diff options
Diffstat (limited to 'drivers/gpu/drm/arm/hdlcd_drv.h')
| -rw-r--r-- | drivers/gpu/drm/arm/hdlcd_drv.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arm/hdlcd_drv.h b/drivers/gpu/drm/arm/hdlcd_drv.h new file mode 100644 index 000000000000..3fc3bddbb841 --- /dev/null +++ b/drivers/gpu/drm/arm/hdlcd_drv.h @@ -0,0 +1,82 @@ +/* + * 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__ */ |