Re: [PATCH] drm/meson: add support for 2560x1440 resolution output
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: 2025-09-28 21:24:12
Also in:
dri-devel, linux-amlogic, lkml
Hi Christian, On Sat, Sep 27, 2025 at 3:02 PM Christian Hewitt [off-list ref] wrote: [...]
quoted hunk ↗ jump to hunk
@@ -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