diff options
| author | Ankit Nautiyal <ankit.k.nautiyal@intel.com> | 2021-03-23 16:54:22 +0530 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2021-03-31 13:07:27 +0300 |
| commit | 04b6603d13be541df73634a18218f34a37820285 (patch) | |
| tree | b1c5d1f7de3384ba335174beb0f27544d26b73d4 /drivers/gpu | |
| parent | 68a8c645b2538c1cbecf62de916d4f92f03978fb (diff) | |
drm/i915/display: Configure HDMI2.1 Pcon for FRL only if Src-Ctl mode is available
Add the check if source control mode is supported by the
PCON, before starting configuring PCON for FRL training,
as per spec VESA DP2.0-HDMI2.1 PCON Draft-1 Sec-7.
v2: Added spec details for the change. (Uma)
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210323112422.1211-3-ankit.k.nautiyal@intel.com
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index be82377a5057..a560468765c0 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2155,8 +2155,13 @@ void intel_dp_check_frl_training(struct intel_dp *intel_dp) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); - /* Always go for FRL training if supported */ - if (!intel_dp_is_hdmi_2_1_sink(intel_dp) || + /* + * Always go for FRL training if: + * -PCON supports SRC_CTL_MODE (VESA DP2.0-HDMI2.1 PCON Spec Draft-1 Sec-7) + * -sink is HDMI2.1 + */ + if (!(intel_dp->dpcd[2] & DP_PCON_SOURCE_CTL_MODE) || + !intel_dp_is_hdmi_2_1_sink(intel_dp) || intel_dp->frl.is_trained) return; |