# Overview
Source: [https://docs.qualcomm.com/doc/80-70014-19/topic/graphics-overview.html](https://docs.qualcomm.com/doc/80-70014-19/topic/graphics-overview.html)
The graphics subsystem is powered by the Qualcomm^®^ Adreno™ GPU. The Adreno GPU
is a three-dimensional (3D) graphics accelerator with 64‑bit addressing and incorporates
graphics memory (GMEM). The GMEM serves as a dedicated memory for the graphics subsystem
and facilitates Fast Z, color, and stencil rendering.
Additionally, the Adreno GPU supports the Qualcomm^®^ Universal Bandwidth
Compression, enhancing the overall performance.
The Adreno GPU supports the following graphics and compute APIs:
- **OpenGL ES**: [3.0](https://registry.khronos.org/OpenGL/specs/es/3.0/es_spec_3.0.pdf), [3.1](https://registry.khronos.org/OpenGL/specs/es/3.1/es_spec_3.1.pdf), [3.2](https://registry.khronos.org/OpenGL/specs/es/3.2/es_spec_3.2.pdf)
- **OpenCL**: [1.2 FP](https://registry.khronos.org/OpenCL/specs/opencl-1.2.pdf), [2.0 FP](https://registry.khronos.org/SPIR-V/specs/1.0/OpenCL.std.20.pdf)
- **EGL**: [1.5](https://registry.khronos.org/EGL/specs/eglspec.1.5.pdf)
- **Vulkan**: [1.1](https://registry.khronos.org/vulkan/#vulkan1.1)
Note: The Qualcomm Linux platform allows you to develop
applications for QCS6490 and QCS5430.
## Architecture
The following figure shows the architecture of the graphics subsystem.
**Adreno GPU driver**
The Adreno GPU driver comprises a collection of user-mode precompiled libraries and firmware
developed by Qualcomm. The Adreno GPU driver must be used as-is.
Note: To use all the features supported by the Adreno GPU,
ensure that the Adreno GPU driver libraries and firmware listed in the following
tables are present on the device at
/lib/firmware/.
**Adreno GPU libraries**
The following table lists the closed-source Adreno graphics libraries supported in the
user-mode driver:
| Library | Description |
| --- | --- |
| libCB.so | Driver for GPU computing |
| libEGL\_adreno.so | EGL 1.4 driver |
| libeglSubDriverWayland.so | EGL driver for Wayland subsystem |
| libadreno\_utils.so | Utility library for Adreno GPU driver |
| libgsl.so | GSL library |
| libq3dtools\_adreno.so | Adreno profiler support layer |
| libGLESv1\_CM\_adreno.so | OpenGL ES 1.1 driver |
| libGLESv2\_adreno.so | OpenGL ES 2.0/3.0/3.1 driver |
| libq3dtools\_esx.so | OpenGL ES profiler support layer |
| libOpenCL.so | OpenCL library |
| libOpenCL\_adreno.so | OpenCL library for Adreno GPU |
| libllvm-qcom.so | OpenCL compiler library |
| libvulkan\_adreno.so | Vulkan 1.x driver |
| libllvm-glnext.so | OpenGL ES and Vulkan program binary loader |
| libllvm-qgl.so | OpenGL ES and Vulkan core compiler library |
## Adreno GPU firmware
The following table lists the firmware files of the Adreno GPU hardware:
| Firmware | Description |
| --- | --- |
| a660\_sqe.fw | Microcode for command processor |
| a660\_zap | Secure microcode for secure content support |
| a660\_gmu.bin | Microcode for graphics management unit (GMU) |
## Kernel Graphics Support Layer (KGSL)
The KGSL serves as the kernel-mode driver for the Adreno GPU. Its primary function is
to submit commands generated by the Adreno user-mode driver to the Adreno GPU for
processing. Additionally, the KGSL communicates with the graphics management unit
(GMU) to ensure proper state management. The following table provides details about
the KGSL driver:
| **Chipset** | QCS6490/QCS5430 |
| --- | --- |
| **Linux kernel version** | 6.6 |
| **Source code path** | <root\_dir>/source/graphics-kernel/ |
| **GPU DTSI filepath** |