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From: Lina Iyer <ilina@codeaurora.org>
To: andy.gross@linaro.org, david.brown@linaro.org,
	linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org
Cc: rnayak@codeaurora.org, bjorn.andersson@linaro.org,
	linux-kernel@vger.kernel.org, sboyd@kernel.org,
	evgreen@chromium.org, dianders@chromium.org,
	Lina Iyer <ilina@codeaurora.org>
Subject: [PATCH v6 10/10] drivers: qcom: rpmh-rsc: allow active requests from wake TCS
Date: Thu, 19 Apr 2018 16:16:35 -0600	[thread overview]
Message-ID: <20180419221635.17849-11-ilina@codeaurora.org> (raw)
In-Reply-To: <20180419221635.17849-1-ilina@codeaurora.org>

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>
---
 drivers/soc/qcom/rpmh-rsc.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 170d4a10275d..6a52100cd1e9 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -150,6 +150,7 @@ static struct tcs_group *get_tcs_for_msg(struct rsc_drv *drv,
 					 const struct tcs_request *msg)
 {
 	int type;
+	struct tcs_group *tcs;
 
 	switch (msg->state) {
 	case RPMH_ACTIVE_ONLY_STATE:
@@ -165,7 +166,22 @@ 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))
+			rpmh_rsc_invalidate(drv);
+	}
+
+	return tcs;
 }
 
 static const struct tcs_request *get_req_from_tcs(struct rsc_drv *drv, int m)
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

  parent reply	other threads:[~2018-04-19 22:17 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-19 22:16 [PATCH v6 00/10] drivers/qcom: add RPMH communication support Lina Iyer
2018-04-19 22:16 ` [PATCH v6 01/10] drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs Lina Iyer
2018-04-19 22:16 ` [PATCH v6 02/10] dt-bindings: introduce RPMH RSC bindings for Qualcomm SoCs Lina Iyer
2018-05-01 23:45   ` Doug Anderson
2018-05-02 14:56     ` Lina Iyer
2018-04-19 22:16 ` [PATCH v6 03/10] drivers: qcom: rpmh-rsc: log RPMH requests in FTRACE Lina Iyer
2018-04-19 22:16 ` [PATCH v6 04/10] drivers: qcom: rpmh: add RPMH helper functions Lina Iyer
2018-04-26 18:05   ` Matthias Kaehlcke
2018-04-27 16:55     ` Lina Iyer
2018-04-19 22:16 ` [PATCH v6 05/10] drivers: qcom: rpmh-rsc: write sleep/wake requests to TCS Lina Iyer
2018-04-25 21:41   ` Matthias Kaehlcke
2018-04-27 17:39     ` Lina Iyer
2018-04-27 18:40       ` Matthias Kaehlcke
2018-04-27 19:45         ` Lina Iyer
2018-04-27 20:06           ` Matthias Kaehlcke
2018-04-27 21:32             ` Lina Iyer
2018-04-27 21:54               ` Matthias Kaehlcke
2018-04-27 23:24                 ` Doug Anderson
2018-05-01 16:10                   ` Lina Iyer
2018-05-01 16:42                     ` Doug Anderson
2018-05-01 17:35                       ` Lina Iyer
2018-05-01 16:45                     ` Matthias Kaehlcke
2018-04-19 22:16 ` [PATCH v6 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS Lina Iyer
2018-04-25 22:11   ` Matthias Kaehlcke
2018-04-27 16:44     ` Lina Iyer
2018-04-27 16:54       ` Matthias Kaehlcke
2018-04-19 22:16 ` [PATCH v6 07/10] drivers: qcom: rpmh: cache sleep/wake state requests Lina Iyer
2018-04-19 22:16 ` [PATCH v6 08/10] drivers: qcom: rpmh: allow requests to be sent asynchronously Lina Iyer
2018-04-19 22:16 ` [PATCH v6 09/10] drivers: qcom: rpmh: add support for batch RPMH request Lina Iyer
2018-04-25 23:41   ` Matthias Kaehlcke
2018-04-27 16:24     ` Lina Iyer
2018-04-19 22:16 ` Lina Iyer [this message]
2018-04-26  1:14   ` [PATCH v6 10/10] drivers: qcom: rpmh-rsc: allow active requests from wake TCS Matthias Kaehlcke

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