On Mon, 2015-12-14 at 12:50 +0200, Jani Nikula wrote:
> 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.
>
Tested-by: Mika Kahola <mika.kahola@xxxxxxxxx>
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/intel_opregion.c | 25 +++++++++++++++++++++++--
> 2 files changed, 24 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index ca8c2a64bc6d..8cfac7398568 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -457,6 +457,7 @@ 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;
> diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
> index e89ee2383fe1..a139889dd45b 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;
> @@ -987,12 +991,29 @@ 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)) {
> opregion->vbt = vbt;
> opregion->vbt_size = vbt_size;
> + DRM_DEBUG_DRIVER("VBT from RVDA\n");
> + } else {
> + vbt = base + OPREGION_VBT_OFFSET;
> + vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
> + if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
> + opregion->vbt = vbt;
> + opregion->vbt_size = vbt_size;
> + }
> }
> }
>
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