From: Ville Syrjälä ville.syrjala@linux.intel.com
Use the new helpers to extract the TMDS clock limits from the downstream facing port and check them in .mode_valid().
TODO: we should check these in .compute_config() too to eg. determine if we can do deep color on the HDMI side or not
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- .../drm/i915/display/intel_display_types.h | 1 + drivers/gpu/drm/i915/display/intel_dp.c | 36 +++++++++++++++++-- 2 files changed, 34 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 1dea017dc505..7980426e618b 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1381,6 +1381,7 @@ struct intel_dp {
/* Downstream facing port caps */ struct { + int min_tmds_clock, max_tmds_clock; int max_dotclock; u8 max_bpc; } dfp; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 6f55e15136b0..a703e4659e47 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -613,14 +613,29 @@ static bool intel_dp_hdisplay_bad(struct drm_i915_private *dev_priv,
static enum drm_mode_status intel_dp_mode_valid_downstream(struct intel_connector *connector, + const struct drm_display_mode *mode, int target_clock) { struct intel_dp *intel_dp = intel_attached_dp(connector); + const struct drm_display_info *info = &connector->base.display_info; + int tmds_clock;
if (intel_dp->dfp.max_dotclock && target_clock > intel_dp->dfp.max_dotclock) return MODE_CLOCK_HIGH;
+ /* Assume 8bpc for the DP++/HDMI/DVI TMDS clock check */ + tmds_clock = target_clock; + if (drm_mode_is_420_only(info, mode)) + tmds_clock /= 2; + + if (intel_dp->dfp.min_tmds_clock && + tmds_clock < intel_dp->dfp.min_tmds_clock) + return MODE_CLOCK_LOW; + if (intel_dp->dfp.max_tmds_clock && + tmds_clock > intel_dp->dfp.max_tmds_clock) + return MODE_CLOCK_HIGH; + return MODE_OK; }
@@ -697,7 +712,8 @@ intel_dp_mode_valid(struct drm_connector *connector, if (mode->flags & DRM_MODE_FLAG_DBLCLK) return MODE_H_ILLEGAL;
- status = intel_dp_mode_valid_downstream(intel_connector, target_clock); + status = intel_dp_mode_valid_downstream(intel_connector, + mode, target_clock); if (status != MODE_OK) return status;
@@ -6070,10 +6086,22 @@ intel_dp_set_edid(struct intel_dp *intel_dp) drm_dp_downstream_max_dotclock(intel_dp->dpcd, intel_dp->downstream_ports);
+ intel_dp->dfp.min_tmds_clock = + drm_dp_downstream_min_tmds_clock(intel_dp->dpcd, + intel_dp->downstream_ports, + edid); + intel_dp->dfp.max_tmds_clock = + drm_dp_downstream_max_tmds_clock(intel_dp->dpcd, + intel_dp->downstream_ports, + edid); + drm_dbg_kms(&i915->drm, - "[CONNECTOR:%d:%s] DFP max bpc %d, max dotclock %d\n", + "[CONNECTOR:%d:%s] DFP max bpc %d, max dotclock %d, TMDS clock %d-%d\n", connector->base.base.id, connector->base.name, - intel_dp->dfp.max_bpc, intel_dp->dfp.max_dotclock); + intel_dp->dfp.max_bpc, + intel_dp->dfp.max_dotclock, + intel_dp->dfp.min_tmds_clock, + intel_dp->dfp.max_tmds_clock);
if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) { intel_dp->has_hdmi_sink = drm_detect_hdmi_monitor(edid); @@ -6099,6 +6127,8 @@ intel_dp_unset_edid(struct intel_dp *intel_dp)
intel_dp->dfp.max_bpc = 0; intel_dp->dfp.max_dotclock = 0; + intel_dp->dfp.min_tmds_clock = 0; + intel_dp->dfp.max_tmds_clock = 0; }
static int