Re: [PATCH v5 5/5] drm: rockchip: add fixed screen size DVI-D support for rk3066 hdmi

[Heiko Stuebner]

Hi Johan,

Am Donnerstag, 21. März 2019, 01:14:40 CEST schrieb Johan Jonker:
> Add fixed screen size DVI-D support
> for rk3066 hdmi with an extra patch.
> 
> Signed-off-by: Johan Jonker <jbx6244@xxxxxxxxx>

> +static const struct drm_display_mode edid_cea_modes[] = {
> +	/* 4 - 1280x720@60Hz 16:9 */
> +	{ DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1390,
> +		   1430, 1650, 0, 720, 725, 730, 750, 0,
> +		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
> +	  .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
> +};

you already dropped this patch from v6, but just for completeness sake,
I don't think there should be a static mode for dvi displays.

Similar to hdmi, dvi also can use ddc to read the monitor edid and some
sort of static mode might behave badly if for example a display with less
than this 720p is connected.

I think I remember reading in the Rockchip tree that they added that for
the case reading the edid fails, but if that happens the reading should
be fixed and not worked around a failure :-)


Heiko