hypervisor display显卡节点card0生成过程

最新推荐文章于 2024-12-03 14:53:15 发布

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最新推荐文章于 2024-12-03 14:53:15 发布 · 1k 阅读

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#java #数据库 #开发语言

文章详细描述了在Android平台中，QCOM设备树配置文件（如direwolf-g9ph.dtsi和quin-vm-display-la.dtsi）的结构，以及Makfile中针对不同配置（如单LA和QUIN_GVM）的编译设置。重点讨论了如何通过msm-cfg和msm-hyp-legacy模块创建card0和renderD128DRM设备，以及驱动加载和初始化过程中的关键步骤。

ditsi 配置

lagvm/LINUX/android/vendor/qcom/proprietary/devicetree/qcom

direwolf-g9ph.dts   #include "direwolf-vm-la.dtsi"
direwolf-vm-la.dtsi #include "display/quin-vm-display-la.dtsi"
quin-vm-display-la.dtsi
//对应/sys/class/drm/card0/device/driver的节点
//dtsi节点层级
//soc:
//qcom,sde-cfg:
//qcom,sde-sub-cfg@0:
//qcom,sde_kms_hyp@ae00000
&soc {
        sde_cfg: qcom,sde-cfg {
                compatible = "qcom,sde-cfg";

                qcom,sde-sub-cfg@0 {
                        reg = <0>;
                        wfd_kms: qcom,wfd_kms@0 {
                                compatible = "qcom,wfd-kms";
                                qcom,client-id = "7815";
                        };

                        qcom,sde_kms_hyp@ae00000 {
                                compatible = "qcom,sde-kms-hyp";
                                qcom,kms = <&wfd_kms>;
                        };
                };

                qcom,sde-sub-cfg@1 {
                        reg = <1>;
                        qcom,sde_kms_hyp@ae00000 {
                                compatible = "qcom,sde-kms-hyp-legacy";
                                qcom,client-id = "7815";
                        };
                };
        };
};

Makfile 配置

# SPDX-License-Identifier: GPL-2.0-only
//单LA 
# auto-detect subdirs
ifeq (y, $(findstring y, $(CONFIG_ARCH_SA8155) $(CONFIG_ARCH_SA6155) $(CONFIG_ARCH_SA8195)))
include $(srctree)/techpack/display/config/augen3disp.conf
LINUXINCLUDE += -include $(srctree)/techpack/display/config/augen3dispconf.h
LINUXINCLUDE += -I$(srctree)/techpack/display/include \
        -I$(srctree)/techpack/display/include/uapi/display

USERINCLUDE = -I$(srctree)/techpack/display/include/uapi/display
endif
//Q+A  这个CONFIG_QTI_QUIN_GVM宏enable
ifeq (y, $(findstring y, $(CONFIG_QTI_QUIN_GVM)))
include $(srctree)/techpack/display/config/gvmgen3disp.conf
LINUXINCLUDE += -include $(srctree)/techpack/display/config/gvmgen3dispconf.h
endif

//根据config 配置msm-hyp msm-hyp-legacy msm-cfg参与编译
obj-$(CONFIG_DRM_MSM) += msm/
obj-$(CONFIG_DRM_MSM_HYP) += msm-hyp/
obj-$(CONFIG_DRM_MSM_HYP_LEGACY) += msm-hyp-legacy/
obj-$(CONFIG_MSM_SDE_ROTATOR) += rotator/
obj-$(CONFIG_DRM_MSM_CFG) += msm-cfg/

/techpack/display/config/gvmgen3dispconf.h
* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
 */

#define CONFIG_DRM_MSM_HYP 1
#define CONFIG_DRM_MSM_HYP_WFD 1
#define CONFIG_SYNC_FILE 1
#define CONFIG_DRM_MSM_LEASE 1

gvmgen3disp.conf
export CONFIG_DRM_MSM_LEASE=y
export CONFIG_SYNC_FILE=y
export CONFIG_DRM_MSM_HYP_WFD=y
ifeq ($(CONFIG_QGKI), y)
export CONFIG_DRM_MSM_HYP=y
export CONFIG_DRM_MSM_HYP_LEGACY=y
export CONFIG_DRM_MSM_CFG=y
endif