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RK3568开发板上应用Mesa 3D_rk3568 panfrost

作者：神奇cpp | 2024-08-18 19:21:19

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rk3568 panfrost

前言

本次采用的开发板为扬帆“竞”开发板，扬帆“竞”采用瑞芯微RK3568（Cortex-A55）四核64位超强CPU，搭载OpenHarmony最新操作系统，主频最高达2.0GHz。采用 Mali-G52 GPU，支持4K、H.265/H.264视频解码。
OpenHarmony最新版本的L2标准版图形子系统相比之前版本有着非常大的改动，使用了全新设计的框架，并使用Render Service替换了原来的Weston。图形栈整体上分为三层，从上到下依次为接口层、框架层和引擎层。设计上更加清晰，可以更加的灵活的适配不同的底层图形库和不同的显示硬件，最大限度的发挥硬件性能而不用影响到整体图形栈。


框架层的整体功能如下表，框架层的核心就是Render Service渲染服务。

模块能力描述
Render Servicel （渲染服务）提供UI框架的绘制能力，其核心职责是将ArkUI的控件描述转换成绘制树信息，根据对应的渲染策略，进行最佳路径渲染。同时，负责多窗口流畅和空间态下UI共享的核心底层机制。
Drawing （绘制）提供图形子系统内部的标准化接口，主要完成2D渲染、3D渲染和渲染引擎的管理等基本功能。
Animation (动画）提供动画引擎的相关能力。
Effect （效果）主要完成图片效果、渲染特效等效果处理的能力，包括：多效果的串联、并联处理，在布局时加入渲染特效、控件交互特效等相关能力。
显示与内存管理此模块是图形栈与硬件解耦的主要模块，主要定义了OpenHarmony 显示与内存管理的能力，其定义的南向HDI 接口需要让不同的OEM厂商完成对OpenHarmony图形栈的适配。

新的Render Service图形框架默认提供了对OpenGL的支持，并使用API HOOK技术，实现了OpenGL接口和实现的分离，大幅度降低了OpenGL库的适配难度。
扬帆“竞”开发板默认使用的是闭源的libmali-bifrost-g52-g2p0-ohos库，也可以使用开源的Mesa 3D库，实现对OpenGL的支持，在高级图形应用的开发和调试方面非常方便。

使用Mesa库

编译Mesa库

OpenHarmony已经在三方库中集成Mesa库。下载OpenHarmony全量代码，Mesa库在third_party/mesa3d。
进入third_party/mesa3d/目录，OpenHarmony已经提供了编译脚本。其中ohos/build_ohos.py就是针对新图形框架的编译脚本，参考README_zh.md文档，先进行一次全量编译，然后执行。

#python ohos/build_ohos.py </path/to/openharmony> yangfan-j </path/to/openharmony>/third_party/mesa3d

 

命令编译出mesa库。

生成Mesa组件

1.在device/soc/rockchip/rk3568/hardware/gpu/目录下新建lib-mesa目录，用于存放Mesa 3D库文件。

#mkdir …/device/soc/rockchip/rk3568/hardware/gpu/lib-mesa

2.将编译生成的Mesa 3D库文件拷贝到lib-mesa目录：

  1. #cp build-ohos/install/lib/libgbm.so.1.0.0 ../device/soc/rockchip/rk3568/hardware/gpu/lib-mesa/
  2. #cp build-ohos/install/lib/libglapi.so.0.0.0 ../device/soc/rockchip/rk3568/hardware/gpu/lib-mesa/
  3. #cp build-ohos/src/egl/libEGL.so.1.0.0 ../device/soc/rockchip/rk3568/hardware/gpu/lib-mesa/
  4. #cp build-ohos/install/lib/libGLESv1_CM.so.1.1.0 ../device/soc/rockchip/rk3568/hardware/gpu/lib-mesa/
  5. #cp build-ohos/install/lib/libGLESv2.so.2.0.0 ../device/soc/rockchip/rk3568/hardware/gpu/lib-mesa/
  6. #cp build-ohos/src/gallium/targets/dri/libgallium_dri.so ../ device/soc/rockchip/rk3568/hardware/gpu/lib-mesa/
  7. #cp build-ohos/install/lib/dri/panfrost_dri.so ../device/soc/rockchip/rk3568/hardware/gpu/lib-mesa/

3.修改device/soc/rockchip/rk3568/hardware/gpu/BUILD.gn

  1. index 7d269ac..690a69d 100644
  2. --- a/rk3568/hardware/gpu/BUILD.gn
  3. +++ b/rk3568/hardware/gpu/BUILD.gn
  4. @@ -47,3 +47,108 @@ ohos_prebuilt_shared_library("mali-bifrost-g52-g2p0-ohos") {
  5.      "libmali.so.1",
  6.    ]
  7.  }
  8. +
  9. +ohos_prebuilt_shared_library("mesa_gbm") {
  10. +  source = "lib-mesa/libgbm.so.1.0.0"
  11. +  install_enable = true
  12. +  install_images = [ chipset_base_dir ]
  13. +  relative_install_dir = "chipsetsdk"
  14. +  subsystem_name = "rockchip_products"
  15. +  part_name = "rockchip_products"
  16. +  symlink_target_name = [
  17. +    "libgbm.so.1",
  18. +    "libgbm.so",
  19. +  ]
  20. +}
  21. +
  22. +ohos_prebuilt_shared_library("mesa_egl") {
  23. +  source = "lib-mesa/libEGL.so.1.0.0"
  24. +  install_enable = true
  25. +  install_images = [ chipset_base_dir ]
  26. +  relative_install_dir = "chipsetsdk"
  27. +  subsystem_name = "rockchip_products"
  28. +  part_name = "rockchip_products"
  29. +  symlink_target_name = [
  30. +    "libEGL.so.1",
  31. +    "libEGL.so",
  32. +    "libGLESv1.so",
  33. +    "libEGL_impl.so",
  34. +  ]
  35. +}
  36. +
  37. +ohos_prebuilt_shared_library("mesa_glapi") {
  38. +  source = "lib-mesa/libglapi.so.0.0.0"
  39. +  install_enable = true
  40. +  install_images = [ chipset_base_dir ]
  41. +  relative_install_dir = "chipsetsdk"
  42. +  subsystem_name = "rockchip_products"
  43. +  part_name = "rockchip_products"
  44. +  symlink_target_name = [
  45. +    "libglapi.so.0",
  46. +    "libglapi.so",
  47. +  ]
  48. +}
  49. +
  50. +ohos_prebuilt_shared_library("mesa_glesv1") {
  51. +  source = "lib-mesa/libGLESv1_CM.so.1.1.0"
  52. +  install_enable = true
  53. +  install_images = [ chipset_base_dir ]
  54. +  relative_install_dir = "chipsetsdk"
  55. +  subsystem_name = "rockchip_products"
  56. +  part_name = "rockchip_products"
  57. +  symlink_target_name = [
  58. +    "libGLESv1_CM.so.1",
  59. +    "libGLESv1_CM.so",
  60. +    "libGLESv1_impl.so",
  61. +  ]
  62. +}
  63. +
  64. +ohos_prebuilt_shared_library("mesa_glesv2") {
  65. +  source = "lib-mesa/libGLESv2.so.2.0.0"
  66. +  install_enable = true
  67. +  install_images = [ chipset_base_dir ]
  68. +  relative_install_dir = "chipsetsdk"
  69. +  subsystem_name = "rockchip_products"
  70. +  part_name = "rockchip_products"
  71. +  symlink_target_name = [
  72. +    "libGLESv2.so.2",
  73. +    "libGLESv2.so",
  74. +    "libGLESv2_impl.so",
  75. +    "libGLESv3_impl.so",
  76. +  ]
  77. +}
  78. +
  79. +ohos_prebuilt_shared_library("libgallium_dri") {
  80. +  source = "lib-mesa/libgallium_dri.so"
  81. +  install_enable = true
  82. +  install_images = [ chipset_base_dir ]
  83. +  relative_install_dir = "chipsetsdk"
  84. +  subsystem_name = "rockchip_products"
  85. +  part_name = "rockchip_products"
  86. +  symlink_target_name = [ "libgallium_dri.so" ]
  87. +}
  88. +
  89. +ohos_prebuilt_shared_library("panfrost_dri") {
  90. +  source = "lib-mesa/panfrost_dri.so"
  91. +  install_enable = true
  92. +  install_images = [ "system" ]
  93. +  subsystem_name = "rockchip_products"
  94. +  part_name = "rockchip_products"
  95. +  symlink_target_name = [
  96. +    "rockchip_dri.so",
  97. +    "libmali.so.0",
  98. +    "libmali.so.1",
  99. +  ]
  100. +}
  101. +
  102. +group("mesa-gpu") {
  103. +  public_deps = [
  104. +    ":mesa_egl",
  105. +    ":mesa_gbm",
  106. +    ":mesa_glapi",
  107. +    ":mesa_glesv1",
  108. +    ":mesa_glesv2",
  109. +    ":libgallium_dri",
  110. +    ":panfrost_dri",
  111. +  ]
  112. +}
  113.

4.修改device/soc/rockchip/rk3568/hardware/BUILD.gn，使用Mesa 3D库

  1. index 479847d..e778fb0 100644
  2. --- a/rk3568/hardware/BUILD.gn
  3. +++ b/rk3568/hardware/BUILD.gn
  4. @@ -15,7 +15,8 @@ import("//build/ohos.gni")
  5.  
  6.  group("hardware_group") {
  7.    deps = [
  8. -    "//device/soc/rockchip/rk3568/hardware/gpu:mali-bifrost-g52-g2p0-ohos",
  9. +    #"//device/soc/rockchip/rk3568/hardware/gpu:mali-bifrost-g52-g2p0-ohos",
  10. +    "//device/soc/rockchip/rk3568/hardware/gpu:mesa-gpu",
  11.      "//device/soc/rockchip/rk3568/hardware/isp:isp",
  12.      "//device/soc/rockchip/rk3568/hardware/mpp:mpp",
  13.      "//device/soc/rockchip/rk3568/hardware/wifi:ap6xxx",
  14.

修改内核的配置文件

修改内核配置文件，启用panforst驱动。

  1. index 9a9501c..52b3232 100644
  2. --- a/linux-5.10/arch/arm64/configs/yangfan-j_standard_defconfig
  3. +++ b/linux-5.10/arch/arm64/configs/yangfan-j_standard_defconfig
  4. @@ -3622,7 +3622,7 @@ CONFIG_DVB_SP2=m
  5.  #
  6.  # CONFIG_VGA_ARB is not set
  7.  CONFIG_DRM=y
  8. -CONFIG_DRM_IGNORE_IOTCL_PERMIT=y
  9. +# CONFIG_DRM_IGNORE_IOTCL_PERMIT is not set
  10.  CONFIG_DRM_MIPI_DSI=y
  11.  # CONFIG_DRM_DP_AUX_CHARDEV is not set
  12.  # CONFIG_DRM_DEBUG_MM is not set
  13. @@ -3636,6 +3636,8 @@ CONFIG_DRM_FBDEV_OVERALLOC=100
  14.  CONFIG_DRM_LOAD_EDID_FIRMWARE=y
  15.  # CONFIG_DRM_DP_CEC is not set
  16.  CONFIG_DRM_GEM_CMA_HELPER=y
  17. +CONFIG_DRM_GEM_SHMEM_HELPER=y
  18. +CONFIG_DRM_SCHED=y
  19.  
  20.  #
  21.  # I2C encoder or helper chips
  22. @@ -3793,7 +3795,7 @@ CONFIG_DRM_DW_MIPI_DSI=y
  23.  # CONFIG_TINYDRM_ST7735R is not set
  24.  # CONFIG_DRM_PL111 is not set
  25.  # CONFIG_DRM_LIMA is not set
  26. -# CONFIG_DRM_PANFROST is not set
  27. +CONFIG_DRM_PANFROST=y
  28.  # CONFIG_DRM_TIDSS is not set
  29.  # CONFIG_DRM_LEGACY is not set
  30.  CONFIG_DRM_PANEL_ORIENTATION_QUIRKS=y
  31.

修改扬帆“竞”内核补丁

内核补丁需要在Linux系统上使用vim编辑器修改，Windows编辑器修改可能导致编译错误。

  1. index 41a7df5..1a5e5a3 100644
  2. --- a/linux-5.10/yangfan-j_patch/kernel.patch
  3. +++ b/linux-5.10/yangfan-j_patch/kernel.patch
  4. @@ -100948,36 +100948,36 @@ index 000000000..372617fee
  5.  +	};
  6.  +
  7.  +	gpu: gpu@fde60000 {
  8. -+		compatible = "arm,mali-bifrost";
  9. -+		reg = <0x0 0xfde60000 0x0 0x4000>;
  10. ++		compatible = "rockchip, rk3568-mali","arm,mali-bifrost";
  11. ++		reg = <0x0 0xfde60000 0x0 0x20000>;
  12.  +
  13. -+		interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
  14. ++		interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
  15.  +			     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
  16. -+			     <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
  17. -+		interrupt-names = "GPU", "MMU", "JOB";
  18. ++			     <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
  19. ++		interrupt-names = "job", "mmu", "gpu";
  20.  +
  21. -+		upthreshold = <40>;
  22. -+		downdifferential = <10>;
  23. ++		/* upthreshold = <40>; */
  24. ++		/* downdifferential = <10>; */
  25.  +
  26.  +		clocks = <&scmi_clk 1>, <&cru CLK_GPU>;
  27. -+		clock-names = "clk_mali", "clk_gpu";
  28. ++		clock-names = "core", "bus";
  29.  +		power-domains = <&power RK3568_PD_GPU>;
  30.  +		#cooling-cells = <2>;
  31.  +		operating-points-v2 = <&gpu_opp_table>;
  32.  +
  33.  +		status = "disabled";
  34. -+		gpu_power_model: power-model {
  35. -+			compatible = "simple-power-model";
  36. -+			leakage-range= <5 15>;
  37. -+			ls = <(-24002) 22823 0>;
  38. -+			static-coefficient = <100000>;
  39. -+			dynamic-coefficient = <953>;
  40. -+			ts = <(-108890) 63610 (-1355) 20>;
  41. -+			thermal-zone = "gpu-thermal";
  42. -+		};
  43. -+	};
  44. -+
  45. -+	gpu_opp_table: opp-table2 {
  46. ++		/* gpu_power_model: power-model { */
  47. ++		/*	compatible = "simple-power-model"; */
  48. ++		/*	leakage-range= <5 15>; */
  49. ++		/*	ls = <(-24002) 22823 0>; */
  50. ++		/*	static-coefficient = <100000>; */
  51. ++		/*	dynamic-coefficient = <953>; */
  52. ++		/*	ts = <(-108890) 63610 (-1355) 20>; */
  53. ++		/*	thermal-zone = "gpu-thermal"; */
  54. ++		/* }; */
  55. ++	};
  56. ++
  57. ++	gpu_opp_table: gpu-opp-table {
  58.  +		compatible = "operating-points-v2";
  59.  +
  60.  +		mbist-vmin = <825000 900000 950000>;
  61.  
  62.

测试和验证

1.查看GPU中断，panforst驱动已经正常工作。桌面显示和操作正常

2.游戏效果


测试表明，扬帆“竞”开发板的图形界面使用正常且流畅，基础应用都可以正常运行，体验与使用libmali-g52库基本一致。

 

 

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