[RFC PATCH v2] drm/exynos: make non kms drivers to be indenpendent modules
Inki Dae
inki.dae at samsung.com
Tue Nov 18 19:19:06 PST 2014
This patch makes non kms drivers to be independent modules.
For this, it removes all register codes to non kms drivers
from exynos_drm_drv module and adds module_init/exit
for each non kms driver so that each non kms driver can be
called independently.
In addition, this patch adds non kms register/unregister functions
to exynos_drm_core module and also modifies existing codes relevant
to sub driver.
The idea is that non kms driver is registered by entry point,
module_init, of each non kms driver and sets its own sub driver
to registered non kms driver object when the sub driver is probed.
For this, this patch adds a new structure, exynos_drm_non_kms_dev,
to exynos_drm_core module.
Changelog v2:
- check if available g2d device node.
- return 0 instead of -EPROBE_DEFER in case of no non kms device
registered. This case is not error.
Signed-off-by: Inki Dae <inki.dae at samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_core.c | 164 +++++++++++++++++++++++----
drivers/gpu/drm/exynos/exynos_drm_drv.c | 50 +-------
drivers/gpu/drm/exynos/exynos_drm_drv.h | 28 ++---
drivers/gpu/drm/exynos/exynos_drm_fimc.c | 13 +++
drivers/gpu/drm/exynos/exynos_drm_g2d.c | 42 +++++++
drivers/gpu/drm/exynos/exynos_drm_gsc.c | 12 ++
drivers/gpu/drm/exynos/exynos_drm_ipp.c | 39 ++++++-
drivers/gpu/drm/exynos/exynos_drm_rotator.c | 13 +++
8 files changed, 271 insertions(+), 90 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_core.c b/drivers/gpu/drm/exynos/exynos_drm_core.c
index 4c9f972..715a0ad 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_core.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_core.c
@@ -19,6 +19,13 @@
#include "exynos_drm_fbdev.h"
static LIST_HEAD(exynos_drm_subdrv_list);
+DEFINE_MUTEX(list_lock);
+
+struct exynos_drm_non_kms_dev {
+ struct list_head list;
+ struct exynos_drm_subdrv *subdrv;
+ unsigned int device_type;
+};
int exynos_drm_create_enc_conn(struct drm_device *dev,
struct exynos_drm_display *display)
@@ -55,12 +62,66 @@ err_destroy_encoder:
return ret;
}
+int exynos_drm_non_kms_register(unsigned int device_type)
+{
+ struct exynos_drm_non_kms_dev *dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->device_type = device_type;
+
+ mutex_lock(&list_lock);
+ list_add_tail(&dev->list, &exynos_drm_subdrv_list);
+ mutex_unlock(&list_lock);
+
+ return 0;
+}
+
+void exynos_drm_non_kms_unregister(unsigned int device_type)
+{
+ struct exynos_drm_non_kms_dev *dev, *next;
+
+ mutex_lock(&list_lock);
+ list_for_each_entry_safe(dev, next, &exynos_drm_subdrv_list, list) {
+ mutex_unlock(&list_lock);
+ if (dev->device_type == device_type) {
+ list_del_init(&dev->list);
+ kfree(dev);
+ mutex_lock(&list_lock);
+ break;
+ }
+ mutex_lock(&list_lock);
+ }
+ mutex_unlock(&list_lock);
+}
+
int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv)
{
+ struct exynos_drm_non_kms_dev *dev;
+
if (!subdrv)
return -EINVAL;
- list_add_tail(&subdrv->list, &exynos_drm_subdrv_list);
+ mutex_lock(&list_lock);
+ if (list_empty(&exynos_drm_subdrv_list)) {
+ mutex_unlock(&list_lock);
+ return -ENODEV;
+ }
+ mutex_unlock(&list_lock);
+
+ mutex_lock(&list_lock);
+ list_for_each_entry(dev, &exynos_drm_subdrv_list, list) {
+ mutex_unlock(&list_lock);
+ if (dev->device_type == subdrv->device_type) {
+ dev->subdrv = subdrv;
+ mutex_lock(&list_lock);
+ break;
+ }
+ mutex_lock(&list_lock);
+ }
+ mutex_unlock(&list_lock);
return 0;
}
@@ -68,94 +129,149 @@ EXPORT_SYMBOL_GPL(exynos_drm_subdrv_register);
int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *subdrv)
{
+ struct exynos_drm_non_kms_dev *dev;
+
if (!subdrv)
return -EINVAL;
- list_del(&subdrv->list);
+ mutex_lock(&list_lock);
+ list_for_each_entry(dev, &exynos_drm_subdrv_list, list) {
+ mutex_unlock(&list_lock);
+ if (dev->device_type == subdrv->device_type) {
+ dev->subdrv = NULL;
+ break;
+ }
+ mutex_lock(&list_lock);
+ }
+ mutex_unlock(&list_lock);
return 0;
}
EXPORT_SYMBOL_GPL(exynos_drm_subdrv_unregister);
-int exynos_drm_device_subdrv_probe(struct drm_device *dev)
+int exynos_drm_device_subdrv_probe(struct drm_device *drm_dev)
{
- struct exynos_drm_subdrv *subdrv, *n;
+ struct exynos_drm_non_kms_dev *dev, *n;
int err;
- if (!dev)
+ if (!drm_dev)
return -EINVAL;
- list_for_each_entry_safe(subdrv, n, &exynos_drm_subdrv_list, list) {
+ mutex_lock(&list_lock);
+ if (list_empty(&exynos_drm_subdrv_list)) {
+ mutex_unlock(&list_lock);
+ return 0;
+ }
+
+ list_for_each_entry(dev, &exynos_drm_subdrv_list, list) {
+ mutex_unlock(&list_lock);
+ /* Retry to probe if there is sub driver not registered yet. */
+ if (!dev->subdrv)
+ return -EPROBE_DEFER;
+ mutex_lock(&list_lock);
+ }
+
+ list_for_each_entry_safe(dev, n, &exynos_drm_subdrv_list, list) {
+ struct exynos_drm_subdrv *subdrv = dev->subdrv;
+
+ mutex_unlock(&list_lock);
if (subdrv->probe) {
- subdrv->drm_dev = dev;
+ subdrv->drm_dev = drm_dev;
/*
* this probe callback would be called by sub driver
* after setting of all resources to this sub driver,
* such as clock, irq and register map are done.
*/
- err = subdrv->probe(dev, subdrv->dev);
+ err = subdrv->probe(drm_dev, subdrv->dev);
if (err) {
DRM_DEBUG("exynos drm subdrv probe failed.\n");
- list_del(&subdrv->list);
+ list_del_init(&dev->list);
+ mutex_lock(&list_lock);
continue;
}
}
+ mutex_lock(&list_lock);
}
+ mutex_unlock(&list_lock);
return 0;
}
EXPORT_SYMBOL_GPL(exynos_drm_device_subdrv_probe);
-int exynos_drm_device_subdrv_remove(struct drm_device *dev)
+int exynos_drm_device_subdrv_remove(struct drm_device *drm_dev)
{
- struct exynos_drm_subdrv *subdrv;
+ struct exynos_drm_non_kms_dev *dev;
- if (!dev) {
+ if (!drm_dev) {
WARN(1, "Unexpected drm device unregister!\n");
return -EINVAL;
}
- list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
+ mutex_lock(&list_lock);
+ list_for_each_entry(dev, &exynos_drm_subdrv_list, list) {
+ struct exynos_drm_subdrv *subdrv = dev->subdrv;
+
+ mutex_unlock(&list_lock);
if (subdrv->remove)
- subdrv->remove(dev, subdrv->dev);
+ subdrv->remove(drm_dev, subdrv->dev);
+ mutex_lock(&list_lock);
}
+ mutex_unlock(&list_lock);
return 0;
}
EXPORT_SYMBOL_GPL(exynos_drm_device_subdrv_remove);
-int exynos_drm_subdrv_open(struct drm_device *dev, struct drm_file *file)
+int exynos_drm_subdrv_open(struct drm_device *drm_dev, struct drm_file *file)
{
- struct exynos_drm_subdrv *subdrv;
+ struct exynos_drm_non_kms_dev *dev;
int ret;
- list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
+ mutex_lock(&list_lock);
+ list_for_each_entry(dev, &exynos_drm_subdrv_list, list) {
+ struct exynos_drm_subdrv *subdrv = dev->subdrv;
+
+ mutex_unlock(&list_lock);
if (subdrv->open) {
- ret = subdrv->open(dev, subdrv->dev, file);
+ ret = subdrv->open(drm_dev, subdrv->dev, file);
if (ret)
goto err;
}
+ mutex_lock(&list_lock);
}
+ mutex_unlock(&list_lock);
return 0;
err:
- list_for_each_entry_reverse(subdrv, &subdrv->list, list) {
+ mutex_lock(&list_lock);
+ list_for_each_entry_reverse(dev, &exynos_drm_subdrv_list, list) {
+ struct exynos_drm_subdrv *subdrv = dev->subdrv;
+
+ mutex_unlock(&list_lock);
if (subdrv->close)
- subdrv->close(dev, subdrv->dev, file);
+ subdrv->close(drm_dev, subdrv->dev, file);
+ mutex_lock(&list_lock);
}
+ mutex_lock(&list_lock);
return ret;
}
EXPORT_SYMBOL_GPL(exynos_drm_subdrv_open);
-void exynos_drm_subdrv_close(struct drm_device *dev, struct drm_file *file)
+void exynos_drm_subdrv_close(struct drm_device *drm_dev, struct drm_file *file)
{
- struct exynos_drm_subdrv *subdrv;
+ struct exynos_drm_non_kms_dev *dev;
+
+ mutex_lock(&list_lock);
+ list_for_each_entry(dev, &exynos_drm_subdrv_list, list) {
+ struct exynos_drm_subdrv *subdrv = dev->subdrv;
- list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
+ mutex_unlock(&list_lock);
if (subdrv->close)
- subdrv->close(dev, subdrv->dev, file);
+ subdrv->close(drm_dev, subdrv->dev, file);
+ mutex_lock(&list_lock);
}
+ mutex_unlock(&list_lock);
}
EXPORT_SYMBOL_GPL(exynos_drm_subdrv_close);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 02d4772..7f1186e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -539,28 +539,10 @@ static const struct component_master_ops exynos_drm_ops = {
.unbind = exynos_drm_unbind,
};
-static struct platform_driver *const exynos_drm_non_kms_drivers[] = {
-#ifdef CONFIG_DRM_EXYNOS_G2D
- &g2d_driver,
-#endif
-#ifdef CONFIG_DRM_EXYNOS_FIMC
- &fimc_driver,
-#endif
-#ifdef CONFIG_DRM_EXYNOS_ROTATOR
- &rotator_driver,
-#endif
-#ifdef CONFIG_DRM_EXYNOS_GSC
- &gsc_driver,
-#endif
-#ifdef CONFIG_DRM_EXYNOS_IPP
- &ipp_driver,
-#endif
-};
-
static int exynos_drm_platform_probe(struct platform_device *pdev)
{
struct component_match *match;
- int ret, i, j;
+ int ret;
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
@@ -574,31 +556,13 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
- for (j = 0; j < ARRAY_SIZE(exynos_drm_non_kms_drivers); ++j) {
- ret = platform_driver_register(exynos_drm_non_kms_drivers[j]);
- if (ret < 0)
- goto err_del_component_master;
- }
-
- ret = exynos_platform_device_ipp_register();
- if (ret < 0)
- goto err_unregister_non_kms_drivers;
-
/* Probe non kms sub drivers and virtual display driver. */
ret = exynos_drm_device_subdrv_probe(platform_get_drvdata(pdev));
if (ret)
- goto err_unregister_resources;
+ goto err_del_component_master;
return ret;
-err_unregister_resources:
-#ifdef CONFIG_DRM_EXYNOS_IPP
- exynos_platform_device_ipp_unregister();
-#endif
-err_unregister_non_kms_drivers:
- while (--j >= 0)
- platform_driver_unregister(exynos_drm_non_kms_drivers[j]);
-
err_del_component_master:
component_master_del(&pdev->dev, &exynos_drm_ops);
@@ -607,17 +571,7 @@ err_del_component_master:
static int exynos_drm_platform_remove(struct platform_device *pdev)
{
- int i;
-
exynos_drm_device_subdrv_remove(platform_get_drvdata(pdev));
-
-#ifdef CONFIG_DRM_EXYNOS_IPP
- exynos_platform_device_ipp_unregister();
-#endif
-
- for (i = ARRAY_SIZE(exynos_drm_non_kms_drivers) - 1; i >= 0; --i)
- platform_driver_unregister(exynos_drm_non_kms_drivers[i]);
-
component_master_del(&pdev->dev, &exynos_drm_ops);
return 0;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 352a9f9..5b3305c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -41,6 +41,13 @@ enum exynos_drm_output_type {
EXYNOS_DISPLAY_TYPE_VIDI,
};
+/* This enumerates non kms device type. */
+enum exynos_drm_non_kms_type {
+ EXYNOS_DRM_NON_KMS_NONE,
+ EXYNOS_DRM_NON_KMS_G2D,
+ EXYNOS_DRM_NON_KMS_IPP,
+};
+
/*
* Exynos drm common overlay structure.
*
@@ -259,10 +266,10 @@ struct exynos_drm_private {
/*
* Exynos drm sub driver structure.
*
- * @list: sub driver has its own list object to register to exynos drm driver.
* @dev: pointer to device object for subdrv device driver.
* @drm_dev: pointer to drm_device and this pointer would be set
* when sub driver calls exynos_drm_subdrv_register().
+ * @device_type: non kms device type.
* @probe: this callback would be called by exynos drm driver after
* subdrv is registered to it.
* @remove: this callback is used to release resources created
@@ -271,9 +278,9 @@ struct exynos_drm_private {
* @close: this would be called with drm device file close.
*/
struct exynos_drm_subdrv {
- struct list_head list;
struct device *dev;
struct drm_device *drm_dev;
+ unsigned int device_type;
int (*probe)(struct drm_device *drm_dev, struct device *dev);
void (*remove)(struct drm_device *drm_dev, struct device *dev);
@@ -294,15 +301,6 @@ int exynos_drm_device_subdrv_remove(struct drm_device *dev);
int exynos_drm_subdrv_open(struct drm_device *dev, struct drm_file *file);
void exynos_drm_subdrv_close(struct drm_device *dev, struct drm_file *file);
-#ifdef CONFIG_DRM_EXYNOS_IPP
-int exynos_platform_device_ipp_register(void);
-void exynos_platform_device_ipp_unregister(void);
-#else
-static inline int exynos_platform_device_ipp_register(void) { return 0; }
-static inline void exynos_platform_device_ipp_unregister(void) {}
-#endif
-
-
#ifdef CONFIG_DRM_EXYNOS_DPI
struct exynos_drm_display * exynos_dpi_probe(struct device *dev);
int exynos_dpi_remove(struct device *dev);
@@ -331,11 +329,9 @@ int exynos_drm_component_add(struct device *dev,
void exynos_drm_component_del(struct device *dev,
enum exynos_drm_device_type dev_type);
+extern int exynos_drm_non_kms_register(unsigned int device_type);
+extern void exynos_drm_non_kms_unregister(unsigned int device_type);
+
extern struct platform_driver exynos_drm_common_hdmi_driver;
extern struct platform_driver vidi_driver;
-extern struct platform_driver g2d_driver;
-extern struct platform_driver fimc_driver;
-extern struct platform_driver rotator_driver;
-extern struct platform_driver gsc_driver;
-extern struct platform_driver ipp_driver;
#endif
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
index 68d38eb..05000ee 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
@@ -1860,3 +1860,16 @@ struct platform_driver fimc_driver = {
},
};
+static int fimc_driver_init(void)
+{
+ return platform_driver_register(&fimc_driver);
+}
+
+static void fimc_driver_exit(void)
+{
+ platform_driver_unregister(&fimc_driver);
+}
+
+module_init(fimc_driver_init);
+module_exit(fimc_driver_exit);
+
diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index 6ff8599..1f1dd20 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -1464,6 +1464,7 @@ static int g2d_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, g2d);
subdrv = &g2d->subdrv;
+ subdrv->device_type = EXYNOS_DRM_NON_KMS_G2D;
subdrv->dev = dev;
subdrv->probe = g2d_subdrv_probe;
subdrv->remove = g2d_subdrv_remove;
@@ -1585,3 +1586,44 @@ struct platform_driver g2d_driver = {
.of_match_table = exynos_g2d_match,
},
};
+
+static const char * const strings[] = {
+ "samsung,exynos4212-g2d",
+ "samsung,exynos5250-g2d",
+};
+
+static int exynos_g2d_init(void)
+{
+ struct device_node *np;
+ int ret, i;
+
+ /*
+ * Register non kms driver only in case that g2d device node exists
+ * and the device node is enabled.
+ *
+ * TODO. this code should be replaced with super device node.
+ */
+ for (i = 0; i < ARRAY_SIZE(strings); i++) {
+ np = of_find_compatible_node(NULL, NULL, strings[i]);
+ if (!np || !of_device_is_available(np))
+ return -ENODEV;
+ }
+
+ ret = exynos_drm_non_kms_register(EXYNOS_DRM_NON_KMS_G2D);
+ if (ret)
+ return ret;
+
+ ret = platform_driver_register(&g2d_driver);
+ if (ret)
+ exynos_drm_non_kms_unregister(EXYNOS_DRM_NON_KMS_G2D);
+
+ return ret;
+}
+
+static void exynos_g2d_exit(void)
+{
+ platform_driver_unregister(&g2d_driver);
+}
+
+module_init(exynos_g2d_init);
+module_exit(exynos_g2d_exit);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
index c6a013f..0cbed55 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
@@ -1799,3 +1799,15 @@ struct platform_driver gsc_driver = {
},
};
+static int gsc_driver_init(void)
+{
+ return platform_driver_register(&gsc_driver);
+}
+
+static void gsc_driver_exit(void)
+{
+ platform_driver_unregister(&gsc_driver);
+}
+
+module_init(gsc_driver_init);
+module_exit(gsc_driver_exit);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index 00d74b1..559ee65 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -102,7 +102,7 @@ static LIST_HEAD(exynos_drm_ippdrv_list);
static DEFINE_MUTEX(exynos_drm_ippdrv_lock);
static BLOCKING_NOTIFIER_HEAD(exynos_drm_ippnb_list);
-int exynos_platform_device_ipp_register(void)
+static int exynos_platform_device_ipp_register(void)
{
struct platform_device *pdev;
@@ -118,7 +118,7 @@ int exynos_platform_device_ipp_register(void)
return 0;
}
-void exynos_platform_device_ipp_unregister(void)
+static void exynos_platform_device_ipp_unregister(void)
{
if (exynos_drm_ipp_pdev) {
platform_device_unregister(exynos_drm_ipp_pdev);
@@ -1718,6 +1718,7 @@ static int ipp_probe(struct platform_device *pdev)
/* set sub driver informations */
subdrv = &ctx->subdrv;
+ subdrv->device_type = EXYNOS_DRM_NON_KMS_IPP;
subdrv->dev = dev;
subdrv->probe = ipp_subdrv_probe;
subdrv->remove = ipp_subdrv_remove;
@@ -1773,3 +1774,37 @@ struct platform_driver ipp_driver = {
},
};
+static int ipp_driver_init(void)
+{
+ int ret;
+
+ ret = exynos_drm_non_kms_register(EXYNOS_DRM_NON_KMS_IPP);
+ if (ret)
+ return ret;
+
+ ret = exynos_platform_device_ipp_register();
+ if (ret)
+ goto err_unregister_non_kms;
+
+ ret = platform_driver_register(&ipp_driver);
+ if (ret)
+ goto err_unregister_ipp_device;
+
+ return ret;
+
+err_unregister_ipp_device:
+ exynos_platform_device_ipp_unregister();
+err_unregister_non_kms:
+ exynos_drm_non_kms_unregister(EXYNOS_DRM_NON_KMS_IPP);
+
+ return ret;
+}
+
+static void ipp_driver_exit(void)
+{
+ platform_driver_unregister(&ipp_driver);
+}
+
+module_init(ipp_driver_init);
+module_exit(ipp_driver_exit);
+
diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
index b6a37d4..ffa0166 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_rotator.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
@@ -854,3 +854,16 @@ struct platform_driver rotator_driver = {
.of_match_table = exynos_rotator_match,
},
};
+
+static int rotator_driver_init(void)
+{
+ return platform_driver_register(&rotator_driver);
+}
+
+static void rotator_driver_exit(void)
+{
+ platform_driver_unregister(&rotator_driver);
+}
+
+module_init(rotator_driver_init);
+module_exit(rotator_driver_exit);
--
1.7.9.5
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