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器件型号：SN65DSI83 工具/软件：
您好 TI：
我们使用了该芯片。
内核版本：v6.1
器件树：
bridge@2c {
compatible = "ti,sn65dsi83";
reg = <0x2c>;
// reg = <0x58>;
enable = <&gpio2 RK_PC5 GPIO_ACTIVE_HIGH>;
vcc-supply = <®_sn65dsi83_1v8>;
// status = "disabled";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
bridge_in:endpoint{
remote-endpoint = <&dsi_out_panel>;
data-lanes = <1 2 3 4>;
};
};
port@2 {
reg = <2>;
bridge_out:endpoint{
remote-endpoint = <&panel_in_dsi>;
};
};
};
};
};
&dsi_out_panel{
remote-endpoint = <&bridge_in>;
};
&panel_in_dsi{
remote-endpoint = <&bridge_out>;
};
将调试打印添加到 sn65dsi83_parse_dt 函数中。
static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
{
struct drm_bridge *panel_bridge;
struct device *dev = ctx->dev;
ctx->lvds_dual_link = false;
ctx->lvds_dual_link_even_odd_swap = false;
if (model != MODEL_SN65DSI83) {
struct device_node *port2, *port3;
int dual_link;
port2 = of_graph_get_port_by_id(dev->of_node, 2);
port3 = of_graph_get_port_by_id(dev->of_node, 3);
dual_link = drm_of_lvds_get_dual_link_pixel_order(port2, port3);
of_node_put(port2);
of_node_put(port3);
if (dual_link == DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS) {
ctx->lvds_dual_link = true;
/* Odd pixels to LVDS Channel A, even pixels to B */
ctx->lvds_dual_link_even_odd_swap = false;
} else if (dual_link == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS) {
ctx->lvds_dual_link = true;
/* Even pixels to LVDS Channel A, odd pixels to B */
ctx->lvds_dual_link_even_odd_swap = true;
}
}
panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 2, 0);
printk("%s line = %d model = %d panel_bridge = %p \n",__FUNCTION__,__LINE__,model,panel_bridge);
if (IS_ERR(panel_bridge))
return PTR_ERR(panel_bridge);
ctx->panel_bridge = panel_bridge;
ctx->vcc = devm_regulator_get(dev, "vcc");
if (IS_ERR(ctx->vcc))
return dev_err_probe(dev, PTR_ERR(ctx->vcc),
"Failed to get supply 'vcc'\n");
return 0;
}
输出日志：
[ 8.105162] platform fde20000.dsi: Fixed dependency cycle(s) with /vop@fdd90000/ports/port@3/endpoint@0 [ 8.733051] i2c 3-002c: Fixed dependency cycle(s) with /dsi@fde20000/panel@0/ports/port@0/endpoint [ 8.733064] i2c 3-002c: Fixed dependency cycle(s) with /dsi@fde20000/ports/port@1/endpoint [ 10.116646] mipi-dsi fde20000.dsi.0: Fixed dependency cycle(s) with /i2c@feab0000/bridge@2c/ports/port@2/endpoint [ 10.151563] sn65dsi83_parse_dt line = 609 model = 0 panel_bridge = fffffffffffffdfb [ 10.151574] sn65dsi83_probe line = 701 ret = -517 [ 10.261043] sn65dsi83_parse_dt line = 609 model = 0 panel_bridge = fffffffffffffdfb [ 10.261070] sn65dsi83_probe line = 701 ret = -517 [ 10.272907] sn65dsi83_parse_dt line = 609 model = 0 panel_bridge = fffffffffffffdfb [ 10.272923] sn65dsi83_probe line = 701 ret = -517 [ 10.388702] sn65dsi83_parse_dt line = 609 model = 0 panel_bridge = fffffffffffffdfb [ 10.388717] sn65dsi83_probe line = 701 ret = -517 [ 10.399740] sn65dsi83_parse_dt line = 609 model = 0 panel_bridge = fffffffffffffdfb [ 10.399754] sn65dsi83_probe line = 701 ret = -517 [ 20.650585] sn65dsi83_parse_dt line = 609 model = 0 panel_bridge = fffffffffffffdfb [ 20.650683] sn65dsi83_probe line = 701 ret = -517
