Add helper to allow users to retrieve the speaker allocations without
knowledge of the ELD structure.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Reviewed-by: Jani Nikula <jani.nikula at intel.com>
---
include/drm/drm_edid.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index c3a7d44..de93543 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -248,6 +248,7 @@ struct detailed_timing {
# define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */
#define DRM_ELD_SPEAKER 7
+# define DRM_ELD_SPEAKER_MASK 0x7f
# define DRM_ELD_SPEAKER_RLRC (1 << 6)
# define DRM_ELD_SPEAKER_FLRC (1 << 5)
# define DRM_ELD_SPEAKER_RC (1 << 4)
@@ -415,6 +416,18 @@ static inline int drm_eld_size(const uint8_t *eld)
}
/**
+ * drm_eld_get_spk_alloc - Get speaker allocation
+ * @eld: pointer to an ELD memory structure
+ *
+ * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
+ * field definitions to identify speakers.
+ */
+static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
+{
+ return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
+}
+
+/**
* drm_eld_get_conn_type - Get device type hdmi/dp connected
* @eld: pointer to an ELD memory structure
*
--
1.9.1
