diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-07-19 17:44:43 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-08-02 22:15:03 +0200 |
| commit | 686169f6ecb88a765822f8289439110e7d66fa60 (patch) | |
| tree | 0df4fd79dbe4d02ae0225fa1eb80f0f8fe2fe332 /drivers/gpu/drm | |
| parent | b8aea41ad64a7f527702e0296594a52ab77dce7c (diff) | |
drm/radeon: improve dac adjust heuristics for legacy pdac
commit 03ed8cf9b28d886c64c7e705c7bb1a365fd8fb95 upstream.
Hopefully avoid more quirks in the future due to bogus
vbios dac data.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_combios.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c index f084cd777f0..beb3d97f8e3 100644 --- a/drivers/gpu/drm/radeon/radeon_combios.c +++ b/drivers/gpu/drm/radeon/radeon_combios.c @@ -953,8 +953,10 @@ struct radeon_encoder_primary_dac *radeon_combios_get_primary_dac_info(struct dac = RBIOS8(dac_info + 0x3) & 0xf; p_dac->ps2_pdac_adj = (bg << 8) | (dac); } - /* if the values are all zeros, use the table */ - if (p_dac->ps2_pdac_adj) + /* if the values are zeros, use the table */ + if ((dac == 0) || (bg == 0)) + found = 0; + else found = 1; } |