diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-05-29 14:02:04 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-06-06 16:18:15 +0300 |
| commit | 3bde449f0bf10e2660ad2858a0334f0eccf21a1c (patch) | |
| tree | a507f18e21c685d6e92549e1b9408226f4ef19d7 /drivers/gpu/drm/drm_edid.c | |
| parent | 382d2af64e7d7083eefcc8c7e6c780634174ce87 (diff) | |
drm/edid: Ignore "DFP 1.x" bit for EDID 1.2 and earlier
From VESA EDID implementation guide v1.0:
"For EDID version 1 revision 2 or earlier data structures when offset 14h
bit 7 is set to one, the value of bits 6-0 are undefined, and therefore
cannot be interpreted to mean anything."
And since EDID 1.4 redefines that bit let's consult it only for
EDID 1.3.
Cc: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190529110204.2384-2-ville.syrjala@linux.intel.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index dd601ed6a30e..c3296a72fff9 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4569,8 +4569,8 @@ u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edi * tells us to assume 8 bpc color depth if the EDID doesn't have * extensions which tell otherwise. */ - if ((info->bpc == 0) && (edid->revision < 4) && - (edid->input & DRM_EDID_DIGITAL_DFP_1_X)) { + if (info->bpc == 0 && edid->revision == 3 && + edid->input & DRM_EDID_DIGITAL_DFP_1_X) { info->bpc = 8; DRM_DEBUG("%s: Assigning DFP sink color depth as %d bpc.\n", connector->name, info->bpc); |