From: Stefan Agner <stefan@agner.ch>
Date: Thu, 1 Jun 2017 19:43:30 -0700
Subject: drm/fsl-dcu: implement irq_preinstall/uninstall callbacks
Git-commit: 685ec6ebcd0edde718d2c95a550bca36563c9055
Patch-mainline: v4.13-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Make use of the irq_preinstall/uninstall callback to clear and
mask all interrupts. Use write 1 to clear as documented by the
data sheet (writing a 0 seems to have cleared interrupt status
too). Remove fsl_dcu_drm_irq_init and call drm_irq_install
directly from fsl_dcu_load makes error handling a bit simpler.
Do not set irq_enabled since drm_irq_install is taking care of
it.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 20 ++++++++------------
1 file changed, 8 insertions(+), 12 deletions(-)
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -51,19 +51,12 @@ static const struct regmap_config fsl_dc
.volatile_reg = fsl_dcu_drm_is_volatile_reg,
};
-static int fsl_dcu_drm_irq_init(struct drm_device *dev)
+static void fsl_dcu_irq_uninstall(struct drm_device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
- int ret;
- ret = drm_irq_install(dev, fsl_dev->irq);
- if (ret < 0)
- dev_err(dev->dev, "failed to install IRQ handler\n");
-
- regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
+ regmap_write(fsl_dev->regmap, DCU_INT_STATUS, ~0);
regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
-
- return ret;
}
static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
@@ -83,10 +76,11 @@ static int fsl_dcu_load(struct drm_devic
goto done;
}
- ret = fsl_dcu_drm_irq_init(dev);
- if (ret < 0)
+ ret = drm_irq_install(dev, fsl_dev->irq);
+ if (ret < 0) {
+ dev_err(dev->dev, "failed to install IRQ handler\n");
goto done;
- dev->irq_enabled = true;
+ }
if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
legacyfb_depth != 32) {
@@ -168,6 +162,8 @@ static struct drm_driver fsl_dcu_drm_dri
.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,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,