This is a note to let you know that I've just added the patch titled
drm/fsl-dcu: Convert to Linux IRQ interfaces
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-fsl-dcu-convert-to-linux-irq-interfaces.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 75388df24d42977379132c72fd904480f44f1690
Author: Thomas Zimmermann <tzimmermann@xxxxxxx>
Date: Tue Aug 3 11:06:54 2021 +0200
drm/fsl-dcu: Convert to Linux IRQ interfaces
[ Upstream commit 03ac16e584e496230903ba20f2b4bbfd942a16b4 ]
Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it. DRM IRQ callbacks are now being called
directly or inlined.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-5-tzimmermann@xxxxxxx
Stable-dep-of: ffcde9e44d3e ("drm: fsl-dcu: enable PIXCLK on LS1021A")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
index abbc1ddbf27f0..11b4a81bacc68 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -23,7 +23,6 @@
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_irq.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
@@ -51,7 +50,7 @@ static const struct regmap_config fsl_dcu_regmap_config = {
.volatile_reg = fsl_dcu_drm_is_volatile_reg,
};
-static void fsl_dcu_irq_uninstall(struct drm_device *dev)
+static void fsl_dcu_irq_reset(struct drm_device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
@@ -59,6 +58,45 @@ static void fsl_dcu_irq_uninstall(struct drm_device *dev)
regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
}
+static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
+{
+ struct drm_device *dev = arg;
+ struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+ unsigned int int_status;
+ int ret;
+
+ ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
+ if (ret) {
+ dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
+ return IRQ_NONE;
+ }
+
+ if (int_status & DCU_INT_STATUS_VBLANK)
+ drm_handle_vblank(dev, 0);
+
+ regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
+
+ return IRQ_HANDLED;
+}
+
+static int fsl_dcu_irq_install(struct drm_device *dev, unsigned int irq)
+{
+ if (irq == IRQ_NOTCONNECTED)
+ return -ENOTCONN;
+
+ fsl_dcu_irq_reset(dev);
+
+ return request_irq(irq, fsl_dcu_drm_irq, 0, dev->driver->name, dev);
+}
+
+static void fsl_dcu_irq_uninstall(struct drm_device *dev)
+{
+ struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+
+ fsl_dcu_irq_reset(dev);
+ free_irq(fsl_dev->irq, dev);
+}
+
static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
@@ -73,13 +111,13 @@ static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
if (ret < 0) {
dev_err(dev->dev, "failed to initialize vblank\n");
- goto done;
+ goto done_vblank;
}
- ret = drm_irq_install(dev, fsl_dev->irq);
+ ret = fsl_dcu_irq_install(dev, fsl_dev->irq);
if (ret < 0) {
dev_err(dev->dev, "failed to install IRQ handler\n");
- goto done;
+ goto done_irq;
}
if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
@@ -90,11 +128,11 @@ static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
}
return 0;
-done:
+done_irq:
drm_kms_helper_poll_fini(dev);
drm_mode_config_cleanup(dev);
- drm_irq_uninstall(dev);
+done_vblank:
dev->dev_private = NULL;
return ret;
@@ -106,41 +144,17 @@ static void fsl_dcu_unload(struct drm_device *dev)
drm_kms_helper_poll_fini(dev);
drm_mode_config_cleanup(dev);
- drm_irq_uninstall(dev);
+ fsl_dcu_irq_uninstall(dev);
dev->dev_private = NULL;
}
-static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
-{
- struct drm_device *dev = arg;
- struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
- unsigned int int_status;
- int ret;
-
- ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
- if (ret) {
- dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
- return IRQ_NONE;
- }
-
- if (int_status & DCU_INT_STATUS_VBLANK)
- drm_handle_vblank(dev, 0);
-
- regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
-
- return IRQ_HANDLED;
-}
-
DEFINE_DRM_GEM_CMA_FOPS(fsl_dcu_drm_fops);
static struct drm_driver fsl_dcu_drm_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.load = fsl_dcu_load,
.unload = fsl_dcu_unload,
- .irq_handler = fsl_dcu_drm_irq,
- .irq_preinstall = fsl_dcu_irq_uninstall,
- .irq_uninstall = fsl_dcu_irq_uninstall,
DRM_GEM_CMA_DRIVER_OPS,
.fops = &fsl_dcu_drm_fops,
.name = "fsl-dcu-drm",
