linux-kernel - [PATCH v5 2/2] drm/bridge: anx7625: add suspend / resume hooks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210517063553.554955-2-pihsun@chromium.org>
Date:   Mon, 17 May 2021 14:35:29 +0800
From:   Pi-Hsun Shih <pihsun@...omium.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Pi-Hsun Shih <pihsun@...omium.org>,
        Tzung-Bi Shih <tzungbi@...gle.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Xin Ji <xji@...logixsemi.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v5 2/2] drm/bridge: anx7625: add suspend / resume hooks

Add suspend / resume hooks for anx7625 driver, that power off the device
on suspend and power on the device on resume if it was previously
powered.

Signed-off-by: Pi-Hsun Shih <pihsun@...omium.org>
---

Changes in v5:
* Disable irq and flush workqueue in suspend hook, so the irq handler
  won't be run during suspend.

Changes in v3, v4:
* No change.

---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 32 +++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index e1bf31eafe22..8fb76ca66e5b 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1705,7 +1705,39 @@ static int __maybe_unused anx7625_runtime_pm_resume(struct device *dev)
 	return 0;
 }
 
+static int __maybe_unused anx7625_resume(struct device *dev)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	if (!ctx->pdata.intp_irq)
+		return 0;
+
+	if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
+		enable_irq(ctx->pdata.intp_irq);
+		anx7625_runtime_pm_resume(dev);
+	}
+
+	return 0;
+}
+
+static int __maybe_unused anx7625_suspend(struct device *dev)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	if (!ctx->pdata.intp_irq)
+		return 0;
+
+	if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
+		anx7625_runtime_pm_suspend(dev);
+		disable_irq(ctx->pdata.intp_irq);
+		flush_workqueue(ctx->workqueue);
+	}
+
+	return 0;
+}
+
 static const struct dev_pm_ops anx7625_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(anx7625_suspend, anx7625_resume)
 	SET_RUNTIME_PM_OPS(anx7625_runtime_pm_suspend,
 			   anx7625_runtime_pm_resume, NULL)
 };
-- 
2.31.1.751.gd2f1c929bd-goog