mx6 hdmi resolution behaviour

Fabio Estevam festevam at
Tue Jun 23 15:04:24 PDT 2015

On Tue, Jun 23, 2015 at 5:58 PM, Russell King - ARM Linux
<linux at> wrote:

>> That's the point that makes me confused: shouldn't it report a higher
>> resolution like 1080p?
> No - it won't go higher than the initial mode that was set.  See
> drm_fb_helper_hotplug_event():
>         max_width = fb_helper->fb->width;
>         max_height = fb_helper->fb->height;
>         drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height);
> This calls connector->funcs->fill_modes with the max width/height,
> which calls down into drm_helper_probe_single_connector_modes_merge_bits()
> and there's limitations in there which means that we won't try to
> increase the size of the framebuffer.

Got it, thanks for the clarification, Russell.

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