mipi相机的mipi 频率计算方式

[复制链接] · 发表于 2024-1-5 10:04:34

我看到imx415驱动代码里，support_mode结构体是这样定义的:static const struct imx415_mode supported_modes[] = {

.bus_fmt = MEDIA_BUS_FMT_SGBRG10_1X10,
.width = 3840,
.height = 2160,
.max_fps = {
.numerator = 10000,
.denominator = 300000,
},
.exp_def = 0x08ca - 0x08,
.hts_def = 0x044c * IMX415_4LANES * 2,
.vts_def = 0x08ca,
.global_reg_list = imx415_global_10bit_3864x2192_regs,
.reg_list = imx415_linear_10bit_3864x2192_891M_regs,
.hdr_mode = NO_HDR,
.mipi_freq_idx = 1,
.bpp = 10,
.vc[PAD0] = V4L2_MBUS_CSI2_CHANNEL_0,

}
而mipi频率有这4个:
static const s64 link_freq_items[] = {
MIPI_FREQ_297M,
MIPI_FREQ_446M,
MIPI_FREQ_743M,
MIPI_FREQ_891M,
};

根据mipi_freq_index，应该是446M的频率。但是按照我的理解，mipi计算是这样的,mipi freq = hts*vts*fps*bpp/lan_num/2。那结合上面的，算出来是742500000,并不是446M，请问我哪里理解的不对啊，感谢感谢！