[PATCH 3/6] drm/edid: parse source physical address

[Jani Nikula]

CEC needs the source physical address. Parsing it is trivial with the
existing EDID CEA DB infrastructure.

Default to CEC_PHYS_ADDR_INVALID (0xffff) instead of 0 to cater for
easier CEC usage.

Cc: Hans Verkuil <hverkuil-cisco at xs4all.nl>
Cc: linux-media at vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/drm_edid.c  | 5 +++++
 include/drm/drm_connector.h | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 1dbb15439468..39dd3f694544 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -29,6 +29,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/cec.h>
 #include <linux/hdmi.h>
 #include <linux/i2c.h>
 #include <linux/kernel.h>
@@ -6192,6 +6193,8 @@ drm_parse_hdmi_vsdb_video(struct drm_connector *connector, const u8 *db)
 
 	info->is_hdmi = true;
 
+	info->source_physical_address = (db[4] << 8) | db[5];
+
 	if (len >= 6)
 		info->dvi_dual = db[6] & 1;
 	if (len >= 7)
@@ -6470,6 +6473,8 @@ static void drm_reset_display_info(struct drm_connector *connector)
 	info->vics_len = 0;
 
 	info->quirks = 0;
+
+	info->source_physical_address = CEC_PHYS_ADDR_INVALID;
 }
 
 static void update_displayid_info(struct drm_connector *connector,
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index d300fde6c1a4..40a5e7acf2fa 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -816,6 +816,14 @@ struct drm_display_info {
 	 * @quirks: EDID based quirks. Internal to EDID parsing.
 	 */
 	u32 quirks;
+
+	/**
+	 * @source_physical_address: Source Physical Address from HDMI
+	 * Vendor-Specific Data Block, for CEC usage.
+	 *
+	 * Defaults to CEC_PHYS_ADDR_INVALID (0xffff).
+	 */
+	u16 source_physical_address;
 };
 
 int drm_display_info_set_bus_formats(struct drm_display_info *info,
-- 
2.39.2