[alsa-devel] [PATCH 12/15] drm/edid: Add API to help find connection type

[Subhransu S. Prusty]

To fill the audio infoframe it is required to identify the connection type
as DP or HDMI. So parse the required bits in ELD to find the connection
type.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
Cc: David Airlie <airlied at linux.ie>
Cc: dri-devel at lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter at intel.com>
---
 include/drm/drm_edid.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 2af9769..c7595a5 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -403,6 +403,16 @@ static inline int drm_eld_size(const uint8_t *eld)
 	return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
 }
 
+/**
+ * drm_eld_get_conn_type - Get device type hdmi/dp connected
+ * @eld: pointer to an eld memory structure
+ */
+static inline int drm_eld_get_conn_type(const uint8_t *eld)
+{
+	return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK) >>
+		DRM_ELD_CONN_TYPE_SHIFT;
+}
+
 struct edid *drm_do_get_edid(struct drm_connector *connector,
 	int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
 			      size_t len),
-- 
1.9.1