From: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Date: Tue, 28 Apr 2026 07:44:55 +0000 (+0530)
Subject: drm/dp: Add a helper to get the SDP type as a string
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=899f7991ea409e57aaa4c4c0a76810a32da3f051;p=thirdparty%2Fkernel%2Flinux.git

drm/dp: Add a helper to get the SDP type as a string

Introduce dp_sdp_type_get_name() to get the SDP type as a string.
Use this to log the SDP type based on the sdp_type fields of the
VSC and AS SDPs instead of the hardcoded strings.

v2: Modify the SDP names to match the DisplayPort Spec. (Ville)

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260428074457.3566918-8-ankit.k.nautiyal@intel.com
---

diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index ccb77b0744d8..c2221aa40643 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -3487,10 +3487,38 @@ static const char *dp_content_type_get_name(enum dp_content_type content_type)
 	}
 }
 
+static const char *dp_sdp_type_get_name(unsigned char type)
+{
+	switch (type) {
+	case DP_SDP_AUDIO_TIMESTAMP:
+		return "Audio_TimeStamp";
+	case DP_SDP_AUDIO_STREAM:
+		return "Audio_Stream";
+	case DP_SDP_EXTENSION:
+		return "Extension";
+	case DP_SDP_AUDIO_COPYMANAGEMENT:
+		return "Audio_CopyManagement";
+	case DP_SDP_ISRC:
+		return "ISRC";
+	case DP_SDP_VSC:
+		return "VSC";
+	case DP_SDP_PPS:
+		return "PPS";
+	case DP_SDP_VSC_EXT_VESA:
+		return "VSC_EXT_VESA";
+	case DP_SDP_VSC_EXT_CEA:
+		return "VSC_EXT_CEA";
+	case DP_SDP_ADAPTIVE_SYNC:
+		return "Adaptive-Sync";
+	default:
+		return "Unknown";
+	}
+}
+
 void drm_dp_vsc_sdp_log(struct drm_printer *p, const struct drm_dp_vsc_sdp *vsc)
 {
-	drm_printf(p, "DP SDP: VSC, revision %u, length %u\n",
-		   vsc->revision, vsc->length);
+	drm_printf(p, "DP SDP: %s, revision %u, length %u\n",
+		   dp_sdp_type_get_name(vsc->sdp_type), vsc->revision, vsc->length);
 	drm_printf(p, "    pixelformat: %s\n",
 		   dp_pixelformat_get_name(vsc->pixelformat));
 	drm_printf(p, "    colorimetry: %s\n",
@@ -3505,8 +3533,8 @@ EXPORT_SYMBOL(drm_dp_vsc_sdp_log);
 
 void drm_dp_as_sdp_log(struct drm_printer *p, const struct drm_dp_as_sdp *as_sdp)
 {
-	drm_printf(p, "DP SDP: AS_SDP, revision %u, length %u\n",
-		   as_sdp->revision, as_sdp->length);
+	drm_printf(p, "DP SDP: %s, revision %u, length %u\n",
+		   dp_sdp_type_get_name(as_sdp->sdp_type), as_sdp->revision, as_sdp->length);
 	drm_printf(p, "    vtotal: %d\n", as_sdp->vtotal);
 	drm_printf(p, "    target rr: %d\n", as_sdp->target_rr);
 	drm_printf(p, "    duration increase ms: %d\n", as_sdp->duration_incr_ms);