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<div class="moz-cite-prefix">Hi Rex,<br>
<br>
So amd_vce_state is our hardware representation and <span
lang="EN-US">drm_amdgpu_info_vce_clock_table is the IOCTL
interface structure? Is there a reason for not using
drm_amdgpu_info_vce_clock_table directly in the hw manager,
except that we don't want to include the IOCTL interface here?<br>
<br>
Cause that would at least be a bit awkward, this is an extra
abstraction layer we usually try to avoid upstream.<br>
<br>
I'm fine with this approach for this use case, but when we get
more and more power management exposed to userspace this could
raise objections cause this essentially means we need to
duplicate all internal power management structures for the
public interface again.<br>
<br>
Regards,<br>
Christian. <br>
</span><br>
Am 12.10.2016 um 11:40 schrieb Zhu, Rex:<br>
</div>
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<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Hi Christian,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">I mean patch 5 can be changed as
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">static struct
amd_vce_state* pp_dpm_get_vce_clock_table(void *handle,
int num)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">{<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> PP_CHECK((struct
pp_instance *)handle);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> hwmgr = ((struct
pp_instance *)handle)->hwmgr;<o:p></o:p></span></p>
<pre style="text-indent:18.0pt"><span lang="EN-US">if (hwmgr && num < hwmgr->num_vce_state_tables)<o:p></o:p></span></pre>
<pre style="text-indent:18.0pt"><span lang="EN-US"> return &hwmgr->vce_states[i];<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Return NULL;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">}</span><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">And in Patch6.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">+ case
AMDGPU_INFO_VCE_CLOCK_TABLE: {<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">+
struct drm_amdgpu_info_vce_clock_table vce_clk_table = {};<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"> <span
style="color:#C00000">
struct amd_vce_state* vce_state;</span><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<pre><span lang="EN-US">+ for (i = 0; i < AMDGPU_VCE_CLOCK_TABLE_ENTRIES; i++) {<o:p></o:p></span></pre>
<p class="MsoPlainText"><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"> <span
style="color:#C00000">vce_state</span> =
amdgpu_dpm_get_vce_clock_table(adev,
<span style="color:#C00000">i</span>);<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#C00000" lang="EN-US">
If (vce_state) {<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Courier
New";color:#C00000" lang="EN-US"> </span><span
style="color:#C00000" lang="EN-US">
vce_clk_table.entries[i].sclk
= vce_state->sclk;<br>
</span><span style="font-family:"Courier
New";color:#C00000" lang="EN-US"> </span><span
style="color:#C00000" lang="EN-US">
vce_clk_table.entries[i].mclk = vce_state->mclk;<br>
</span><span style="font-family:"Courier
New";color:#C00000" lang="EN-US"> </span><span
style="color:#C00000" lang="EN-US">
vce_clk_table.entries[i].eclk = vce_state->evclk;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#C00000" lang="EN-US">
} else {<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#C00000" lang="EN-US">
vce_clk_table.num_of_entries = i;
//if UMD driver need to check number of vce state.<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#C00000" lang="EN-US">
break;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#C00000" lang="EN-US">
}<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">+
return copy_to_user(out, &vce_clk_table,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">+
min((size_t)size, sizeof(vce_clk_table))) ? -EFAULT : 0;<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">+ }<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Best Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Rex<o:p></o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US"> amd-gfx
[<a class="moz-txt-link-freetext" href="mailto:amd-gfx-bounces@lists.freedesktop.org">mailto:amd-gfx-bounces@lists.freedesktop.org</a>]
<b>On Behalf Of </b>Christian König<br>
<b>Sent:</b> Wednesday, October 12, 2016 4:53 PM<br>
<b>To:</b> Zhu, Rex; Alex Deucher; amd-gfx list; Fang,
Peter; Zhang, Boyuan<br>
<b>Cc:</b> Deucher, Alexander<br>
<b>Subject:</b> Re: [PATCH 5/6] drm/amdgpu/powerplay:
add an implementation for get_vce_clock_table<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US">Hi Rex,<br>
<br>
the problem with this approach is that you need to copy
the entries from one structure to another, like we have
below:<br>
<br>
> +
vce_clk_table.entries[i].sclk =
hwmgr->vce_states[i].sclk;<br>
> +
vce_clk_table.entries[i].mclk =
hwmgr->vce_states[i].mclk;<br>
> +
vce_clk_table.entries[i].eclk =
hwmgr->vce_states[i].evclk;<br>
<br>
This is not seen as good coding practice and usually isn't
allowed upstream because it creates two representations in
the kernel for the same thing.<br>
<br>
Regards,<br>
Christian.<br>
<br>
Am 12.10.2016 um 10:34 schrieb Zhu, Rex:<o:p></o:p></span></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<pre><span lang="EN-US">Hi Alex,<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">In Patch1, I moved struct amdgpu_vce_states to amd_shared.h from amdgpu.h. So in powerplay, we used same vce state definition.<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">So the define of static struct drm_amdgpu_info_vce_clock_table pp_dpm_get_vce_clock_table(void *handle)<o:p></o:p></span></pre>
<pre><span lang="EN-US">Can change to <o:p></o:p></span></pre>
<pre><span lang="EN-US">static struct amd_vce_state pp_dpm_get_vce_clock_table(void *handle, int num);<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">and can move those codes to Patch6.<o:p></o:p></span></pre>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<pre><span lang="EN-US">+ vce_clk_table.entries[i].sclk = hwmgr->vce_states[i].sclk;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ vce_clk_table.entries[i].mclk = hwmgr->vce_states[i].mclk;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ vce_clk_table.entries[i].eclk = hwmgr->vce_states[i].evclk;<o:p></o:p></span></pre>
</blockquote>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">So in powerplay and dpm, we don't need to visit struct drm_amdgpu_info_vce_clock_table.<o:p></o:p></span></pre>
<pre><span lang="EN-US"> <o:p></o:p></span></pre>
<pre><span lang="EN-US">In Patch2, add numer of vce_states in struct dpm. If it is useful to UMD driver. We can notify UMD by add a member in struct drm_amdgpu_info_vce_clock_table.<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">Best Regards<o:p></o:p></span></pre>
<pre><span lang="EN-US">Rex<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">-----Original Message-----<o:p></o:p></span></pre>
<pre><span lang="EN-US">From: Alex Deucher [<a moz-do-not-send="true" href="mailto:alexdeucher@gmail.com">mailto:alexdeucher@gmail.com</a>] <o:p></o:p></span></pre>
<pre><span lang="EN-US">Sent: Wednesday, October 12, 2016 4:07 AM<o:p></o:p></span></pre>
<pre><span lang="EN-US">To: amd-gfx list; Fang, Peter; Zhang, Boyuan; Zhu, Rex<o:p></o:p></span></pre>
<pre><span lang="EN-US">Cc: Deucher, Alexander<o:p></o:p></span></pre>
<pre><span lang="EN-US">Subject: Re: [PATCH 5/6] drm/amdgpu/powerplay: add an implementation for get_vce_clock_table<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">Rex what is your opinion on exposing the amdgpu drm structure through to powerplay? We could do an intermediate interface, but that just seems like extra hoops to jump through for pretty questionable gain.<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">Alex<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">On Fri, Oct 7, 2016 at 2:28 PM, Alex Deucher <a moz-do-not-send="true" href="mailto:alexdeucher@gmail.com"><alexdeucher@gmail.com></a> wrote:<o:p></o:p></span></pre>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<pre><span lang="EN-US">Used by the powerplay dpm code.<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">Signed-off-by: Alex Deucher <a moz-do-not-send="true" href="mailto:alexander.deucher@amd.com"><alexander.deucher@amd.com></a><o:p></o:p></span></pre>
<pre><span lang="EN-US">---<o:p></o:p></span></pre>
<pre><span lang="EN-US"> drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 24 <o:p></o:p></span></pre>
<pre><span lang="EN-US">++++++++++++++++++++++++<o:p></o:p></span></pre>
<pre><span lang="EN-US"> 1 file changed, 24 insertions(+)<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c <o:p></o:p></span></pre>
<pre><span lang="EN-US">b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c<o:p></o:p></span></pre>
<pre><span lang="EN-US">index bb8a345..8eee390 100644<o:p></o:p></span></pre>
<pre><span lang="EN-US">--- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c<o:p></o:p></span></pre>
<pre><span lang="EN-US">+++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c<o:p></o:p></span></pre>
<pre><span lang="EN-US">@@ -30,6 +30,7 @@<o:p></o:p></span></pre>
<pre><span lang="EN-US"> #include "power_state.h"<o:p></o:p></span></pre>
<pre><span lang="EN-US"> #include "eventmanager.h"<o:p></o:p></span></pre>
<pre><span lang="EN-US"> #include "pp_debug.h"<o:p></o:p></span></pre>
<pre><span lang="EN-US">+#include "drm/amdgpu_drm.h"<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US"> #define PP_CHECK(handle) \<o:p></o:p></span></pre>
<pre><span lang="EN-US">@@ -821,6 +822,28 @@ static int pp_dpm_read_sensor(void *handle, int idx, int32_t *value)<o:p></o:p></span></pre>
<pre><span lang="EN-US"> return hwmgr->hwmgr_func->read_sensor(hwmgr, idx, value); }<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US">+static struct drm_amdgpu_info_vce_clock_table <o:p></o:p></span></pre>
<pre><span lang="EN-US">+pp_dpm_get_vce_clock_table(void *handle) {<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ struct drm_amdgpu_info_vce_clock_table vce_clk_table = {};<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ struct pp_hwmgr *hwmgr;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ unsigned i;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ if (handle) {<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ hwmgr = ((struct pp_instance *)handle)->hwmgr;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ if (hwmgr) {<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ for (i = 0; i < AMDGPU_VCE_CLOCK_TABLE_ENTRIES; i++) {<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ vce_clk_table.entries[i].sclk = hwmgr->vce_states[i].sclk;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ vce_clk_table.entries[i].mclk = hwmgr->vce_states[i].mclk;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ vce_clk_table.entries[i].eclk = hwmgr->vce_states[i].evclk;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ }<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ }<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ }<o:p></o:p></span></pre>
<pre><span lang="EN-US">+<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ return vce_clk_table;<o:p></o:p></span></pre>
<pre><span lang="EN-US">+}<o:p></o:p></span></pre>
<pre><span lang="EN-US">+<o:p></o:p></span></pre>
<pre><span lang="EN-US"> const struct amd_powerplay_funcs pp_dpm_funcs = {<o:p></o:p></span></pre>
<pre><span lang="EN-US"> .get_temperature = pp_dpm_get_temperature,<o:p></o:p></span></pre>
<pre><span lang="EN-US"> .load_firmware = pp_dpm_load_fw, @@ -847,6 +870,7 @@ const <o:p></o:p></span></pre>
<pre><span lang="EN-US">struct amd_powerplay_funcs pp_dpm_funcs = {<o:p></o:p></span></pre>
<pre><span lang="EN-US"> .get_mclk_od = pp_dpm_get_mclk_od,<o:p></o:p></span></pre>
<pre><span lang="EN-US"> .set_mclk_od = pp_dpm_set_mclk_od,<o:p></o:p></span></pre>
<pre><span lang="EN-US"> .read_sensor = pp_dpm_read_sensor,<o:p></o:p></span></pre>
<pre><span lang="EN-US">+ .get_vce_clock_table = pp_dpm_get_vce_clock_table,<o:p></o:p></span></pre>
<pre><span lang="EN-US"> };<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<pre><span lang="EN-US"> static int amd_pp_instance_init(struct amd_pp_init *pp_init,<o:p></o:p></span></pre>
<pre><span lang="EN-US">--<o:p></o:p></span></pre>
<pre><span lang="EN-US">2.5.5<o:p></o:p></span></pre>
<pre><span lang="EN-US"><o:p> </o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US"><br>
<br>
<br>
<o:p></o:p></span></p>
<pre><span lang="EN-US">_______________________________________________<o:p></o:p></span></pre>
<pre><span lang="EN-US">amd-gfx mailing list<o:p></o:p></span></pre>
<pre><span lang="EN-US"><a moz-do-not-send="true" href="mailto:amd-gfx@lists.freedesktop.org">amd-gfx@lists.freedesktop.org</a><o:p></o:p></span></pre>
<pre><span lang="EN-US"><a moz-do-not-send="true" href="https://lists.freedesktop.org/mailman/listinfo/amd-gfx">https://lists.freedesktop.org/mailman/listinfo/amd-gfx</a><o:p></o:p></span></pre>
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<pre wrap="">_______________________________________________
amd-gfx mailing list
<a class="moz-txt-link-abbreviated" href="mailto:amd-gfx@lists.freedesktop.org">amd-gfx@lists.freedesktop.org</a>
<a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/amd-gfx">https://lists.freedesktop.org/mailman/listinfo/amd-gfx</a>
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