From: Daniel Drake Date: Thu, 27 Feb 2014 15:19:30 +0000 (-0600) Subject: drm/edid: request HDMI underscan by default X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=24d01805ca652434e1ba7b83a1370cb42b618954;p=linux-beck.git drm/edid: request HDMI underscan by default Working with HDMI TVs is a real pain as they tend to overscan by default, meaning that the pixels around the edge of the framebuffer are not displayed. This is well explained here: http://mjg59.dreamwidth.org/8705.html There is a bit in the HDMI info frame that can request that the remote display shows the full pixel data ("underscan"). For the remote display, the HDMI spec states that this is optional - it doesn't have to listen. That means that most TVs will probably ignore this. But, maybe there are a handful of TVs for which this would help the situation. As we live in a digital world, ask the remote display not to overscan by default. Signed-off-by: Daniel Drake Reviewed-by: Ville Syrjälä Reviewed-by: Damien Lespiau Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index b924306b8477..f8d8a1de9573 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3599,6 +3599,7 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, frame->picture_aspect = HDMI_PICTURE_ASPECT_NONE; frame->active_aspect = HDMI_ACTIVE_ASPECT_PICTURE; + frame->scan_mode = HDMI_SCAN_MODE_UNDERSCAN; return 0; }