Abstract helpers for matching vendor data blocks and extended tags, and use them to simplify all the cea_db_is_*() functions.
Take void pointer as parameter to allow transitional use for both u8 * and struct cea_db *.
Signed-off-by: Jani Nikula jani.nikula@intel.com --- drivers/gpu/drm/drm_edid.c | 113 ++++++++++++------------------------- 1 file changed, 37 insertions(+), 76 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index c12c3cbab274..a0a5a7271658 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4196,12 +4196,6 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len, return modes; }
-static int -cea_db_extended_tag(const u8 *db) -{ - return db[1]; -} - static int cea_revision(const u8 *cea) { @@ -4313,6 +4307,22 @@ static const void *cea_db_data(const struct cea_db *db) return db->data; }
+static bool cea_db_is_extended_tag(const struct cea_db *db, int tag) +{ + return (cea_db_tag(db) == CEA_DB_EXTENDED_TAG && + cea_db_payload_len(db) >= 1 && + db->data[0] == tag); +} + +static bool cea_db_is_vendor(const struct cea_db *db, int vendor_oui) +{ + const u8 *data = cea_db_data(db); + + return (cea_db_tag(db) == CEA_DB_VENDOR && + cea_db_payload_len(db) >= 3 && + oui(data[2], data[1], data[0]) == vendor_oui); +} + static void cea_db_iter_edid_begin(const struct edid *edid, struct cea_db_iter *iter) { memset(iter, 0, sizeof(*iter)); @@ -4443,79 +4453,44 @@ static void cea_db_iter_end(struct cea_db_iter *iter) memset(iter, 0, sizeof(*iter)); }
-static bool cea_db_is_hdmi_vsdb(const u8 *db) +static bool cea_db_is_hdmi_vsdb(const void *db) { - if (cea_db_tag(db) != CEA_DB_VENDOR) - return false; - - if (cea_db_payload_len(db) < 5) - return false; - - return oui(db[3], db[2], db[1]) == HDMI_IEEE_OUI; + return (cea_db_is_vendor(db, HDMI_IEEE_OUI) && + cea_db_payload_len(db) >= 5); }
-static bool cea_db_is_hdmi_forum_vsdb(const u8 *db) +static bool cea_db_is_hdmi_forum_vsdb(const void *db) { - if (cea_db_tag(db) != CEA_DB_VENDOR) - return false; - - if (cea_db_payload_len(db) < 7) - return false; - - return oui(db[3], db[2], db[1]) == HDMI_FORUM_IEEE_OUI; + return (cea_db_is_vendor(db, HDMI_FORUM_IEEE_OUI) && + cea_db_payload_len(db) >= 7); }
-static bool cea_db_is_microsoft_vsdb(const u8 *db) +static bool cea_db_is_microsoft_vsdb(const void *db) { - if (cea_db_tag(db) != CEA_DB_VENDOR) - return false; - - if (cea_db_payload_len(db) != 21) - return false; - - return oui(db[3], db[2], db[1]) == MICROSOFT_IEEE_OUI; + return (cea_db_is_vendor(db, MICROSOFT_IEEE_OUI) && + cea_db_payload_len(db) == 21); }
-static bool cea_db_is_vcdb(const u8 *db) +static bool cea_db_is_vcdb(const void *db) { - if (cea_db_tag(db) != CEA_DB_EXTENDED_TAG) - return false; - - if (cea_db_payload_len(db) != 2) - return false; - - if (cea_db_extended_tag(db) != CEA_EXT_DB_VIDEO_CAP) - return false; - - return true; + return (cea_db_is_extended_tag(db, CEA_EXT_DB_VIDEO_CAP) && + cea_db_payload_len(db) == 2); }
-static bool cea_db_is_y420cmdb(const u8 *db) +static bool cea_db_is_y420cmdb(const void *db) { - if (cea_db_tag(db) != CEA_DB_EXTENDED_TAG) - return false; - - if (!cea_db_payload_len(db)) - return false; - - if (cea_db_extended_tag(db) != CEA_EXT_DB_420_VIDEO_CAP_MAP) - return false; - - return true; + return cea_db_is_extended_tag(db, CEA_EXT_DB_420_VIDEO_CAP_MAP); }
-static bool cea_db_is_y420vdb(const u8 *db) +static bool cea_db_is_y420vdb(const void *db) { - if (cea_db_tag(db) != CEA_DB_EXTENDED_TAG) - return false; - - if (!cea_db_payload_len(db)) - return false; - - if (cea_db_extended_tag(db) != CEA_EXT_DB_420_VIDEO_DATA) - return false; + return cea_db_is_extended_tag(db, CEA_EXT_DB_420_VIDEO_DATA); +}
- return true; +static bool cea_db_is_hdmi_hdr_metadata_block(const void *db) +{ + return (cea_db_is_extended_tag(db, CEA_EXT_DB_HDR_STATIC_METADATA) && + cea_db_payload_len(db) >= 3); }
#define for_each_cea_db(cea, i, start, end) \ @@ -4651,20 +4626,6 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode) mode->clock = clock; }
-static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db) -{ - if (cea_db_tag(db) != CEA_DB_EXTENDED_TAG) - return false; - - if (db[1] != CEA_EXT_DB_HDR_STATIC_METADATA) - return false; - - if (cea_db_payload_len(db) < 3) - return false; - - return true; -} - static uint8_t eotf_supported(const u8 *edid_ext) { return edid_ext[2] &