* Query abut 2410 LCD configuration
@ 2010-03-08 14:24 胡杨树
2010-03-08 14:32 ` gianluca
2010-11-24 0:34 ` Ben Dooks
0 siblings, 2 replies; 5+ messages in thread
From: 胡杨树 @ 2010-03-08 14:24 UTC (permalink / raw)
To: linux-arm-kernel
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
^ permalink raw reply [flat|nested] 5+ messages in thread
* Query abut 2410 LCD configuration
2010-03-08 14:24 胡杨树
@ 2010-03-08 14:32 ` gianluca
2010-11-24 0:34 ` Ben Dooks
1 sibling, 0 replies; 5+ messages in thread
From: gianluca @ 2010-03-08 14:32 UTC (permalink / raw)
To: linux-arm-kernel
??? 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.
======( )==( )=======
\ ( ) /
\_) (_/
^ permalink raw reply [flat|nested] 5+ messages in thread
* Query abut 2410 LCD configuration
@ 2010-03-09 0:58 胡杨树
2010-03-12 10:38 ` gianluca
0 siblings, 1 reply; 5+ messages in thread
From: 胡杨树 @ 2010-03-09 0:58 UTC (permalink / raw)
To: linux-arm-kernel
Im wondering these values DOES make any sense ?
------------------ Original ------------------
From: "gianluca"<gianlucarenzi@eurekelettronica.it>;
Date: Mon, Mar 8, 2010 10:32 PM
To: "???"<914059751@qq.com>;
Cc: "linux-arm-kernel"<linux-arm-kernel@lists.infradead.org>;
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
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Query abut 2410 LCD configuration
2010-03-09 0:58 Query abut 2410 LCD configuration 胡杨树
@ 2010-03-12 10:38 ` gianluca
0 siblings, 0 replies; 5+ messages in thread
From: gianluca @ 2010-03-12 10:38 UTC (permalink / raw)
To: linux-arm-kernel
?????? wrote:
> Im wondering these values DOES make any sense ?
Googling around you can find these settings for a board based on s3c2440
I think you can compare it with yours and noting the differences for
you. What is the best configuration you get?
/* 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 = 166667, /* HCLK/4 */
.xres = 640,
.yres = 480,
.bpp = 16,
.left_margin = 48,
.right_margin = 18,
.hsync_len = 4,
.upper_margin = 33,
.lower_margin = 10,
.vsync_len = 4,
Best luck!
--
,,,
(o o)
======oOO==(_)==OOo======
Gianluca Renzi
R&D
phone: +39.0542.609120
fax: +39.0542.609212
.oooO Oooo.
======( )==( )=======
\ ( ) /
\_) (_/
^ permalink raw reply [flat|nested] 5+ messages in thread
* Query abut 2410 LCD configuration
2010-03-08 14:24 胡杨树
2010-03-08 14:32 ` gianluca
@ 2010-11-24 0:34 ` Ben Dooks
1 sibling, 0 replies; 5+ messages in thread
From: Ben Dooks @ 2010-11-24 0:34 UTC (permalink / raw)
To: linux-arm-kernel
On 08/03/10 14:24, ??? 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)
these values are generally found from the panel's data sheet, detailing
the size of the borders and the length of the sync pulses. These relate
to the standard framebuffer parameters
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2010-03-09 0:58 Query abut 2410 LCD configuration 胡杨树
2010-03-12 10:38 ` gianluca
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2010-11-24 0:34 ` Ben Dooks
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