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From: Fenglin Wu <quic_fenglinw@quicinc.com>
To: <linux-arm-msm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<sboyd@kernel.org>
Cc: <collinsd@codeaurora.org>, <subbaram@codeaurora.org>,
	<quic_fenglinw@quicinc.com>
Subject: [PATCH V1 5/9] spmi: pmic-arb: correct duplicate APID to PPID mapping logic
Date: Fri, 20 Aug 2021 12:58:00 +0800	[thread overview]
Message-ID: <1629435488-10228-6-git-send-email-quic_fenglinw@quicinc.com> (raw)
In-Reply-To: <1629435488-10228-1-git-send-email-quic_fenglinw@quicinc.com>

From: David Collins <collinsd@codeaurora.org>

Correct the way that duplicate PPID mappings are handled for PMIC
arbiter v5.  The final APID mapped to a given PPID should be the
one which has write owner = APPS EE, if it exists, or if not
that, then the first APID mapped to the PPID, if it exists.

Signed-off-by: David Collins <collinsd@codeaurora.org>
Signed-off-by: Fenglin Wu <quic_fenglinw@quicinc.com>
---
 drivers/spmi/spmi-pmic-arb.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 59c445b..f1b72d8 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -918,7 +918,8 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
 	 * version 5, there is more than one APID mapped to each PPID.
 	 * The owner field for each of these mappings specifies the EE which is
 	 * allowed to write to the APID.  The owner of the last (highest) APID
-	 * for a given PPID will receive interrupts from the PPID.
+	 * which has the IRQ owner bit set for a given PPID will receive
+	 * interrupts from the PPID.
 	 */
 	for (i = 0; ; i++, apidd++) {
 		offset = pmic_arb->ver_ops->apid_map_offset(i);
@@ -941,16 +942,16 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
 		apid = pmic_arb->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
 		prev_apidd = &pmic_arb->apid_data[apid];
 
-		if (valid && is_irq_ee &&
-				prev_apidd->write_ee == pmic_arb->ee) {
+		if (!valid || apidd->write_ee == pmic_arb->ee) {
+			/* First PPID mapping or one for this EE */
+			pmic_arb->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
+		} else if (valid && is_irq_ee &&
+			   prev_apidd->write_ee == pmic_arb->ee) {
 			/*
 			 * Duplicate PPID mapping after the one for this EE;
 			 * override the irq owner
 			 */
 			prev_apidd->irq_ee = apidd->irq_ee;
-		} else if (!valid || is_irq_ee) {
-			/* First PPID mapping or duplicate for another EE */
-			pmic_arb->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
 		}
 
 		apidd->ppid = ppid;
-- 
Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.


  parent reply	other threads:[~2021-08-20  4:58 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-20  4:57 [PATCH V1 0/9] A bunch of fix and optimization patches in spmi-pmic-arb.c Fenglin Wu
2021-08-20  4:57 ` [PATCH V1 1/9] spmi: pmic-arb: add a print in cleanup_irq Fenglin Wu
2021-08-20  4:57 ` [PATCH V1 2/9] spmi: pmic-arb: do not ack and clear peripheral interrupts " Fenglin Wu
2021-08-20  4:57 ` [PATCH V1 3/9] spmi: pmic-arb: check apid against limits before calling irq handler Fenglin Wu
2021-08-20  4:57 ` [PATCH V1 4/9] spmi: pmic-arb: add support to dispatch interrupt based on IRQ status Fenglin Wu
2021-08-20  4:58 ` Fenglin Wu [this message]
2021-08-20  4:58 ` [PATCH V1 6/9] spmi: pmic-arb: block access for invalid PMIC arbiter v5 SPMI writes Fenglin Wu
2021-08-20  4:58 ` [PATCH V1 7/9] spmi: pmic-arb: support updating interrupt type flags Fenglin Wu
2021-08-20  4:58 ` [PATCH V1 8/9] spmi: pmic-arb: make interrupt support optional Fenglin Wu
2021-08-20  4:58 ` [PATCH V1 9/9] spmi: pmic-arb: increase SPMI transaction timeout delay Fenglin Wu
  -- strict thread matches above, loose matches on Subject: below --
2021-07-29  1:12 [PATCH V1 0/9] A bunch of fix and optimization patches in spmi-pmic-arb.c Fenglin Wu
2021-07-29  1:12 ` [PATCH V1 5/9] spmi: pmic-arb: correct duplicate APID to PPID mapping logic Fenglin Wu

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