From c2fbe663ec4f991832d67f936d3941f781884156 Mon Sep 17 00:00:00 2001 From: Felipe Clark Date: Sun, 7 Mar 2021 13:27:30 -0500 Subject: drm/amd/display: Firmware assisted MCLK switch and FS [WHY] Memory clock switching has great potential for power savings. [HOW] The driver code was modified to notify the DMCUB firmware that it should stretch the vertical blank of frames when a memory clock switch is about to start so that no blackouts happen on the screen due to unavailability of the frame buffer. The driver logic to determine when such firmware assisted strategy can be initiated is also implemented and consists on checking prerequisites of the feature. Acked-by: Alan Liu Signed-off-by: Felipe Clark Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/gpu/drm/amd/display/modules/freesync/freesync.c') diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index 03fa63d56fa6..aa121d45d9b8 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -1374,6 +1374,11 @@ unsigned long long mod_freesync_calc_field_rate_from_timing( return field_rate_in_uhz; } +bool mod_freesync_get_freesync_enabled(struct mod_vrr_params *pVrr, struct dc_stream_state *const pStream) +{ + return (pVrr->state != VRR_STATE_UNSUPPORTED) && (pVrr->state != VRR_STATE_DISABLED); +} + bool mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz, uint32_t max_refresh_cap_in_uhz, uint32_t nominal_field_rate_in_uhz) -- cgit v1.2.3