From 8cadab0a2adc612692c7ad8a176881732fa25e2a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 28 Sep 2016 16:51:43 +0300 Subject: [PATCH] drm/i915: Account for sink max TMDS clock when checking the port clock MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit It's perfectly legal for the sink to support 12bpc only for some lower resolution modes, while the higher resolution modes can only be used with 8bpc. So let's take the sink's max TMDS clock into account before we go and decide that a particular mode can be used with 12bpc. Signed-off-by: Ville Syrjälä Reviewed-by: Ander Conselvan de Oliveira Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1475070703-6435-11-git-send-email-ville.syrjala@linux.intel.com --- drivers/gpu/drm/i915/intel_hdmi.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index c51073f78730..f40a35f2913a 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1220,10 +1220,17 @@ static int hdmi_port_clock_limit(struct intel_hdmi *hdmi, int max_tmds_clock = intel_hdmi_source_max_tmds_clock(to_i915(dev)); if (respect_downstream_limits) { + struct intel_connector *connector = hdmi->attached_connector; + const struct drm_display_info *info = &connector->base.display_info; + if (hdmi->dp_dual_mode.max_tmds_clock) max_tmds_clock = min(max_tmds_clock, hdmi->dp_dual_mode.max_tmds_clock); - if (!hdmi->has_hdmi_sink) + + if (info->max_tmds_clock) + max_tmds_clock = min(max_tmds_clock, + info->max_tmds_clock); + else if (!hdmi->has_hdmi_sink) max_tmds_clock = min(max_tmds_clock, 165000); } -- 2.20.1