change screen resolution

change screen resolution

[Alexander Keller]

[-- Attachment #1: Type: text/plain, Size: 356 bytes --]

Hello, 

 

                I was just wondering, I have a touchscreen that has a
resolution of 800x400 pixels. However, the default in yocto is 640x480
pixels. Is there a way in yocto to change the screen resolution to match my
touchscreen display? I am using an imx6qsabreard  machine. 

 

Thanks for your help, 

 

Alexander Keller 


[-- Attachment #2: Type: text/html, Size: 2252 bytes --]

Re: change screen resolution

[Otavio Salvador]

On Sat, May 4, 2013 at 6:28 PM, Alexander Keller <alexan3@vt.edu> wrote:
>                 I was just wondering, I have a touchscreen that has a
> resolution of 800x400 pixels. However, the default in yocto is 640x480
> pixels. Is there a way in yocto to change the screen resolution to match my
> touchscreen display? I am using an imx6qsabreard  machine.

Yes you can pass the boot params to kernel for it to configure it. You
may need to add support for the mode if it is not supported by the
kernel.

I think the release notes of the BSP should provide the boot params,
but I didn't verify.

Regards,

--
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Re: change screen resolution

[He Zheng]

[-- Attachment #1: Type: text/plain, Size: 873 bytes --]

What interface (HDMI, LVDS, etc) are you using for this touchscreen?
If it's HDMI, you will not get exact 800x400 resolution since latest BSP
package doesn't support that resolution.

Thanks,
He


On Sat, May 4, 2013 at 2:28 PM, Alexander Keller <alexan3@vt.edu> wrote:

> Hello, ****
>
> ** **
>
>                 I was just wondering, I have a touchscreen that has a
> resolution of 800x400 pixels. However, the default in yocto is 640x480
> pixels. Is there a way in yocto to change the screen resolution to match my
> touchscreen display? I am using an imx6qsabreard  machine. ****
>
> ** **
>
> Thanks for your help, ****
>
> ** **
>
> Alexander Keller ****
>
> _______________________________________________
> meta-freescale mailing list
> meta-freescale@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/meta-freescale
>
>

[-- Attachment #2: Type: text/html, Size: 1756 bytes --]

Re: change screen resolution

[Alexander Keller]

[-- Attachment #1: Type: text/plain, Size: 1317 bytes --]

Yes we are using HDMI. That makes sense because when I changed the u-boot
settings I could never get the resolution to be 800x400. What resolutions
are supported by the latest BSP?

 

-Alexander Keller 

 

From: He Zheng [mailto:totoroghost@gmail.com] 
Sent: Monday, May 06, 2013 1:27 PM
To: Alexander Keller
Cc: meta-freescale@yoctoproject.org
Subject: Re: [meta-freescale] change screen resolution

 

What interface (HDMI, LVDS, etc) are you using for this touchscreen?

If it's HDMI, you will not get exact 800x400 resolution since latest BSP
package doesn't support that resolution.

 

Thanks,

He

 

On Sat, May 4, 2013 at 2:28 PM, Alexander Keller <alexan3@vt.edu
<mailto:alexan3@vt.edu> > wrote:

Hello, 

 

                I was just wondering, I have a touchscreen that has a
resolution of 800x400 pixels. However, the default in yocto is 640x480
pixels. Is there a way in yocto to change the screen resolution to match my
touchscreen display? I am using an imx6qsabreard  machine. 

 

Thanks for your help, 

 

Alexander Keller 


_______________________________________________
meta-freescale mailing list
meta-freescale@yoctoproject.org <mailto:meta-freescale@yoctoproject.org> 
https://lists.yoctoproject.org/listinfo/meta-freescale

 


[-- Attachment #2: Type: text/html, Size: 5197 bytes --]

Re: change screen resolution

[He Zheng]

[-- Attachment #1: Type: text/plain, Size: 2202 bytes --]

Alexander,

Freescale's Linux BSP(1.1.0) supports only the below mentioned resolutions
for HDMI display.

1280x720p-59

1280x1024p-60

1024x768p-60

2880x480p-60

1920x1080p-24

1920x1080p-50

1280x720p-50

720x576p-50

720x576p-50

1920x1080p-60

1440x240p-60

1280x720p-60

720x480p-60

720x480p-60

640x480p-60

---------------------------------------------------------------------------------
Now, they released L3.0.35_4.0.0, I haven't check with this package yet.

Also, you can use following command to double check the resolutions
supported on your board.
cat /sys/devices/platform/mxc_sdc_fb.0/graphics/fb0/modes

Cheers,
He


On Tue, May 14, 2013 at 8:11 AM, Alexander Keller <alexan3@vt.edu> wrote:

> Yes we are using HDMI. That makes sense because when I changed the u-boot
> settings I could never get the resolution to be 800x400. What resolutions
> are supported by the latest BSP?****
>
> ** **
>
> -Alexander Keller ****
>
> ** **
>
> *From:* He Zheng [mailto:totoroghost@gmail.com]
> *Sent:* Monday, May 06, 2013 1:27 PM
> *To:* Alexander Keller
> *Cc:* meta-freescale@yoctoproject.org
> *Subject:* Re: [meta-freescale] change screen resolution****
>
> ** **
>
> What interface (HDMI, LVDS, etc) are you using for this touchscreen?****
>
> If it's HDMI, you will not get exact 800x400 resolution since latest BSP
> package doesn't support that resolution.****
>
> ** **
>
> Thanks,****
>
> He****
>
> ** **
>
> On Sat, May 4, 2013 at 2:28 PM, Alexander Keller <alexan3@vt.edu> wrote:**
> **
>
> Hello, ****
>
>  ****
>
>                 I was just wondering, I have a touchscreen that has a
> resolution of 800x400 pixels. However, the default in yocto is 640x480
> pixels. Is there a way in yocto to change the screen resolution to match my
> touchscreen display? I am using an imx6qsabreard  machine. ****
>
>  ****
>
> Thanks for your help, ****
>
>  ****
>
> Alexander Keller ****
>
>
> _______________________________________________
> meta-freescale mailing list
> meta-freescale@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/meta-freescale****
>
> ** **
>

[-- Attachment #2: Type: text/html, Size: 5217 bytes --]