L一
mx51 LCD driver 分析
以下为要用到的结构体
struct mxcfb_data {
struct fb_info *fbi;
struct fb_info *fbi_ovl;
volatile int32_t vsync_flag;
wait_queue_head_t vsync_wq;
wait_queue_head_t suspend_wq;
bool suspended;
int backlight_level;
};
static struct mxcfb_data mxcfb_drv_data;
58 struct mxcfb_info {
59 int blank;
60 ipu_channel_t ipu_ch;
61 uint32_t ipu_ch_irq;
62 uint32_t cur_ipu_buf;
63
64 u32 pseudo_palette[16];
65
66 struct semaphore flip_sem;
67 spinlock_t fb_lock;
68 };
struct fb_bitfield {
__u32 offset; /* beginning of bitfield */
__u32 length; /* length of bitfield */
__u32 msb_right; /* != 0 : Most significant bit is */
/* right */
};
struct fb_var_screeninfo {
__u32 xres; /* visible resolution */
__u32 yres;
__u32 xres_virtual; /* virtual resolution */
__u32 yres_virtual;
__u32 xoffset; /* offset from virtual to visible */
__u32 yoffset; /* resolution */
__u32 bits_per_pixel; /* guess what */
__u32 grayscale; /* != 0 Graylevels instead of colors */
struct fb_bitfield red; /* bitfield in fb mem if true color, */
struct fb_bitfield green; /* else only length is significant */
struct fb_bitfield blue;
struct fb_bitfield transp; /* transparency */
__u32 nonstd; /* != 0 Non standard pixel format */
__u32 activate; /* see FB_ACTIVATE_* */
__u32 height; /* height of picture in mm */
__u32 width; /* width of picture in mm */
__u32 accel_flags; /* (OBSOLETE) see fb_info.flags */
/* Timing: All values in pixclocks, except pixclock (of course) */
__u32 pixclock; /* pixel clock in ps (pico seconds) */
__u32 left_margin; /* time from sync to picture */
__u32 right_margin; /* time from picture to sync */
__u32 upper_margin; /* time from sync to picture */
__u32 lower_margin;
__u32 hsync_len; /* length of horizontal sync */
__u32 vsync_len; /* length of vertical sync */
__u32 sync; /* see FB_SYNC_* */
__u32 vmode; /* see FB_VMODE_* */
__u32 rotate; /* angle we rotate counter clockwise */
__u32 reserved[5]; /* Reserved for future compatibility */
};
struct fb_fix_screeninfo {
char id[16]; /* identification string eg "TT Builtin" */
unsigned long smem_start; /* Start of frame buffer mem */
/* (physical address) */
__u32 smem_len; /* Length of frame buffer mem */
__u32 type; /* see FB_TYPE_* */
__u32 type_aux; /* Interleave for interleaved Planes */
__u32 visual; /* see FB_VISUAL_* */
__u16 xpanstep; /* zero if no hardware panning */
__u16 ypanstep; /* zero if no hardware panning */
__u16 ywrapstep; /* zero if no hardware ywrap */
__u32 line_length; /* length of a line in bytes */
unsigned long mmio_start; /* Start of Memory Mapped I/O */
/* (physical address) */
__u32 mmio_len; /* Length of Memory Mapped I/O */
__u32 accel; /* Indicate to driver which */
/* specific chip/card we have */
__u16 reserved[3]; /* Reserved for future compatibility */
};
struct fb_videomode {
const char *name; /* optional */
u32 refresh; /* optional */
u32 xres;
u32 yres;
u32 pixclock;
u32 left_margin;
u32 right_margin;
u32 upper_margin;
u32 lower_margin;
u32 hsync_len;
u32 vsync_len;
u32 sync;
u32 vmode;
u32 flag;
};
struct fb_chroma {
__u32 redx; /* in fraction of 1024 */
__u32 greenx;
__u32 bluex;
__u32 whitex;
__u32 redy;
__u32 greeny;
__u32 bluey;
__u32 whitey;
};
struct fb_monspecs {
struct fb_chroma chroma;
struct fb_videomode *modedb; /* mode database */
__u8 manufacturer[4]; /* Manufacturer */
__u8 monitor[14]; /* Monitor String */
__u8 serial_no[14]; /* Serial Number */
__u8 ascii[14]; /* ? */
__u32 modedb_len; /* mode database length */
__u32 model; /* Monitor Model */
__u32 serial; /* Serial Number - Integer */
__u32 year; /* Year manufactured */
__u32 week; /* Week Manufactured */
__u32 hfmin; /* hfreq lower limit (Hz) */
__u32 hfmax; /* hfreq upper limit (Hz) */
__u32 dclkmin; /* pixelclock lower limit (Hz) */
__u32 dclkmax; /* pixelclock upper limit (Hz) */
__u16 input; /* display type - see FB_DISP_* */
__u16 dpms; /* DPMS support - see FB_DPMS_ */
__u16 signal; /* Signal Type - see FB_SIGNAL_* */
__u16 vfmin; /* vfreq lower limit (Hz) */
__u16 vfmax; /* vfreq upper limit (Hz) */
__u16 gamma; /* Gamma - in fractions of 100 */
__u16 gtf : 1; /* supports GTF */
__u16 misc; /* Misc flags - see FB_MISC_* */
__u8 version; /* EDID version... */
__u8 revision; /* ...and revision */
__u8 max_x; /* Maximum horizontal size (cm) */
__u8 max_y; /* Maximum vertical size (cm) */
};
struct fb_pixmap {
u8 *addr; /* pointer to memory */
u32 size; /* size of buffer in bytes */
u32 offset; /* current offset to buffer */
u32 buf_align; /* byte alignment of each bitmap */
u32 scan_align; /* alignment per scanline */
u32 access_align; /* alignment per read/write (bits) */
u32 flags; /* see FB_PIXMAP_* */
u32 blit_x; /* supported bit block dimensions (1-32)*/
u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
/* blit_y = 1 << (height - 1) */
/* if 0, will be set to 0xffffffff (all)*/
/* access methods */
void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
};
struct fb_cmap {
__u32 start; /* First entry */
__u32 len; /* Number of entries */
__u16 *red; /* Red values */
__u16 *green;
__u16 *blue;
__u16 *transp; /* transparency, can be NULL */
};
struct fb_ops {
/* open/release and usage marking */
struct module *owner;
int (*fb_open)(struct fb_info *info, int user);
int (*fb_release)(struct fb_info *info, int user);
/* For framebuffers with strange non linear layouts or that do not
* work with normal memory mapped access
*/
ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
size_t count, loff_t *ppos);
ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
size_t count, loff_t *ppos);
/* checks var and eventually tweaks it to something supported,
* DO NOT MODIFY PAR */
int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
/* set the video mode according to info->var */
int (*fb_set_par)(struct fb_info *info);
/* set color register */
int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info);
/* set color registers in batch */
int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
/* blank display */
int (*fb_blank)(int blank, struct fb_info *info);
/* pan display */
int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
/* Draws a rectangle */
void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
/* Copy data from area to another */
void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
/* Draws a image to the display */
void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
/* Draws cursor */
int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
/* Rotates the display */
void (*fb_rotate)(struct fb_info *info, int angle);
/* wait for blit idle, optional */
int (*fb_sync)(struct fb_info *info);
/* perform fb specific ioctl (optional) */
int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
unsigned long arg);
/* Handle 32bit compat ioctl (optional) */
int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
unsigned long arg);
/* perform fb specific mmap */
int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
/* save current hardware state */
void (*fb_save_state)(struct fb_info *info);
/* restore saved state */
void (*fb_restore_state)(struct fb_info *info);
/* get capability given var */
void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
struct fb_var_screeninfo *var);
/* teardown any resources to do with this framebuffer */
void (*fb_destroy)(struct fb_info *info);
};
struct fb_info {
int node;
int flags;
struct mutex lock; /* Lock for open/release/ioctl funcs */
struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
struct fb_var_screeninfo var; /* Current var */
struct fb_fix_screeninfo fix; /* Current fix */
struct fb_monspecs monspecs; /* Current Monitor specs */
struct work_struct queue; /* Framebuffer event queue */
struct fb_pixmap pixmap; /* Image hardware mapper */
struct fb_pixmap sprite; /* Cursor hardware mapper */
struct fb_cmap cmap; /* Current cmap */
struct list_head modelist; /* mode list */
struct fb_videomode *mode; /* current mode */
#ifdef CONFIG_FB_BACKLIGHT
/* assigned backlight device */
/* set before framebuffer registration,
remove after unregister */
struct backlight_device *bl_dev;
/* Backlight level curve */
u8 bl_curve[FB_BACKLIGHT_LEVELS];
#endif
#ifdef CONFIG_FB_DEFERRED_IO
struct delayed_work deferred_work;
struct fb_deferred_io *fbdefio;
#endif
struct fb_ops *fbops;
struct device *device; /* This is the parent */
struct device *dev; /* This is this fb device */
int class_flag; /* private sysfs flags */
#ifdef CONFIG_FB_TILEBLITTING
struct fb_tile_ops *tileops; /* Tile Blitting */
#endif
char __iomem *screen_base; /* Virtual address */
unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
void *pseudo_palette; /* Fake palette of 16 colors */
#define FBINFO_STATE_RUNNING 0
#define FBINFO_STATE_SUSPENDED 1
u32 state; /* Hardware state i.e suspend */
void *fbcon_par; /* fbcon use-only private area */
/* From here on everything is device dependent */
void *par;
/* we need the PCI or similiar aperture base/size not
smem_start/size as smem_start may just be an object
allocated inside the aperture so may not actually overlap */
resource_size_t aperture_base;
resource_size_t aperture_size;
};