Add 2 new EDID quirk flags:
- EDID_QUIRK_DISABLE_INFOFRAMES turns off all HDMI-specific
functionality (audio, HDCP, etc.). Intended for displays that
are confused by *any* InfoFrames.
- EDID_QUIRK_NO_AUDIO disables HDMI audio. Intended for displays
that incorrectely report audio capabilities in their EDID data.
Signed-off-by: Ian Pilcher <arequip...@gmail.com>
Acked-by: Paul Menzel <paulepan...@users.sourceforge.net>
---
drivers/gpu/drm/drm_edid.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index ea535f6..61586b4 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -70,6 +70,10 @@
#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
/* Force reduced-blanking timings for detailed modes */
#define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7)
+/* Display is confused by InfoFrames; don't sent any */
+#define EDID_QUIRK_DISABLE_INFOFRAMES (1 << 8)
+/* Display doesn't have any audio output */
+#define EDID_QUIRK_NO_AUDIO (1 << 9)
struct detailed_mode_closure {
struct drm_connector *connector;
@@ -2109,6 +2113,14 @@ bool drm_detect_hdmi_monitor(struct edid *edid)
int i, hdmi_id;
int start_offset, end_offset;
bool is_hdmi = false;
+ char buf[EDID_DISPLAY_ID_BUF_SIZE];
+
+ if (edid_get_quirks(edid) & EDID_QUIRK_DISABLE_INFOFRAMES) {
+ DRM_INFO("Disabling HDMI InfoFrames on display %s "
+ "due to EDID quirk\n",
+ drm_edid_display_id_format(edid->display_id, buf, 1));
+ goto end;
+ }
edid_ext = drm_find_cea_extension(edid);
if (!edid_ext)
@@ -2157,6 +2169,14 @@ bool drm_detect_monitor_audio(struct edid *edid)
int i, j;
bool has_audio = false;
int start_offset, end_offset;
+ char buf[EDID_DISPLAY_ID_BUF_SIZE];
+
+ if (edid_get_quirks(edid) & EDID_QUIRK_NO_AUDIO) {
+ DRM_INFO("Disabling HDMI audio on display %s "
+ "due to EDID quirk\n",
+ drm_edid_display_id_format(edid->display_id, buf, 1));
+ goto end;
+ }
edid_ext = drm_find_cea_extension(edid);
if (!edid_ext)
--
1.7.11.2
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