linux-kernel - Re: [PATCH] soc: mediatek: mmsys: Fix missing UFOE component in mt8173 table routing

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Date:   Wed, 30 Jun 2021 09:30:23 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Eizan Miyamoto <eizan@...gle.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     linux-kernel@...r.kernel.org, eizan@...omium.org,
        linux-mediatek@...ts.infradead.org, drinkcat@...omium.org,
        hsinyi@...omium.org, Collabora Kernel ML <kernel@...labora.com>,
        CK Hu <ck.hu@...iatek.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] soc: mediatek: mmsys: Fix missing UFOE component in
 mt8173 table routing



On 28/06/2021 02:16, Eizan Miyamoto wrote:
> Dear Enric,
> 
> Thanks so much for your hard work bisecting and crafting this patch.
> 
> I have verified that it fixes the DRM issues we were seeing on MT8173 with
> Linux 5.12.
> 
> Tested: Eizan Miyamoto <eizan@...omium.org>
> 

Applied to v5.13-next/fixes

Thanks!

> On Fri, Jun 25, 2021 at 4:24 PM Enric Balletbo i Serra <
> enric.balletbo@...labora.com> wrote:
> 
>> The UFOE (data compression engine) component needs to be enabled to have
>> the imgtec gpu driver working. If we don't enable it we see a black screen.
>> Looks like when we switched to use and array for setting the routing
>> registers in commit 440147639ac7 ("soc: mediatek: mmsys: Use an array for
>> setting the routing registers") we missed to add this component in the new
>> routing table, it was present before taht commit, so fix it by adding
>> this component in the mt8173 routing table.
>>
>> Fixes: 440147639ac7 ("soc: mediatek: mmsys: Use an array for setting the
>> routing registers")
>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>> ---
>>
>>  drivers/soc/mediatek/mtk-mmsys.h | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/soc/mediatek/mtk-mmsys.h
>> b/drivers/soc/mediatek/mtk-mmsys.h
>> index a760a34e6eca..11388961dded 100644
>> --- a/drivers/soc/mediatek/mtk-mmsys.h
>> +++ b/drivers/soc/mediatek/mtk-mmsys.h
>> @@ -209,6 +209,9 @@ static const struct mtk_mmsys_routes
>> mmsys_default_routing_table[] = {
>>         }, {
>>                 DDP_COMPONENT_RDMA2, DDP_COMPONENT_DSI3,
>>                 DISP_REG_CONFIG_DSIO_SEL_IN, DSI3_SEL_IN_RDMA2
>> +       }, {
>> +               DDP_COMPONENT_UFOE, DDP_COMPONENT_DSI0,
>> +               DISP_REG_CONFIG_DISP_UFOE_MOUT_EN, UFOE_MOUT_EN_DSI0,
>>         }
>>  };
>>
>> --
>> 2.30.2
>>
>>
>