Hi Shashank,
On 06-02-2017 13:59, Shashank Sharma wrote:
From: Thierry Reding treding@nvidia.com
This patch implements a small function that finds if a given CEA db is hdmi-forum vendor specific data block or not.
Signed-off-by: Thierry Reding treding@nvidia.com Signed-off-by: Shashank Sharma shashank.sharma@intel.com
Reviewed-by: Jose Abreu joabreu@synopsys.com
Best regards, Jose Miguel Abreu
drivers/gpu/drm/drm_edid.c | 15 +++++++++++++++ include/linux/hdmi.h | 1 + 2 files changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index baa6ccb..96d3e47 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3239,6 +3239,21 @@ 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)
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h index edbb4fc..d271ff2 100644 --- a/include/linux/hdmi.h +++ b/include/linux/hdmi.h @@ -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