remoteproc: qcom_q6v5_pas: Make single-PD handling more robust

[ Upstream commit e917b73234b02aa4966325e7380d2559bf127ba9 ]

Only go into the if condition for single-PD handling when there's
actually just one power domain specified there. Otherwise it'll be an
issue in the dts and we should fail in the regular code path.

This also mirrors the latest changes in the qcom_q6v5_mss driver.

Suggested-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Fixes: 17ee2fb4e856 ("remoteproc: qcom: pas: Vote for active/proxy power domains")
Signed-off-by: Luca Weiss <luca@lucaweiss.eu>
Reviewed-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Link: https://lore.kernel.org/r/20250128-pas-singlepd-v1-2-85d9ae4b0093@lucaweiss.eu
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 631c90afb5bc5c40feea349c62bd333f10fcefcc..679e89db85a05b6ea508e46edc466ad2dd4efbee 100644 (file)
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -389,16 +389,16 @@ static int adsp_pds_attach(struct device *dev, struct device **devs,
        if (!pd_names)
                return 0;
 
+       while (pd_names[num_pds])
+               num_pds++;
+
        /* Handle single power domain */
-       if (dev->pm_domain) {
+       if (num_pds == 1 && dev->pm_domain) {
                devs[0] = dev;
                pm_runtime_enable(dev);
                return 1;
        }
 
-       while (pd_names[num_pds])
-               num_pds++;
-
        for (i = 0; i < num_pds; i++) {
                devs[i] = dev_pm_domain_attach_by_name(dev, pd_names[i]);
                if (IS_ERR_OR_NULL(devs[i])) {
@@ -423,7 +423,7 @@ static void adsp_pds_detach(struct qcom_adsp *adsp, struct device **pds,
        int i;
 
        /* Handle single power domain */
-       if (dev->pm_domain && pd_count) {
+       if (pd_count == 1 && dev->pm_domain) {
                pm_runtime_disable(dev);
                return;
        }