drivers: qcom: rpmh-rsc: allow active requests from wake TCS (2de4b8d3) · Commits · 戴 / test

Some RSCs may only have sleep and wake TCS, i.e, there is no dedicated TCS for active mode request, but drivers may still want to make active requests from these RSCs. In such cases re-purpose the wake TCS to send active state requests. The requirement for this is that the driver is aware that the wake TCS is being repurposed to send active request, hence the sleep and wake TCSes be invalidated before the active request is sent. Signed-off-by:

Lina Iyer <ilina@codeaurora.org> Signed-off-by:

Raju P.L.S.S.S.N <rplsssn@codeaurora.org> Reviewed-by:

Matthias Kaehlcke <mka@chromium.org> Signed-off-by:

Andy Gross <andy.gross@linaro.org>

drivers/soc/qcom/rpmh-rsc.c

+21 −2

Original line number	Diff line number	Diff line
		@@ -148,7 +148,8 @@ int rpmh_rsc_invalidate(struct rsc_drv *drv)
		static struct tcs_group get_tcs_for_msg(struct rsc_drv drv,
		const struct tcs_request *msg)
		{
		int type;
		int type, ret;
		struct tcs_group *tcs;

		switch (msg->state) {
		case RPMH_ACTIVE_ONLY_STATE:
		@@ -164,7 +165,25 @@ static struct tcs_group get_tcs_for_msg(struct rsc_drv drv,
		return ERR_PTR(-EINVAL);
		}

		return get_tcs_of_type(drv, type);
		/*
		* If we are making an active request on a RSC that does not have a
		* dedicated TCS for active state use, then re-purpose a wake TCS to
		* send active votes.
		* NOTE: The driver must be aware that this RSC does not have a
		* dedicated AMC, and therefore would invalidate the sleep and wake
		* TCSes before making an active state request.
		*/
		tcs = get_tcs_of_type(drv, type);
		if (msg->state == RPMH_ACTIVE_ONLY_STATE && IS_ERR(tcs)) {
		tcs = get_tcs_of_type(drv, WAKE_TCS);
		if (!IS_ERR(tcs)) {
		ret = rpmh_rsc_invalidate(drv);
		if (ret)
		return ERR_PTR(ret);
		}
		}

		return tcs;
		}

		static const struct tcs_request get_req_from_tcs(struct rsc_drv drv,

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