Re: [PATCH] slimbus: qcom-ngd-ctrl: match downstream DEF_ACT_CHAN encoding

[Konrad Dybcio]

On 8/8/26 2:35 AM, Casey Tunturi via B4 Relay wrote:
> From: Casey Tunturi <casey@xxxxxxxxxxxxxxxxxxxxxx>
> 
> During my investigations, and some rather incessant cross-checking of
> blueline's SLIMbus path, I found that Qualcomm's downstream driver
> packs the first DEF_ACT_CHAN byte differently from mainline. Bits [7:5]
> hold the data format; bits [4:0] hold the five-bit client number.
> 
> I changed ours to match. It made no immediate difference on my own
> hardware: blueline's current values produce 0x0f either way. The
> downstream layout is correct and should help devices that use upper
> logical-address bits or a non-zero data format.
> 
> Fixes: 52490169cddf ("slimbus: ngd: add stream support")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Casey Tunturi <casey@xxxxxxxxxxxxxxxxxxxxxx>
> ---

The semantics match, I don't know what side effects that may uncover

Acked-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad