disp: msm: use linux IRQ interfaces instead of DRM helpers

Update the msm layer to use linux IRQ interfaces as DRM IRQ helpers
are removed in 5.15 kernel.

Change-Id: I9f41032927cddabe8a5a48e5e9339acef6c6f67e
Signed-off-by: Bruce Hoo <bingchua@codeaurora.org>
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>

msm/msm_drv.c

@@ -41,7 +41,6 @@
 #include <linux/kthread.h>
 #include <uapi/linux/sched/types.h>
 #include <drm/drm_of.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_ioctl.h>
 #include <drm/drm_vblank.h>
 #include <drm/drm_drv.h>
@@ -343,6 +342,71 @@ u32 msm_readl(const void __iomem *addr)
 	return val;
 }
 
+static irqreturn_t msm_irq(int irq, void *arg)
+{
+	struct drm_device *dev = arg;
+	struct msm_drm_private *priv = dev->dev_private;
+	struct msm_kms *kms = priv->kms;
+
+	BUG_ON(!kms);
+
+	return kms->funcs->irq(kms);
+}
+
+static void msm_irq_preinstall(struct drm_device *dev)
+{
+	struct msm_drm_private *priv = dev->dev_private;
+	struct msm_kms *kms = priv->kms;
+
+	BUG_ON(!kms);
+
+	kms->funcs->irq_preinstall(kms);
+}
+
+static int msm_irq_postinstall(struct drm_device *dev)
+{
+	struct msm_drm_private *priv = dev->dev_private;
+	struct msm_kms *kms = priv->kms;
+
+	BUG_ON(!kms);
+
+	if (kms->funcs->irq_postinstall)
+		return kms->funcs->irq_postinstall(kms);
+
+	return 0;
+}
+
+static int msm_irq_install(struct drm_device *dev, unsigned int irq)
+{
+	int ret;
+
+	if (irq == IRQ_NOTCONNECTED)
+		return -ENOTCONN;
+
+	msm_irq_preinstall(dev);
+
+	ret = request_irq(irq, msm_irq, 0, dev->driver->name, dev);
+	if (ret)
+		return ret;
+
+	ret = msm_irq_postinstall(dev);
+	if (ret) {
+		free_irq(irq, dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void msm_irq_uninstall(struct drm_device *dev)
+{
+	struct msm_drm_private *priv = dev->dev_private;
+	struct msm_kms *kms = priv->kms;
+
+	kms->funcs->irq_uninstall(kms);
+	free_irq(kms->irq, dev);
+}
+
 int msm_get_src_bpc(int chroma_format,
 	int bpc)
 {
@@ -410,7 +474,7 @@ static int msm_drm_uninit(struct device *dev)
 		msm_fbdev_free(ddev);
 #endif
 	drm_atomic_helper_shutdown(ddev);
-	drm_irq_uninstall(ddev);
+	msm_irq_uninstall(ddev);
 
 	if (kms && kms->funcs)
 		kms->funcs->destroy(kms);
@@ -859,7 +923,7 @@ static int msm_drm_component_init(struct device *dev)
 
 	if (kms) {
 		pm_runtime_get_sync(dev);
-		ret = drm_irq_install(ddev, platform_get_irq(pdev, 0));
+		ret = msm_irq_install(ddev, platform_get_irq(pdev, 0));
 		pm_runtime_put_sync(dev);
 		if (ret < 0) {
 			dev_err(dev, "failed to install IRQ handler\n");
@@ -1065,43 +1129,6 @@ static void msm_lastclose(struct drm_device *dev)
 		kms->funcs->lastclose(kms);
 }
 
-static irqreturn_t msm_irq(int irq, void *arg)
-{
-	struct drm_device *dev = arg;
-	struct msm_drm_private *priv = dev->dev_private;
-	struct msm_kms *kms = priv->kms;
-	BUG_ON(!kms);
-	return kms->funcs->irq(kms);
-}
-
-static void msm_irq_preinstall(struct drm_device *dev)
-{
-	struct msm_drm_private *priv = dev->dev_private;
-	struct msm_kms *kms = priv->kms;
-	BUG_ON(!kms);
-	kms->funcs->irq_preinstall(kms);
-}
-
-static int msm_irq_postinstall(struct drm_device *dev)
-{
-	struct msm_drm_private *priv = dev->dev_private;
-	struct msm_kms *kms = priv->kms;
-	BUG_ON(!kms);
-
-	if (kms->funcs->irq_postinstall)
-		return kms->funcs->irq_postinstall(kms);
-
-	return 0;
-}
-
-static void msm_irq_uninstall(struct drm_device *dev)
-{
-	struct msm_drm_private *priv = dev->dev_private;
-	struct msm_kms *kms = priv->kms;
-	BUG_ON(!kms);
-	kms->funcs->irq_uninstall(kms);
-}
-
 /*
  * DRM ioctls:
  */
@@ -1708,10 +1735,6 @@ static struct drm_driver msm_driver = {
 	.open               = msm_open,
 	.postclose          = msm_postclose,
 	.lastclose          = msm_lastclose,
-	.irq_handler        = msm_irq,
-	.irq_preinstall     = msm_irq_preinstall,
-	.irq_postinstall    = msm_irq_postinstall,
-	.irq_uninstall      = msm_irq_uninstall,
 	.dumb_create        = msm_gem_dumb_create,
 	.dumb_map_offset    = msm_gem_dumb_map_offset,
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,

msm/msm_kms.h

@@ -142,7 +142,7 @@ struct msm_kms_funcs {
 struct msm_kms {
 	const struct msm_kms_funcs *funcs;
 
-	/* irq number to be passed on to drm_irq_install */
+	/* irq number to be passed on to msm_irq_install */
 	int irq;
 
 	/* mapper-id used to request GEM buffer mapped for scanout: */