Android driver not support 5:4 resolution only support 4:3 and 16:9 resolution

wangtsungli — Mon, 27 Aug 2018 14:11:27 GMT

Hi Community,

I'm working on i.MX6 Quad sabreSD platform and build Android 6.0 as my image.

Here is the situation that I can not solve now.

Android kernel driver will set HDMI resolution parameter in mxc_edid.c.

Take the one setting for instance.

Below is 1280*720 resolution settings.

/* #4: 1280x720p@59.94/60Hz 16:9 */
[4] = {
NULL, 60, 1280, 720, 13468, 220, 110, 20, 5, 40, 5,
FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
FB_VMODE_NONINTERLACED | FB_VMODE_ASPECT_16_9, 0
},

For 1280x720p resolution it support FB_VMODE_ASPECT_16_9.

And for other resolution such as 720x480p resolution it suport FB_VMODE_ASPECT_4_3.

But today I need to set a resolution for 1280x1024, this resolution would need support FB_VMODE_ASPECT_5_4.

But Android kernel driver seems not support this kind of mode, it means that there is no FB_VMODE_ASPECT_5_4 that I could defined.

For this situation how can I display 1280x1024?

Please help!

Thanks in Advanced!

Re: Android driver not support 5:4 resolution only support 4:3 and 16:9 resolution

igorpadykov — Mon, 27 Aug 2018 23:57:16 GMT

Hi tsung

1280x1024 is not listed in Table 33-3. Video Modes i.MX6DQ Reference Manual

http://www.nxp.com/docs/en/reference-manual/IMX6DQRM.pdf

One can try workarounds developed for example by boundary devices:

i.MX6 HDMI audio - Boundary Devices

HDMI CEA mode - Boundary Devices

Best regards
igor
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i.MX ProcessorsのトピックAndroid driver not support 5:4 resolution only support 4:3 and 16:9 resolution

Android driver not support 5:4 resolution only support 4:3 and 16:9 resolution

Re: Android driver not support 5:4 resolution only support 4:3 and 16:9 resolution