# Re: \[PATCH\] soc: mediatek: mmsys: Fix missing UFOE component in mt8173 table routing

- From: Matthias Brugger \<matthias.bgg@gmail.com\>
- Date: 2021-06-30 07:30:35 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/06/1429522
- Thread: https://ratatoskr.run/linux-mediatek/2021/06/1429522/t.md

```text


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 [ref]
> 

Applied to v5.13-next/fixes

Thanks!

> On Fri, Jun 25, 2021 at 4:24 PM Enric Balletbo i Serra <
> enric.balletbo@collabora.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 <redacted>
>> ---
>>
>>  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
>>
>>
> 

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