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From:   Maulik Shah <mkshah@codeaurora.org>
To:     swboyd@chromium.org, mka@chromium.org, evgreen@chromium.org,
        bjorn.andersson@linaro.org
Cc:     linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        agross@kernel.org, dianders@chromium.org, rnayak@codeaurora.org,
        ilina@codeaurora.org, lsrao@codeaurora.org,
        Maulik Shah <mkshah@codeaurora.org>
Subject: [PATCH v7 3/3] soc: qcom: rpmh: Invoke rpmh_flush for dirty caches
Date:   Wed, 26 Feb 2020 10:57:13 +0530
Message-Id: <1582694833-9407-4-git-send-email-mkshah@codeaurora.org>
In-Reply-To: <1582694833-9407-1-git-send-email-mkshah@codeaurora.org>
References: <1582694833-9407-1-git-send-email-mkshah@codeaurora.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add changes to invoke rpmh flush when the data in cache is dirty.

This is done only if OSI is not supported in PSCI. If OSI is supported
rpmh_flush can get invoked when the last cpu going to power collapse
deepest low power mode.

Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Reviewed-by: Srinivas Rao L <lsrao@codeaurora.org>
---
 drivers/soc/qcom/rpmh.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
index 83ba4e0..839af8d 100644
--- a/drivers/soc/qcom/rpmh.c
+++ b/drivers/soc/qcom/rpmh.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/psci.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
@@ -163,6 +164,9 @@ static struct cache_req *cache_rpm_request(struct rpmh_ctrlr *ctrlr,
 unlock:
 	spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
 
+	if (ctrlr->dirty && !psci_has_osi_support())
+		return rpmh_flush(ctrlr) ? ERR_PTR(-EINVAL) : req;
+
 	return req;
 }
 
@@ -391,6 +395,8 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
 
 	if (state != RPMH_ACTIVE_ONLY_STATE) {
 		cache_batch(ctrlr, req);
+		if (!psci_has_osi_support())
+			return rpmh_flush(ctrlr);
 		return 0;
 	}
 
-- 
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