[Intel-gfx] [PATCH v3 06/25] drm/i915: Add helper to modeset a set of pipes

[Imre Deak]

Add intel_modeset_pipes_in_mask_early() to modeset a provided set of
pipes, used in a follow-up patch.

While at it add _late suffix to intel_modeset_all_pipes() for clarity
and add DocBook descriptions for the two exported functions.

v2:
- Add a flag controlling if active planes are force updated as well.
- Add DockBook descriptions.
v3:
- For clarity use _early/_late suffixes for the exported functions
  instead of the update_active_planes parameter. (Ville)

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/display/intel_cdclk.c   |  2 +-
 drivers/gpu/drm/i915/display/intel_display.c | 45 ++++++++++++++++++--
 drivers/gpu/drm/i915/display/intel_display.h |  6 ++-
 drivers/gpu/drm/i915/display/skl_watermark.c |  2 +-
 4 files changed, 47 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index ad5251ba6fe13..a2e20b25d6361 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -3139,7 +3139,7 @@ int intel_modeset_calc_cdclk(struct intel_atomic_state *state)
 	} else if (intel_cdclk_needs_modeset(&old_cdclk_state->actual,
 					     &new_cdclk_state->actual)) {
 		/* All pipes must be switched off while we change the cdclk. */
-		ret = intel_modeset_all_pipes(state, "CDCLK change");
+		ret = intel_modeset_all_pipes_late(state, "CDCLK change");
 		if (ret)
 			return ret;
 
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 6bbc9069754c4..27e6ea21e0a91 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5407,8 +5407,9 @@ intel_verify_planes(struct intel_atomic_state *state)
 			     plane_state->uapi.visible);
 }
 
-int intel_modeset_all_pipes(struct intel_atomic_state *state,
-			    const char *reason)
+static int intel_modeset_pipes_in_mask(struct intel_atomic_state *state,
+				       const char *reason, u8 mask,
+				       bool update_active_planes)
 {
 	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
 	struct intel_crtc *crtc;
@@ -5417,7 +5418,7 @@ int intel_modeset_all_pipes(struct intel_atomic_state *state,
 	 * Add all pipes to the state, and force
 	 * a modeset on all the active ones.
 	 */
-	for_each_intel_crtc(&dev_priv->drm, crtc) {
+	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc, mask) {
 		struct intel_crtc_state *crtc_state;
 		int ret;
 
@@ -5448,7 +5449,9 @@ int intel_modeset_all_pipes(struct intel_atomic_state *state,
 		if (ret)
 			return ret;
 
-		crtc_state->update_planes |= crtc_state->active_planes;
+		if (update_active_planes)
+			crtc_state->update_planes |= crtc_state->active_planes;
+
 		crtc_state->async_flip_planes = 0;
 		crtc_state->do_async_flip = false;
 	}
@@ -5456,6 +5459,40 @@ int intel_modeset_all_pipes(struct intel_atomic_state *state,
 	return 0;
 }
 
+/**
+ * intel_modeset_pipes_in_mask_early - force a full modeset on a set of pipes
+ * @state: intel atomic state
+ * @reason: the reason for the full modeset
+ * @mask: mask of pipes to modeset
+ *
+ * Force a full modeset on pipes in @mask due to the description in @reason.
+ * This function can be called only before new plane states are computed.
+ *
+ * Returns 0 in case of success, negative error code otherwise.
+ */
+int intel_modeset_pipes_in_mask_early(struct intel_atomic_state *state,
+				      const char *reason, u8 mask)
+{
+	return intel_modeset_pipes_in_mask(state, reason, mask, false);
+}
+
+/**
+ * intel_modeset_all_pipes_late - force a full modeset on all pipes
+ * @state: intel atomic state
+ * @reason: the reason for the full modeset
+ *
+ * Force a full modeset on all pipes due to the description in @reason.
+ * This function can be called only after new plane states are computed
+ * already.
+ *
+ * Returns 0 in case of success, negative error code otherwise.
+ */
+int intel_modeset_all_pipes_late(struct intel_atomic_state *state,
+				 const char *reason)
+{
+	return intel_modeset_pipes_in_mask(state, reason, -1, true);
+}
+
 /*
  * This implements the workaround described in the "notes" section of the mode
  * set sequence documentation. When going from no pipes or single pipe to
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 49ac8473b988b..64a5be7859331 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -513,8 +513,10 @@ void intel_plane_fixup_bitmasks(struct intel_crtc_state *crtc_state);
 void intel_update_watermarks(struct drm_i915_private *i915);
 
 /* modesetting */
-int intel_modeset_all_pipes(struct intel_atomic_state *state,
-			    const char *reason);
+int intel_modeset_pipes_in_mask_early(struct intel_atomic_state *state,
+				      const char *reason, u8 pipe_mask);
+int intel_modeset_all_pipes_late(struct intel_atomic_state *state,
+				 const char *reason);
 void intel_modeset_get_crtc_power_domains(struct intel_crtc_state *crtc_state,
 					  struct intel_power_domain_mask *old_domains);
 void intel_modeset_put_crtc_power_domains(struct intel_crtc *crtc,
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index 063929a42a42f..a29d9b717deed 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -2616,7 +2616,7 @@ skl_compute_ddb(struct intel_atomic_state *state)
 
 		if (old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) {
 			/* TODO: Implement vblank synchronized MBUS joining changes */
-			ret = intel_modeset_all_pipes(state, "MBUS joining change");
+			ret = intel_modeset_all_pipes_late(state, "MBUS joining change");
 			if (ret)
 				return ret;
 		}
-- 
2.37.2