diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_opregion.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_opregion.c | 63 |
1 files changed, 33 insertions, 30 deletions
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 441c01466384..d44465190dc1 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -920,6 +920,8 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv) char buf[sizeof(OPREGION_SIGNATURE)]; int err = 0; void *base; + const void *vbt; + u32 vbt_size; BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); @@ -972,45 +974,46 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv) if (mboxes & MBOX_ASLE_EXT) DRM_DEBUG_DRIVER("ASLE extension supported\n"); - if (!dmi_check_system(intel_no_opregion_vbt)) { - 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 (dmi_check_system(intel_no_opregion_vbt)) + goto out; + 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 (RVDA)\n"); opregion->vbt = vbt; opregion->vbt_size = vbt_size; + goto out; } else { - vbt = base + OPREGION_VBT_OFFSET; - /* - * The VBT specification says that if the ASLE ext - * mailbox is not used its area is reserved, but - * on some CHT boards the VBT extends into the - * ASLE ext area. Allow this even though it is - * against the spec, so we do not end up rejecting - * the VBT on those boards (and end up not finding the - * LCD panel because of this). - */ - vbt_size = (mboxes & MBOX_ASLE_EXT) ? - OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; - vbt_size -= 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; - } + DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n"); } } + vbt = base + OPREGION_VBT_OFFSET; + /* + * The VBT specification says that if the ASLE ext mailbox is not used + * its area is reserved, but on some CHT boards the VBT extends into the + * ASLE ext area. Allow this even though it is against the spec, so we + * do not end up rejecting the VBT on those boards (and end up not + * finding the LCD panel because of this). + */ + vbt_size = (mboxes & MBOX_ASLE_EXT) ? + OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; + vbt_size -= 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; + } else { + DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n"); + } + +out: return 0; err_out: |