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drm/i915/opregion: handle VBT sizes bigger than 6 KB

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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
This commit is contained in:
Jani Nikula 2015-12-15 13:18:00 +02:00
parent ffc85daba5
commit 04ebaadb9f
2 changed files with 25 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -458,6 +458,7 @@ struct intel_opregion {
u32 swsci_gbda_sub_functions;
u32 swsci_sbcb_sub_functions;
struct opregion_asle *asle;
void *rvda;
const void *vbt;
u32 vbt_size;
u32 *lid_state;

27
drivers/gpu/drm/i915/intel_opregion.c
View File

@ -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;
}
}
}