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Commit 618563e3 authored by Daniel Vetter's avatar Daniel Vetter
Browse files

drm/i915: Add a dual link lvds quirk for MacBook Pro 8,2 



When booting with EFI, Apple botched this one up.

v2: Switch the quirk dmesg output to DRM_INFO.
v3: Actually git add the new things ...

Tested-by: default avatarAustin Lund <austin.lund@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42842


Acked-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent bc0daf48

drivers/gpu/drm/i915/intel_display.c

+22 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
 *	Eric Anholt <eric@anholt.net>

 */



#include <linux/dmi.h>

#include <linux/cpufreq.h>

#include <linux/module.h>

#include <linux/input.h>
@@ -418,6 +419,24 @@ static void vlv_init_dpio(struct drm_device *dev) 
	POSTING_READ(DPIO_CTL);

}



static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)

{

	DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);

	return 1;

}



static const struct dmi_system_id intel_dual_link_lvds[] = {

	{

		.callback = intel_dual_link_lvds_callback,

		.ident = "Apple MacBook Pro (Core i5/i7 Series)",

		.matches = {

			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),

			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),

		},

	},

	{ }	/* terminating entry */

};



static bool is_dual_link_lvds(struct drm_i915_private *dev_priv,

			      unsigned int reg)

{
@@ -427,6 +446,9 @@ static bool is_dual_link_lvds(struct drm_i915_private *dev_priv, 
	if (i915_lvds_channel_mode > 0)

		return i915_lvds_channel_mode == 2;



	if (dmi_check_system(intel_dual_link_lvds))

		return true;



	if (dev_priv->lvds_val)

		val = dev_priv->lvds_val;

	else {