[PATCH v1 0/2] drm/atmel-hlcdc: drop use of drm_irq mid-layer

[PATCH v1 0/2] drm/atmel-hlcdc: drop use of drm_irq mid-layer

[Sam Ravnborg]

[Ignore the first mail - wrong patch was attached]

Two small patches to drop the use of the drm irq mid-layer.
My atmel hlcdc target has stopped working - so unfortunately un-tested :-(
I picked up this to continue the work of Thomas Zimmermann.

	Sam


Sam Ravnborg (2):
      drm/atmel-hlcdc: Move interrupt helper funtions
      drm/atmel-hlcdc: Convert to Linux IRQ interfaces

 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 63 +++++++++++++---------------
 1 file changed, 30 insertions(+), 33 deletions(-)




_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v1 1/2] drm/atmel-hlcdc: Move interrupt helper funtions

[Sam Ravnborg]

This is in preparation for removal of drm_irq use.
Functions are moved without any other changes.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: linux-arm-kernel@lists.infradead.org
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 52 ++++++++++----------
 1 file changed, 26 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index 65af56e47129..f67363188cbc 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -521,6 +521,32 @@ atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
 	return MODE_OK;
 }
 
+static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+	unsigned int cfg = 0;
+	int i;
+
+	/* Enable interrupts on activated layers */
+	for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
+		if (dc->layers[i])
+			cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
+	}
+
+	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
+
+	return 0;
+}
+
+static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+	unsigned int isr;
+
+	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
+	regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
+}
+
 static void atmel_hlcdc_layer_irq(struct atmel_hlcdc_layer *layer)
 {
 	if (!layer)
@@ -684,32 +710,6 @@ static void atmel_hlcdc_dc_unload(struct drm_device *dev)
 	clk_disable_unprepare(dc->hlcdc->periph_clk);
 }
 
-static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
-{
-	struct atmel_hlcdc_dc *dc = dev->dev_private;
-	unsigned int cfg = 0;
-	int i;
-
-	/* Enable interrupts on activated layers */
-	for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
-		if (dc->layers[i])
-			cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
-	}
-
-	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
-
-	return 0;
-}
-
-static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
-{
-	struct atmel_hlcdc_dc *dc = dev->dev_private;
-	unsigned int isr;
-
-	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
-	regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
-}
-
 DEFINE_DRM_GEM_CMA_FOPS(fops);
 
 static const struct drm_driver atmel_hlcdc_dc_driver = {
-- 
2.30.2


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v1 2/2] drm/atmel-hlcdc: Convert to Linux IRQ interfaces

[Sam Ravnborg]

The drm mid-layer for irq's is not relevant for atomic display drivers,
and will be available only for legacy drivers in the future.
Drop usage in the atmel hlcdc driver.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: linux-arm-kernel@lists.infradead.org
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index f67363188cbc..6b3f353e1cc7 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -22,7 +22,6 @@
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_vblank.h>
 
@@ -521,9 +520,8 @@ atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
 	return MODE_OK;
 }
 
-static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
+static int atmel_hlcdc_dc_irq_postinstall(struct atmel_hlcdc_dc *dc)
 {
-	struct atmel_hlcdc_dc *dc = dev->dev_private;
 	unsigned int cfg = 0;
 	int i;
 
@@ -538,9 +536,8 @@ static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
 	return 0;
 }
 
-static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
+static void atmel_hlcdc_dc_irq_reset(struct atmel_hlcdc_dc *dc)
 {
-	struct atmel_hlcdc_dc *dc = dev->dev_private;
 	unsigned int isr;
 
 	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
@@ -672,12 +669,14 @@ static int atmel_hlcdc_dc_load(struct drm_device *dev)
 	drm_mode_config_reset(dev);
 
 	pm_runtime_get_sync(dev->dev);
-	ret = drm_irq_install(dev, dc->hlcdc->irq);
+	atmel_hlcdc_dc_irq_reset(dc);
+	ret = request_irq(dc->hlcdc->irq, atmel_hlcdc_dc_irq_handler, 0, dev->driver->name, dev);
 	pm_runtime_put_sync(dev->dev);
 	if (ret < 0) {
 		dev_err(dev->dev, "failed to install IRQ handler\n");
 		goto err_periph_clk_disable;
 	}
+	atmel_hlcdc_dc_irq_postinstall(dc);
 
 	platform_set_drvdata(pdev, dev);
 
@@ -701,7 +700,9 @@ static void atmel_hlcdc_dc_unload(struct drm_device *dev)
 	drm_mode_config_cleanup(dev);
 
 	pm_runtime_get_sync(dev->dev);
-	drm_irq_uninstall(dev);
+
+	atmel_hlcdc_dc_irq_reset(dc);
+	free_irq(dc->hlcdc->irq, dev);
 	pm_runtime_put_sync(dev->dev);
 
 	dev->dev_private = NULL;
@@ -714,10 +715,6 @@ DEFINE_DRM_GEM_CMA_FOPS(fops);
 
 static const struct drm_driver atmel_hlcdc_dc_driver = {
 	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
-	.irq_handler = atmel_hlcdc_dc_irq_handler,
-	.irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
-	.irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
-	.irq_uninstall = atmel_hlcdc_dc_irq_uninstall,
 	DRM_GEM_CMA_DRIVER_OPS,
 	.fops = &fops,
 	.name = "atmel-hlcdc",
-- 
2.30.2


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v1 0/2] drm/atmel-hlcdc: drop use of drm_irq mid-layer

[Dan.Sneddon]

I tested this patch set on the 9x60ek board and unfortunately it causes 
errors.  The vbltest returns -1 and I also see the display get out of 
sync while testing with a gui application.


Regards,

Dan

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v1 0/2] drm/atmel-hlcdc: drop use of drm_irq mid-layer

[Sam Ravnborg]

Hi Dan,
On Thu, Jul 15, 2021 at 09:55:09PM +0000, Dan.Sneddon@microchip.com wrote:
> I tested this patch set on the 9x60ek board and unfortunately it causes 
> errors.  The vbltest returns -1 and I also see the display get out of 
> sync while testing with a gui application.

Thanks a lot for the testing, I will take a look tomorrow and see if I
can figure out what is wrong.

	Sam

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v1 0/2] drm/atmel-hlcdc: drop use of drm_irq mid-layer

[Sam Ravnborg]

Two small patches to drop the use of the drm irq mid-layer.
My atmel hlcdc target has stopped working - so unfortunately un-tested :-(
I picked up this to continue the work of Thomas Zimmermann.

	Sam


Sam Ravnborg (2):
      drm/atmel-hlcdc: Move interrupt helper funtions
      drm/atmel-hlcdc: Convert to Linux IRQ interfaces

 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 63 +++++++++++++---------------
 1 file changed, 30 insertions(+), 33 deletions(-)




_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel