drm: Convert connector_helper_funcs->atomic_check to accept drm_atomic_state

Everyone who implements connector_helper_funcs->atomic_check reaches
into the connector state to get the atomic state. Instead of continuing
this pattern, change the callback signature to just give atomic state
and let the driver determine what it does and does not need from it.

Eventually all atomic functions should do this, but that's just too much
busy work for me.

Changes in v3:
- Added to the set
Changes in v4:
- None
Changes in v5:
- intel_digital_connector_atomic_check declaration moved to i915_atomic.h

Link to v3: https://patchwork.freedesktop.org/patch/msgid/20190502194956.218441-5-sean@poorly.run
Link to v4: https://patchwork.freedesktop.org/patch/msgid/20190508160920.144739-5-sean@poorly.run

Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc: Eric Anholt <eric@anholt.net>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> [for rcar lvds]
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190611160844.257498-5-sean@poorly.run

10 files changed, 37 insertions, 27 deletions

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 2133f6253917..e58be6996069 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -686,7 +686,7 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 		}
 
 		if (funcs->atomic_check)
-			ret = funcs->atomic_check(connector, new_connector_state);
+			ret = funcs->atomic_check(connector, state);
 		if (ret)
 			return ret;
 
@@ -728,7 +728,7 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 			continue;
 
 		if (funcs->atomic_check)
-			ret = funcs->atomic_check(connector, new_connector_state);
+			ret = funcs->atomic_check(connector, state);
 		if (ret)
 			return ret;
 	}
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 58b8049649a0..ab40448a19d5 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -106,12 +106,14 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
 }
 
 int intel_digital_connector_atomic_check(struct drm_connector *conn,
-					 struct drm_connector_state *new_state)
+					 struct drm_atomic_state *state)
 {
+	struct drm_connector_state *new_state =
+		drm_atomic_get_new_connector_state(state, conn);
 	struct intel_digital_connector_state *new_conn_state =
 		to_intel_digital_connector_state(new_state);
 	struct drm_connector_state *old_state =
-		drm_atomic_get_old_connector_state(new_state->state, conn);
+		drm_atomic_get_old_connector_state(state, conn);
 	struct intel_digital_connector_state *old_conn_state =
 		to_intel_digital_connector_state(old_state);
 	struct drm_crtc_state *crtc_state;
@@ -121,7 +123,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
 	if (!new_state->crtc)
 		return 0;
 
-	crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
+	crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
 
 	/*
 	 * These properties are handled by fastset, and might not end
diff --git a/drivers/gpu/drm/i915/intel_atomic.h b/drivers/gpu/drm/i915/intel_atomic.h
index 1c8507da1a69..58065d3161a3 100644
--- a/drivers/gpu/drm/i915/intel_atomic.h
+++ b/drivers/gpu/drm/i915/intel_atomic.h
@@ -28,7 +28,7 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
 						struct drm_property *property,
 						u64 val);
 int intel_digital_connector_atomic_check(struct drm_connector *conn,
-					 struct drm_connector_state *new_state);
+					 struct drm_atomic_state *state);
 struct drm_connector_state *
 intel_digital_connector_duplicate_state(struct drm_connector *connector);
 
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 0caf645fbbb8..60652ebbdf61 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -151,9 +151,10 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 
 static int
 intel_dp_mst_atomic_check(struct drm_connector *connector,
-			  struct drm_connector_state *new_conn_state)
+			  struct drm_atomic_state *state)
 {
-	struct drm_atomic_state *state = new_conn_state->state;
+	struct drm_connector_state *new_conn_state =
+		drm_atomic_get_new_connector_state(state, connector);
 	struct drm_connector_state *old_conn_state =
 		drm_atomic_get_old_connector_state(state, connector);
 	struct intel_connector *intel_connector =
@@ -163,7 +164,7 @@ intel_dp_mst_atomic_check(struct drm_connector *connector,
 	struct drm_dp_mst_topology_mgr *mgr;
 	int ret;
 
-	ret = intel_digital_connector_atomic_check(connector, new_conn_state);
+	ret = intel_digital_connector_atomic_check(connector, state);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 6c98b35790db..368b99f6f7fb 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -2353,9 +2353,10 @@ static const struct drm_connector_funcs intel_sdvo_connector_funcs = {
 };
 
 static int intel_sdvo_atomic_check(struct drm_connector *conn,
-				   struct drm_connector_state *new_conn_state)
+				   struct drm_atomic_state *state)
 {
-	struct drm_atomic_state *state = new_conn_state->state;
+	struct drm_connector_state *new_conn_state =
+		drm_atomic_get_new_connector_state(state, conn);
 	struct drm_connector_state *old_conn_state =
 		drm_atomic_get_old_connector_state(state, conn);
 	struct intel_sdvo_connector_state *old_state =
@@ -2367,13 +2368,13 @@ static int intel_sdvo_atomic_check(struct drm_connector *conn,
 	    (memcmp(&old_state->tv, &new_state->tv, sizeof(old_state->tv)) ||
 	     memcmp(&old_conn_state->tv, &new_conn_state->tv, sizeof(old_conn_state->tv)))) {
 		struct drm_crtc_state *crtc_state =
-			drm_atomic_get_new_crtc_state(new_conn_state->state,
+			drm_atomic_get_new_crtc_state(state,
 						      new_conn_state->crtc);
 
 		crtc_state->connectors_changed = true;
 	}
 
-	return intel_digital_connector_atomic_check(conn, new_conn_state);
+	return intel_digital_connector_atomic_check(conn, state);
 }
 
 static const struct drm_connector_helper_funcs intel_sdvo_connector_helper_funcs = {
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 5dc594eafaf2..0a95df6c6a57 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1821,16 +1821,18 @@ static const struct drm_connector_funcs intel_tv_connector_funcs = {
 };
 
 static int intel_tv_atomic_check(struct drm_connector *connector,
-				 struct drm_connector_state *new_state)
+				 struct drm_atomic_state *state)
 {
+	struct drm_connector_state *new_state;
 	struct drm_crtc_state *new_crtc_state;
 	struct drm_connector_state *old_state;
 
+	new_state = drm_atomic_get_new_connector_state(state, connector);
 	if (!new_state->crtc)
 		return 0;
 
-	old_state = drm_atomic_get_old_connector_state(new_state->state, connector);
-	new_crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
+	old_state = drm_atomic_get_old_connector_state(state, connector);
+	new_crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
 
 	if (old_state->tv.mode != new_state->tv.mode ||
 	    old_state->tv.margins.left != new_state->tv.margins.left ||
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 4b1650f51955..7ba373f493b2 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -948,11 +948,12 @@ nv50_mstc_get_modes(struct drm_connector *connector)
 
 static int
 nv50_mstc_atomic_check(struct drm_connector *connector,
-		       struct drm_connector_state *new_conn_state)
+		       struct drm_atomic_state *state)
 {
-	struct drm_atomic_state *state = new_conn_state->state;
 	struct nv50_mstc *mstc = nv50_mstc(connector);
 	struct drm_dp_mst_topology_mgr *mgr = &mstc->mstm->mgr;
+	struct drm_connector_state *new_conn_state =
+		drm_atomic_get_new_connector_state(state, connector);
 	struct drm_connector_state *old_conn_state =
 		drm_atomic_get_old_connector_state(state, connector);
 	struct drm_crtc_state *crtc_state;
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
index 620b51aab291..5b81ba2a7f27 100644
--- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -92,13 +92,15 @@ static int rcar_lvds_connector_get_modes(struct drm_connector *connector)
 }
 
 static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
-					    struct drm_connector_state *state)
+					    struct drm_atomic_state *state)
 {
 	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
 	const struct drm_display_mode *panel_mode;
+	struct drm_connector_state *conn_state;
 	struct drm_crtc_state *crtc_state;
 
-	if (!state->crtc)
+	conn_state = drm_atomic_get_new_connector_state(state, connector);
+	if (!conn_state->crtc)
 		return 0;
 
 	if (list_empty(&connector->modes)) {
@@ -110,9 +112,9 @@ static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
 				      struct drm_display_mode, head);
 
 	/* We're not allowed to modify the resolution. */
-	crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
-	if (IS_ERR(crtc_state))
-		return PTR_ERR(crtc_state);
+	crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc);
+	if (!crtc_state)
+		return -EINVAL;
 
 	if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
 	    crtc_state->mode.vdisplay != panel_mode->vdisplay)
diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c
index c8b89a78f9f4..96f91c1b4b6e 100644
--- a/drivers/gpu/drm/vc4/vc4_txp.c
+++ b/drivers/gpu/drm/vc4/vc4_txp.c
@@ -221,17 +221,18 @@ static const u32 txp_fmts[] = {
 };
 
 static int vc4_txp_connector_atomic_check(struct drm_connector *conn,
-					struct drm_connector_state *conn_state)
+					  struct drm_atomic_state *state)
 {
+	struct drm_connector_state *conn_state;
 	struct drm_crtc_state *crtc_state;
 	struct drm_framebuffer *fb;
 	int i;
 
+	conn_state = drm_atomic_get_new_connector_state(state, conn);
 	if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
 		return 0;
 
-	crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
-						   conn_state->crtc);
+	crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
 
 	fb = conn_state->writeback_job->fb;
 	if (fb->width != crtc_state->mode.hdisplay ||
diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
index 13f0e3ca0a29..f36be43bd052 100644
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -1028,7 +1028,7 @@ struct drm_connector_helper_funcs {
 	 * deadlock.
 	 */
 	int (*atomic_check)(struct drm_connector *connector,
-			    struct drm_connector_state *state);
+			    struct drm_atomic_state *state);
 
 	/**
 	 * @atomic_commit: