drm/amdgpu: Set FreeSync state using drm VRR properties

Support for AMDGPU specific FreeSync properties and ioctls are dropped
from amdgpu_dm in favor of supporting drm variable refresh rate
properties.

The notify_freesync and set_freesync_property functions are dropped
from amdgpu_display_funcs.

The drm vrr_capable property is now attached to any DP/HDMI connector.
Its value is updated accordingly to the connector's FreeSync capabiltiy.

The freesync_enable logic and ioctl control has has been dropped in
favor of utilizing the vrr_enabled on the drm CRTC. This allows for more
fine grained atomic control over which CRTCs should support variable
refresh rate.

To handle state changes for vrr_enabled it was easiest to drop the
forced modeset on freesync_enabled change. This patch now performs the
required stream updates when planes are flipped.

This is done for a few reasons:

(1) VRR stream updates can be done in the fast update path

(2) amdgpu_dm_atomic_check would need to be hacked apart to check
    desired variable refresh state and capability before the CRTC
    disable pass.

(3) Performing VRR stream updates on-flip is needed for enabling BTR
    support.

VRR packets and timing adjustments are now tracked and compared to
previous values sent to the hardware.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h

@@ -293,13 +293,6 @@ struct amdgpu_display_funcs {
 			      uint16_t connector_object_id,
 			      struct amdgpu_hpd *hpd,
 			      struct amdgpu_router *router);
-	/* it is used to enter or exit into free sync mode */
-	int (*notify_freesync)(struct drm_device *dev, void *data,
-			       struct drm_file *filp);
-	/* it is used to allow enablement of freesync mode */
-	int (*set_freesync_property)(struct drm_connector *connector,
-				     struct drm_property *property,
-				     uint64_t val);
 
 
 };

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h

@@ -255,7 +255,11 @@ struct dm_crtc_state {
 	int crc_skip_count;
 	bool crc_enabled;
 
-	bool freesync_enabled;
+	bool freesync_timing_changed;
+	bool freesync_vrr_info_changed;
+
+	bool vrr_supported;
+	struct mod_freesync_config freesync_config;
 	struct dc_crtc_timing_adjust adjust;
 	struct dc_info_packet vrr_infopacket;
 
@@ -280,7 +284,6 @@ struct dm_connector_state {
 	uint8_t underscan_hborder;
 	uint8_t max_bpc;
 	bool underscan_enable;
-	bool freesync_enable;
 	bool freesync_capable;
 	uint8_t abm_level;
 };