[PATCH 2/7] drm/edid: Allow to ignore the audio EDID data

[Maxime Ripard]

In some cases, in order to accomodate with displays with poor EDIDs, we
need to ignore that the monitor alledgedly supports audio output and
disable the audio output.

Signed-off-by: Maxime Ripard <maxime.ripard at bootlin.com>
---
 drivers/gpu/drm/drm_edid.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 990b1909f9d7..c0258b011bb2 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4190,6 +4190,11 @@ bool drm_detect_hdmi_monitor(struct edid *edid)
 }
 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
 
+static bool ignore_edid_audio = false;
+module_param(ignore_edid_audio, bool, 0644);
+MODULE_PARM_DESC(ignore_edid_audio,
+		 "Ignore the EDID and always consider that a monitor doesn't have audio capabilities");
+
 /**
  * drm_detect_monitor_audio - check monitor audio capability
  * @edid: EDID block to scan
@@ -4209,6 +4214,9 @@ bool drm_detect_monitor_audio(struct edid *edid)
 	bool has_audio = false;
 	int start_offset, end_offset;
 
+	if (ignore_edid_audio)
+		goto end;
+
 	edid_ext = drm_find_cea_extension(edid);
 	if (!edid_ext)
 		goto end;
-- 
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