diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2015-12-15 14:18:00 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2015-12-17 12:40:57 +0300 |
| commit | 04ebaadb9f2dc66df29db6af14da2912e1e25db7 (patch) | |
| tree | 9ce5717e70cc026803b60c0c5faa934b4bcb460f /drivers/gpu/drm/i915/intel_opregion.c | |
| parent | ffc85daba535d60d28f5c8ffb3ddf78e244e1948 (diff) | |
| download | linux-04ebaadb9f2dc66df29db6af14da2912e1e25db7.tar.xz | |
drm/i915/opregion: handle VBT sizes bigger than 6 KB
The RVDA and RVDS (raw VBT data address and size) fields of the ASLE
mailbox may specify an alternate location for VBT instead of mailbox #4.
Use the alternate location if available and valid, falling back to
mailbox #4 otherwise.
v2: Update debug logging (Ville)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178280-28020-1-git-send-email-jani.nikula@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_opregion.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_opregion.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 96dbd71124a3..c15718b4862a 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -837,6 +837,10 @@ void intel_opregion_fini(struct drm_device *dev) /* just clear all opregion memory pointers now */ memunmap(opregion->header); + if (opregion->rvda) { + memunmap(opregion->rvda); + opregion->rvda = NULL; + } opregion->header = NULL; opregion->acpi = NULL; opregion->swsci = NULL; @@ -987,13 +991,30 @@ int intel_opregion_setup(struct drm_device *dev) DRM_DEBUG_DRIVER("ASLE extension supported\n"); if (!dmi_check_system(intel_no_opregion_vbt)) { - const void *vbt = base + OPREGION_VBT_OFFSET; - u32 vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET; + const void *vbt = NULL; + u32 vbt_size = 0; + + if (opregion->header->opregion_ver >= 2 && opregion->asle && + opregion->asle->rvda && opregion->asle->rvds) { + opregion->rvda = memremap(opregion->asle->rvda, + opregion->asle->rvds, + MEMREMAP_WB); + vbt = opregion->rvda; + vbt_size = opregion->asle->rvds; + } if (intel_bios_is_valid_vbt(vbt, vbt_size)) { - DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion\n"); + DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n"); opregion->vbt = vbt; opregion->vbt_size = vbt_size; + } else { + vbt = base + OPREGION_VBT_OFFSET; + vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET; + if (intel_bios_is_valid_vbt(vbt, vbt_size)) { + DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n"); + opregion->vbt = vbt; + opregion->vbt_size = vbt_size; + } } } |