diff options
| author | Ville Syrjälä | 2020-01-08 20:12:39 +0200 |
|---|---|---|
| committer | Ville Syrjälä | 2020-07-09 16:23:02 +0300 |
| commit | c35ad31401c079e1fe1bebb1b7d5be2940668676 (patch) | |
| tree | 06088200d2def72a17599b84c7cddbdf6907b698 /drivers/gpu/drm/i915 | |
| parent | 90f8ed85c6f31a53d8bdf04d80900d87296f6701 (diff) | |
drm/i915: Reject DRM_MODE_FLAG_DBLCLK with DVI sinks
The code assumes that DRM_MODE_FLAG_DBLCLK means that we enable the
pixel repeat feature. That only works with HDMI since it requires
AVI infoframe to signal the information to the sink. Hence even if
the mode dotclock would be valid we cannot currently assume that
we can just ignore the DBLCLK flag. Reject it for DVI sinks.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200108181242.13650-6-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_hdmi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index 8e9abb28072c..7dc11ea4c6e4 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -2242,8 +2242,11 @@ intel_hdmi_mode_valid(struct drm_connector *connector, if (clock > max_dotclk) return MODE_CLOCK_HIGH; - if (mode->flags & DRM_MODE_FLAG_DBLCLK) + if (mode->flags & DRM_MODE_FLAG_DBLCLK) { + if (!has_hdmi_sink) + return MODE_CLOCK_LOW; clock *= 2; + } if (drm_mode_is_420_only(&connector->display_info, mode)) clock /= 2; |