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/*
* ARM HDLCD Controller register definition
*/
#ifndef __HDLCD_DRV_H__
#define __HDLCD_DRV_H__
struct hdlcd_bo {
struct drm_gem_object gem;
dma_addr_t dma_addr;
void *cpu_addr;
};
struct hdlcd_drm_private {
void __iomem *mmio;
struct clk *clk;
struct drm_fb_helper *fb_helper;
struct hdlcd_bo *bo;
struct drm_pending_vblank_event *event;
struct drm_crtc crtc;
struct device_node *slave_node;
struct completion frame_completion;
#ifdef CONFIG_DEBUG_FS
atomic_t buffer_underrun_count;
atomic_t bus_error_count;
atomic_t vsync_count;
atomic_t dma_end_count;
#endif
int dpms;
bool initialised;
};
#define to_hdlcd_bo_obj(x) container_of(x, struct hdlcd_bo, gem)
#define crtc_to_hdlcd_priv(x) container_of(x, struct hdlcd_drm_private, crtc)
static inline void
hdlcd_write(struct hdlcd_drm_private *hdlcd, unsigned int reg, u32 value)
{
writel(value, hdlcd->mmio + reg);
}
static inline u32 hdlcd_read(struct hdlcd_drm_private *hdlcd, unsigned int reg)
{
return readl(hdlcd->mmio + reg);
}
/*
* Developers using HDLCD may wish to enable these settings if
* display disruption is apparent and you suspect HDLCD
* access to RAM may be starved.
*
* Turn HDLCD default color to red instead of default black so
* that it's easier to see data underruns (compared to other
* visual disruptions)
*/
#define HDLCD_SHOW_UNDERRUN
/* setup the crtc subclass */
int hdlcd_setup_crtc(struct drm_device *dev);
/* functions for creating a suitable connector */
extern int hdlcd_create_digital_connector(struct drm_device *dev,
struct hdlcd_drm_private *hdlcd);
extern int hdlcd_create_vexpress_connector(struct drm_device *dev,
struct hdlcd_drm_private *hdlcd);
#ifdef CONFIG_DRM_VIRTUAL_HDLCD
extern int hdlcd_create_virtual_connector(struct drm_device *dev);
#else
static inline int hdlcd_create_virtual_connector(struct drm_device *dev)
{
return -ENXIO;
}
#endif
void hdlcd_set_scanout(struct hdlcd_drm_private *hdlcd, bool wait);
void hdlcd_drm_mode_config_init(struct drm_device *dev);
int hdlcd_fbdev_init(struct drm_device *dev);
/* common function used by all connectors */
extern struct drm_encoder *hdlcd_connector_best_encoder(struct drm_connector *con);
#endif /* __HDLCD_DRV_H__ */
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