[RFC PATCH v2 6/6] drm/amd/display: remove redundant freesync parser for DP

[Melissa Wen]

When updating connector under drm_edid infrastructure, many calculations
and validations are already done and become redundant inside AMD driver.
Remove those driver-specific code in favor of the DRM common code.

Signed-off-by: Melissa Wen <mwen at igalia.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 86 +------------------
 1 file changed, 4 insertions(+), 82 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 b3c396d626e9..7e0f93de27e6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10994,24 +10994,6 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 	return ret;
 }
 
-static bool is_dp_capable_without_timing_msa(struct dc *dc,
-					     struct amdgpu_dm_connector *amdgpu_dm_connector)
-{
-	u8 dpcd_data;
-	bool capable = false;
-
-	if (amdgpu_dm_connector->dc_link &&
-		dm_helpers_dp_read_dpcd(
-				NULL,
-				amdgpu_dm_connector->dc_link,
-				DP_DOWN_STREAM_PORT_COUNT,
-				&dpcd_data,
-				sizeof(dpcd_data))) {
-		capable = (dpcd_data & DP_MSA_TIMING_PAR_IGNORED) ? true:false;
-	}
-
-	return capable;
-}
 
 static bool dm_edid_parser_send_cea(struct amdgpu_display_manager *dm,
 		unsigned int offset,
@@ -11225,9 +11207,6 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 				    const struct drm_edid *drm_edid)
 {
 	int i = 0;
-	const struct detailed_timing *timing;
-	const struct detailed_non_pixel *data;
-	const struct detailed_data_monitor_range *range;
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 			to_amdgpu_dm_connector(connector);
 	struct dm_connector_state *dm_con_state = NULL;
@@ -11254,8 +11233,6 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 
 		amdgpu_dm_connector->min_vfreq = 0;
 		amdgpu_dm_connector->max_vfreq = 0;
-		connector->display_info.monitor_range.min_vfreq = 0;
-		connector->display_info.monitor_range.max_vfreq = 0;
 		freesync_capable = false;
 
 		goto update;
@@ -11269,65 +11246,11 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 	edid = drm_edid_raw(drm_edid); // FIXME: Get rid of drm_edid_raw()
 	if (edid && (sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT ||
 		     sink->sink_signal == SIGNAL_TYPE_EDP)) {
-		bool edid_check_required = false;
+		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 (is_dp_capable_without_timing_msa(adev->dm.dc,
-						     amdgpu_dm_connector)) {
-			if (edid->features & DRM_EDID_FEATURE_CONTINUOUS_FREQ) {
-				freesync_capable = true;
-				amdgpu_dm_connector->min_vfreq = connector->display_info.monitor_range.min_vfreq;
-				amdgpu_dm_connector->max_vfreq = connector->display_info.monitor_range.max_vfreq;
-			} else {
-				edid_check_required = edid->version > 1 ||
-						      (edid->version == 1 &&
-						       edid->revision > 1);
-			}
-		}
-
-		if (edid_check_required) {
-			for (i = 0; i < 4; i++) {
-
-				timing	= &edid->detailed_timings[i];
-				data	= &timing->data.other_data;
-				range	= &data->data.range;
-				/*
-				 * Check if monitor has continuous frequency mode
-				 */
-				if (data->type != EDID_DETAIL_MONITOR_RANGE)
-					continue;
-				/*
-				 * Check for flag range limits only. If flag == 1 then
-				 * no additional timing information provided.
-				 * Default GTF, GTF Secondary curve and CVT are not
-				 * supported
-				 */
-				if (range->flags != 1)
-					continue;
-
-				connector->display_info.monitor_range.min_vfreq = range->min_vfreq;
-				connector->display_info.monitor_range.max_vfreq = range->max_vfreq;
-
-				if (edid->revision >= 4) {
-					if (data->pad2 & DRM_EDID_RANGE_OFFSET_MIN_VFREQ)
-						connector->display_info.monitor_range.min_vfreq += 255;
-					if (data->pad2 & DRM_EDID_RANGE_OFFSET_MAX_VFREQ)
-						connector->display_info.monitor_range.max_vfreq += 255;
-				}
-
-				amdgpu_dm_connector->min_vfreq =
-					connector->display_info.monitor_range.min_vfreq;
-				amdgpu_dm_connector->max_vfreq =
-					connector->display_info.monitor_range.max_vfreq;
-
-				break;
-			}
-
-			if (amdgpu_dm_connector->max_vfreq -
-			    amdgpu_dm_connector->min_vfreq > 10) {
-
-				freesync_capable = true;
-			}
-		}
 		parse_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
 
 		if (vsdb_info.replay_mode) {
@@ -11335,7 +11258,6 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 			amdgpu_dm_connector->vsdb_info.amd_vsdb_version = vsdb_info.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) {
-- 
2.43.0