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drm/edid: convert add_cea_modes() to use cea db iter

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Iterate through all CTA EDID extension blocks and DisplayID CTA data
blocks to add CEA modes.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/dfa2d79db61d5eea543bef7aca7d80da3e71f99d.1651569697.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2022-05-03 12:23:53 +03:00
parent a9ec4fd004
commit 537d9ed2f6
1 changed files with 29 additions and 34 deletions
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63
drivers/gpu/drm/drm_edid.c
View file

@ -4689,46 +4689,41 @@ static void drm_parse_y420cmdb_bitmap(struct drm_connector *connector,
static int
add_cea_modes(struct drm_connector *connector, const struct edid *edid)
{
const u8 *cea = drm_find_cea_extension(edid);
const u8 *db, *hdmi = NULL, *video = NULL;
u8 dbl, hdmi_len, video_len = 0;
const struct cea_db *db;
struct cea_db_iter iter;
int modes = 0;
if (cea && cea_revision(cea) >= 3) {
int i, start, end;
cea_db_iter_edid_begin(edid, &iter);
cea_db_iter_for_each(db, &iter) {
const u8 *hdmi = NULL, *video = NULL;
u8 hdmi_len = 0, video_len = 0;
if (cea_db_offsets(cea, &start, &end))
return 0;
if (cea_db_tag(db) == CTA_DB_VIDEO) {
video = cea_db_data(db);
video_len = cea_db_payload_len(db);
modes += do_cea_modes(connector, video, video_len);
} else if (cea_db_is_hdmi_vsdb(db)) {
/* FIXME: Switch to use cea_db_data() */
hdmi = (const u8 *)db;
hdmi_len = cea_db_payload_len(db);
} else if (cea_db_is_y420vdb(db)) {
const u8 *vdb420 = cea_db_data(db) + 1;
for_each_cea_db(cea, i, start, end) {
db = &cea[i];
dbl = cea_db_payload_len(db);
if (cea_db_tag(db) == CTA_DB_VIDEO) {
video = db + 1;
video_len = dbl;
modes += do_cea_modes(connector, video, dbl);
} else if (cea_db_is_hdmi_vsdb(db)) {
hdmi = db;
hdmi_len = dbl;
} else if (cea_db_is_y420vdb(db)) {
const u8 *vdb420 = &db[2];
/* Add 4:2:0(only) modes present in EDID */
modes += do_y420vdb_modes(connector,
vdb420,
dbl - 1);
}
/* Add 4:2:0(only) modes present in EDID */
modes += do_y420vdb_modes(connector, vdb420,
cea_db_payload_len(db) - 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);
}
cea_db_iter_end(&iter);
return modes;
}