From: Damien Lespiau <damien.lespiau@intel.com>
Date: Tue, 6 Aug 2013 19:32:17 +0000 (+0100)
Subject: drm: Don't generate invalid AVI infoframes for CEA modes
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=03a7a189c22bf911025c695841c18a681498a102;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

drm: Don't generate invalid AVI infoframes for CEA modes

From CEA-861:

  Data Byte 1, bit A0 indicates whether Active Format Data is present in
  Data Byte 2 bits R3 through R0. A source device shall set A0=1 when
  any of the AFD bits are set.

ie. if we want to set active_aspect, we need to set the
active_info_valid bit to 1 as well.

Cc: Thierry Reding <thierry.reding@avionic-design.de>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 95d6f4b6967c..8d1139f602ec 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3107,6 +3107,7 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
 		return 0;
 
 	frame->picture_aspect = HDMI_PICTURE_ASPECT_NONE;
+	frame->active_info_valid = 1;
 	frame->active_aspect = HDMI_ACTIVE_ASPECT_PICTURE;
 
 	return 0;