diff options
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 46 | ||||
| -rw-r--r-- | include/drm/drm_crtc.h | 2 |
2 files changed, 48 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index f84a98f2e373..e2d5f515f7b2 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1215,3 +1215,49 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) return num_modes; } EXPORT_SYMBOL(drm_add_edid_modes); + +/** + * drm_add_modes_noedid - add modes for the connectors without EDID + * @connector: connector we're probing + * @hdisplay: the horizontal display limit + * @vdisplay: the vertical display limit + * + * Add the specified modes to the connector's mode list. Only when the + * hdisplay/vdisplay is not beyond the given limit, it will be added. + * + * Return number of modes added or 0 if we couldn't find any. + */ +int drm_add_modes_noedid(struct drm_connector *connector, + int hdisplay, int vdisplay) +{ + int i, count, num_modes = 0; + struct drm_display_mode *mode, *ptr; + struct drm_device *dev = connector->dev; + + count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); + if (hdisplay < 0) + hdisplay = 0; + if (vdisplay < 0) + vdisplay = 0; + + for (i = 0; i < count; i++) { + ptr = &drm_dmt_modes[i]; + if (hdisplay && vdisplay) { + /* + * Only when two are valid, they will be used to check + * whether the mode should be added to the mode list of + * the connector. + */ + if (ptr->hdisplay > hdisplay || + ptr->vdisplay > vdisplay) + continue; + } + mode = drm_mode_duplicate(dev, ptr); + if (mode) { + drm_mode_probed_add(connector, mode); + num_modes++; + } + } + return num_modes; +} +EXPORT_SYMBOL(drm_add_modes_noedid); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index b0427a70fcbd..ae1e9e166959 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -750,4 +750,6 @@ extern struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, extern struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, bool interlaced, int margins); +extern int drm_add_modes_noedid(struct drm_connector *connector, + int hdisplay, int vdisplay); #endif /* __DRM_CRTC_H__ */ |