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path: root/drivers/gpu/drm/i915/intel_display.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
-rw-r--r--drivers/gpu/drm/i915/intel_display.c38
1 files changed, 29 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b69440cf41ea..75105a2c59ea 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12005,9 +12005,6 @@ intel_compare_link_m_n(const struct intel_link_m_n *m_n,
m2_n2->gmch_m, m2_n2->gmch_n, !adjust) &&
intel_compare_m_n(m_n->link_m, m_n->link_n,
m2_n2->link_m, m2_n2->link_n, !adjust)) {
- if (adjust)
- *m2_n2 = *m_n;
-
return true;
}
@@ -13149,6 +13146,33 @@ static int calc_watermark_data(struct intel_atomic_state *state)
return 0;
}
+static void intel_crtc_check_fastset(struct intel_crtc_state *old_crtc_state,
+ struct intel_crtc_state *new_crtc_state)
+{
+ struct drm_i915_private *dev_priv =
+ to_i915(new_crtc_state->base.crtc->dev);
+
+ if (!intel_pipe_config_compare(dev_priv, old_crtc_state,
+ new_crtc_state, true))
+ return;
+
+ new_crtc_state->base.mode_changed = false;
+ new_crtc_state->update_pipe = true;
+
+ /*
+ * If we're not doing the full modeset we want to
+ * keep the current M/N values as they may be
+ * sufficiently different to the computed values
+ * to cause problems.
+ *
+ * FIXME: should really copy more fuzzy state here
+ */
+ new_crtc_state->fdi_m_n = old_crtc_state->fdi_m_n;
+ new_crtc_state->dp_m_n = old_crtc_state->dp_m_n;
+ new_crtc_state->dp_m2_n2 = old_crtc_state->dp_m2_n2;
+ new_crtc_state->has_drrs = old_crtc_state->has_drrs;
+}
+
/**
* intel_atomic_check - validate state object
* @dev: drm device
@@ -13197,12 +13221,8 @@ static int intel_atomic_check(struct drm_device *dev,
return ret;
}
- if (intel_pipe_config_compare(dev_priv,
- to_intel_crtc_state(old_crtc_state),
- pipe_config, true)) {
- crtc_state->mode_changed = false;
- pipe_config->update_pipe = true;
- }
+ intel_crtc_check_fastset(to_intel_crtc_state(old_crtc_state),
+ pipe_config);
if (needs_modeset(crtc_state))
any_ms = true;