<div dir="ltr"><br><div class="gmail_extra"><div class="gmail_quote">On Thu, Jul 19, 2018 at 11:14 AM, Zhu, Rex <span dir="ltr"><<a href="mailto:Rex.Zhu@amd.com" target="_blank">Rex.Zhu@amd.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div id="m_-5529052118359428029divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif" dir="ltr"><span class="">
<p style="margin-top:0;margin-bottom:0"><span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:14.6667px">>We also need to power
it back up in hw_fini and suspend and then power</span><br style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:14.6667px">
<span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:14.6667px">>it back down in resume.</span><br>
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Yes, this logic will be added in acp block.
<div>In this patch, we only power down acp when it was not used and have no inpact wen s3.</div></div></div></blockquote><div><br></div><div>But I think when the asic comes out of S3/S4, the ACP block will be powered up again so it will have to be powered down again to avoid using power after resume. So if the platform uses AZ rather than ACP, we need to handle that case and to power ACP back up on hw_fini() in case the driver gets reloaded. S4 works similarly. Something like the attached patch.<br></div><div><br></div><div>Alex<br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div id="m_-5529052118359428029divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif" dir="ltr">
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<div>Best Regards</div>
<div>Rex<br>
<br>
<div style="color:rgb(0,0,0)">
<hr style="display:inline-block;width:98%">
<div id="m_-5529052118359428029divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Alex Deucher <<a href="mailto:alexdeucher@gmail.com" target="_blank">alexdeucher@gmail.com</a>><br>
<b>Sent:</b> Thursday, July 19, 2018 9:56 PM<br>
<b>To:</b> Zhu, Rex<br>
<b>Cc:</b> amd-gfx list<br>
<b>Subject:</b> Re: [PATCH 2/2] drm/amdgpu: Power down acp if board uses AZ</font>
<div> </div>
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<div class="m_-5529052118359428029PlainText"><div><div class="h5">On Thu, Jul 19, 2018 at 4:46 AM, Rex Zhu <<a href="mailto:rex.zhu@amd.com" target="_blank">rex.zhu@amd.com</a>> wrote:<br>
> if board uses AZ rather than ACP, we power down acp<br>
> through smu to save power.<br>
><br>
<br>
We also need to power it back up in hw_fini and suspend and then power<br>
it back down in resume.<br>
<br>
Alex<br>
<br>
> Signed-off-by: Rex Zhu <<a href="mailto:Rex.Zhu@amd.com" target="_blank">Rex.Zhu@amd.com</a>><br>
> ---<br>
> drivers/gpu/drm/amd/amdgpu/<wbr>amdgpu_acp.c | 8 +++++---<br>
> 1 file changed, 5 insertions(+), 3 deletions(-)<br>
><br>
> diff --git a/drivers/gpu/drm/amd/amdgpu/<wbr>amdgpu_acp.c b/drivers/gpu/drm/amd/amdgpu/<wbr>amdgpu_acp.c<br>
> index 71efcf3..4e18a88 100644<br>
> --- a/drivers/gpu/drm/amd/amdgpu/<wbr>amdgpu_acp.c<br>
> +++ b/drivers/gpu/drm/amd/amdgpu/<wbr>amdgpu_acp.c<br>
> @@ -35,6 +35,7 @@<br>
><br>
> #include "acp_gfx_if.h"<br>
><br>
> +<br>
> #define ACP_TILE_ON_MASK <wbr> 0x03<br>
> #define ACP_TILE_OFF_MASK <wbr> 0x02<br>
> #define ACP_TILE_ON_RETAIN_REG_MASK <wbr> 0x1f<br>
> @@ -289,11 +290,12 @@ static int acp_hw_init(void *handle)<br>
> r = amd_acp_hw_init(adev->acp.cgs_<wbr>device,<br>
> ip_block->version->major, ip_block->version->minor);<br>
> /* -ENODEV means board uses AZ rather than ACP */<br>
> - if (r == -ENODEV)<br>
> + if (r == -ENODEV) {<br>
> + amdgpu_dpm_set_powergating_by_<wbr>smu(adev, AMD_IP_BLOCK_TYPE_ACP, true);<br>
> return 0;<br>
> - else if (r)<br>
> + } else if (r) {<br>
> return r;<br>
> -<br>
> + }<br>
> if (adev->rmmio_size == 0 || adev->rmmio_size < 0x5289)<br>
> return -EINVAL;<br>
><br>
> --<br>
> 1.9.1<br>
><br>
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