From mboxrd@z Thu Jan 1 00:00:00 1970 From: 914059751@qq.com (=?gbk?B?uvrR7sr3?=) Date: Tue, 9 Mar 2010 08:58:00 +0800 Subject: Query abut 2410 LCD configuration Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Im wondering these values DOES make any sense ? ------------------ Original ------------------ From: "gianluca"; Date: Mon, Mar 8, 2010 10:32 PM To: "???"<914059751@qq.com>; Cc: "linux-arm-kernel"; Subject: Re: Query abut 2410 LCD configuration ??? wrote: > 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! Maybe the LQ080... datasheet? or other platform driver with the same LCD configuration, or they simply came from tests. Regards, -- ,,, (o o) ======oOO==(_)==OOo====== Gianluca Renzi R&D phone: +39.0542.609120 fax: +39.0542.609212 .oooO Oooo. ======( )==( )======= \ ( ) / \_) (_/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel at lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -------------- next part -------------- An HTML attachment was scrubbed... URL: