DRM_FBDEV_EMULATION with 2 or more displays

DRM_FBDEV_EMULATION with 2 or more displays

[Alexander Shiyan]

Hello.

I have a question to experts of GPU/DRM subsystem.
Can I use a frame buffer for each display or subsystem involves only a
single frame buffer in emulation mode (DRM_FBDEV_EMULATION option)?
In my current configuration is created, only one frame buffer for the FIRST display (fb0).
Are there any options for creating individual framebuffers?

[drm] Initialized drm 1.1.0 20060810
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] No driver support for vblank timestamp query.
imx-drm display-subsystem: bound imx-ipuv3-crtc.2 (ops ipu_crtc_ops)
imx-drm display-subsystem: bound imx-ipuv3-crtc.3 (ops ipu_crtc_ops)
imx-drm display-subsystem: bound display@di0 (ops imx_pd_ops)
imx-drm display-subsystem: bound display@di1 (ops imx_pd_ops)
imx-drm display-subsystem: fb0:  frame buffer device
[drm] Initialized imx-drm 1.0.0 20120507 on minor 0
imx-ipuv3 40000000.ipu: IPUv3EX probed

Thanks!
---
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Re: DRM_FBDEV_EMULATION with 2 or more displays

[Alexander Shiyan]

>Среда,  6 июля 2016, 14:52 +03:00 от Alexander Shiyan <shc_work@mail.ru>:
>
>Hello.
>
>I have a question to experts of GPU/DRM subsystem.
>Can I use a frame buffer for each display or subsystem involves only a
>single frame buffer in emulation mode (DRM_FBDEV_EMULATION option)?
>In my current configuration is created, only one frame buffer for the FIRST display (fb0).
>Are there any options for creating individual framebuffers?
>
>[drm] Initialized drm 1.1.0 20060810
>[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
>[drm] No driver support for vblank timestamp query.
>imx-drm display-subsystem: bound imx-ipuv3-crtc.2 (ops ipu_crtc_ops)
>imx-drm display-subsystem: bound imx-ipuv3-crtc.3 (ops ipu_crtc_ops)
>imx-drm display-subsystem: bound display@di0 (ops imx_pd_ops)
>imx-drm display-subsystem: bound display@di1 (ops imx_pd_ops)
>imx-drm display-subsystem: fb0:  frame buffer device
>[drm] Initialized imx-drm 1.0.0 20120507 on minor 0
>imx-ipuv3 40000000.ipu: IPUv3EX probed
>
>Thanks!
>---

Can anyone answer this question?

---

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