From: Clint Taylor <clinton.a.tay...@intel.com>
During VSDB decode bytes 4 and 5 contain the source physical address for
use the HDMI CEC. Make this data available as part of drm_display_info.
V2: Fix HTMLDOCS warnings for struct drm_hdmi_cec_spa
Signed-off-by: Clint Taylor <clinton.a.tay...@intel.com>
---
drivers/gpu/drm/drm_edid.c | 10 ++++++++++
include/drm/drm_connector.h | 20 ++++++++++++++++++++
2 files changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 2e55599..e64605b 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3938,6 +3938,16 @@ static void drm_parse_hdmi_deep_color_info(struct
drm_connector *connector,
struct drm_display_info *info = &connector->display_info;
u8 len = cea_db_payload_len(db);
+ if (len >= 4) {
+ info->src_phy_addr.a = (db[4] & 0xF0) >> 4;
+ info->src_phy_addr.b = db[4] & 0x0F;
+ info->src_phy_addr.c = (db[5] & 0xF0) >> 4;
+ info->src_phy_addr.d = db[5] & 0x0F;
+
+ DRM_DEBUG_KMS("HDMI SPA = %01x.%01x.%01x.%01x\n",
+ info->src_phy_addr.a, info->src_phy_addr.b,
+ info->src_phy_addr.c, info->src_phy_addr.d);
+ }
if (len >= 6)
info->dvi_dual = db[6] & 1;
if (len >= 7)
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 9c15993..0df3511 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -127,6 +127,21 @@ struct drm_scdc {
struct drm_scrambling scrambling;
};
+/**
+ * struct drm_hdmi_cec_spa
+ *
+ * Provides the Source Physical address from an HDMI VSDB EDID
+ */
+struct drm_hdmi_cec_spa {
+ /** @a: sink's Source Physical Address A field */
+ u8 a;
+ /** @b: sink's Source Physical Address B field */
+ u8 b;
+ /** @c: sink's Source Physical Address C field */
+ u8 c;
+ /** @d: sink's Source Physical Address D field */
+ u8 d;
+};
/**
* struct drm_hdmi_info - runtime information about the connected HDMI sink
@@ -263,6 +278,11 @@ struct drm_display_info {
* @hdmi: advance features of a HDMI sink.
*/
struct drm_hdmi_info hdmi;
+
+ /**
+ * @src_phy_addr: HDMI CEC Source Physical Address
+ */
+ struct drm_hdmi_cec_spa src_phy_addr;
};
int drm_display_info_set_bus_formats(struct drm_display_info *info,
--
1.9.1
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