How to implement a EGL or DRM display in VA-API driver

[Randy Li]

On 10/27/2016 11:03 PM, Xiang, Haihao wrote:
>> -----Original Message-----
>> From: dri-devel [mailto:dri-devel-bounces at lists.freedesktop.org] On Behalf
>> Of Randy Li
>> Sent: Monday, October 24, 2016 3:59 PM
>> To: libva at lists.freedesktop.org
>> Cc: gwenole.beauchesne at intel.com; dri-devel at lists.freedesktop.org; linux-
>> rockchip at lists.infradead.org; Jaquez, VictorX <victorx.jaquez at intel.com>;
>> eddie.cai <eddie.cai at rock-chips.com>; 林金发 <alpha.lin at rock-chips.com>;
>> herman.chen at rock-chips.com; vjaquez at igalia.com
>> Subject: How to implement a EGL or DRM display in VA-API driver
>>
>> Hello:
>>   I am going to implement a EGL and DRM display for Rockchip VA-API driver.
>> We do have a EGL implementation in Rockchip VA-API driver, but it is
>> implemented in the standard way, we did that as a X11 display.
>>   I didn't see the usage of struct VADriverVTableEGL in gstreamer, and I have
>> no idea about where should I implement something functions like
>> eglExportDRMImageMESA().
>
> VADriverVTableEGL is deprecated in libva, we has a more efficient way to use vaapi and egl.
> You can refer to the examples in libyami-utils (https://github.com/01org/libyami-utils.git) for
> how to use vaapi and egl.
I see, thank you.
>
>>   The DRM seems more complex, the reason I want to use the DRM is that,
>> GPU would not work with the 4K video rendering, so the DRM means that
>> directly output the video into video controller in our platform. But still have no
>> idea what kind of thing I should implement in the VA-API driver. It seems that
>> the VA-API base library would open a DRM instance for the driver, but leaving
>> those configure for connector, encoder, planes to VA-API driver?
About the DRM, I have implemented a version which pretends a X output, I 
would like to know a better way.
>
> configure for connector, encoder, planes aren't a part of va-api driver.  You should check libdrm and drm/i915.
> You can refer to the test case of modetest in libdrm (git.freedesktop.org/git/mesa/drm)
>
>
>>   Could you guys give me same sample code or example of those kind of
>> display in VA-API or the documents would help(I would not image there is a
>> VA-API documents)
>>
>> --
>> Randy Li
>> The third produce department
>>
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-- 
Randy Li
The third produce department
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