Vivante GCNANO GPU overview

Introduction

STMicroelectronics STM32MP1平台具有基于Vivante Gcnano GPU的OpenGLES硬件IP。.
您可以在Vivante GCNANO网页上找到更多信息。

Features

Supported open standards

Vivante Gcnano GPU 与以下Khronos的开放标准3D图形:

• OpenGLES 2.0
• OpenGLES 1.1
• OpenVG 1.1
• EGL 1.4

Vivante Gcnano GPU configuration

• Core Clock 264MHz
• Shader Clock 264MHz
• Pixel Rate 264 MPixel/sec
• Triangle Rate 26.4 M tri/sec
• Vertex rate 66 M vtx/sec
• 1 shader core (Vec 4)
• 2.112 GFLOPS shader

GPU softwares

Vivante Gcnano GPU userland libraries

除非客户与Vivante签署了保密协议（如果需要这些库源代码，请联系Vivante）。 Gcnano库（用户）是：

• OpenGLES 1.1 library
• OpenGLES 2.0 library
• EGL 1.4 library
• gbm library
• GAL library
• GLSLC and VSC libraries
• VDK library

Vivante Gcnano kernel driver

Source code is available for all customers 在所有OpenSTLinux基准中。

要访问源代码，请执行以下操作：

devtool修改gcnano-driver-stm32mp

然后在此处下载源代码：

• <your_view>/build*/workspace/sources/gcnano-driver-stm32mp

请参阅 OpenEmbedded - devtool 以了解有关devtool的更多信息。

Additional information

• STMicroelectronics provides debug Vivante Gcnano libraries according to any baseline version, allowing customers to debug/analyze their applications with the Vivante Tool Kit (VTK). Please have a look to the article 如何使用VTK调试Gcnano GPU for more details.

Useful links

• Vivante website: http://www.vivantecorp.com/

EGL

Supported EGL backend

From VIVANTE_GAL3D_Unified_Src_drv_6.1.x, Vivante delivery, Vivante Gcnano libraries support both DRM/GBM and Wayland backends.
Refer to EGL backends article for details.

EGL texture 0-copy

Gcnano supports the EGL texture 0-copy extension.

EGL texture 0-copy extension allows an EGL application to share a texture buffer with the GPU by avoiding to copy the texture from application to the GPU.

Refer to EGL texture 0-copy article for more details.

Graphic Benchmarks

Please refer to the How to test and benchmark OpenGLES article.

Debugging

Please have a look to following articles:

• 如何激活Gcnano GPU调试模式
• 如何使用VTK调试Gcnano GPU

References