From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
I don't understand what the DispID CEA data block revision
means. The spec doesn't say. I guess some DispID must have
a value of >= 3 in there or else we generally wouldn't
even parse the CEA data blocks. Or does all this code
actually not do anything?
Cc: Andres Rodriguez <andresx7@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 0369a54e3d32..fd9b724067a7 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3977,6 +3977,13 @@ cea_db_tag(const u8 *db)
static int
cea_revision(const u8 *cea)
{
+ /*
+ * FIXME is this correct for the DispID variant?
+ * The DispID spec doesn't really specify whether
+ * this is the revision of the CEA extension or
+ * the DispID CEA data block. And the only value
+ * given as an example is 0.
+ */
return cea[1];
}
--
2.24.1
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