diff mbox series

[v17,6/6] soc: qcom: rpmh-rsc: Allow using free WAKE TCS for active request

Message ID 1586703004-13674-7-git-send-email-mkshah@codeaurora.org (mailing list archive)
State New, archived
Headers show
Series Invoke rpmh_flush for non OSI targets | expand

Commit Message

Maulik Shah April 12, 2020, 2:50 p.m. UTC 
When there are more than one WAKE TCS available and there is no dedicated
ACTIVE TCS available, invalidating all WAKE TCSes and waiting for current
transfer to complete in first WAKE TCS blocks using another free WAKE TCS
to complete current request.

Remove rpmh_rsc_invalidate() to happen from tcs_write() when WAKE TCSes
is re-purposed to be used for Active mode. Clear only currently used
WAKE TCS's register configuration.

Fixes: 2de4b8d33eab (drivers: qcom: rpmh-rsc: allow active requests from wake TCS)
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
---
 drivers/soc/qcom/rpmh-rsc.c | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

Comments

Stephen Boyd April 13, 2020, 9:19 p.m. UTC | #1 
Quoting Maulik Shah (2020-04-12 07:50:04)
> When there are more than one WAKE TCS available and there is no dedicated
> ACTIVE TCS available, invalidating all WAKE TCSes and waiting for current
> transfer to complete in first WAKE TCS blocks using another free WAKE TCS
> to complete current request.
> 
> Remove rpmh_rsc_invalidate() to happen from tcs_write() when WAKE TCSes
> is re-purposed to be used for Active mode. Clear only currently used
> WAKE TCS's register configuration.
> 
> Fixes: 2de4b8d33eab (drivers: qcom: rpmh-rsc: allow active requests from wake TCS)
> Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
> Reviewed-by: Douglas Anderson <dianders@chromium.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
diff mbox series

Patch

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 80e8a94..cc1293c 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -154,7 +154,7 @@  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, ret;
+	int type;
 	struct tcs_group *tcs;
 
 	switch (msg->state) {
@@ -175,19 +175,10 @@  static struct tcs_group *get_tcs_for_msg(struct rsc_drv *drv,
 	 * 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 && !tcs->num_tcs) {
+	if (msg->state == RPMH_ACTIVE_ONLY_STATE && !tcs->num_tcs)
 		tcs = get_tcs_of_type(drv, WAKE_TCS);
-		if (tcs->num_tcs) {
-			ret = rpmh_rsc_invalidate(drv);
-			if (ret)
-				return ERR_PTR(ret);
-		}
-	}
 
 	return tcs;
 }
@@ -412,8 +403,16 @@  static int tcs_write(struct rsc_drv *drv, const struct tcs_request *msg)
 
 	tcs->req[tcs_id - tcs->offset] = msg;
 	set_bit(tcs_id, drv->tcs_in_use);
-	if (msg->state == RPMH_ACTIVE_ONLY_STATE && tcs->type != ACTIVE_TCS)
+	if (msg->state == RPMH_ACTIVE_ONLY_STATE && tcs->type != ACTIVE_TCS) {
+		/*
+		 * Clear previously programmed WAKE commands in selected
+		 * repurposed TCS to avoid triggering them. tcs->slots will be
+		 * cleaned from rpmh_flush() by invoking rpmh_rsc_invalidate()
+		 */
+		write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, tcs_id, 0);
+		write_tcs_reg_sync(drv, RSC_DRV_CMD_WAIT_FOR_CMPL, tcs_id, 0);
 		enable_tcs_irq(drv, tcs_id, true);
+	}
 	spin_unlock(&drv->lock);
 
 	__tcs_buffer_write(drv, tcs_id, 0, msg);