linux-kernel - [PATCH 2/8] remoteproc: qcom_q6v5_mss: Handle platforms with only single power domain

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Message-Id: <20230112202612.791455-3-matti.lehtimaki@gmail.com>
Date:   Thu, 12 Jan 2023 22:26:05 +0200
From:   Matti Lehtimäki <matti.lehtimaki@...il.com>
To:     linux-arm-msm@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Luca Weiss <luca@...tu.xyz>,
        Matti Lehtimäki <matti.lehtimaki@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/8] remoteproc: qcom_q6v5_mss: Handle platforms with only single power domain

From: Luca Weiss <luca@...tu.xyz>

For example MSM8226 has only one power domain (cx) which is attached
internally in power domain and cannot be attached in this driver.

Signed-off-by: Luca Weiss <luca@...tu.xyz>
Signed-off-by: Matti Lehtimäki <matti.lehtimaki@...il.com>
---
 drivers/remoteproc/qcom_q6v5_mss.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 2f4027664a0e..745627a36bcf 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1820,6 +1820,13 @@ static int q6v5_pds_attach(struct device *dev, struct device **devs,
 	if (!pd_names)
 		return 0;
 
+	/* Handle single power domain */
+	if (dev->pm_domain) {
+		devs[0] = dev;
+		pm_runtime_enable(dev);
+		return 1;
+	}
+
 	while (pd_names[num_pds])
 		num_pds++;
 
@@ -1843,8 +1850,15 @@ static int q6v5_pds_attach(struct device *dev, struct device **devs,
 static void q6v5_pds_detach(struct q6v5 *qproc, struct device **pds,
 			    size_t pd_count)
 {
+	struct device *dev = qproc->dev;
 	int i;
 
+	/* Handle single power domain */
+	if (dev->pm_domain && pd_count) {
+		pm_runtime_disable(dev);
+		return;
+	}
+
 	for (i = 0; i < pd_count; i++)
 		dev_pm_domain_detach(pds[i], false);
 }
-- 
2.34.1