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Commit 49d45a31 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Dave Airlie
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drm/edid: add quirk for BPC in Samsung NP700G7A-S01PL notebook 

This bug in EDID was exposed by:

commit eccea792
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Mon Mar 26 15:12:54 2012 -0400

    drm/radeon/kms: improve bpc handling (v2)

Which resulted in kind of regression in 3.5. This fixes
https://bugs.freedesktop.org/show_bug.cgi?id=70934



Signed-off-by: default avatarRafał Miłecki <zajec5@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent f1cd6594

drivers/gpu/drm/drm_edid.c

+8 −0
Original line number Diff line number Diff line
@@ -68,6 +68,8 @@ 
#define EDID_QUIRK_DETAILED_SYNC_PP		(1 << 6)

/* Force reduced-blanking timings for detailed modes */

#define EDID_QUIRK_FORCE_REDUCED_BLANKING	(1 << 7)

/* Force 8bpc */

#define EDID_QUIRK_FORCE_8BPC			(1 << 8)



struct detailed_mode_closure {

	struct drm_connector *connector;
@@ -128,6 +130,9 @@ static struct edid_quirk { 


	/* Medion MD 30217 PG */

	{ "MED", 0x7b8, EDID_QUIRK_PREFER_LARGE_75 },



	/* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */

	{ "SEC", 0xd033, EDID_QUIRK_FORCE_8BPC },

};



/*
@@ -3435,6 +3440,9 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) 


	drm_add_display_info(edid, &connector->display_info);



	if (quirks & EDID_QUIRK_FORCE_8BPC)

		connector->display_info.bpc = 8;



	return num_modes;

}

EXPORT_SYMBOL(drm_add_edid_modes);