mipi驱动代码
时间: 2023-07-24 20:50:21 浏览: 264
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MIPI驱动代码通常由物理层驱动和显示控制器驱动两部分组成。以下是一个简单的MIPI DSI驱动例子,展示了如何使用Linux内核的MIPI DSI子系统来配置和控制MIPI显示器。
物理层驱动:
```c
static struct mipi_dsi_phy_ops phy_ops = {
.reset = mipi_dsi_phy_reset,
.power_on = mipi_dsi_phy_power_on,
.power_off = mipi_dsi_phy_power_off,
.prepare = mipi_dsi_phy_prepare,
.unprepare = mipi_dsi_phy_unprepare,
.enable_hs = mipi_dsi_phy_enable_hs,
.enable_lp = mipi_dsi_phy_enable_lp,
.set_tlp = mipi_dsi_phy_set_tlp,
.set_hs_clk = mipi_dsi_phy_set_hs_clk,
};
static struct mipi_dsi_phy dsi_phy = {
.dev = {
.of_node = dev->of_node,
},
.ops = &phy_ops,
};
ret = mipi_dsi_attach_phy(dev, &dsi_phy);
if (ret < 0) {
dev_err(dev, "failed to attach phy\n");
return ret;
}
```
显示控制器驱动:
```c
static struct mipi_dsi_device_ops dsi_ops = {
.attach = mipi_dsi_attach,
.detach = mipi_dsi_detach,
.transfer = mipi_dsi_transfer,
};
static struct mipi_dsi_device dsi_device = {
.dev = {
.of_node = dev->of_node,
},
.mode_flags = MIPI_DSI_MODE_VIDEO,
.lanes = 2,
.format = MIPI_DSI_FMT_RGB888,
.ops = &dsi_ops,
};
ret = mipi_dsi_attach(&dsi_device);
if (ret < 0) {
dev_err(dev, "failed to attach dsi device\n");
return ret;
}
```
这个例子中,mipi_dsi_phy结构体定义了物理层驱动所需的函数指针。在mipi_dsi_attach_phy函数中,将DSI设备与物理层驱动绑定起来。
同时,mipi_dsi_device结构体定义了显示控制器驱动所需的参数,包括像素格式、数据通道数等。在mipi_dsi_attach函数中,将DSI设备与显示控制器驱动绑定起来,以便后续调用mipi_dsi_transfer函数来传输显示数据。
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