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From:   Tian Tao <tiantao6@hisilicon.com>
To:     <airlied@linux.ie>, <daniel@ffwll.ch>, <tzimmermann@suse.de>,
        <kraxel@redhat.com>, <alexander.deucher@amd.com>,
        <tglx@linutronix.de>, <dri-devel@lists.freedesktop.org>,
        <xinliang.liu@linaro.org>, <maarten.lankhorst@linux.intel.com>,
        <mripard@kernel.org>
CC:     <linux-kernel@vger.kernel.org>
Subject: [PATCH drm/hisilicon v2 3/4] drm/irq: Add the new api to install irq
Date:   Tue, 1 Dec 2020 19:55:53 +0800
Message-ID: <1606823754-52451-4-git-send-email-tiantao6@hisilicon.com>
In-Reply-To: <1606823754-52451-1-git-send-email-tiantao6@hisilicon.com>
References: <1606823754-52451-1-git-send-email-tiantao6@hisilicon.com>
MIME-Version: 1.0
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Add new api devm_drm_irq_install() to register interrupts,
no need to call drm_irq_uninstall() when the drm module is removed.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
---
 drivers/gpu/drm/drm_irq.c | 35 +++++++++++++++++++++++++++++++++++
 include/drm/drm_irq.h     |  2 +-
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 09d6e9e..b363dec 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -214,6 +214,41 @@ int drm_irq_uninstall(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_irq_uninstall);
 
+static void devm_drm_irq_uninstall(void *data)
+{
+	drm_irq_uninstall(data);
+}
+
+/**
+ * devm_drm_irq_install - install IRQ handler
+ * @dev: DRM device
+ * @irq: IRQ number to install the handler for
+ *
+ * devm_drm_irq_install is a  help function of drm_irq_install.
+ *
+ * if the driver uses devm_drm_irq_install, there is no need
+ * to call drm_irq_uninstall when the drm module get unloaded,
+ * as this will done automagically.
+ *
+ * Returns:
+ * Zero on success or a negative error code on failure.
+ */
+int devm_drm_irq_install(struct drm_device *dev, int irq)
+{
+	int ret;
+
+	ret = drm_irq_install(dev, irq);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(dev->dev, devm_drm_irq_uninstall, dev);
+	if (ret)
+		devm_drm_irq_uninstall(dev);
+
+	return ret;
+}
+EXPORT_SYMBOL(devm_drm_irq_install);
+
 #if IS_ENABLED(CONFIG_DRM_LEGACY)
 int drm_legacy_irq_control(struct drm_device *dev, void *data,
 			   struct drm_file *file_priv)
diff --git a/include/drm/drm_irq.h b/include/drm/drm_irq.h
index d77f6e6..631b22f 100644
--- a/include/drm/drm_irq.h
+++ b/include/drm/drm_irq.h
@@ -28,5 +28,5 @@ struct drm_device;
 
 int drm_irq_install(struct drm_device *dev, int irq);
 int drm_irq_uninstall(struct drm_device *dev);
-
+int devm_drm_irq_install(struct drm_device *dev, int irq);
 #endif
-- 
2.7.4