linux-kernel - Re: [PATCH v6 04/11] drm/msm: Add CONTEXT_SWITCH

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Message-ID: <8805a597-813e-49e5-82da-69ad15249601@gmail.com>
Date: Fri, 27 Sep 2024 17:01:05 +0200
From: Antonino Maniscalco <antomani103@...il.com>
To: Connor Abbott <cwabbott0@...il.com>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Abhinav Kumar <quic_abhinavk@...cinc.com>,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Marijn Suijten <marijn.suijten@...ainline.org>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 Jonathan Corbet <corbet@....net>, linux-arm-msm@...r.kernel.org,
 dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
 Neil Armstrong <neil.armstrong@...aro.org>
Subject: Re: [PATCH v6 04/11] drm/msm: Add CONTEXT_SWITCH_CNTL bitfields

On 9/27/24 1:57 PM, Connor Abbott wrote:
> In the future, the right thing to do is open a mesa MR with just the
> register changes and then copy the file from mesa once it's merged,
> because all of the XML files are supposed to flow from mesa to keep
> mesa and the kernel in sync. I've opened a mesa MR [1] based on this
> that will hopefully get quickly acked and merged.
> 
> Connor

Sure I'll keep that in mind, thanks!

> 
> [1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31422
> 
> On Thu, Sep 26, 2024 at 10:17 PM Antonino Maniscalco
> <antomani103@...il.com> wrote:
>>
>> Add missing bitfields to CONTEXT_SWITCH_CNTL in a6xx.xml.
>>
>> Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on SM8650-QRD
>> Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on SM8550-QRD
>> Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on SM8450-HDK
>> Signed-off-by: Antonino Maniscalco <antomani103@...il.com>
>> ---
>>   drivers/gpu/drm/msm/registers/adreno/a6xx.xml | 7 ++++++-
>>   1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/msm/registers/adreno/a6xx.xml b/drivers/gpu/drm/msm/registers/adreno/a6xx.xml
>> index 2dfe6913ab4f52449b76c2f75b2d101c08115d16..fd31d1d7a11eef7f38dcc2975dc1034f6b7a2e41 100644
>> --- a/drivers/gpu/drm/msm/registers/adreno/a6xx.xml
>> +++ b/drivers/gpu/drm/msm/registers/adreno/a6xx.xml
>> @@ -1337,7 +1337,12 @@ to upconvert to 32b float internally?
>>                  <reg32 offset="0x0" name="REG" type="a6x_cp_protect"/>
>>          </array>
>>
>> -       <reg32 offset="0x08A0" name="CP_CONTEXT_SWITCH_CNTL"/>
>> +       <reg32 offset="0x08A0" name="CP_CONTEXT_SWITCH_CNTL">
>> +               <bitfield name="STOP" pos="0" type="boolean"/>
> 
> This bit isn't set to 1 when it's stopped, it's set to
> 
>> +               <bitfield name="LEVEL" low="6" high="7"/>
>> +               <bitfield name="USES_GMEM" pos="8" type="boolean"/>
>> +               <bitfield name="SKIP_SAVE_RESTORE" pos="9" type="boolean"/>
>> +       </reg32>
>>          <reg64 offset="0x08A1" name="CP_CONTEXT_SWITCH_SMMU_INFO"/>
>>          <reg64 offset="0x08A3" name="CP_CONTEXT_SWITCH_PRIV_NON_SECURE_RESTORE_ADDR"/>
>>          <reg64 offset="0x08A5" name="CP_CONTEXT_SWITCH_PRIV_SECURE_RESTORE_ADDR"/>
>>
>> --
>> 2.46.1
>>


Best regards,
-- 
Antonino Maniscalco <antomani103@...il.com>