Commit 50dd1bd1 authored by Thierry Reding's avatar Thierry Reding Committed by Jani Nikula

drm/edid: check for HF-VSDB block

This patch implements a small function that finds if a
given CEA db is hdmi-forum vendor specific data block
or not.

V2: Rebase.
V3: Added R-B from Jose.
V4: Rebase
V5: Rebase
V6: Rebase
V7: Rebase
V8: Rebase
V9: Rebase
V10: Rebase
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarShashank Sharma <shashank.sharma@intel.com>
Reviewed-by: default avatarJose Abreu <joabreu@synopsys.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1489404244-16608-3-git-send-email-shashank.sharma@intel.com
parent 3ad33ae2
......@@ -3248,6 +3248,21 @@ static bool cea_db_is_hdmi_vsdb(const u8 *db)
return hdmi_id == HDMI_IEEE_OUI;
}
static bool cea_db_is_hdmi_forum_vsdb(const u8 *db)
{
unsigned int oui;
if (cea_db_tag(db) != VENDOR_BLOCK)
return false;
if (cea_db_payload_len(db) < 7)
return false;
oui = db[3] << 16 | db[2] << 8 | db[1];
return oui == HDMI_FORUM_IEEE_OUI;
}
#define for_each_cea_db(cea, i, start, end) \
for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1)
......
......@@ -35,6 +35,7 @@ enum hdmi_infoframe_type {
};
#define HDMI_IEEE_OUI 0x000c03
#define HDMI_FORUM_IEEE_OUI 0xc45dd8
#define HDMI_INFOFRAME_HEADER_SIZE 4
#define HDMI_AVI_INFOFRAME_SIZE 13
#define HDMI_SPD_INFOFRAME_SIZE 25
......
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