drm/edid: check for HF-VSDB block (50dd1bd1) · Commits · 戴 / test

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:

Thierry Reding <treding@nvidia.com> Signed-off-by:

Shashank Sharma <shashank.sharma@intel.com> Reviewed-by:

Jose Abreu <joabreu@synopsys.com> Signed-off-by:

Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1489404244-16608-3-git-send-email-shashank.sharma@intel.com

drivers/gpu/drm/drm_edid.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -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)

include/linux/hdmi.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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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