diff options
| author | Neil Armstrong | 2019-03-20 09:11:10 +0100 |
|---|---|---|
| committer | Neil Armstrong | 2019-03-25 11:19:50 +0100 |
| commit | 3d565a21f2ce1f37479e91914734478c39b5c6fc (patch) | |
| tree | 50cf860cc67e422c1ddeac3cbad704424825882f /drivers/gpu | |
| parent | 2d8f92897ad816f5dda54b2ed2fd9f2d7cb1abde (diff) | |
drm/meson: fix TMDS clock filtering for DMT monitors
DMT monitors does not necessarely report a maximum TMDS clock
in a VSDB EDID extension.
In this case, all modes are wrongly rejected, including
the DRM fallback EDID.
This patch only rejects modes whith clock > max_tmds_clock if
the max_tmds_clock is specified. This will only reject
4:2:0 HDMI2.0 modes, who reports a clock > max_tmds_clock.
Reported-by: Maxime Jourdan <mjourdan@baylibre.com>
Fixes: d7d8fb7046b6 ("drm/meson: add HDMI div40 TMDS mode")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Maxime Jourdan <mjourdan@baylibre.com>
Reviewed-by: Maxime Jourdan <mjourdan@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190320081110.1718-1-narmstrong@baylibre.com
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_dw_hdmi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c index e28814f4ea6c..563953ec6ad0 100644 --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c @@ -569,7 +569,8 @@ dw_hdmi_mode_valid(struct drm_connector *connector, DRM_DEBUG_DRIVER("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); /* If sink max TMDS clock, we reject the mode */ - if (mode->clock > connector->display_info.max_tmds_clock) + if (connector->display_info.max_tmds_clock && + mode->clock > connector->display_info.max_tmds_clock) return MODE_BAD; /* Check against non-VIC supported modes */ |