Android 车载虚拟化底层技术-Kernel 5.15 -Android13(multi-cards)技术实现

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Android Display Graphics系列文章-汇总

本文主要包括部分：

一、Android13的Kernel 5.15版本

1.1 Kernel 5.15 情况说明

1.2 前置条件

二、QCM61*5 plane配置

2.1 multi-card配置

2.2 移植msm-lease

2.3 配置信息确认

三、Kernel 5.15 mutil-card方案实现

3.1 移植详细代码实现

一、Android13的Kernel 5.15版本

1.1 Kernel 5.15 情况说明

高通提供Android 13基线代码，有的是基于Kernel 5.15，在前两篇文章中，讲解了Kernel 5.4、5.10中就已经不存在msm-lease了。所以在Kernel 5.15版本上，也是一样的。

在Kernel 5.15中，msm的驱动已经移至 target_ap/vendor/qcom/opensource/display-drivers路径下；需要将msm-lease移植适配到此路径下，msm-lease同样需要移植到此路径下；

1.2 前置条件

移植multi-card的前置条件是，DSI屏和DP屏的驱动已经调试正常，单card(android默认)下是显示相同内容的。

此时再按照以下patch实现multi-card。

二、QCM 6**5 plane配置

2.1 multi-card配置

以QCM61*5为例，说明配置card信息；

下面配置：sde_card1的接口是DSI，并且分配了4个plane；sde_card2的接口是DP1，分配了2个plane。实际使用场景可以根据对现实的需求分配。

+	
+	
+	sde_card1: qcom,sde-kms-lease@0 {
+		compatible = "qcom,sde-kms-lease";
+		qcom,dev-name = "msm_drm1";
+		qcom,lease-connectors = "DSI-1";
+		qcom,lease-planes = "plane-0","plane-1","plane-2","plane-5";
+	};
+	
+	sde_card2: qcom,sde-kms-lease@1 {
+		compatible = "qcom,sde-kms-lease";
+		qcom,dev-name = "msm_drm2";
+
+		qcom,lease-connectors = "DP-1";
+		qcom,lease-planes ="plane-3","plane-4";
+	};
+};
+&sde_dp {
+	status = "okay";
+	qcom,dp-hpd-gpio = <&tlmm 100 0>;
+	qcom,dp-low-power-hw-hpd;
 };

2.2 移植msm-lease

将适合该平台的msm-lease文件放到target_ap/vendor/qcom/opensource/display-drivers/路径下，并在内核中增加配置。

--- a/config/trinketdisp.conf
+++ b/config/trinketdisp.conf
@@ -14,3 +14,4 @@
 export CONFIG_MSM_SDE_ROTATOR_EVTLOG_DEBUG=y
 export CONFIG_DRM_SDE_RSC=y
 export CONFIG_DRM_CLIENT_BOOTSPLASH=y
+export CONFIG_DRM_MSM_LEASE=y
\ No newline at end of file

--- a/config/trinketdispconf.h
+++ b/config/trinketdispconf.h
@@ -16,3 +16,4 @@
 #define CONFIG_MSM_SDE_ROTATOR_EVTLOG_DEBUG 1
 #define CONFIG_DRM_SDE_RSC 1
 #define CONFIG_DRM_CLIENT_BOOTSPLASH 1
+#define CONFIG_DRM_MSM_LEASE 1

在内核中要增加头文件：

kernel_platform/common/include/drm/drmP.h
kernel_platform/common/include/drm/drm_os_linux.h
kernel_platform/common/include/drm/drm_pci.h
kernel_platform/msm-kernel/include/drm/drmP.h
kernel_platform/msm-kernel/include/drm/drm_os_linux.h
kernel_platform/msm-kernel/include/drm/drm_pci.h

修改vendor/qcom/opensource/display-drivers/msm/msm_drv.h

vendor/qcom/opensource/display-drivers/msm/msm_drv.c ,使其调用msm_drm_register()注册drm时，调用msm_lease_drm_unregister()注册lease_drm。

移植完成，同样可以看到两个card节点，

2.3 配置信息确认

可以查看上两篇文章 中此章节内容

三、Kernel 5.15 mutil-card方案实现

3.1 移植详细代码实现

dtsi的card配置信息，修改路径在target/vendor/qcom/proprietary/

diff --git a/display-devicetree/display/trinket-sde-display-iot-dp-idp.dtsi b/display-devicetree/display/trinket-sde-display-iot-dp-idp.dtsi

--- a/display-devicetree/display/trinket-sde-display-iot-dp-idp.dtsi

+++ b/display-devicetree/display/trinket-sde-display-iot-dp-idp.dtsi

@@ -16,7 +16,7 @@

 &mdss_mdp {

 	qcom,sde-crtc-num-pref = <5>;

 	qcom,sde-reg-dma-version = <0>;

-	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp>;

+	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp &sde_card1 &sde_card2>;

 };



 &qupv3_se5_i2c {

diff --git a/display-devicetree/display/trinket-sde-display-iot-dp-usbc-idp.dtsi b/display-devicetree/display/trinket-sde-display-iot-dp-usbc-idp.dtsi

--- a/display-devicetree/display/trinket-sde-display-iot-dp-usbc-idp.dtsi

+++ b/display-devicetree/display/trinket-sde-display-iot-dp-usbc-idp.dtsi

@@ -5,5 +5,6 @@

 };



 &mdss_mdp {

-	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp>;

+	/delete-property/ connectors;

+	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp &sde_card1 &sde_card2>;

 };

diff --git a/display-devicetree/display/trinket-sde-display-iot-idp.dtsi b/display-devicetree/display/trinket-sde-display-iot-idp.dtsi

--- a/display-devicetree/display/trinket-sde-display-iot-idp.dtsi

+++ b/display-devicetree/display/trinket-sde-display-iot-idp.dtsi

@@ -36,7 +36,7 @@

 };



 &mdss_mdp {

-	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp>;

+	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp &sde_card1 &sde_card2>;

 };



 &qupv3_se2_i2c {

diff --git a/display-devicetree/display/trinket-sde-display.dtsi b/display-devicetree/display/trinket-sde-display.dtsi

--- a/display-devicetree/display/trinket-sde-display.dtsi

+++ b/display-devicetree/display/trinket-sde-display.dtsi

@@ -135,12 +135,34 @@

 		cell-index = <0>;

 		label = "wb_display";

 	};

+	

+	

+	sde_card1: qcom,sde-kms-lease@0 {

+		compatible = "qcom,sde-kms-lease";

+		qcom,dev-name = "msm_drm1";

+		qcom,lease-connectors = "DSI-1";

+		qcom,lease-planes = "plane-0","plane-1","plane-2","plane-5";

+	};

+	

+	sde_card2: qcom,sde-kms-lease@1 {

+		compatible = "qcom,sde-kms-lease";

+		qcom,dev-name = "msm_drm2";

+

+		qcom,lease-connectors = "DP-1";

+		qcom,lease-planes ="plane-3","plane-4";

+	};

+};

+&sde_dp {

+	status = "okay";

+	qcom,dp-hpd-gpio = <&tlmm 100 0>;

+	qcom,dp-low-power-hw-hpd;

 };



 &mdss_mdp {

-	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp>;

+	connectors = <&smmu_sde_unsec &smmu_sde_sec &sde_wb &ivi_serder_driver &sde_dsi &sde_dp &sde_card1 &sde_card2>;

 };



+

 &dsi_sim_vid {

 	qcom,dsi-select-clocks = "pll_byte_clk0", "pll_dsi_clk0";

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Android Display Graphics系列文章-汇总

Android Display Graphics系列文章-汇总

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