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drm/i915/opregion: fix version check 

The u32 version field encodes major, minor, revision and reserved. We've
basically been checking for any non-zero version.

Add opregion version logging while at it.

v2: Fix the fix of the version check

Fixes: 04ebaadb9f ("drm/i915/opregion: handle VBT sizes bigger than 6 KB")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190208184254.24123-1-jani.nikula@intel.com
(cherry picked from commit 98fdaaca95)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula 2019-02-08 20:42:52 +02:00
parent 2e7bd10e05
commit fc89a38d99
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gpu/drm/i915/intel_opregion.c
View File

@ -55,7 +55,12 @@
struct opregion_header {
u8 signature[16];
u32 size;
u32 opregion_ver;
struct {
u8 rsvd;
u8 revision;
u8 minor;
u8 major;
} __packed over;
u8 bios_ver[32];
u8 vbios_ver[16];
u8 driver_ver[16];
@ -925,6 +930,11 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
opregion->header = base;
opregion->lid_state = base + ACPI_CLID;
DRM_DEBUG_DRIVER("ACPI OpRegion version %u.%u.%u\n",
opregion->header->over.major,
opregion->header->over.minor,
opregion->header->over.revision);
mboxes = opregion->header->mboxes;
if (mboxes & MBOX_ACPI) {
DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
@ -953,7 +963,7 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
if (dmi_check_system(intel_no_opregion_vbt))
goto out;
if (opregion->header->opregion_ver >= 2 && opregion->asle &&
if (opregion->header->over.major >= 2 && opregion->asle &&
opregion->asle->rvda && opregion->asle->rvds) {
opregion->rvda = memremap(opregion->asle->rvda,
opregion->asle->rvds,