Query abut 2410 LCD configuration

[胡杨树]

Hi all:)

      In arch/arm/mach-s3c2410/include/mach/fb.h, struct s3c2410fb_display defines lcd configurations, 
      Can figure out where does these values following pixclock come from?


/* LCD description */
struct s3c2410fb_display {
	/* LCD type */
	unsigned type;

	/* Screen size */
	unsigned short width;
	unsigned short height;

	/* Screen info */
	unsigned short xres;
	unsigned short yres;
	unsigned short bpp;

	unsigned pixclock;		/* pixclock in picoseconds */
	unsigned short left_margin;  /* value in pixels (TFT) or HCLKs (STN) */
	unsigned short right_margin; /* value in pixels (TFT) or HCLKs (STN) */
	unsigned short hsync_len;    /* value in pixels (TFT) or HCLKs (STN) */
	unsigned short upper_margin;	/* value in lines (TFT) or 0 (STN) */
	unsigned short lower_margin;	/* value in lines (TFT) or 0 (STN) */
	unsigned short vsync_len;	/* value in lines (TFT) or 0 (STN) */

	/* lcd configuration registers */
	unsigned long	lcdcon5;
};



      Take LQ080V3DG01 for example,

-----------------             arch/arm/mach-s3c2410/mach-qt2410.c     ----------------------------
		/* Configuration for 640x480 SHARP LQ080V3DG01 */
		.lcdcon5 = S3C2410_LCDCON5_FRM565 |
			   S3C2410_LCDCON5_INVVLINE |
			   S3C2410_LCDCON5_INVVFRAME |
			   S3C2410_LCDCON5_PWREN |
			   S3C2410_LCDCON5_HWSWP,

		.type		= S3C2410_LCDCON1_TFT,
		.width		= 640,
		.height		= 480,

		.pixclock	= 40000, /* HCLK/4 */
		.xres		= 640,
		.yres		= 480,
		.bpp		= 16,
		.left_margin	= 44,
		.right_margin	= 116,
		.hsync_len	= 96,
		.upper_margin	= 19,
		.lower_margin	= 11,
		.vsync_len	= 15,
	},

pixclock is 40000 in picoseconds , 1/(40000*10^-12) = 25MHz, that correspond with LQ080V3DG01 clock frequency ranges.

wondering where does the rest of values come from?
any tips/ideas would be appreciated!

thanks
BR