i.MX ProcessorsのトピックRe: How can I set 854x480 parallel LCD panel ?

How can I set 854x480 parallel LCD panel ?

leeinchul — Tue, 27 Jan 2015 00:49:40 GMT

Hi, all.

I want to set 854x480 parallel LCD panel. So, I set parameters as the below.

1. Is it correcting set?

2. I cannot understand variables, ".interface_pix_fmt", "default_bpp". Would you give me some information about this

Thanks and best regards.

.................................................................................................................................

[u-boot]

bootargs_nfs_rgb24=setenv bootargs ${bootargs_base} root=/dev/nfs ip=${ipaddr}:${gatewayip}:${netmask}:${hostname}:eth0::off rw nfsroot=${serverip}:${rootpath},v3,tcp video=mxcfb0:dev=lcd,ARHUD-PGU,if=RGB24 video=mxcfb1:off video=mxcfb2:off

[board_mx6q_sabreauto.c]

static struct ipuv3_fb_platform_data sabr_fb_data[] = {

{ /*fb0*/

.disp_dev = "lcd",

.interface_pix_fmt = IPU_PIX_FMT_RGB24,

.mode_str = "ARHUD-PGU",

.default_bpp = 16,

.int_clk = false,

},{ /*fb1*/

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-XGA",

.default_bpp = 16,

.int_clk = false,

}, { /*fb2*/

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-XGA",

.default_bpp = 16,

.int_clk = false,

};

[mxc_lcdif.c]

static struct fb_videomode lcdif_modedb[] = {

{

/* 800x480 @ 57 Hz , pixel clk @ 27MHz */

"CLAA-WVGA", 57, 800, 480, 37037, 40, 60, 10, 10, 20, 10,

FB_SYNC_CLK_LAT_FALL,

FB_VMODE_NONINTERLACED,

0,},

{

/* 800x480 @ 60 Hz , pixel clk @ 32MHz */

"SEIKO-WVGA", 60, 800, 480, 29850, 89, 164, 23, 10, 10, 10,

FB_SYNC_CLK_LAT_FALL,

FB_VMODE_NONINTERLACED,

0,},

{

/* 854x480 @ 60 Hz , pixel clk @ 32MHz */

"ARHUD-PGU", 60, 854, 480, 29850, 89, 164, 23, 10, 10, 10,

FB_SYNC_CLK_LAT_FALL,

FB_VMODE_NONINTERLACED,

0,},

};

Re: How can I set 854x480 parallel LCD panel ?

Yuri — Tue, 27 Jan 2015 02:31:05 GMT

You may look at app note AN3974 “Different Display Configurations on

i.MX35 Linux PDK” regarding Linux framebuffer structures.

http://cache.freescale.com/files/dsp/doc/app_note/AN3974.pdf

“interface_pix_fmt" - defines format of memory, reserved for pixel.

"default_bpp" – default bits per pixel parameter.

Have a great day,

Yuri

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Re: How can I set 854x480 parallel LCD panel ?

leeinchul — Tue, 27 Jan 2015 02:46:50 GMT

Hi, Yuri.

Thank you for your reference.

Have a nice day.

Inchul.

Re: How can I set 854x480 parallel LCD panel ?

eugenevolkov — Mon, 04 May 2015 12:43:40 GMT

Hi, Yuri!

I configure parallel LCD in my board. I use 3.10.53_1.1.0-ga relise.

But, i not find board_mx6q_sabreauto.c file

May meant the mx6q_sabreauto.dtsi file?

Re: How can I set 854x480 parallel LCD panel ?

Yuri — Tue, 05 May 2015 04:13:41 GMT

Yes,

"For the i.MX 6Quad/6DualLite/6SoloLite/6SoloX, the board specific
configuration options for the driver are set in:

arch/arm/boot/dts/imx6*.dtsi

arch/arm/boot/dts/imx6*.dts"

Regards,

Yuri.