Re: [PATCH] dt-bindings: ti-serdes-mux: Add defines for SERDES4 in J784S4 SoC

On 11/07/23 13:05, Krzysztof Kozlowski wrote:

On 11/07/2023 09:21, Jayesh Choudhary wrote:

quoted

On 11/07/23 11:34, Krzysztof Kozlowski wrote:

quoted

On 11/07/2023 07:55, Jayesh Choudhary wrote:

quoted

Hello Krzysztof,

On 10/07/23 17:11, Krzysztof Kozlowski wrote:

quoted

On 10/07/2023 12:27, Jayesh Choudhary wrote:

quoted

SERDES4 has 4 lanes. Add lane definitions for it.

Signed-off-by: Jayesh Choudhary <redacted>
---
    include/dt-bindings/mux/ti-serdes.h | 20 ++++++++++++++++++++

Where are the users of this binding constants? IOW, why do you need to
add these?

I don't see users of existing constants either...

These constants are propagated in the idle-state property for the
mux-controller node (named serdes_ln_ctrl) usually in the final
board dts files and occasionally in the main dtsi files for TI SoCs.

So they are not used.

'They' as in SERDES4 definition or others as well??

I made quick greps and it seems that none of the defines - existing and
new - are used. But here anyway we talk about this patch, which without
users does not have any rationale.

These defines are yet to be added. For reference:
https://lore.kernel.org/all/20230522092201.127598-3-s-vadapalli@ti.com/ (local)

SERDES4 by default is used for display but it can be configured for 
QSGMII too. There are users for that configuration as well. So it felt 
reasonable to add the definitions for SERDES4 which were missed earlier.

Warm Regards,
-Jayesh