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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2022-07-15 23:20:44 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2022-09-05 15:26:35 +0300 |
| commit | 4182a311fbd83f17b276d94c44539aa97d381959 (patch) | |
| tree | 071b1bf586395a02912ea5b7e5857f78bc6d7b47 /drivers/gpu/drm/i915/display/intel_bios.c | |
| parent | ac7af83ae08b2789a828add74c01ed2e7b78e21f (diff) | |
| download | linux-4182a311fbd83f17b276d94c44539aa97d381959.tar.gz linux-4182a311fbd83f17b276d94c44539aa97d381959.tar.bz2 linux-4182a311fbd83f17b276d94c44539aa97d381959.zip | |
drm/i915: Parse DP/eDP max lane count from VBT
Limit the DP lane count based on the new VBT DP/eDP max
lane count field.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220715202044.11153-13-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_bios.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_bios.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 0f618960e04f..28bdb936cd1f 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -2515,6 +2515,14 @@ static int _intel_bios_dp_max_link_rate(const struct intel_bios_encoder_data *de return parse_bdb_216_dp_max_link_rate(devdata->child.dp_max_link_rate); } +static int _intel_bios_dp_max_lane_count(const struct intel_bios_encoder_data *devdata) +{ + if (!devdata || devdata->i915->display.vbt.version < 244) + return 0; + + return devdata->child.dp_max_lane_count + 1; +} + static void sanitize_device_type(struct intel_bios_encoder_data *devdata, enum port port) { @@ -3696,6 +3704,14 @@ int intel_bios_dp_max_link_rate(struct intel_encoder *encoder) return _intel_bios_dp_max_link_rate(devdata); } +int intel_bios_dp_max_lane_count(struct intel_encoder *encoder) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port]; + + return _intel_bios_dp_max_lane_count(devdata); +} + int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder) { struct drm_i915_private *i915 = to_i915(encoder->base.dev); |