[PATCH] drm/meson: add support for 2560x1440 resolution output

[Martin Blumenstingl]

Hi Christian,

On Sat, Sep 27, 2025 at 3:02 PM Christian Hewitt
<christianshewitt at gmail.com> wrote:
[...]
> @@ -894,6 +908,10 @@ static void meson_vclk_set(struct meson_drm *priv,
>                         m = 0xf7;
>                         frac = vic_alternate_clock ? 0x8148 : 0x10000;
>                         break;
> +               case 4830000:
> +                       m = 0xc9;
> +                       frac = 0xd560;
> +                       break;
Initially I thought this was wrong because it's only added for the
G12A (which is also used on G12B and SM1) code-path, leaving out the
GX SoCs.

Was the 2560x1440 mode tested on a computer monitor or a TV?
I suspect it's the former, so I think it expected the code to take the
MESON_VCLK_TARGET_DMT path, which automatically calculates m and frac.

I'll give it a try on Friday as I do have a computer monitor with that
resolution - so any hints for testing are welcome!


Best regards,
Martin