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< / div > < div class = "- topic/body concept/conbody body conbody" > < p class = "- topic/p p" data-ofbid = "d126418e22__20250121171601" > 本章节介绍 LCD 外设在 < span class = "- topic/ph ph" > Luban-Lite< / span > 上的适配方法。用户可选择以下任意方式配置屏参数：< / p > < div class = "- topic/p p" data-ofbid = "d126418e27__20250121171601" >
< ul class = "- topic/ul ul" id = "display_screen_configuration__ul_zzy_l2g_d1c" data-ofbid = "display_screen_configuration__ul_zzy_l2g_d1c" > < li class = "- topic/li li" data-ofbid = "d126418e30__20250121171601" > 将以下屏参数写入 panel 驱动源码中：< div class = "- topic/note note note note_note" id = "display_screen_configuration__note_yzz_q2g_d1c" data-ofbid = "display_screen_configuration__note_yzz_q2g_d1c" > < span class = "note__title" > 注：< / span >
< p class = "- topic/p p" data-ofbid = "d126418e34__20250121171601" > 对于屏时序参数，只有当 < span class = "+ topic/ph sw-d/filepath ph filepath" > board.dts< / span > 文件的 panel 结点没有设置
display-timings 子节点时，此方式才会生效。< / p >
< / div > < ul class = "- topic/ul ul" id = "display_screen_configuration__ul_jqw_f2g_d1c" data-ofbid = "display_screen_configuration__ul_jqw_f2g_d1c" > < li class = "- topic/li li" data-ofbid = "d126418e41__20250121171601" > 时序参数< / li > < li class = "- topic/li li" data-ofbid = "d126418e43__20250121171601" > 屏接口参数< / li > < / ul > < / li > < / ul >
< / div > < section class = "- topic/section section" id = "display_screen_configuration__section_rjf_4gk_ndc" data-ofbid = "display_screen_configuration__section_rjf_4gk_ndc" > < h2 class = "- topic/title title sectiontitle" > 屏配置方式< / h2 >
< div class = "- topic/p p" data-ofbid = "d126418e51__20250121171601" >
< div class = "- topic/div div" id = "display_screen_configuration__div_qrj_xhs_2dc" >
< p class = "- topic/p p" data-ofbid = "d126418e55__20250121171601" > 方式一：将屏参数写入到 < span class = "+ topic/ph sw-d/filepath ph filepath" > board.dts< / span > 文件中。关于 < span class = "+ topic/keyword pr-d/parmname keyword parmname" > panel_lvds< / span >
参数，可查看 < a class = "- topic/xref xref" href = "display_parameter_panel_lvds.html" > Panel_LVDS< / a > 。< / p >
< / div >
< div class = "- topic/div div" id = "display_screen_configuration__div_qmp_xhs_2dc" >
< p class = "- topic/p p" data-ofbid = "d126418e71__20250121171601" > 方式二：将屏参数写入 panel 驱动源码中。< / p >
< div class = "- topic/note note tip note_tip" id = "display_screen_configuration__note_xf4_qn3_ddc" data-ofbid = "display_screen_configuration__note_xf4_qn3_ddc" > < span class = "note__title" > 提示：< / span >
< p class = "- topic/p p" data-ofbid = "d126418e76__20250121171601" > 仅在 < span class = "+ topic/ph sw-d/filepath ph filepath" > board.dts< / span > 文件的 panel 结点不存在
< span class = "+ topic/keyword pr-d/parmname keyword parmname" > display-timings< / span > 子节点，方式二才会生效。< / p >
< / div >
< ul class = "- topic/ul ul simple" id = "display_screen_configuration__ul_s1f_4gs_2dc" data-ofbid = "display_screen_configuration__ul_s1f_4gs_2dc" > < li class = "- topic/li li" data-ofbid = "d126418e87__20250121171601" >
< p class = "- topic/p p" data-ofbid = "d126418e89__20250121171601" > 时序参数< / p >
< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "display_screen_configuration__codeblock_gcb_rgs_2dc" data-ofbid = "display_screen_configuration__codeblock_gcb_rgs_2dc" > < em class = "hl-comment" > /* Init the videomode parameter, dts will override the initial value. */< / em >
< strong class = "hl-keyword" > static< / strong > < strong class = "hl-keyword" > struct< / strong > videomode panel_vm = {
.pixelclock = < span class = "hl-number" > 130000000< / span > ,
.hactive = < span class = "hl-number" > 1080< / span > ,
.hfront_porch = < span class = "hl-number" > 160< / span > ,
.hback_porch = < span class = "hl-number" > 160< / span > ,
.hsync_len = < span class = "hl-number" > 40< / span > ,
.vactive = < span class = "hl-number" > 1920< / span > ,
.vfront_porch = < span class = "hl-number" > 10< / span > ,
.vback_porch = < span class = "hl-number" > 20< / span > ,
.vsync_len = < span class = "hl-number" > 8< / span > ,
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE
};< / pre >
< / li > < li class = "- topic/li li" data-ofbid = "d126418e95__20250121171601" >
< p class = "- topic/p p" data-ofbid = "d126418e97__20250121171601" > 屏接口参数< / p >
< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "display_screen_configuration__codeblock_o1k_rgs_2dc" data-ofbid = "display_screen_configuration__codeblock_o1k_rgs_2dc" > < strong class = "hl-keyword" > struct< / strong > panel_dsi dsi = {
.mode = DSI_MOD_VID_BURST,
.format = DSI_FMT_RGB888,
.lane_num = < span class = "hl-number" > 4< / span > ,
};< / pre >
< / li > < / ul >
< / div >
< / div >
< / section > < section class = "- topic/section section" id = "display_screen_configuration__section_iqw_f2g_d1c" data-ofbid = "display_screen_configuration__section_iqw_f2g_d1c" > < h2 class = "- topic/title title sectiontitle" > 屏配置步骤< / h2 >
< p class = "- topic/p p" data-ofbid = "d126418e111__20250121171601" > 屏配置需要以下操作：< / p >
< ol class = "- topic/ol ol" id = "display_screen_configuration__ol_oqw_f2g_d1c" data-ofbid = "display_screen_configuration__ol_oqw_f2g_d1c" > < li class = "- topic/li li" data-ofbid = "d126418e115__20250121171601" > 为 LCD 适配一款 panel 驱动。< / li > < li class = "- topic/li li" data-ofbid = "d126418e117__20250121171601" > 确保一条正确的数据通路。< / li > < / ol >
< div class = "- topic/p p" data-ofbid = "d126418e120__20250121171601" > 具体配置步骤如下：< ol class = "- topic/ol ol" id = "display_screen_configuration__ol_mwz_v2g_d1c" data-ofbid = "display_screen_configuration__ol_mwz_v2g_d1c" > < li class = "- topic/li li" data-ofbid = "d126418e123__20250121171601" > 配置 panel 驱动：< ul class = "- topic/ul ul" id = "display_screen_configuration__ul_osf_csj_ndc" data-ofbid = "display_screen_configuration__ul_osf_csj_ndc" > < li class = "- topic/li li" data-ofbid = "d126418e126__20250121171601" >
< p class = "- topic/p p" data-ofbid = "d126418e128__20250121171601" > 使能 Luban SDK 提供的 RGB/ LVDS panel 驱动，详见 < a class = "- topic/xref xref" href = "display_menuconfig.html#display_menuconfig_configuration__li_enable_panel_drivers" > Panel
配置< / a > 。< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d126418e135__20250121171601" >
< p class = "- topic/p p" data-ofbid = "d126418e137__20250121171601" > 编写一个 panel 驱动，详情可查看< a xml:lang = "zh-CN" lang = "zh-CN" class = "- topic/xref xref" href = "display_driver-intro.html" > 屏驱动支持< / a > 。< / p >
< / li > < / ul > < / li > < li class = "- topic/li li" data-ofbid = "d126418e144__20250121171601" > 数据通路< div class = "- topic/p p" data-ofbid = "d126418e146__20250121171601" > LCD
正常显示时，显示模块会形成一条完整的数据通道。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "display_screen_configuration__codeblock_ahl_hsh_mbc" data-ofbid = "display_screen_configuration__codeblock_ahl_hsh_mbc" > fb0 --> display engine --> display interface --> panel< / pre > < / div > < div class = "- topic/p p" data-ofbid = "d126418e150__20250121171601" > 数据通道的关系在
< span class = "+ topic/ph sw-d/filepath ph filepath" > board.dts< / span > 中体现，以 LVDS
屏幕为例：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "display_screen_configuration__codeblock_y3n_lfg_d1c" data-ofbid = "display_screen_configuration__codeblock_y3n_lfg_d1c" > & fb0 {
port {
fb0_out: endpoint {
remote-endpoint = < & de0_in> ;
};
};
};
& de0 {
status = < span class = "hl-string" > "okay"< / span > ;
port@< span class = "hl-number" > 0< / span > {
reg = < < span class = "hl-number" > 0< / span > > ;
de0_in: endpoint {
remote-endpoint = < & fb0_out> ;
};
};
port@< span class = "hl-number" > 1< / span > {
reg = < < span class = "hl-number" > 1< / span > > ;
de0_out: endpoint {
remote-endpoint = < & lvds0_in> ;
};
};
};
& rgb0 {
status = < span class = "hl-string" > "disabled"< / span > ;
port@< span class = "hl-number" > 0< / span > {
reg = < < span class = "hl-number" > 0< / span > > ;
rgb0_in: endpoint {
remote-endpoint = < & rgb0_in> ;
};
};
port@< span class = "hl-number" > 1< / span > {
reg = < < span class = "hl-number" > 1< / span > > ;
rgb0_out: endpoint {
remote-endpoint = < & panel_rgb_in> ;
};
};
};
& lvds0 {
status = < span class = "hl-string" > "okay"< / span > ;
port@< span class = "hl-number" > 0< / span > {
reg = < < span class = "hl-number" > 0< / span > > ;
lvds0_in: endpoint {
remote-endpoint = < & de0_out> ;
};
};
port@< span class = "hl-number" > 1< / span > {
reg = < < span class = "hl-number" > 1< / span > > ;
lvds0_out: endpoint {
remote-endpoint = < & panel_lvds_in> ;
};
};
};
& dsi0 {
status = < span class = "hl-string" > "disabled"< / span > ;
port@< span class = "hl-number" > 0< / span > {
reg = < < span class = "hl-number" > 0< / span > > ;
dsi0_in: endpoint {
remote-endpoint = < & dsi0_in> ;
};
};
port@< span class = "hl-number" > 1< / span > {
reg = < < span class = "hl-number" > 1< / span > > ;
dsi0_out: endpoint {
remote-endpoint = < & panel_dsi_in> ;
};
};
};< / pre > < / div > < div class = "- topic/p p" data-ofbid = "d126418e157__20250121171601" > 在上述例子中，< span class = "+ topic/ph sw-d/filepath ph filepath" > board.dts< / span > 通过 port 和
status
结点，配置了一条数据通道。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "display_screen_configuration__codeblock_hmw_lsh_mbc" data-ofbid = "display_screen_configuration__codeblock_hmw_lsh_mbc" > fb | de | | lvds | panel
port --> port0 port1 --> port0 port1 --> port< / pre > < / div > < p class = "- topic/p p" data-ofbid = "d126418e164__20250121171601" > 如果
< span class = "+ topic/ph sw-d/filepath ph filepath" > board.dts< / span > 中没有正确配置一条数据通道，显示驱动无法完成初始化。< / p > < / li > < / ol > < / div >
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