From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: [PATCH] drm/i915: quirk away broken OpRegion VBT Date: Sat, 24 Mar 2012 23:51:30 +0100 Message-ID: <1332629490-6219-1-git-send-email-daniel.vetter@ffwll.ch> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-we0-f177.google.com (mail-we0-f177.google.com [74.125.82.177]) by gabe.freedesktop.org (Postfix) with ESMTP id 6327E9E77F for ; Sat, 24 Mar 2012 15:50:50 -0700 (PDT) Received: by werp11 with SMTP id p11so4212895wer.36 for ; Sat, 24 Mar 2012 15:50:50 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Intel Graphics Development Cc: Daniel Vetter , stable@kernel.org List-Id: intel-gfx@lists.freedesktop.org Somehow the BIOS manages to screw things up when copying the VBT around, because the one we scrap from the VBIOS rom actually works. Cc: stable@kernel.org Tested-by: Markus Heinz Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=28812 Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_bios.c | 23 ++++++++++++++++++++++- 1 files changed, 22 insertions(+), 1 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index e4317da..d6ffdbd 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -24,6 +24,7 @@ * Eric Anholt * */ +#include #include #include "drmP.h" #include "drm.h" @@ -662,6 +663,26 @@ init_vbt_defaults(struct drm_i915_private *dev_priv) dev_priv->edp.bpp = 18; } +static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id) +{ + DRM_DEBUG_KMS("Falling back to manually reading VBT from " + "VBIOS ROM for %s\n", + id->ident); + return 1; +} + +static const struct dmi_system_id intel_no_opregion_vbt[] = { + { + .callback = intel_no_opregion_vbt_callback, + .ident = "ThinkCentre A57", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), + }, + }, + { } +}; + /** * intel_parse_bios - find VBT and initialize settings from the BIOS * @dev: DRM device @@ -682,7 +703,7 @@ intel_parse_bios(struct drm_device *dev) init_vbt_defaults(dev_priv); /* XXX Should this validation be moved to intel_opregion.c? */ - if (dev_priv->opregion.vbt) { + if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) { struct vbt_header *vbt = dev_priv->opregion.vbt; if (memcmp(vbt->signature, "$VBT", 4) == 0) { DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n", -- 1.7.9.1