On 04/03/2024 21:21, Dmitry Baryshkov wrote: > On Mon, 4 Mar 2024 at 22:17, Conor Dooley <co...@kernel.org> wrote: >> >> On Mon, Mar 04, 2024 at 09:59:13PM +0200, Dmitry Baryshkov wrote: >>> On Mon, 4 Mar 2024 at 21:46, Conor Dooley <co...@kernel.org> wrote: >>>> On Mon, Mar 04, 2024 at 09:37:00PM +0200, Dmitry Baryshkov wrote: >>>>> On Mon, 4 Mar 2024 at 21:34, Conor Dooley <co...@kernel.org> wrote: >>>>>> On Mon, Mar 04, 2024 at 05:21:37PM +0100, Marc Gonzalez wrote: >> >>>>>>> Thus, anyone porting an msm8998 board to mainline would automatically >>>>>>> get the work-around, without having to hunt down the feature bit, >>>>>>> and tweak the FW files. >>>>>> >>>>>> How come the root node comes into this, don't you have a soc-specific >>>>>> compatible for the integration on this SoC? >>>>> >>>>> No. Ath10k uses WiFi SoC as an SoC designator rather than the main SoC. >>>> >>>> Suitability of either fix aside, can you explain this to me? Is the "WiFi >>>> SoC" accessible from the "main SoC" at a regular MMIO address? The >>>> "ath10k" compatible says it is SDIO-based & the other two compatibles >>>> seem to be MMIO. >>> >>> Yes, this is correct. MSM8996 uses PCI to access WiFi chip, MSM8998 uses >>> MMIO. >> >> Thanks. >> >> A SoC-specific compatible sounds like it would be suitable in that case >> then, to deal with integration quirks for that specific SoC? I usually >> leave the ins and outs of these qcom SoCs to Krzysztof, but I can't help >> but wanna know what the justification is here for not using one. > > We can probably start with "historically established" here. From the > hardware point of view msm8998, sdm845 and several other chipsets use > a variant of the same wcn3990 WiFi+BT chip. The actual issue is in the > DSP firmware, so it can be handled via the firmware-related means. >
The WiFi+BT chips are separate products, so they are not usually considered part of the SoC, even though they can be integrated into the SoC like here. I guess correct approach would be to add SoC-specific compatible for them. Best regards, Krzysztof
