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drm/meson: venc: add support for HDMI DMT modes up to 3840x2160

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Commit 5d0bfe4484 ("drm/meson: Add HDMI 1.4 4k modes") added support
for HDMI 1.4 4k modes, which is what TVs need. For computer monitors
the code is using the DMT code-path, which ends up in
meson_venc_hdmi_supported_mode(), which does not allow the 4k modes yet.

The datasheet for all supported SoCs mentions "4Kx2K@60". It's not
clear whether "4K" here means 3840 or 4096 pixels.

Allow resolutions up to 3840x2160 pixels (including middle steps, such
as WQHD at 2560x1440 pixels) so they can be used with computer monitors
(using the DMT code-path in the driver).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20251108134236.1299630-1-martin.blumenstingl@googlemail.com
This commit is contained in:
Martin Blumenstingl
2025-11-08 14:42:36 +01:00
committed by Neil Armstrong
parent 91ce41427d
commit 26ce0b87a8
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/meson/meson_venc.c
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@@ -868,10 +868,10 @@ meson_venc_hdmi_supported_mode(const struct drm_display_mode *mode)
DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC))
return MODE_BAD;
if (mode->hdisplay < 400 || mode->hdisplay > 1920)
if (mode->hdisplay < 400 || mode->hdisplay > 3840)
return MODE_BAD_HVALUE;
if (mode->vdisplay < 480 || mode->vdisplay > 1920)
if (mode->vdisplay < 480 || mode->vdisplay > 2160)
return MODE_BAD_VVALUE;
return MODE_OK;