diff options
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_connectors.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 8da06e17ff2..20161567dbf 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -208,6 +208,18 @@ static struct drm_display_mode *radeon_fp_native_mode(struct drm_encoder *encode drm_mode_set_name(mode); DRM_DEBUG("Adding native panel mode %s\n", mode->name); + } else if (native_mode->hdisplay != 0 && + native_mode->vdisplay != 0) { + /* mac laptops without an edid */ + /* Note that this is not necessarily the exact panel mode, + * but an approximation based on the cvt formula. For these + * systems we should ideally read the mode info out of the + * registers or add a mode table, but this works and is much + * simpler. + */ + mode = drm_cvt_mode(dev, native_mode->hdisplay, native_mode->vdisplay, 60, true, false, false); + mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER; + DRM_DEBUG("Adding cvt approximation of native panel mode %s\n", mode->name); } return mode; } |