[Freedreno] Whether A200 driver is supported by Linux Mainline Kernel

[abhijit]

Hi Rob,

Thank you very much for your reply.

I ensured that --enable-freedreno-kgsl is enabled in libdrm build and 
the same is copied to target

The issue seems to be in mesa build

I observed that there are two mechanism in which application can 
interact with underlaying DRM,
     1. With DRI ($MESA_INSTALL_PATH/src/mesa/drivers/dri)
     2. With Gallium driver ($MESA_INSTALL_PATH/src/gallium/drivers)

Freedreno driver is present only in Case 2. For that reason I disabled 
dri in Mesa build and enabled gallium-xlib intreface, which will enable 
case 2

But still gallium component of freedreno is not building.

For example, r600_dri.so and r300_dri.so are build but freedreno_dri.so 
is not build. I verified that the source code of freedreno is compiling 
though

Setting LIBGL_DEBUG=verbose, is not showing any additional logs. 
However, software pipe is being used for rendering

On Sunday 09 July 2017 10:48 PM, Rob Clark wrote:
> The most obvious thing to check is make sure you use
> --enable-freedreno-kgsl when building libdrm.. if you have that, then
> try:
>
>   LIBGL_DEBUG=verbose glxinfo
>
> BR,
> -R
>
> On Sat, Jul 8, 2017 at 2:07 AM, abhijit <abhijitnaik27 at gmail.com> wrote:
>> Hi,
>>
>> I needed some help with respect to binding of freedreno driver to mesa
>>
>> I have cross compiled freedreno driver for A2XX with main line kernel and
>> added clocking info referring driver from TQ-Embedded
>> "https://www.tq-group.com/en/support/download
>> /?tx_abdownloads_pi1%5Baction%5D=getviewcategory&tx_abdownloads_pi1%5Bcategory_uid%5D=672&tx_abdownloads_pi1%5Bcid%5D=84&tx_abdownloads_pi1%5Bpointer%5D=1&cHash=5e7c087ae16a9426fc0353db0042615a"
>>
>> I also cross-compiled, libdrm and mesa components from freedreno git hub
>>
>> But when I am running "glxinfo" command to verify whether underlaying 3D
>> acceleration is being used, I am observing that softpipe is being used
>> instead of "freedreno"
>>
>> I figured it out that glxinfo uses mesa/src/mesa/drivers/dri/swrast  as user
>> side driver component
>>
>> Files under /src/mesa/drivers/dri use "_mesa_initialize_context" to register
>> them self to mesa component. But I am not seeing any freedreno related
>> source files calling "_mesa_initialize_context"
>>
>> Can you please let me know whether I have to add mesa related
>> functionalities for freedreno or there some other alternatives?
>>
>> Thank you very much :)
>>
>> On Wednesday 31 May 2017 01:12 PM, abhijit wrote:
>>>
>>> Hi,
>>>
>>> We are working on iMx53 Quick start board based on iMx53 application
>>> processor. As you know this has A200 GPU.
>>>
>>> If I see in the mainline kernel 4.11.3, there are no source files for
>>> A2XX GPU. Based on this I am assuming that the mainline doesn't have
>>> support for A2XX.
>>>
>>> However in kernel-msm git checkout from Freedreno, there are A2XX
>>> related source code. I wanted to know whether this code is tested one
>>> and reason for non-inclusion of this code in mainline kernel.
>>>
>>> Are there any pointers how I can go about it.
>>>
>>> Thank you very much :)
>>>
>>> Regards,
>>>     Abhijit
>>
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