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<p>agreed, why not just use cpu to clear it ? is it because performance ?<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>发件人:</b> Michel Dänzer <michel@daenzer.net><br>
<b>发送时间:</b> 2017年2月8日 23:52:02<br>
<b>收件人:</b> Christian König; Liu, Monk<br>
<b>抄送:</b> amd-gfx@lists.freedesktop.org<br>
<b>主题:</b> Re: 答复: [PATCH] drm/amdgpu:fix amdgpu_sa_bo_new error</font>
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<div class="PlainText">On 09/02/17 12:30 AM, Christian König wrote:<br>
> The IB test make the decision if the hardware is working or not.<br>
> <br>
> So they should be the first commands (except for the ring tests) we send<br>
> to the hardware.<br>
> <br>
> When we allocate the fb before the test we send the clear command to the<br>
> hardware without knowing if the hardware really works or not.<br>
> <br>
> Not a big issue, but I think the order makes more sense that way.<br>
<br>
I just wonder if it's worth all the trouble, just to clear the fbcon<br>
buffer[0], if the result is that the console output is delayed, possibly<br>
indefinitely.<br>
<br>
[0] We don't have any other hardware acceleration for fbcon, so its BO<br>
is only accessed by the CPU and display hardware after this, and has to<br>
be pinned in the CPU visible area of VRAM at all times anyway.<br>
<br>
<br>
-- <br>
Earthling Michel Dänzer | <a href="http://www.amd.com">
http://www.amd.com</a><br>
Libre software enthusiast | Mesa and X developer<br>
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