[RFC PATCH v1 1/4] drm: rockchip: add a common subdrv interfaces

Yakir Yang
2016-03-21T09:40:25Z

Introduce a common subdrv register/unregister interfaces, help
external driver to hook the drm open/close event.

Signed-off-by: Yakir Yang <ykk@rock-chips.com>
---
drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 49 +++++++++++++++++++++++++++++
drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 15 +++++++++
2 files changed, 64 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 896da09..4e0feb2 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -36,6 +36,8 @@
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0

+static LIST_HEAD(rockchip_drm_subdrv_list);
+
/*
* Attach a (component) device to the shared drm dma mapping from master drm
* device. This is used by the VOPs to map GEM buffers to a common DMA
@@ -251,6 +253,51 @@ static int rockchip_drm_unload(struct drm_device *drm_dev)
return 0;
}

+int rockchip_register_subdrv(struct drm_rockchip_subdrv *subdrv)
+{
+ if (!subdrv)
+ return -EINVAL;
+
+ list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rockchip_register_subdrv);
+
+int rockchip_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
+{
+ if (!subdrv)
+ return -EINVAL;
+
+ list_del(&subdrv->list);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rockchip_unregister_subdrv);
+
+static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
+{
+ struct drm_rockchip_subdrv *subdrv;
+ int ret = 0;
+
+ list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
+ ret = subdrv->open(dev, subdrv->dev, file);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void rockchip_drm_preclose(struct drm_device *dev,
+ struct drm_file *file)
+{
+ struct drm_rockchip_subdrv *subdrv;
+
+ list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
+ subdrv->close(dev, subdrv->dev, file);
+}
+
void rockchip_drm_lastclose(struct drm_device *dev)
{
struct rockchip_drm_private *priv = dev->dev_private;
@@ -281,6 +328,8 @@ static struct drm_driver rockchip_drm_driver = {
DRIVER_PRIME | DRIVER_ATOMIC,
.load = rockchip_drm_load,
.unload = rockchip_drm_unload,
+ .open = rockchip_drm_open,
+ .preclose = rockchip_drm_preclose,
.lastclose = rockchip_drm_lastclose,
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = rockchip_drm_crtc_enable_vblank,
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index 3529f69..5ea5fcb 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -42,6 +42,17 @@ struct rockchip_crtc_funcs {
void (*wait_for_update)(struct drm_crtc *crtc);
};

+struct drm_rockchip_subdrv {
+ struct list_head list;
+ struct device *dev;
+ struct drm_device *drm_dev;
+
+ int (*open)(struct drm_device *drm_dev, struct device *dev,
+ struct drm_file *file);
+ void (*close)(struct drm_device *drm_dev, struct device *dev,
+ struct drm_file *file);
+};
+
struct rockchip_atomic_commit {
struct work_struct work;
struct drm_atomic_state *state;
@@ -73,4 +84,8 @@ int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
struct device *dev);
void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
struct device *dev);
+
+int rockchip_register_subdrv(struct drm_rockchip_subdrv *subdrv);
+int rockchip_unregister_subdrv(struct drm_rockchip_subdrv *subdrv);
+
#endif /* _ROCKCHIP_DRM_DRV_H_ */
--
1.9.1