linux-kernel - [PATCH 5.5 069/399] drm/amd/display: Clear state after exiting fixed active VRR state

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Date:   Fri, 21 Feb 2020 08:36:34 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Amanda Liu <amanda.liu@....com>,
        Anthony Koo <Anthony.Koo@....com>,
        Harry Wentland <harry.wentland@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.5 069/399] drm/amd/display: Clear state after exiting fixed active VRR state

From: Amanda Liu <amanda.liu@....com>

[ Upstream commit 6f8f76444baf405bacb0591d97549a71a9aaa1ac ]

[why]
Upon exiting a fixed active VRR state, the state isn't cleared. This
leads to the variable VRR range to be calculated incorrectly.

[how]
Set fixed active state to false when updating vrr params

Signed-off-by: Amanda Liu <amanda.liu@....com>
Reviewed-by: Anthony Koo <Anthony.Koo@....com>
Acked-by: Harry Wentland <harry.wentland@....com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 5437b50e9f90d..d9ea4ae690af6 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -807,6 +807,7 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
 			2 * in_out_vrr->min_refresh_in_uhz)
 		in_out_vrr->btr.btr_enabled = false;
 
+	in_out_vrr->fixed.fixed_active = false;
 	in_out_vrr->btr.btr_active = false;
 	in_out_vrr->btr.inserted_duration_in_us = 0;
 	in_out_vrr->btr.frames_to_insert = 0;
@@ -826,6 +827,7 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
 		in_out_vrr->adjust.v_total_max = stream->timing.v_total;
 	} else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
 			refresh_range >= MIN_REFRESH_RANGE_IN_US) {
+
 		in_out_vrr->adjust.v_total_min =
 			calc_v_total_from_refresh(stream,
 				in_out_vrr->max_refresh_in_uhz);
-- 
2.20.1