalMemFree(daiHost);
......
}
4.配置dai hcs文件
1> vendor/kaihong/khdvk_3566b/hdf_config/khdf/device_info/device_info.hcs
device_dai0 :: device {
device0 :: deviceNode {
policy = 1;
priority = 50;
preload = 0;
permission = 0666;
moduleName = "DAI_RK3568";
serviceName = "dai_service";
deviceMatchAttr = "hdf_dai_driver";
}
}
2> vendor/kaihong/khdvk_3566b/hdf_config/khdf/audio/dai_config.hcs
该文件涉及I2S时序、配置参数以及rk809使能等相关寄存器配置
Platform驱动开发实例
-
将DMA驱动注册到HDF框架中,代码片段如下,启动moduleName与HCS文件的中moduleName一致
struct HdfDriverEntry g_platformDriverEntry = {
.moduleVersion = 1,
.moduleName = "DMA_RK3568",
.Bind = PlatformDriverBind,
.Init = PlatformDriverInit,
.Release = PlatformDriverRelease,
}; HDF_INIT(g_platformDriverEntry); -
DMA模块需要填充下面两个结构体
struct AudioDmaOps g_dmaDeviceOps = {
.DmaBufAlloc = Rk3568DmaBufAlloc, //dma内存申请函数接口
.DmaBufFree = Rk3568DmaBufFree, // dma内存释放函数接口
.DmaRequestChannel = Rk3568DmaRequestChannel, // dma申请通道函数接口
.DmaConfigChannel = Rk3568DmaConfigChannel, // dma通道配置函数接口
.DmaPrep = Rk3568DmaPrep, // dma准备函数接口
.DmaSubmit = Rk3568DmaSubmit, // dma submit函数接口
.DmaPending = Rk3568DmaPending, // dma pending函数接口
.DmaPause = Rk3568DmaPause, // dma暂停、停止函数接口
.DmaResume = Rk3568DmaResume, // dma恢复函数接口
.DmaPointer = Rk3568PcmPointer, // dma获取当前播放或录音位置函数接口
};
struct PlatformData g_platformData = {
.PlatformInit = AudioDmaDeviceInit, // dma设备初始化接口
.ops = &g_dmaDeviceOps,
};
- 完成 bind、init和release函数的实现
HdfDriverEntry结构体中的bind、init、release具体填充:
static int32_t PlatformDriverInit(struct HdfDeviceObject *device)
{
......
PlatformGetServiceName(device);
AudioSocRegisterPlatform(device, &g_platformData)
......
}
static int32_t PlatformDriverBind(struct HdfDeviceObject *device)
{
......
platformHost->device = device;
device->service = &platformHost->service;
......
}
static void PlatformDriverRelease(struct HdfDeviceObject *device)
{
......
platformHost = (struct PlatformHost *)device->service;
OsalMemFree(platformHost);
......
}
- 配置dma hcs文件
1> vendor/kaihong/khdvk_3566b/hdf_config/khdf/device_info/device_info.hcs
相关配置如下:
device_dma :: device {
device0 :: deviceNode {
policy = 1;
priority = 50;
preload = 0;
permission = 0666;
moduleName = "DMA_RK3568";
serviceName = "dma_service_0";
deviceMatchAttr = "hdf_dma_driver";
}
}
2> vendor/kaihong/khdvk_3566b/hdf_config/khdf/audio/dma_config.hcs
没有特殊参数需要配置,一般情况下不需改动。
Makefile和Kconfig配置文件
文件路径:
drivers/adapter/khdf/linux/model/audio
Makefile文件相关内容:
obj-$(CONFIG_DRIVERS_HDF_AUDIO_RK3566) += \
$(KHDF_AUDIO_RK3566_DIR)/codec/rk809_codec/src/rk809_codec_adapter.o \
$(KHDF_AUDIO_RK3566_DIR)/codec/rk809_codec/src/rk809_codec_impl.o \
$(KHDF_AUDIO_RK3566_DIR)/codec/rk809_codec/src/rk809_codec_linux_driver.o \
$(KHDF_AUDIO_RK3566_DIR)/dsp/src/rk3568_dsp_adapter.o \
$(KHDF_AUDIO_RK3566_DIR)/dsp/src/rk3568_dsp_ops.o \
$(KHDF_AUDIO_RK3566_DIR)/dai/src/rk3568_dai_adapter.o \
$(KHDF_AUDIO_RK3566_DIR)/dai/src/rk3568_dai_ops.o \
$(KHDF_AUDIO_RK3566_DIR)/dai/src/rk3568_dai_linux_driver.o \
$(KHDF_AUDIO_RK3566_DIR)/soc/src/rk3568_dma_adapter.o \
$(KHDF_AUDIO_RK3566_DIR)/soc/src/rk3568_dma_ops.o
Kconfig相关内容:
config DRIVERS_HDF_AUDIO_RK3566
bool "Enable HDF Audio Codec driver"
default n
depends on DRIVERS_HDF_AUDIO
help
Answer Y to choice HDF Audio Codec driver.
LCD
khdvk_3566b平台默认支持一个mipi接口的lcd屏幕
LCD的适配主要依赖于HDF显示模型,显示驱动模型基于 HDF 驱动框架、Platform 接口及 OSAL 接口开发,可以屏蔽不同内核形态(LiteOS、Linux)差异,适用于不同芯片平台,为显示屏器件提供统一的驱动平台。
如图为 HDF Display驱动模型层次关系
当前驱动模型主要部署在内核态中,向上对接到 Display 公共 hal 层,辅助 HDI 的实现。显示驱动通过 Display-HDI 层对图形服务暴露显示屏驱动能力;向下对接显示屏 panel 器件,驱动屏幕正常工作,自上而下打通显示全流程通路。
所以LCD的适配主要在于LCD panel器件驱动的适配
器件驱动的适配分为2部分:panel驱动和hcs配置
涉及的文件有:
drivers/framework/model/display/driver/panel
vendor/kaihong/khdvk_3566b/hdf_config/khdf/device_info
vendor/kaihong/khdvk_3566b/hdf_config/khdf/input
panel驱动
器件驱动主要围绕如下接口展开:
struct PanelData {
struct HdfDeviceObject *object;
int32_t (*init)(struct PanelData *panel);
int32_t (*on)(struct PanelData *panel);
int32_t (*off)(struct PanelData *panel);
int32_t (*prepare)(struct PanelData *panel);
int32_t (*unprepare)(struct PanelData *panel);
struct PanelInfo *info;
enum PowerStatus powerStatus;
struct PanelEsd *esd;
struct BacklightDev *blDev;
void *priv;
};
驱动中在初始化接口中实例化该结构体:
panelSimpleDev->panel.init = PanelSimpleInit;
panelSimpleDev->panel.on = PanelSimpleOn;
panelSimpleDev->panel.off = PanelSimpleOff;
panelSimpleDev->panel.prepare = PanelSimplePrepare;
panelSimpleDev->panel.unprepare = PanelSimpleUnprepare;
static void PanelResInit(struct panel_jdi_gt911_dev *panel_dev)
{
......
panel_dev->panel.info = &g_panelInfo;
panel_dev->panel.init = PanelInit;
panel_dev->panel.on = PanelOn;
panel_dev->panel.off = PanelOff;
panel_dev->panel.prepare = PanelPrepare;
panel_dev->panel.unprepare = PanelUnprepare;
......
}
g_panelInfo配置panel基础参数
PanelInit负责panel的软件初始化
PanelOn负责亮屏
PanelOff负责灭屏
PanelPrepare负责亮屏的硬件时序初始化
PanelUnprepare负责灭屏的硬件时序初始化
实例化后使用RegisterPanel接口向display模型注册该panel驱动即可
需要说明的是,khdvk_3566b上的这款lcd使用的时候DRM显示框架
hcs配置
device3 :: deviceNode {
policy = 0;
priority = 100;
preload = 0;
moduleName = "LCD_MIPI_JDI_GT911";
}
背光
背光控制分为原生linux内核框架下背光驱动以及基于HDF框架开发的背光驱动模型。
rk3566背光是通过pwm控制占空比实现的,具体使用的是pwm4
linux背光驱动代码路径:
linux-5.10/drivers/video/backlight/pwm_bl.c
linux-5.10/drivers/video/backlight/backlight.c
linux-5.10/drivers/pwm/pwm-rockchip.c
使用HDF框架下的背光驱动,需要关闭原生驱动
# CONFIG_BACKLIGHT_PWM is not set
HDF实现
基于HDF框架开发的背光驱动模型,如下图:
代码路径:
drivers/framework/model/display/driver/backlight/hdf_bl.c
HDF BL入口函数:
static int32_t BacklightInit(struct HdfDeviceObject *object)
{
if (object == NULL) {
HDF_LOGE("%s: object is null!", __func__);
return HDF_FAILURE;
}
HDF_LOGI("%s success", __func__);
return HDF_SUCCESS;
}
struct HdfDriverEntry g_blDevEntry = {
.moduleVersion = 1,
.moduleName = "HDF_BL",
.Init = BacklightInit,
.Bind = BacklightBind,
};
HDF_INIT(g_blDevEntry);
代码路径:
drivers/framework/model/display/driver/backlight/pwm_bl.c
HDF PWM入口函数:
struct HdfDriverEntry g_pwmBlDevEntry = {
.moduleVersion = 1,
.moduleName = "PWM_BL",
.Init = BlPwmEntryInit,
};
HDF_INIT(g_pwmBlDevEntry);
具体控制背光的接口:
static int32_t BlPwmUpdateBrightness(struct BacklightDev *blDev, uint32_t brightness)
{
int32_t ret;
uint32_t duty;
struct BlPwmDev *blPwmDev = NULL;
blPwmDev = ToBlDevPriv(blDev);
if (blPwmDev == NULL) {
HDF_LOGE("%s blPwmDev is null", __func__);
return HDF_FAILURE;
}
if (blPwmDev->props.maxBrightness == 0) {
HDF_LOGE("%s maxBrightness is 0", __func__);
return HDF_FAILURE;
}
if (brightness == 0) {
return PwmDisable(blPwmDev->pwmHandle);
}
duty = (brightness * blPwmDev->config.period) / blPwmDev->props.maxBrightness;
ret = PwmSetDuty(blPwmDev->pwmHandle, duty);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%s: PwmSetDuty failed, ret %d", __func__, ret);
return HDF_FAILURE;
}
return PwmEnable(blPwmDev->pwmHandle);
}
static struct BacklightOps g_blDevOps = {
.updateBrightness = BlPwmUpdateBrightness,
};
HDF PWM实现的调用的就是内核pwm的接口。
代码路径:
drivers/framework/model/display/driver/panel/mipi_jdi_gt911.c
在LCD HDF器件驱动注册背光:
panel_dev->panel.blDev = GetBacklightDev("hdf_pwm");
if (panel_dev->panel.blDev == NULL) {
HDF_LOGE("%s GetBacklightDev fail", __func__);
goto FAIL;
}
HCS配置
驱动hcs配置:
device_pwm_bl :: device {
device0 :: deviceNode {
policy = 0;
priority = 95;
preload = 0;
moduleName = "PWM_BL";
deviceMatchAttr = "pwm_bl_dev";
}
}
device_backlight :: device {
device0 :: deviceNode {
policy = 2;
priority = 90;
preload = 0;
permission = 0660;
moduleName = "HDF_BL";
serviceName = "hdf_bl";
}
}
pwm背光的hcs配置:
root {
backlightConfig {
pwmBacklightConfig {
match_attr = "pwm_bl_dev";
pwmDevNum = 1;
pwmMaxPeroid = 25000;
backlightDevName = "hdf_pwm";
minBrightness = 0;
defBrightness = 127;
maxBrightness = 255;
}
}
}
测试
cat /sys/kernel/debug/pwm 来查看hdf pwm是否申请到pwm4
申请成功有如下结果:
requested 代表申请成功
enabled 代表pwm4使能成功
# cat /sys/kernel/debug/pwm
platform/fe6e0000.pwm, 1 PWM device
pwm-0 (backlight ): requested period: 25000 ns duty: 0 ns polarity: normal
显示适配
显示适配需要完成的工作:图形服务HDI接口适配、GPU适配、mipi dsi驱动适配
显示HDI
显示HDI 对图形服务提供显示驱动能力,包括显示图层的管理、显示内存的管理及硬件加速等。 显示HDI需要适配两部分:gralloc 和 display_device。
OpenHarmony提供了使用与Hi3516DV300参考实现,厂商可根据实际情况参考适配,khdvk_3566b display适配是在//device/soc/rockchip/hardware/display目录下,仓名为 device_soc_rockchip 。
display gralloc适配
gralloc模块提供显示内存管理功能,该实现基于drm开发。
drm设备节点定义在//device/soc/rockchip/hardware/display/src/display_gralloc/display_gralloc_gbm.c文件中,根据khdvk_3566b实际情况修改了drm文件节点。
const char *g_drmFileNode = "/dev/dri/renderD128";
display device适配
display device模块提供显示设备管理、layer管理、硬件加速等功能。
-
display drm设备节点初始化,根据khdvk_3566b实际情况修改了drm设备名称。
//device/soc/rockchip/hardware/display/src/display_device/drm/drm_device.cpp
std::shared_ptr<HdiDeviceInterface> DrmDevice::Create()
{
DISPLAY_DEBUGLOG();
if (mDrmFd == nullptr) {
const std::string name("rockchip"); // 将drm驱动设备名称修改为"rockchip"
int drmFd = open("/dev/dri/card0", O_RDWR | O_CLOEXEC); // 将drm驱动设备文件句柄修改为"/dev/dri/card0"
if (drmFd < 0) {
DISPLAY_LOGE("drm file:%{public}s open failed %{public}s", name.c_str(), strerror(errno));
return nullptr;
}
DISPLAY_DEBUGLOG("the drm fd is %{public}d", drmFd);
mDrmFd = std::make_shared<HdiFd>(drmFd);
}
if (mInstance == nullptr) {
mInstance = std::make_shared<DrmDevice>();
}
return mInstance;
} -
display硬件合成的修改
//device/soc/rockchip/hardware/display/src/display_gfx/display_gfx.c
硬件合成文件添加了颜色空间的支持模式
RgaSURF_FORMAT colorSpaceModeChange(PixelFormat color, uint8_t *isYuv)
{
RgaSURF_FORMAT rkFormat;
switch (color) {
case PIXEL_FMT_RGB_565: /**< RGB565 format */
rkFormat = RK_FORMAT_RGB_565;
*isYuv = 0;
break;
case PIXEL_FMT_RGBA_4444: /**< RGBA4444 format */
rkFormat = RK_FORMAT_RGBA_4444;
*isYuv = 0;
break;
case PIXEL_FMT_RGBA_5551: /**< RGBA5551 format */
rkFormat = RK_FORMAT_RGBA_5551;
*isYuv = 0;
break;
case PIXEL_FMT_RGBX_8888: /**< RGBX8888 format */
rkFormat = RK_FORMAT_RGBX_8888;
*isYuv = 0;
break;
case PIXEL_FMT_RGBA_8888: /**< RGBA8888 format */
rkFormat = RK_FORMAT_RGBA_8888;
*isYuv = 0;
break;
case PIXEL_FMT_RGB_888: /**< RGB888 format */
rkFormat = RK_FORMAT_RGB_888;
*isYuv = 0;
break;
case PIXEL_FMT_BGR_565: /**< BGR565 format */
rkFormat = RK_FORMAT_BGR_565;
*isYuv = 0;
break;
case PIXEL_FMT_BGRA_4444: /**< BGRA4444 format */
rkFormat = RK_FORMAT_BGRA_4444;
*isYuv = 0;
break;
case PIXEL_FMT_BGRA_5551: /**< BGRA5551 format */
rkFormat = RK_FORMAT_BGRA_5551;
*isYuv = 0;
break;
case PIXEL_FMT_BGRX_8888: /**< BGRX8888 format */
rkFormat = RK_FORMAT_BGRX_8888;
*isYuv = 0;
break;
case PIXEL_FMT_BGRA_8888: /**< BGRA8888 format */
rkFormat = RK_FORMAT_BGRA_8888;
*isYuv = 0;
break;
case PIXEL_FMT_YCBCR_422_SP: /**< YCBCR422 semi-planar format */
rkFormat = RK_FORMAT_YCbCr_420_SP;
*isYuv = 1;
break;
case PIXEL_FMT_YCRCB_422_SP: /**< YCRCB422 semi-planar format */
rkFormat = RK_FORMAT_YCrCb_422_SP;
*isYuv = 1;
break;
case PIXEL_FMT_YCBCR_420_SP: /**< YCBCR420 semi-planar format */
rkFormat = RK_FORMAT_YCbCr_420_SP;
*isYuv = 1;
break;
case PIXEL_FMT_YCRCB_420_SP: /**< YCRCB420 semi-planar format */
rkFormat = RK_FORMAT_YCrCb_420_SP;
*isYuv = 1;
break;
case PIXEL_FMT_YCBCR_422_P: /**< YCBCR422 planar format */
rkFormat = RK_FORMAT_YCbCr_422_P;
*isYuv = 1;
break;
case PIXEL_FMT_YCRCB_422_P: /**< YCRCB422 planar format */
rkFormat = RK_FORMAT_YCrCb_422_P;
*isYuv = 1;
break;
case PIXEL_FMT_YCBCR_420_P: /**< YCBCR420 planar format */
rkFormat = RK_FORMAT_YCbCr_420_P;
*isYuv = 1;
break;
case PIXEL_FMT_YCRCB_420_P: /**< YCRCB420 planar format */
rkFormat = RK_FORMAT_YCrCb_420_P;
*isYuv = 1;
break;
case PIXEL_FMT_YUYV_422_PKG: /**< YUYV422 packed format */
rkFormat = RK_FORMAT_YUYV_422;
*isYuv = 1;
break;
case PIXEL_FMT_UYVY_422_PKG: /**< UYVY422 packed format */
rkFormat = RK_FORMAT_UYVY_422;
*isYuv = 1;
break;
case PIXEL_FMT_YVYU_422_PKG: /**< YVYU422 packed format */
rkFormat = RK_FORMAT_YUYV_422;
*isYuv = 1;
break;
case PIXEL_FMT_VYUY_422_PKG: /**< VYUY422 packed format */
rkFormat = RK_FORMAT_VYUY_422;
*isYuv = 1;
break;
default:
rkFormat = RK_FORMAT_UNKNOWN;
break;
}
return rkFormat;
}
在合成时增加了旋转90、180、270度
int32_t TransformTypeChange(TransformType type)
{
int32_t rkRotateType;
switch (type) {
case ROTATE_90: /**< Rotation by 90 degrees */
rkRotateType = IM_HAL_TRANSFORM_ROT_90;
break;
case ROTATE_180: /**< Rotation by 180 degrees */
rkRotateType = IM_HAL_TRANSFORM_ROT_180;
break;
case ROTATE_270: /**< Rotation by 270 degrees */
rkRotateType = IM_HAL_TRANSFORM_ROT_270;
break;
default:
rkRotateType = 0; /**< No rotation */
break;
}
return rkRotateType;
}
测试验证
hello_composer 测试模块:Rosen图形框架提供的测试程序,主要显示流程,HDI接口等功能是否正常,默认随系统编译。
代码路径:
foundation/graphic/graphic_2d/rosen/samples/composer/
├── BUILD.gn
├── hello_composer.cpp
├── hello_composer.h
├── layer_context.cpp
├── layer_context.h
└── main.cpp
具体验证如下:
-
关闭render service
service_control stop render_service
-
关闭 fondation进程
service_control stop fondation
-
运行hello_composer测试相关接口
切换到/system/bin目录下,运行hello_composer测试命令#cd /system/bin #./hello_composer rga_api version 1.3.0_[1] (df26244 build: 2021-09-01 11:23:31 base: )
查看mipi显示屏幕上的变化
https://gitee.com/openharmony/drivers_peripheral/tree/master/display/test/unittest/standard单元测试:HDI显示模块提供的测试模块,主要测试HDI接口、显示buffer、驱动等能力,测试时也需要关闭render service和fondation进程。
代码路径:/drivers/peripheral/display/test/unittest/standard
├── BUILD.gn
├── common
│ ├── display_test.h
│ ├── display_test_utils.cpp
│ └── display_test_utils.h
├── display_device
│ ├── hdi_composition_check.cpp
│ ├── hdi_composition_check.h
│ ├── hdi_device_test.cpp
│ ├── hdi_device_test.h
│ ├── hdi_test_device_common.h
│ ├── hdi_test_device.cpp
│ ├── hdi_test_device.h
│ ├── hdi_test_display.cpp
│ ├── hdi_test_display.h
│ ├── hdi_test_layer.cpp
│ ├── hdi_test_layer.h
│ ├── hdi_test_render_utils.cpp
│ └── hdi_test_render_utils.h
│── display_gfx
│ │── display_gfx_test.cpp
│ │── display_gfx_test.h
│ │── soft_blit.cpp
│ │── soft_blit.h
└── display_gralloc
├── display_gralloc_test.cpp
└── display_gralloc_test.h
具体验证如下:
-
添加编译模块
修改drivers/peripheral/display/test/BUILD.gngroup("hdf_test_display") {
testonly = true
deps = [
"fuzztest:hdf_display_fuzztest",
"unittest/standard:hdf_unittest_display", //添加display单元测试
]
} -
添加缺失的文件包含
修改drivers/peripheral/display/test/unittest/standard/BUILD.gn
在第63行处,添加包含目录//device/soc/rockchip/hardware/display/src/display_gralloc,如果不修改此处有可能编译报错。ohos_unittest("gralloctest") {
module_out_path = module_output_path
sources = [ "display_gralloc/display_gralloc_test.cpp" ]
deps = [
"//drivers/peripheral/display/hal:hdi_display_gralloc",
"//third_party/googletest:gtest_main",
]
include_dirs = [
"common",
"//drivers/peripheral/display/hal/default_standard/include",
"//drivers/peripheral/display/hal/default_standard/src/display_gralloc",
"//device/soc/rockchip/hardware/display/src/display_gralloc", //添加这行,将display_gralloc包含进编译
"//drivers/peripheral/display/interfaces/include",
"//drivers/peripheral/base",
"//drivers/peripheral/display/interfaces/include",
"//foundation/graphic/standard/utils/include",
]
external_deps = [
"device_driver_framework:libhdf_utils",
"utils_base:utils",
]
} -
编译命令
编译hdf_test_display的命令如下:./build.sh --product-name khdvk_3566b --build-target hdf_test_display
-
编译结果
编译结果路径在out/khdvk_3566b/tests/unittest/hdf/display目录下,该目录下有三个可执行文件devicetest、gfxtest、gralloctest,可将这三文件通过hdc发送到khdvk_3566b开发板上运行测试。
-
运行测试
通过hdc下载到开发板/system/bin/目录下,并修改测试程序的可执行属性,在终端下输入如下命令
hdc_std.exe file send D:\hdc\devicetest /system/bin/
hdc_std.exe file send D:\hdc\gfxtest /system/bin/
hdc_std.exe file send D:\hdc\gralloctest /system/bin/
进入hdc命令hdc_std.exe shell后
先关闭render service和foundation:
service_control stop render_service
service_control stop fondation
再分别执行命令,查看mipi屏显示结果:
cd /system/bin/
执行devicetest
chmod -R 777 devicetest
devicetest
执行gfxtest
chmod -R 777 gfxtest
gfxtest
执行gralloctest
chmod -R 777 gralloctest
gralloctest
GPU
GPU图形处理器, khdvk_3566b GPU适配是在//device/soc/rockchip/hardware/gpu目录下,目前采用的是rockchip提供闭源的bifrost gpu方案。
目录结构:
├── BUILD.gn
├── lib64
│ └── libmali-bifrost-g52-g2p0-ohos.so
├── lib
│ └── libmali-bifrost-g52-g2p0-ohos.so
└── include
└── gbm.h
gpu编译的内容,我们来看下BUILD.gn的内容,其中我们预编译了libmali-bifrost-g52-g2p0-ohos.so动态库,khdvk_3566b是arm64位的,所以编译了lib64目录下的libmali-bifrost-g52-g2p0-ohos.so动态库。其中gup模块符号链接libEGL.so、libGLESv1.so、libGLESv2.so、libGLESv3.so、libmali.so.0、libmali.so.1动态库的符号。
import("//build/ohos.gni")
import("//build/ohos/ndk/ndk.gni")
config("libmali-bifrost-g52-g2p0-ohos") {
include_dirs = [ "include" ]
cflags = [
"-Wno-incompatible-pointer-types",
"-Werror",
"-Wimplicit-function-declaration",
"-Wno-error=unused-variable",
]
cflags = []
}
ohos_prebuilt_shared_library("mali-bifrost-g52-g2p0-ohos") {
if (target_cpu == "arm") {
source = "lib/libmali-bifrost-g52-g2p0-ohos.so"
} else if (target_cpu == "arm64") {
source = "lib64/libmali-bifrost-g52-g2p0-ohos.so"
}
# decoupling system.img and vendor.img
install_images = [ chipset_base_dir ]
relative_install_dir = "chipsetsdk"
subsystem_name = "rockchip_products"
part_name = "rockchip_products"
install_enable = true
symlink_target_name = [
"libEGL.so",
"libGLESv1.so",
"libGLESv2.so",
"libGLESv3.so",
"libmali.so.0",
"libmali.so.1",
]
}
TOUCH PANEL
常见的INPUT设备有键盘、鼠标、游戏杆、Touch Screen等。Touch 设备与主机通讯采用标准 I2C 总线,触屏 IC 提供中断支持,提高了触屏数据的实时性。本项目的触摸屏器件IC 为 GT911。
驱动框架模型
INPUT驱动模型
INPUT 驱动模型核心部分由设备管理层、公共驱动层、器件驱动层组成。
(1)设备管理层:为各类输入设备驱动提供input设备的注册、注销接口,同时统一管理 input 设备列表;
(2)平台驱动层:指各类input设备的公共抽象驱动(例如触摸屏的公共驱动),负责对板级硬件进行初始化、硬件中断处理、向manager注册input设备等;
(3)器件驱动层:指各器件厂家的差异化驱动,通过适配平台驱动预留的差异化接口,实现器件驱动开发量最小化。
HDI接口层框架图
INPUT驱动提供给系统服务Input Service可直接调用的驱动能力接口,按照属性分类三类:input设备管理模块、input数据上报模块、input业务控制模块,HDI接口主要包括如下三大类:
- input设备管理模块:管理输入设备,包括输入设备的打开、关闭、设备列表信息获取等;
- input数据上报模块:负责输入事件的上报,包括注册、注销数据上报回调函数等;
- input业务控制模块:提供input设备的业务控制接口,包括获取器件信息及设备类型、设置电源状态等。
HDF驱动适配
HCS配置
配置设备描述信息,在device_info.hcs中添加device_touch_chip:
input :: host {
hostName = "input_host";
priority = 100;
device_input_manager :: device { // Input管理层设备描述信息
device0 :: deviceNode {
policy = 2;
priority = 100;
preload = 0;
permission = 0660;
moduleName = "HDF_INPUT_MANAGER";
serviceName = "hdf_input_host";
deviceMatchAttr = "";
}
}
device_hdf_touch :: device { // Input公共驱动层设备描述信息
device0 :: deviceNode {
policy = 2;
priority = 120;
preload = 0;
permission = 0660;
moduleName = "HDF_TOUCH";
serviceName = "hdf_input_event1";
deviceMatchAttr = "touch_device1";
}
}
device_touch_chip :: device { // Input器件驱动层信息
device0 :: deviceNode {
policy = 0;
priority = 130;
preload = 0;
permission = 0660;
moduleName = "HDF_TOUCH_GT911";
serviceName = "hdf_touch_gt911_service";
deviceMatchAttr = "zsj_gt911_5p5";
}
}
device_hdf_hid :: device {
device0 :: deviceNode {
policy = 2;
priority = 200;
preload = 0;
permission = 0660;
moduleName = "HDF_HID";
}
}
}
配置Touch器件信息,在input_config.hcs中添加器件的特性:
chipConfig {
template touchChip {
match_attr = "";
chipName = "gt911";
vendorName = "zsj";
chipInfo = "AAAA11222";
busType = 0;
deviceAddr = 0x5D;
irqFlag = 2;
maxSpeed = 400;
chipVersion = 0; //parse Coord TypeA
powerSequence {
/* [type, status, dir , delay]
<type> 0:none 1:vcc-1.8v 2:vci-3.3v 3:reset 4:int
<status> 0:off or low 1:on or high 2:no ops
<dir> 0:input 1:output 2:no ops
<delay> meanings delay xms, 20: delay 20ms
*/
powerOnSeq = [4, 0, 1, 5,
3, 0, 1, 10,
3, 1, 1, 60,
4, 2, 0, 50];
suspendSeq = [3, 0, 2, 10];
resumeSeq = [3, 1, 2, 10];
powerOffSeq = [3, 0, 2, 10,
1, 0, 2, 20];
}
}
chip0 :: touchChip {
match_attr = "zsj_gt911_5p5";
chipInfo = "ZIDN45100";
chipVersion = 0;
}
}
适配文件
Touch驱动适配涉及的文件及目录:
1、 编辑 Makefile 文件:./drivers/adapter/khdf/linux/model/input/Makefile
2、 公共配置文件:./vendor/kaihong/khdvk_3566b/hdf_config/khdf/device_info/device_info.hcs
3、 私有配置文件:./vendor/kaihong/khdvk_3566b/hdf_config/khdf/input/input_config.hcs
4、 驱动:drivers\framework\model\input\driver\touchscreen
HDF驱动模型高度抽象集成,TP驱动的适配主要是器件驱动层的适配,首先需要明确TP所需要的软硬件资源。
TP模组需要主机上的如下硬件资源:
1.中断引脚
2.Reset引脚
3.使用的哪一组i2c,从设备的地址是什么
4.TP的初始化固件(通常由IC厂商提供)
5.触摸屏的分辨率
TP模组需要依赖主机上的如下软件资源:
1.Hdf gpio子系统 用于设置gpio pin脚以及一些中断资源
2.Hdf i2c 子系统 用于进行i2c通信
3.Input模型
器件差异化接口适配,示例代码路径:
./drivers/framework/model/input/driver/touchscreen/Touch_gdi_gt911.c
static struct TouchChipOps g_gt911ChipOps = { // 器件IC接口
.Init = ChipInit, // 初始化
.Detect = ChipDetect, // 器件检测
.Resume = ChipResume, // 唤醒
.Suspend = ChipSuspend, // 休眠
.DataHandle = ChipDataHandle, // 器件数据读取
.UpdateFirmware = UpdateFirmware, // 固件升级
.SetAbility = SetAbility, // 配置
};
器件驱动初始化及HDF注册,示例代码路径:
./drivers/framework/model/input/driver/touchscreen/touch_jdi_gt911.c
static int32_t HdfGoodixChipInit(struct HdfDeviceObject *device)
{
...
/* 器件配置结构体内存申请、配置信息解析及挂载 */
chipCfg = ChipConfigInstance(device);
...
/* 器件实例化 */
chipDev = ChipDeviceInstance();
...
/* 器件信息挂载及器件私有操作挂载 */
chipDev->chipCfg = chipCfg;
chipDev->ops = &g_gt911ChipOps;
...
/* 注册器件驱动至平台驱动 */
RegisterChipDevice(chipDev);
...
}
struct HdfDriverEntry g_touchGoodixChipEntry = {
.moduleVersion = 1,
.moduleName = "HDF_TOUCH_GT911",
.Init = HdfGoodixChipInit, // 器件驱动初始化函数
.Release = HdfGoodixChipRelease,
};
HDF_INIT(g_touchGoodixChipEntry); // 注册器件驱动至HDF框架
代码分布
c
/drivers/peripheral/input
/drivers/framework/model/input
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