[Why]
This function started to get very messy and hard to follow.

[How]
Eject some functionality to separate functions and simplify greatly.

Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 119 +++++++++++-------
 1 file changed, 72 insertions(+), 47 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index a0d23853b8fc..d83c65dc93d7 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -13096,8 +13096,8 @@ static void parse_edid_displayid_vrr(struct drm_connector *connector,
 	}
 }
 
-static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
-			  const struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
+static int parse_amd_vsdb_did(struct amdgpu_dm_connector *aconnector,
+			      const struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
 	u8 *edid_ext = NULL;
 	int i;
@@ -13134,9 +13134,9 @@ static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
 	return false;
 }
 
-static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
-			       const struct edid *edid,
-			       struct amdgpu_hdmi_vsdb_info *vsdb_info)
+static int parse_amd_vsdb_cea(struct amdgpu_dm_connector *aconnector,
+			      const struct edid *edid,
+			      struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
 	u8 *edid_ext = NULL;
 	int i;
@@ -13166,6 +13166,44 @@ static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
 	return valid_vsdb_found ? i : -ENODEV;
 }
 
+static bool is_monitor_range_invalid(struct drm_connector *conn)
+{
+	return conn->display_info.monitor_range.min_vfreq == 0 ||
+	       conn->display_info.monitor_range.max_vfreq == 0;
+}
+
+/**
+ * Returns true if (max_vfreq - min_vfreq) > 10
+ */
+static bool is_freesync_capable(struct drm_monitor_range_info *range)
+{
+	return (range->max_vfreq - range->min_vfreq) > 10;
+}
+
+static void monitor_range_from_vsdb(struct drm_connector *conn,
+				    struct amdgpu_hdmi_vsdb_info *vsdb)
+{
+	struct drm_monitor_range_info *range = &conn->display_info.monitor_range;
+
+	range->min_vfreq = vsdb->min_refresh_rate_hz;
+	range->max_vfreq = vsdb->max_refresh_rate_hz;
+}
+
+/**
+ * Returns true if connector is capable of freesync
+ * Optionally, can fetch the range from AMD vsdb
+ */
+static bool copy_range_to_amdgpu_connector(struct drm_connector *conn)
+{
+	struct amdgpu_dm_connector *aconn = to_amdgpu_dm_connector(conn);
+	struct drm_monitor_range_info *range = &conn->display_info.monitor_range;
+
+	aconn->min_vfreq = range->min_vfreq;
+	aconn->max_vfreq = range->max_vfreq;
+
+	return is_freesync_capable(range);
+}
+
 /**
  * amdgpu_dm_update_freesync_caps - Update Freesync capabilities
  *
@@ -13180,15 +13218,18 @@ static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
 void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 				    const struct drm_edid *drm_edid)
 {
-	int i = 0;
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 			to_amdgpu_dm_connector(connector);
 	struct dm_connector_state *dm_con_state = NULL;
 	struct dc_sink *sink;
 	struct amdgpu_device *adev = drm_to_adev(connector->dev);
 	struct amdgpu_hdmi_vsdb_info vsdb_info = {0};
+	struct amdgpu_hdmi_vsdb_info vsdb_did = {0};
+	struct dpcd_caps dpcd_caps = {0};
 	const struct edid *edid;
 	bool freesync_capable = false;
+	bool valid_vsdb_cea = false;
+	bool vsdb_freesync = false;
 	enum adaptive_sync_type as_type = ADAPTIVE_SYNC_TYPE_NONE;
 
 	if (!connector->state) {
@@ -13218,62 +13259,46 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 		goto update;
 
 	edid = drm_edid_raw(drm_edid); // FIXME: Get rid of drm_edid_raw()
+	valid_vsdb_cea = parse_amd_vsdb_cea(amdgpu_dm_connector, edid, &vsdb_info) >= 0;
+	vsdb_freesync = valid_vsdb_cea && vsdb_info.freesync_supported;
+	if (amdgpu_dm_connector->dc_link)
+		dpcd_caps = amdgpu_dm_connector->dc_link->dpcd_caps;
 
 	/* Some eDP panels only have the refresh rate range info in DisplayID */
-	if ((connector->display_info.monitor_range.min_vfreq == 0 ||
-	     connector->display_info.monitor_range.max_vfreq == 0))
+	if (is_monitor_range_invalid(connector))
 		parse_edid_displayid_vrr(connector, edid);
 
-	if (edid && (sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT ||
-		     sink->sink_signal == SIGNAL_TYPE_EDP)) {
-		if (amdgpu_dm_connector->dc_link &&
-		    amdgpu_dm_connector->dc_link->dpcd_caps.allow_invalid_MSA_timing_param) {
-			amdgpu_dm_connector->min_vfreq = connector->display_info.monitor_range.min_vfreq;
-			amdgpu_dm_connector->max_vfreq = connector->display_info.monitor_range.max_vfreq;
-			if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
-				freesync_capable = true;
-		}
+	if (sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT ||
+	    sink->sink_signal == SIGNAL_TYPE_EDP) {
 
-		parse_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
+		if (dpcd_caps.allow_invalid_MSA_timing_param)
+			freesync_capable = copy_range_to_amdgpu_connector(connector);
 
-		if (vsdb_info.replay_mode) {
-			amdgpu_dm_connector->vsdb_info.replay_mode = vsdb_info.replay_mode;
-			amdgpu_dm_connector->vsdb_info.amd_vsdb_version = vsdb_info.amd_vsdb_version;
+		/* eDP */
+		if (edid)
+			parse_amd_vsdb_did(amdgpu_dm_connector, edid, &vsdb_did);
+
+		if (vsdb_did.replay_mode) {
+			amdgpu_dm_connector->vsdb_info.replay_mode = vsdb_did.replay_mode;
+			amdgpu_dm_connector->vsdb_info.amd_vsdb_version = vsdb_did.amd_vsdb_version;
 			amdgpu_dm_connector->as_type = ADAPTIVE_SYNC_TYPE_EDP;
 		}
 
-	} else if (drm_edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
-		i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
-		if (i >= 0 && vsdb_info.freesync_supported) {
-			amdgpu_dm_connector->min_vfreq = vsdb_info.min_refresh_rate_hz;
-			amdgpu_dm_connector->max_vfreq = vsdb_info.max_refresh_rate_hz;
-			if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
-				freesync_capable = true;
-
-			connector->display_info.monitor_range.min_vfreq = vsdb_info.min_refresh_rate_hz;
-			connector->display_info.monitor_range.max_vfreq = vsdb_info.max_refresh_rate_hz;
-		}
+	} else if (sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A && vsdb_freesync) {
+		monitor_range_from_vsdb(connector, &vsdb_info);
+		freesync_capable = copy_range_to_amdgpu_connector(connector);
 	}
 
 	if (amdgpu_dm_connector->dc_link)
 		as_type = dm_get_adaptive_sync_support_type(amdgpu_dm_connector->dc_link);
 
-	if (as_type == FREESYNC_TYPE_PCON_IN_WHITELIST) {
-		i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
-		if (i >= 0 && vsdb_info.freesync_supported && vsdb_info.amd_vsdb_version > 0) {
+	if (as_type == FREESYNC_TYPE_PCON_IN_WHITELIST && vsdb_freesync) {
+		amdgpu_dm_connector->pack_sdp_v1_3 = true;
+		amdgpu_dm_connector->as_type = as_type;
+		amdgpu_dm_connector->vsdb_info = vsdb_info;
 
-			amdgpu_dm_connector->pack_sdp_v1_3 = true;
-			amdgpu_dm_connector->as_type = as_type;
-			amdgpu_dm_connector->vsdb_info = vsdb_info;
-
-			amdgpu_dm_connector->min_vfreq = vsdb_info.min_refresh_rate_hz;
-			amdgpu_dm_connector->max_vfreq = vsdb_info.max_refresh_rate_hz;
-			if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
-				freesync_capable = true;
-
-			connector->display_info.monitor_range.min_vfreq = vsdb_info.min_refresh_rate_hz;
-			connector->display_info.monitor_range.max_vfreq = vsdb_info.max_refresh_rate_hz;
-		}
+		monitor_range_from_vsdb(connector, &vsdb_info);
+		freesync_capable = copy_range_to_amdgpu_connector(connector);
 	}
 
 update:
-- 
2.52.0

Hi Tomasz,

kernel test robot noticed the following build warnings:

[auto build test WARNING on next-20260116]
[also build test WARNING on linus/master v6.19-rc6]
[cannot apply to drm-misc/drm-misc-next v6.19-rc5 v6.19-rc4 v6.19-rc3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Tomasz-Paku-a/drm-amd-display-Return-if-DisplayID-not-found-in-parse_amd_vsdb/20260119-091453
base:   next-20260116
patch link:    https://lore.kernel.org/r/20260119011146.62302-3-tomasz.pakula.oficjalny%40gmail.com
patch subject: [PATCH 02/17] drm/amd/display: Refactor amdgpu_dm_update_freesync_caps()
config: i386-buildonly-randconfig-001-20260119 (https://download.01.org/0day-ci/archive/20260119/202601191507.cZ9ZcocL-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260119/202601191507.cZ9ZcocL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601191507.cZ9ZcocL-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> Warning: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:13200 This comment starts with '/**', but isn't a kernel-doc comment. Refer to Documentation/doc-guide/kernel-doc.rst
    * Returns true if (max_vfreq - min_vfreq) > 10
   Warning: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:13217 This comment starts with '/**', but isn't a kernel-doc comment. Refer to Documentation/doc-guide/kernel-doc.rst
    * Returns true if connector is capable of freesync

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for NET_SELFTESTS
   Depends on [n]: NET [=y] && PHYLIB [=y] && INET [=n]
   Selected by [m]:
   - AMD_XGBE [=m] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_AMD [=y] && (OF_ADDRESS [=y] || ACPI [=y] || PCI [=y]) && HAS_IOMEM [=y] && (X86 [=y] || ARM64 || COMPILE_TEST [=y]) && PTP_1588_CLOCK_OPTIONAL [=m]

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki