On Wed, 29 Mar 2017 13:32:56 +0300
Jani Nikula <jani.nik...@intel.com> wrote:
> Seems more sensible this way, and reduces indent for the more common
> case.
>
> Signed-off-by: Jani Nikula <jani.nik...@intel.com>
Reviewed-by: Bob Paauwe <bob.j.paa...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_opregion.c | 41
> +++++++++++++++++------------------
> 1 file changed, 20 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_opregion.c
> b/drivers/gpu/drm/i915/intel_opregion.c
> index 76a39ee6d005..2b64cb6691eb 100644
> --- a/drivers/gpu/drm/i915/intel_opregion.c
> +++ b/drivers/gpu/drm/i915/intel_opregion.c
> @@ -920,8 +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 = NULL;
> - u32 vbt_size = 0;
> + const void *vbt;
> + u32 vbt_size;
>
> BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
> BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
> @@ -984,30 +984,29 @@ int intel_opregion_setup(struct drm_i915_private
> *dev_priv)
> 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;
> + }
> }
>
> + 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 (RVDA)\n");
> + DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox
> #4)\n");
> opregion->vbt = vbt;
> opregion->vbt_size = vbt_size;
> - } 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;
> - }
> }
>
> out:
--
--
Bob Paauwe
bob.j.paa...@intel.com
IOTG / PED Software Organization
Intel Corp. Folsom, CA
(916) 356-6193
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