diff options
| author |   Jani Nikula <jani.nikula@intel.com> | 2017-03-10 15:27:58 +0200 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2017-03-14 10:49:13 +0200 |
| commit | bb1d132935c2f87cd261eb559759fe49d5e5dc43 (patch) | |
| tree | f39729cb724a7872eead3550a0f401fea05a8f0e /drivers/gpu/drm/i915/intel_bios.c | |
| parent | drm/i915: Optimize VLV/CHV display FIFO updates (diff) | |
| download | linux-dev-bb1d132935c2f87cd261eb559759fe49d5e5dc43.tar.xz linux-dev-bb1d132935c2f87cd261eb559759fe49d5e5dc43.zip | |
drm/i915/vbt: split out defaults that are set when there is no VBT
The main thing are the DDI ports. If there's a VBT that says there are
no outputs, we should trust that, and not have semi-random
defaults. Unfortunately, the defaults have resulted in some Chromebooks
without VBT to rely on this behaviour, so we split out the defaults for
the missing VBT case.
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/95c26079ff640d43f53b944f17e9fc356b36daec.1489152288.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 | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 710988d72253..639d45c1dd2e 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -1341,6 +1341,7 @@ parse_device_mapping(struct drm_i915_private *dev_priv, return; } +/* Common defaults which may be overridden by VBT. */ static void init_vbt_defaults(struct drm_i915_private *dev_priv) { @@ -1377,6 +1378,18 @@ init_vbt_defaults(struct drm_i915_private *dev_priv) &dev_priv->vbt.ddi_port_info[port]; info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN; + } +} + +/* Defaults to initialize only if there is no VBT. */ +static void +init_vbt_missing_defaults(struct drm_i915_private *dev_priv) +{ + enum port port; + + for (port = PORT_A; port < I915_MAX_PORTS; port++) { + struct ddi_vbt_port_info *info = + &dev_priv->vbt.ddi_port_info[port]; info->supports_dvi = (port != PORT_A && port != PORT_E); info->supports_hdmi = info->supports_dvi; @@ -1516,8 +1529,10 @@ void intel_bios_init(struct drm_i915_private *dev_priv) parse_ddi_ports(dev_priv, bdb); out: - if (!vbt) + if (!vbt) { DRM_INFO("Failed to find VBIOS tables (VBT)\n"); + init_vbt_missing_defaults(dev_priv); + } if (bios) pci_unmap_rom(pdev, bios); |