drm: IRQ midlayer is now legacy

Hide the DRM midlayer behind CONFIG_DRM_LEGACY, make functions use
the prefix drm_legacy_, and move declarations to drm_legacy.h.
In struct drm_device, move the fields irq and irq_enabled behind
CONFIG_DRM_LEGACY.

All callers have been updated.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-15-tzimmermann@suse.de

8 files changed, 16 insertions, 70 deletions

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 4a13d2fc5252..13e1d5c4ec82 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -60,46 +60,14 @@
 #include <drm/drm.h>
 #include <drm/drm_device.h>
 #include <drm/drm_drv.h>
-#include <drm/drm_irq.h>
+#include <drm/drm_legacy.h>
 #include <drm/drm_print.h>
 #include <drm/drm_vblank.h>
 
 #include "drm_internal.h"
 
-/**
- * DOC: irq helpers
- *
- * The DRM core provides very simple support helpers to enable IRQ handling on a
- * device through the drm_irq_install() and drm_irq_uninstall() functions. This
- * only supports devices with a single interrupt on the main device stored in
- * &drm_device.dev and set as the device parameter in drm_dev_alloc().
- *
- * These IRQ helpers are strictly optional. Since these helpers don't automatically
- * clean up the requested interrupt like e.g. devm_request_irq() they're not really
- * recommended.
- */
-
-/**
- * drm_irq_install - install IRQ handler
- * @dev: DRM device
- * @irq: IRQ number to install the handler for
- *
- * Initializes the IRQ related data. Installs the handler, calling the driver
- * &drm_driver.irq_preinstall and &drm_driver.irq_postinstall functions before
- * and after the installation.
- *
- * This is the simplified helper interface provided for drivers with no special
- * needs.
- *
- * @irq must match the interrupt number that would be passed to request_irq(),
- * if called directly instead of using this helper function.
- *
- * &drm_driver.irq_handler is called to handle the registered interrupt.
- *
- * Returns:
- * Zero on success or a negative error code on failure.
- */
-int drm_irq_install(struct drm_device *dev, int irq)
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
+static int drm_legacy_irq_install(struct drm_device *dev, int irq)
 {
 	int ret;
 	unsigned long sh_flags = 0;
@@ -144,24 +112,8 @@ int drm_irq_install(struct drm_device *dev, int irq)
 
 	return ret;
 }
-EXPORT_SYMBOL(drm_irq_install);
 
-/**
- * drm_irq_uninstall - uninstall the IRQ handler
- * @dev: DRM device
- *
- * Calls the driver's &drm_driver.irq_uninstall function and unregisters the IRQ
- * handler.  This should only be called by drivers which used drm_irq_install()
- * to set up their interrupt handler.
- *
- * Note that for kernel modesetting drivers it is a bug if this function fails.
- * The sanity checks are only to catch buggy user modesetting drivers which call
- * the same function through an ioctl.
- *
- * Returns:
- * Zero on success or a negative error code on failure.
- */
-int drm_irq_uninstall(struct drm_device *dev)
+int drm_legacy_irq_uninstall(struct drm_device *dev)
 {
 	unsigned long irqflags;
 	bool irq_enabled;
@@ -207,9 +159,8 @@ int drm_irq_uninstall(struct drm_device *dev)
 
 	return 0;
 }
-EXPORT_SYMBOL(drm_irq_uninstall);
+EXPORT_SYMBOL(drm_legacy_irq_uninstall);
 
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
 int drm_legacy_irq_control(struct drm_device *dev, void *data,
 			   struct drm_file *file_priv)
 {
@@ -238,13 +189,13 @@ int drm_legacy_irq_control(struct drm_device *dev, void *data,
 		    ctl->irq != irq)
 			return -EINVAL;
 		mutex_lock(&dev->struct_mutex);
-		ret = drm_irq_install(dev, irq);
+		ret = drm_legacy_irq_install(dev, irq);
 		mutex_unlock(&dev->struct_mutex);
 
 		return ret;
 	case DRM_UNINST_HANDLER:
 		mutex_lock(&dev->struct_mutex);
-		ret = drm_irq_uninstall(dev);
+		ret = drm_legacy_irq_uninstall(dev);
 		mutex_unlock(&dev->struct_mutex);
 
 		return ret;
diff --git a/drivers/gpu/drm/drm_legacy_misc.c b/drivers/gpu/drm/drm_legacy_misc.c
index 83db43b7a25e..d4c5434062d7 100644
--- a/drivers/gpu/drm/drm_legacy_misc.c
+++ b/drivers/gpu/drm/drm_legacy_misc.c
@@ -35,7 +35,6 @@
 
 #include <drm/drm_device.h>
 #include <drm/drm_drv.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_print.h>
 
 #include "drm_internal.h"
@@ -78,7 +77,7 @@ int drm_legacy_setup(struct drm_device * dev)
 void drm_legacy_dev_reinit(struct drm_device *dev)
 {
 	if (dev->irq_enabled)
-		drm_irq_uninstall(dev);
+		drm_legacy_irq_uninstall(dev);
 
 	mutex_lock(&dev->struct_mutex);
 
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 977b6509bb4b..b701cda86d0c 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -1739,10 +1739,10 @@ static void drm_wait_vblank_reply(struct drm_device *dev, unsigned int pipe,
 
 static bool drm_wait_vblank_supported(struct drm_device *dev)
 {
-	if  (IS_ENABLED(CONFIG_DRM_LEGACY)) {
-		if (unlikely(drm_core_check_feature(dev, DRIVER_LEGACY)))
-			return dev->irq_enabled;
-	}
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
+	if (unlikely(drm_core_check_feature(dev, DRIVER_LEGACY)))
+		return dev->irq_enabled;
+#endif
 	return drm_dev_has_vblank(dev);
 }
 
diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c
index d78c82af367c..9fb4dd63342f 100644
--- a/drivers/gpu/drm/i810/i810_dma.c
+++ b/drivers/gpu/drm/i810/i810_dma.c
@@ -38,7 +38,6 @@
 #include <drm/drm_drv.h>
 #include <drm/drm_file.h>
 #include <drm/drm_ioctl.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_print.h>
 #include <drm/i810_drm.h>
 
@@ -209,7 +208,7 @@ static int i810_dma_cleanup(struct drm_device *dev)
 	 * is freed, it's too late.
 	 */
 	if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
-		drm_irq_uninstall(dev);
+		drm_legacy_irq_uninstall(dev);
 
 	if (dev->dev_private) {
 		int i;
diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c
index 403efc1f1a7c..331c2f0da57a 100644
--- a/drivers/gpu/drm/mga/mga_dma.c
+++ b/drivers/gpu/drm/mga/mga_dma.c
@@ -949,7 +949,7 @@ static int mga_do_cleanup_dma(struct drm_device *dev, int full_cleanup)
 	 * is freed, it's too late.
 	 */
 	if (dev->irq_enabled)
-		drm_irq_uninstall(dev);
+		drm_legacy_irq_uninstall(dev);
 
 	if (dev->dev_private) {
 		drm_mga_private_t *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/mga/mga_drv.h b/drivers/gpu/drm/mga/mga_drv.h
index 84395d81ab9b..f61401c70b90 100644
--- a/drivers/gpu/drm/mga/mga_drv.h
+++ b/drivers/gpu/drm/mga/mga_drv.h
@@ -38,7 +38,6 @@
 #include <drm/drm_device.h>
 #include <drm/drm_file.h>
 #include <drm/drm_ioctl.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_legacy.h>
 #include <drm/drm_print.h>
 #include <drm/drm_sarea.h>
diff --git a/drivers/gpu/drm/r128/r128_cce.c b/drivers/gpu/drm/r128/r128_cce.c
index 2a2933c16308..c04d84a69dd2 100644
--- a/drivers/gpu/drm/r128/r128_cce.c
+++ b/drivers/gpu/drm/r128/r128_cce.c
@@ -39,7 +39,6 @@
 
 #include <drm/drm_device.h>
 #include <drm/drm_file.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_legacy.h>
 #include <drm/drm_print.h>
 #include <drm/r128_drm.h>
@@ -603,7 +602,7 @@ int r128_do_cleanup_cce(struct drm_device *dev)
 	 * is freed, it's too late.
 	 */
 	if (dev->irq_enabled)
-		drm_irq_uninstall(dev);
+		drm_legacy_irq_uninstall(dev);
 
 	if (dev->dev_private) {
 		drm_r128_private_t *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index dae1bacd86c1..c9afa1a51f23 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -29,7 +29,6 @@
 
 #include <drm/drm_device.h>
 #include <drm/drm_file.h>
-#include <drm/drm_irq.h>
 #include <drm/via_drm.h>
 
 #include "via_drv.h"
@@ -86,7 +85,7 @@ int via_final_context(struct drm_device *dev, int context)
 	/* Last context, perform cleanup */
 	if (list_is_singular(&dev->ctxlist)) {
 		DRM_DEBUG("Last Context\n");
-		drm_irq_uninstall(dev);
+		drm_legacy_irq_uninstall(dev);
 		via_cleanup_futex(dev_priv);
 		via_do_cleanup_map(dev);
 	}