[PATCH AUTOSEL 5.10 068/137] drm/amd/display: Update scaling settings on modeset

Sasha Levin sashal at kernel.org
Tue Jul 6 11:20:54 UTC 2021

From: Roman Li <roman.li at amd.com>

[ Upstream commit c521fc316d12fb9ea7b7680e301d673bceda922e ]

We update scaling settings when scaling mode has been changed.
However when changing mode from native resolution the scaling mode previously
set gets ignored.

Perform scaling settings update on modeset.

Signed-off-by: Roman Li <roman.li at amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas at amd.com>
Acked-by: Stylon Wang <stylon.wang at amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Sasha Levin <sashal at kernel.org>
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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 df26c07cb912..b413a7a2e92f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8291,7 +8291,8 @@ static int dm_update_crtc_state(struct amdgpu_display_manager *dm,
 	BUG_ON(dm_new_crtc_state->stream == NULL);
 	/* Scaling or underscan settings */
-	if (is_scaling_state_different(dm_old_conn_state, dm_new_conn_state))
+	if (is_scaling_state_different(dm_old_conn_state, dm_new_conn_state) ||
+				drm_atomic_crtc_needs_modeset(new_crtc_state))
 			&new_crtc_state->mode, dm_new_conn_state, dm_new_crtc_state->stream);

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