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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I just started to work with Wayland/Weston, so please forgive me if I ask silly questions.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m running Weston (8.0.0) on a custom ARM SoC using the DRM backend. As the OpenGL
<o:p></o:p></p>
<p class="MsoNormal">driver is not (yet) adapted for Wayland, I'm running Weston using the '--use-pixman' option.<o:p></o:p></p>
<p class="MsoNormal">This works fine so far.<o:p></o:p></p>
<p class="MsoNormal">As our DRM/KMS driver supports several HW planes, I was debugging into the Weston<o:p></o:p></p>
<p class="MsoNormal">code trying to understand how Weston makes use of these HW planes (or what needs<o:p></o:p></p>
<p class="MsoNormal">to be done to get Weston use the HW planes). If I understand the code correctly:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">drm_fb_get_from_view()<o:p></o:p></p>
<p class="MsoNormal">{<o:p></o:p></p>
<p class="MsoNormal"> ...<o:p></o:p></p>
<p class="MsoNormal"> if (wl_shm_buffer_get(buffer->resource))<o:p></o:p></p>
<p class="MsoNormal"> return NULL;<o:p></o:p></p>
<p class="MsoNormal"> ...<o:p></o:p></p>
<p class="MsoNormal">}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Weston will never use HW planes for wl_shm_buffer, only for GBM or dmabuf type<o:p></o:p></p>
<p class="MsoNormal">buffer it will be used.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">- Is this correct? What is the reason for this?<o:p></o:p></p>
<p class="MsoNormal">- Any suggestions how to get HW planes used without OpenGL rendering?<o:p></o:p></p>
<p class="MsoNormal"> Currently I think of patching Weston or implement a Weston client that<o:p></o:p></p>
<p class="MsoNormal"> uses dmabuf buffer. Any hint is appreciated that puts me on the most<o:p></o:p></p>
<p class="MsoNormal"> promising path.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Oliver<o:p></o:p></p>
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