New helper function to set the preferred video mode. Can be called
after drm_add_modes_noedid if you don't want the largest supported
video mode be used by default.
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 13 +++++++++++++
include/drm/drm_crtc.h | 2 ++
2 files changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 1688ff5..a635034 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3286,6 +3286,19 @@ int drm_add_modes_noedid(struct drm_connector *connector,
}
EXPORT_SYMBOL(drm_add_modes_noedid);
+void drm_set_preferred_mode(struct drm_connector *connector,
+ int hpref, int vpref)
+{
+ struct drm_display_mode *mode;
+
+ list_for_each_entry(mode, &connector->probed_modes, head) {
+ if (drm_mode_width(mode) == hpref &&
+ drm_mode_height(mode) == vpref)
+ mode->type |= DRM_MODE_TYPE_PREFERRED;
+ }
+}
+EXPORT_SYMBOL(drm_set_preferred_mode);
+
/**
* drm_hdmi_avi_infoframe_from_display_mode() - fill an HDMI AVI infoframe with
* data from a DRM display mode
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 24f4995..ec5d737 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1108,6 +1108,8 @@ extern struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
int GTF_2C, int GTF_K, int GTF_2J);
extern int drm_add_modes_noedid(struct drm_connector *connector,
int hdisplay, int vdisplay);
+extern void drm_set_preferred_mode(struct drm_connector *connector,
+ int hpref, int vpref);
extern int drm_edid_header_is_valid(const u8 *raw_edid);
extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid);
--
1.8.3.1
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