Re: [PATCH v1 1/3] arm64: dts: qcom: sa8775p-ride: Change the BT node

["Cheng Jiang (IOE)" <quic_chejiang@quicinc.com>]

Hi Krzysztof,

On 11/28/2024 10:39 PM, Krzysztof Kozlowski wrote:
> On 28/11/2024 13:09, Cheng Jiang wrote:
>> The SA8775P-Ride uses the QCA6698 chipset, which shares the same IP core
>> as the WCN6855. However, it has different RF components and RAM sizes,
>> so new firmware is needed.  This change allows driver to distinguish it
>> from the WCN6855 and load the specific firmware.
>>
>> Signed-off-by: Cheng Jiang <quic_chejiang@quicinc.com>
>> ---
>>  arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi b/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
>> index 3fc62e123..f95e709bd 100644
>> --- a/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
>> @@ -856,7 +856,7 @@ &uart17 {
>>  	status = "okay";
>>  
>>  	bluetooth {
>> -		compatible = "qcom,wcn6855-bt";
>> +		compatible = "qcom,qca6698-bt";
> 
> This breaks users without mentioning it, without really justifying the
> impact. Also it is not clear for me whether devices are or are not
> compatible.
QCA6698 can use the wcn6855 firmware, but the performance is not good as expect. 
To avoid breaking existing projects, we plan to upstream a new firmware for this
chip. 
If use the 'firmware-name' to specify the firmware, we can keep the compatible
here unchanged. Is it OK?
> 
> Best regards,
> Krzysztof