[PATCH 36/44] drm/i915/dp: Add DP tunnel atomic state and check BW limit

[Imre Deak]

Add the atomic state during a modeset required to enable the DP tunnel
BW allocation mode on links where such a tunnel was detected.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/display/intel_atomic.c  |  8 ++++++++
 drivers/gpu/drm/i915/display/intel_display.c | 19 +++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_link_bw.c |  5 +++++
 3 files changed, 32 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index 96ab37e158995..4236740ede9ed 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -260,6 +260,10 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
 	if (crtc_state->post_csc_lut)
 		drm_property_blob_get(crtc_state->post_csc_lut);
 
+	if (crtc_state->dp_tunnel_ref.tunnel)
+		drm_dp_tunnel_ref_get(old_crtc_state->dp_tunnel_ref.tunnel,
+					&crtc_state->dp_tunnel_ref);
+
 	crtc_state->update_pipe = false;
 	crtc_state->update_m_n = false;
 	crtc_state->update_lrr = false;
@@ -311,6 +315,8 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
 
 	__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
 	intel_crtc_free_hw_state(crtc_state);
+	if (crtc_state->dp_tunnel_ref.tunnel)
+		drm_dp_tunnel_ref_put(&crtc_state->dp_tunnel_ref);
 	kfree(crtc_state);
 }
 
@@ -346,6 +352,8 @@ void intel_atomic_state_clear(struct drm_atomic_state *s)
 	/* state->internal not reset on purpose */
 
 	state->dpll_set = state->modeset = false;
+
+	intel_dp_tunnel_atomic_cleanup_inherited_state(state);
 }
 
 struct intel_crtc_state *
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index b9f985a5e705b..46b27a32c8640 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -33,6 +33,7 @@
 #include <linux/string_helpers.h>
 
 #include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_dp_tunnel.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_atomic_uapi.h>
@@ -73,6 +74,7 @@
 #include "intel_dp.h"
 #include "intel_dp_link_training.h"
 #include "intel_dp_mst.h"
+#include "intel_dp_tunnel.h"
 #include "intel_dpll.h"
 #include "intel_dpll_mgr.h"
 #include "intel_dpt.h"
@@ -4490,6 +4492,8 @@ copy_bigjoiner_crtc_state_modeset(struct intel_atomic_state *state,
 	saved_state->crc_enabled = slave_crtc_state->crc_enabled;
 
 	intel_crtc_free_hw_state(slave_crtc_state);
+	if (slave_crtc_state->dp_tunnel_ref.tunnel)
+		drm_dp_tunnel_ref_put(&slave_crtc_state->dp_tunnel_ref);
 	memcpy(slave_crtc_state, saved_state, sizeof(*slave_crtc_state));
 	kfree(saved_state);
 
@@ -4505,6 +4509,10 @@ copy_bigjoiner_crtc_state_modeset(struct intel_atomic_state *state,
 		      &master_crtc_state->hw.adjusted_mode);
 	slave_crtc_state->hw.scaling_filter = master_crtc_state->hw.scaling_filter;
 
+	if (master_crtc_state->dp_tunnel_ref.tunnel)
+		drm_dp_tunnel_ref_get(master_crtc_state->dp_tunnel_ref.tunnel,
+					&slave_crtc_state->dp_tunnel_ref);
+
 	copy_bigjoiner_crtc_state_nomodeset(state, slave_crtc);
 
 	slave_crtc_state->uapi.mode_changed = master_crtc_state->uapi.mode_changed;
@@ -4533,6 +4541,13 @@ intel_crtc_prepare_cleared_state(struct intel_atomic_state *state,
 	/* free the old crtc_state->hw members */
 	intel_crtc_free_hw_state(crtc_state);
 
+	if (crtc_state->dp_tunnel_ref.tunnel) {
+		drm_dp_tunnel_atomic_set_stream_bw(&state->base,
+						   crtc_state->dp_tunnel_ref.tunnel,
+						   crtc->pipe, 0);
+		drm_dp_tunnel_ref_put(&crtc_state->dp_tunnel_ref);
+	}
+
 	/* FIXME: before the switch to atomic started, a new pipe_config was
 	 * kzalloc'd. Code that depends on any field being zero should be
 	 * fixed, so that the crtc_state can be safely duplicated. For now,
@@ -5374,6 +5389,10 @@ static int intel_modeset_pipe(struct intel_atomic_state *state,
 	if (ret)
 		return ret;
 
+	ret = intel_dp_tunnel_atomic_add_state_for_crtc(state, crtc);
+	if (ret)
+		return ret;
+
 	ret = intel_dp_mst_add_topology_state_for_crtc(state, crtc);
 	if (ret)
 		return ret;
diff --git a/drivers/gpu/drm/i915/display/intel_link_bw.c b/drivers/gpu/drm/i915/display/intel_link_bw.c
index 9c6d35a405a18..5b539ba996ddf 100644
--- a/drivers/gpu/drm/i915/display/intel_link_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_link_bw.c
@@ -8,6 +8,7 @@
 #include "intel_atomic.h"
 #include "intel_display_types.h"
 #include "intel_dp_mst.h"
+#include "intel_dp_tunnel.h"
 #include "intel_fdi.h"
 #include "intel_link_bw.h"
 
@@ -149,6 +150,10 @@ static int check_all_link_config(struct intel_atomic_state *state,
 	if (ret)
 		return ret;
 
+	ret = intel_dp_tunnel_atomic_check_link(state, limits);
+	if (ret)
+		return ret;
+
 	ret = intel_fdi_atomic_check_link(state, limits);
 	if (ret)
 		return ret;
-- 
2.39.2