Try to find and parse more CEA ext blocks if edid->extensions
is greater than one.
v2: split prvious patch to two. And do CEA block parsing
in this one.
v3: simplify this patch based on previous change.
v4: refine patch v3.
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Cc: Drew Davenport <ddavenport@xxxxxxxxxxxx>
Cc: intel-gfx <intel-gfx@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Lee Shawn C <shawn.c.lee@xxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 32 +++++++++++++++++++-------------
1 file changed, 19 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 78c415aa6889..9fa84881fbba 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4320,16 +4320,22 @@ static void drm_parse_y420cmdb_bitmap(struct drm_connector *connector,
static int
add_cea_modes(struct drm_connector *connector, struct edid *edid)
{
- const u8 *cea, *db, *hdmi = NULL, *video = NULL;
- u8 dbl, hdmi_len, video_len = 0;
int modes = 0, cea_ext_index = 0, displayid_ext_index = 0;
- cea = drm_find_cea_extension(edid, &cea_ext_index, &displayid_ext_index);
- if (cea && cea_revision(cea) >= 3) {
+ for (;;) {
+ const u8 *cea, *db, *hdmi = NULL, *video = NULL;
+ u8 dbl, hdmi_len = 0, video_len = 0;
int i, start, end;
+ cea = drm_find_cea_extension(edid, &cea_ext_index, &displayid_ext_index);
+ if (!cea)
+ break;
+
+ if (cea_revision(cea) < 3)
+ continue;
+
if (cea_db_offsets(cea, &start, &end))
- return 0;
+ continue;
for_each_cea_db(cea, i, start, end) {
db = &cea[i];
@@ -4351,15 +4357,15 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid)
dbl - 1);
}
}
- }
- /*
- * We parse the HDMI VSDB after having added the cea modes as we will
- * be patching their flags when the sink supports stereo 3D.
- */
- if (hdmi)
- modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len, video,
- video_len);
+ /*
+ * We parse the HDMI VSDB after having added the cea modes as we will
+ * be patching their flags when the sink supports stereo 3D.
+ */
+ if (hdmi)
+ modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len, video,
+ video_len);
+ }
return modes;
}
--
2.17.1
