Add structure representing Adaptive Sync Secondary Data
Packet (AS SDP). Also, add Adaptive Sync SDP logging in
drm_dp_helper.c to facilitate debugging.
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx>
---
drivers/gpu/drm/display/drm_dp_helper.c | 15 +++++++++++++
include/drm/display/drm_dp.h | 1 +
include/drm/display/drm_dp_helper.h | 30 +++++++++++++++++++++++++
3 files changed, 46 insertions(+)
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index d72b6f9a352c..a205e14a6681 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -2917,6 +2917,21 @@ void drm_dp_vsc_sdp_log(const char *level, struct device *dev,
}
EXPORT_SYMBOL(drm_dp_vsc_sdp_log);
+void drm_dp_as_sdp_log(const char *level, struct device *dev,
+ const struct drm_dp_as_sdp *async)
+{
+#define DP_SDP_LOG(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
+ DP_SDP_LOG("DP SDP: %s, revision %u, length %u\n", "VSC",
+ async->revision, async->length);
+ DP_SDP_LOG(" vmin: %d vmax: %d\n", async->vmin, async->vmax);
+ DP_SDP_LOG(" target_rr: %s\n", async->target_rr);
+ DP_SDP_LOG(" duration_incr_ms: %u\n", async->duration_incr_ms);
+ DP_SDP_LOG(" duration_decr_ms: %u\n", async->duration_decr_ms);
+ DP_SDP_LOG(" operation_mode: %u\n", async->operation_mode);
+#undef DP_SDP_LOG
+}
+EXPORT_SYMBOL(drm_dp_as_sdp_log);
+
/**
* drm_dp_get_pcon_max_frl_bw() - maximum frl supported by PCON
* @dpcd: DisplayPort configuration data
diff --git a/include/drm/display/drm_dp.h b/include/drm/display/drm_dp.h
index 83d2039c018b..0575ab8ea088 100644
--- a/include/drm/display/drm_dp.h
+++ b/include/drm/display/drm_dp.h
@@ -1578,6 +1578,7 @@ enum drm_dp_phy {
#define DP_SDP_PPS 0x10 /* DP 1.4 */
#define DP_SDP_VSC_EXT_VESA 0x20 /* DP 1.4 */
#define DP_SDP_VSC_EXT_CEA 0x21 /* DP 1.4 */
+#define DP_SDP_ADAPTIVE_SYNC 0x22 /* DP 1.4 */
/* 0x80+ CEA-861 infoframe types */
#define DP_SDP_AUDIO_INFOFRAME_HB2 0x1b
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h
index 863b2e7add29..63b6bef3f21d 100644
--- a/include/drm/display/drm_dp_helper.h
+++ b/include/drm/display/drm_dp_helper.h
@@ -98,6 +98,36 @@ struct drm_dp_vsc_sdp {
enum dp_content_type content_type;
};
+/**
+ * struct drm_dp_as_sdp - drm DP Adaptive Sync SDP
+ *
+ * This structure represents a DP AS SDP of drm
+ * It is based on DP 2.1 spec [Table 2-126: Adaptive-Sync SDP Header Bytes] and
+ * [Table 2-127: Adaptive-Sync SDP Payload for DB0 through DB8]
+ *
+ * @sdp_type: secondary-data packet type
+ * @length: number of valid data bytes
+ * @vmin: minimum vtotal
+ * @vmax: maximum vtotal
+ * @duration_incr_ms: Successive frame duration increase
+ * @duration_decr_ms: Successive frame duration decrease
+ * @operation_mode: Adaptive Sync Operation Mode
+ */
+
+struct drm_dp_as_sdp {
+ unsigned char sdp_type;
+ unsigned char revision;
+ unsigned char length;
+ u16 vmin, vmax;
+ u16 target_rr;
+ u8 duration_incr_ms;
+ u8 duration_decr_ms;
+ u8 operation_mode;
+};
+
+void drm_dp_as_sdp_log(const char *level, struct device *dev,
+ const struct drm_dp_as_sdp *async);
+
void drm_dp_vsc_sdp_log(const char *level, struct device *dev,
const struct drm_dp_vsc_sdp *vsc);
--
2.25.1
