drm/amd/display: add support for regkey "LCDFreeSyncDefault"

Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index e849b704f2f6..27d4003aa2c7 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -46,6 +46,8 @@
 
 #define FREESYNC_NO_STATIC_FOR_INTERNAL_REGKEY "DalFreeSyncNoStaticForInternal"
 
+#define FREESYNC_DEFAULT_REGKEY "LCDFreeSyncDefault"
+
 struct gradual_static_ramp {
         bool ramp_is_active;
         bool ramp_direction_is_up;
@@ -125,6 +127,8 @@ struct freesync_entity {
 struct freesync_registry_options {
         bool drr_external_supported;
         bool drr_internal_supported;
+        bool lcd_freesync_default_set;
+        int lcd_freesync_default_value;
 };
 
 struct core_freesync {
@@ -189,6 +193,16 @@ struct mod_freesync *mod_freesync_create(struct dc *dc)
                                 (data & 1) ? false : true;
         }
 
+        if (dm_read_persistent_data(dc->ctx, NULL, NULL,
+                        FREESYNC_DEFAULT_REGKEY,
+                        &data, sizeof(data), &flag)) {
+                core_freesync->opts.lcd_freesync_default_set = true;
+                core_freesync->opts.lcd_freesync_default_value = data;
+        } else {
+                core_freesync->opts.lcd_freesync_default_set = false;
+                core_freesync->opts.lcd_freesync_default_value = 0;
+        }
+
         return &core_freesync->public;
 
 fail_construct:
@@ -294,6 +308,18 @@ bool mod_freesync_add_stream(struct mod_freesync *mod_freesync,
                         core_freesync->map[core_freesync->num_entities].user_enable.
                                 enable_for_video =
                                 (persistent_freesync_enable & 4) ? true : false;
+                /* If FreeSync display and LCDFreeSyncDefault is set, use as default values write back to userenable */
+                } else if (caps->supported && (core_freesync->opts.lcd_freesync_default_set)) {
+                        core_freesync->map[core_freesync->num_entities].user_enable.enable_for_gaming =
+                                (core_freesync->opts.lcd_freesync_default_value & 1) ? true : false;
+                        core_freesync->map[core_freesync->num_entities].user_enable.enable_for_static =
+                                (core_freesync->opts.lcd_freesync_default_value & 2) ? true : false;
+                        core_freesync->map[core_freesync->num_entities].user_enable.enable_for_video =
+                                (core_freesync->opts.lcd_freesync_default_value & 4) ? true : false;
+                        dm_write_persistent_data(dc->ctx, stream->sink,
+                                                FREESYNC_REGISTRY_NAME,
+                                                "userenable", &core_freesync->opts.lcd_freesync_default_value,
+                                                sizeof(int), &flag);
                 } else {
                         core_freesync->map[core_freesync->num_entities].user_enable.
                                         enable_for_gaming = false;