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

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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>
This commit is contained in:
Egbert Eich 2012-10-24 18:31:19 +02:00 committed by Alex Deucher
parent 83325d0721
commit 9c50b1d937
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/radeon/radeon_legacy_encoders.c
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@ -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);