diff options
| author |   Jani Nikula <jani.nikula@intel.com> | 2018-02-01 13:03:43 +0200 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2018-02-02 09:50:51 +0200 |
| commit | 99b91bda84060bac061d1649fad0e3bddcf67ce6 (patch) | |
| tree | d424ac1fd941df089ecedabf6c97a6fb3eac6655 /drivers/gpu/drm/i915/intel_bios.c | |
| parent | drm/i915/dp: clean up source rate limiting for cnl (diff) | |
| download | linux-dev-99b91bda84060bac061d1649fad0e3bddcf67ce6.tar.xz linux-dev-99b91bda84060bac061d1649fad0e3bddcf67ce6.zip | |
drm/i915/dp: limit DP link rate based on VBT on CNL+
We have the max DP link rate info available in VBT since BDB version
216, included in child device config since commit c4fb60b9aba9
("drm/i915/bios: add DP max link rate to VBT child device
struct"). Parse it and use it.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a8b1364d1f2394fba3062b6ad11b474744ea4366.1517482774.git.jani.nikula@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_bios.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index cf3f8f1ba6f7..4e74aa2f16bc 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -1274,6 +1274,27 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n", port_name(port), info->hdmi_boost_level); } + + /* DP max link rate for CNL+ */ + if (bdb_version >= 216) { + switch (child->dp_max_link_rate) { + default: + case VBT_DP_MAX_LINK_RATE_HBR3: + info->dp_max_link_rate = 810000; + break; + case VBT_DP_MAX_LINK_RATE_HBR2: + info->dp_max_link_rate = 540000; + break; + case VBT_DP_MAX_LINK_RATE_HBR: + info->dp_max_link_rate = 270000; + break; + case VBT_DP_MAX_LINK_RATE_LBR: + info->dp_max_link_rate = 162000; + break; + } + DRM_DEBUG_KMS("VBT DP max link rate for port %c: %d\n", + port_name(port), info->dp_max_link_rate); + } } static void parse_ddi_ports(struct drm_i915_private *dev_priv, u8 bdb_version) |