Hi,
Mali GPU will support OpenCL and as well as android.
Is there any SDK will support OpenCL for Android?
As of Android 4.3, most Android devices don't allow OpenCL kernel compilation.
OpenCL Blog: OpenCL Disabled on Android
You can read a full assessment and retort here:
Google blocked OpenCL on Nexus with Android 4.3 - Blog - StreamComputing
This doesn't mean it can't be done, it simply means you have to use older Android tools/versions or Linux toolchains. Because Google is discouraging OpenCL in favor of RenderScript (read Tim Murray's post on Stack Overflow), you won't find a lot of demo or sample code for Android. I see you've posted this in ARM Mali Graphics before the Android Community was tagged. akshayagarwal, any further thoughts?
Utilizing the GPU with OpenCL may get you the best performance for your FFT but you might also consider RenderScript, RenderScript Intrinsics, or if SIMD is acceptable, we have a set of NEON FFTs in ProjectNe10. In a few days, we'll be posting an update to Ne10 with more FFTs but the current list is in our DSP header file on GitHub.