[Intel-gfx] [PATCH 1/2] drm/i915: Make intel_mpllb_state_verify() safer

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

intel_mpllb_state_verify() blows up if you call it for a
non-modeset/fastset commit on account of the relevant
connector not being part of the overall atomic state.
Currently the state checker only runs for modeset/fastset
commits, but for testing purposes it is sometimes desirable
to run it for other commits too. Check for modeset/fastset
in intel_mpllb_state_verify() itself to make this safe.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_snps_phy.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.c b/drivers/gpu/drm/i915/display/intel_snps_phy.c
index 1cfb94b5cedb..4efc79d47e43 100644
--- a/drivers/gpu/drm/i915/display/intel_snps_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_snps_phy.c
@@ -2007,6 +2007,10 @@ void intel_mpllb_state_verify(struct intel_atomic_state *state,
 	if (!new_crtc_state->hw.active)
 		return;
 
+	if (!intel_crtc_needs_modeset(new_crtc_state) &&
+	    !intel_crtc_needs_fastset(new_crtc_state))
+		return;
+
 	encoder = intel_get_crtc_new_encoder(state, new_crtc_state);
 	intel_mpllb_readout_hw_state(encoder, &mpllb_hw_state);
 
-- 
2.39.2