From 04ebaadb9f2dc66df29db6af14da2912e1e25db7 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Tue, 15 Dec 2015 13:18:00 +0200 Subject: [PATCH] drm/i915/opregion: handle VBT sizes bigger than 6 KB MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Tested-by: Mika Kahola Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1450178280-28020-1-git-send-email-jani.nikula@intel.com --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_opregion.c | 27 ++++++++++++++++++++++++--- 2 files changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 18be127f5678..b9739d10e9b4 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -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; diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 96dbd71124a3..c15718b4862a 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; @@ -987,13 +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; + } } } -- GitLab