drm/i915: Call intel_pre_plane_updates() also for pipes getting enabled

[ Upstream commit d21a3962d3042e6f56ad324cf18bdd64a1e6ecfa ]

We used to call intel_pre_plane_updates() for any pipe going through
a modeset whether the pipe was previously enabled or not. This in
fact needed to apply all the necessary clock gating workarounds/etc.
Restore the correct behaviour.

Fixes: 39919997322f ("drm/i915: Disable all planes before modesetting any pipes")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231121054324.9988-3-ville.syrjala@linux.intel.com
(cherry picked from commit e0d5ce11ed0a21bb2bf328ad82fd261783c7ad88)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 2e0daad..a072fbb 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6670,10 +6670,11 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
                if (!intel_crtc_needs_modeset(new_crtc_state))
                        continue;
 
+               intel_pre_plane_update(state, crtc);
+
                if (!old_crtc_state->hw.active)
                        continue;
 
-               intel_pre_plane_update(state, crtc);
                intel_crtc_disable_planes(state, crtc);
        }