From: Egbert Eich <eich@suse.de>
Date: Wed, 24 Oct 2012 16:31:19 +0000 (+0200)
Subject: DRM/Radeon: Fix primary DAC Load Detection for RV100 chips.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9c50b1d937cc9656100ba10d9f57484c6d173936;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

DRM/Radeon: Fix primary DAC Load Detection for RV100 chips.

For Radeon 7500 ATI recommends a DAC_FORCE value of 0x1ac. This value
works better on ES1000 (RV100) chips, too, as it doesn't produce any false
positives on any cards I have tested. Therefore let's assume that this
value is good for all RV100 and RV200 chipset generations.

Signed-off-by: Egbert Eich <eich@suse.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
index f278f20ea12a..5fdc67bd25d9 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -662,6 +662,8 @@ static enum drm_connector_status radeon_legacy_primary_dac_detect(struct drm_enc
 
 	if (ASIC_IS_R300(rdev))
 		tmp |= (0x1b6 << RADEON_DAC_FORCE_DATA_SHIFT);
+	else if (ASIC_IS_RV100(rdev))
+		tmp |= (0x1ac << RADEON_DAC_FORCE_DATA_SHIFT);
 	else
 		tmp |= (0x180 << RADEON_DAC_FORCE_DATA_SHIFT);