Hi Bjorn, On 6/7/2018 9:54 AM, Bjorn Andersson wrote: > On Wed 06 Jun 21:11 PDT 2018, Vinod wrote: > >> On 06-06-18, 09:17, Bjorn Andersson wrote: >>> On Tue 05 Jun 05:56 PDT 2018, Sricharan R wrote: >>> >>>> Hi Vinod, >>>> >>>> On 6/5/2018 11:49 AM, Vinod wrote: >>>>> On 05-06-18, 11:12, Sricharan R wrote: >>>>> >>>>>> +config QCOM_Q6V5_WCSS >>>>>> + tristate "Qualcomm Hexagon based WCSS Peripheral Image Loader" >>>>>> + depends on OF && ARCH_QCOM >>>>>> + depends on QCOM_SMEM >>>>>> + depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n) >>>>>> + depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n >>>>> >>>>> Is there a reason why it depends on RPMSG_QCOM_GLINK_SMEM=n? What would >>>>> happen if distro wants both this and RPMSG_QCOM_GLINK_SMEM >>>>> >>> >>> It says that QCOM_Q6V5_WCSS either must have a compatible state (i.e. >>> builtin vs builtin, module vs builtin, but not builtin vs module) or >>> that it's disabled, in which case we will hit the stub functions in >>> qcom_glink.h. >>> >>> I.e. this prevents QCOM_Q6V5_WCSS to be compiled builtin when >>> RPMSG_QCOM_GLINK_SMEM is module, as this would give us both stubs and >>> the module. >> >> IIUC, you want to have QCOM_Q6V5_WCSS and RPMSG_QCOM_GLINK_SMEM as >> modules or builtin >> > > RPMSG_QCOM_SMD, RPMSG_QCOM_GLINK_SMEM and QCOM_Q6V5_WCSS are all > tristate. > >> So, wouldn't Kconfig syntax something like where we say: >> M if RPMSG_QCOM_GLINK_SMEM=m >> bool if RPMSG_QCOM_GLINK_SMEM=y >> > > If we ignore SMD for a while we have the following combinations: > > glink/wcss > y y - valid > y m - valid > y n - valid > m y - link failure (invalid) > m m - valid > m n - valid > n y - valid (platform uses wcss, but not glink) > n m - valid (-----"-----) > n n - valid > > So to distill this we have the two valid cases: > module/no if RPMSG_QCOM_GLINK_SMEM=m > yes/module/no if RPMSG_QCOM_GLINK_SMEM=y > > and the way you express that in Kconfig is the somewhat awkward > > depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n > ok, Having "depends on RPMSG_QCOM_GLINK_SMEM" takes care of the first 6 cases in the above list. But just was thinking that by allowing the last three combinations, there is a chance that some config that really needs GLINK_SMEM and WCSS, but selects only Q6V5_WCSS and misses to select GLINK_SMEM, would still built and make it non-functional, right ? Regards, Sricharan >> Which makes it clear that both these have to be same type? >> > > They don't have to be of the same type, only of a compatible type. > -- "QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
