From 3565c7219c169ab6c6ef34ba9187c1b7bc6dbfa5 Mon Sep 17 00:00:00 2001 From: Ankit Nautiyal Date: Thu, 21 Jul 2022 14:16:45 +0530 Subject: drm/i915/hdmi: Prune modes that require HDMI2.1 FRL HDMI2.1 requires some higher resolution video modes to be enumerated only if HDMI2.1 Fixed Rate Link (FRL) is supported. Current platforms do not support FRL transmission so prune modes that require HDMI2.1 FRL. v2: Fixed the condition to check for dotclock > 600. Return MODE_CLOCK_HIGH as mode status. Signed-off-by: Ankit Nautiyal Reviewed-by: Arun R Murthy (v1) Signed-off-by: Uma Shankar Link: https://patchwork.freedesktop.org/patch/msgid/20220721084645.3411219-1-ankit.k.nautiyal@intel.com --- drivers/gpu/drm/i915/display/intel_hdmi.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index cb6898cbe1c8..872316ef895e 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -2000,6 +2000,15 @@ intel_hdmi_mode_valid(struct drm_connector *connector, clock *= 2; } + /* + * HDMI2.1 requires higher resolution modes like 8k60, 4K120 to be + * enumerated only if FRL is supported. Current platforms do not support + * FRL so prune the higher resolution modes that require doctclock more + * than 600MHz. + */ + if (clock > 600000) + return MODE_CLOCK_HIGH; + ycbcr_420_only = drm_mode_is_420_only(&connector->display_info, mode); status = intel_hdmi_mode_clock_valid(connector, clock, has_hdmi_sink, ycbcr_420_only); -- cgit v1.2.3