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From 05d10aebe62239b014098c8e517dd96848f9a495 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Wed, 18 Nov 2020 10:47:58 +0100
Subject: [PATCH] drm: Pass the full state to connectors atomic
 functions
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

The current atomic helpers have either their object state being passed as
an argument or the full atomic state.

The former is the pattern that was done at first, before switching to the
latter for new hooks or when it was needed.

Now that the CRTCs have been converted, let's move forward with the
connectors to provide a consistent interface.

The conversion was done using the coccinelle script below, and built tested
on all the drivers.

@@
identifier connector, connector_state;
@@

 struct drm_connector_helper_funcs {
        ...
        struct drm_encoder* (*atomic_best_encoder)(struct drm_connector *connector,
-                                                  struct drm_connector_state *connector_state);
+                                                  struct drm_atomic_state *state);
        ...
}

@@
identifier connector, connector_state;
@@

 struct drm_connector_helper_funcs {
        ...
        void (*atomic_commit)(struct drm_connector *connector,
-                             struct drm_connector_state *connector_state);
+                             struct drm_atomic_state *state);
        ...
}

@@
struct drm_connector_helper_funcs *FUNCS;
identifier state;
identifier connector, connector_state;
identifier f;
@@

 f(..., struct drm_atomic_state *state, ...)
 {
        <+...
-       FUNCS->atomic_commit(connector, connector_state);
+       FUNCS->atomic_commit(connector, state);
        ...+>
 }

@@
struct drm_connector_helper_funcs *FUNCS;
identifier state;
identifier connector, connector_state;
identifier var, f;
@@

 f(struct drm_atomic_state *state, ...)
 {
        <+...
-       var = FUNCS->atomic_best_encoder(connector, connector_state);
+       var = FUNCS->atomic_best_encoder(connector, state);
        ...+>
 }

@ connector_atomic_func @
identifier helpers;
identifier func;
@@

(
static struct drm_connector_helper_funcs helpers = {
        ...,
        .atomic_best_encoder = func,
        ...,
};
|
static struct drm_connector_helper_funcs helpers = {
        ...,
        .atomic_commit = func,
        ...,
};
)

@@
identifier connector_atomic_func.func;
identifier connector;
symbol state;
@@

 func(struct drm_connector *connector,
-      struct drm_connector_state *state
+      struct drm_connector_state *connector_state
      )
 {
        ...
-       state
+       connector_state
        ...
 }

@ ignores_state @
identifier connector_atomic_func.func;
identifier connector, connector_state;
@@

 func(struct drm_connector *connector,
      struct drm_connector_state *connector_state)
{
        ... when != connector_state
}

@ adds_state depends on connector_atomic_func && !ignores_state @
identifier connector_atomic_func.func;
identifier connector, connector_state;
@@

 func(struct drm_connector *connector, struct drm_connector_state *connector_state)
 {
+       struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state, connector);
        ...
 }

@ depends on connector_atomic_func @
identifier connector_atomic_func.func;
identifier connector_state;
identifier connector;
@@

 func(struct drm_connector *connector,
-     struct drm_connector_state *connector_state
+     struct drm_atomic_state *state
           )
 { ... }

@ include depends on adds_state @
@@

 #include <drm/drm_atomic.h>

@ no_include depends on !include && adds_state @
@@

+ #include <drm/drm_atomic.h>
  #include <drm/...>

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.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: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Cc: Melissa Wen <melissa.srw@gmail.com>
Cc: Haneen Mohammed <hamohammed.sa@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201118094758.506730-1-maxime@cerno.tech
---
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c |  5 ++++-
 drivers/gpu/drm/drm_atomic_helper.c                 |  8 ++++----
 drivers/gpu/drm/i915/display/intel_dp_mst.c         |  7 +++++--
 drivers/gpu/drm/nouveau/dispnv50/disp.c             |  5 ++++-
 drivers/gpu/drm/vc4/vc4_txp.c                       |  4 +++-
 drivers/gpu/drm/vkms/vkms_writeback.c               |  8 ++++++--
 include/drm/drm_modeset_helper_vtables.h            | 13 ++++++-------
 7 files changed, 32 insertions(+), 18 deletions(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -24,6 +24,7 @@
  */
 
 #include <linux/version.h>
+#include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_dp_mst_helper.h>
 #include <drm/drm_dp_helper.h>
@@ -264,8 +265,10 @@ static int dm_dp_mst_get_modes(struct dr
 
 static struct drm_encoder *
 dm_mst_atomic_best_encoder(struct drm_connector *connector,
-                          struct drm_connector_state *connector_state)
+                          struct drm_atomic_state *state)
 {
+       struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
+                                                                                        connector);
        struct drm_device *dev = connector->dev;
        struct amdgpu_device *adev = drm_to_adev(dev);
        struct amdgpu_crtc *acrtc = to_amdgpu_crtc(connector_state->crtc);
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -122,7 +122,8 @@ static int handle_conflicting_encoders(s
                        continue;
 
                if (funcs->atomic_best_encoder)
-                       new_encoder = funcs->atomic_best_encoder(connector, new_conn_state);
+                       new_encoder = funcs->atomic_best_encoder(connector,
+                                                                state);
                else if (funcs->best_encoder)
                        new_encoder = funcs->best_encoder(connector);
                else
@@ -345,8 +346,7 @@ update_connector_routing(struct drm_atom
        funcs = connector->helper_private;
 
        if (funcs->atomic_best_encoder)
-               new_encoder = funcs->atomic_best_encoder(connector,
-                                                        new_connector_state);
+               new_encoder = funcs->atomic_best_encoder(connector, state);
        else if (funcs->best_encoder)
                new_encoder = funcs->best_encoder(connector);
        else
@@ -1318,7 +1318,7 @@ static void drm_atomic_helper_commit_wri
 
                if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) {
                        WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);
-                       funcs->atomic_commit(connector, new_conn_state);
+                       funcs->atomic_commit(connector, old_state);
                }
        }
 }
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -23,6 +23,7 @@
  *
  */
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_probe_helper.h>
@@ -708,11 +709,13 @@ intel_dp_mst_mode_valid_ctx(struct drm_c
 }
 
 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
-                                                        struct drm_connector_state *state)
+                                                        struct drm_atomic_state *state)
 {
+       struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
+                                                                                        connector);
        struct intel_connector *intel_connector = to_intel_connector(connector);
        struct intel_dp *intel_dp = intel_connector->mst_port;
-       struct intel_crtc *crtc = to_intel_crtc(state->crtc);
+       struct intel_crtc *crtc = to_intel_crtc(connector_state->crtc);
 
        return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 }
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -32,6 +32,7 @@
 #include <linux/hdmi.h>
 #include <linux/component.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_edid.h>
@@ -1161,8 +1162,10 @@ nv50_msto_new(struct drm_device *dev, st
 
 static struct drm_encoder *
 nv50_mstc_atomic_best_encoder(struct drm_connector *connector,
-                             struct drm_connector_state *connector_state)
+                             struct drm_atomic_state *state)
 {
+       struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
+                                                                                        connector);
        struct nv50_mstc *mstc = nv50_mstc(connector);
        struct drm_crtc *crtc = connector_state->crtc;
 
--- a/drivers/gpu/drm/vc4/vc4_txp.c
+++ b/drivers/gpu/drm/vc4/vc4_txp.c
@@ -273,8 +273,10 @@ static int vc4_txp_connector_atomic_chec
 }
 
 static void vc4_txp_connector_atomic_commit(struct drm_connector *conn,
-                                       struct drm_connector_state *conn_state)
+                                       struct drm_atomic_state *state)
 {
+       struct drm_connector_state *conn_state = drm_atomic_get_new_connector_state(state,
+                                                                                   conn);
        struct vc4_txp *txp = connector_to_vc4_txp(conn);
        struct drm_gem_cma_object *gem;
        struct drm_display_mode *mode;
--- a/drivers/gpu/drm/vkms/vkms_writeback.c
+++ b/drivers/gpu/drm/vkms/vkms_writeback.c
@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0+
 
 #include "vkms_drv.h"
+
+#include <drm/drm_atomic.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_writeback.h>
 #include <drm/drm_probe_helper.h>
@@ -100,8 +102,10 @@ static void vkms_wb_cleanup_job(struct d
 }
 
 static void vkms_wb_atomic_commit(struct drm_connector *conn,
-                                 struct drm_connector_state *state)
+                                 struct drm_atomic_state *state)
 {
+       struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
+                                                                                        conn);
        struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev);
        struct vkms_output *output = &vkmsdev->output;
        struct drm_writeback_connector *wb_conn = &output->wb_connector;
@@ -117,7 +121,7 @@ static void vkms_wb_atomic_commit(struct
        crtc_state->active_writeback = conn_state->writeback_job->priv;
        crtc_state->wb_pending = true;
        spin_unlock_irq(&output->composer_lock);
-       drm_writeback_queue_job(wb_conn, state);
+       drm_writeback_queue_job(wb_conn, connector_state);
 }
 
 static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -1044,9 +1044,8 @@ struct drm_connector_helper_funcs {
         * NOTE:
         *
         * This function is called in the check phase of an atomic update. The
-        * driver is not allowed to change anything outside of the free-standing
-        * state objects passed-in or assembled in the overall &drm_atomic_state
-        * update tracking structure.
+        * driver is not allowed to change anything outside of the
+        * &drm_atomic_state update tracking structure passed in.
         *
         * RETURNS:
         *
@@ -1056,7 +1055,7 @@ struct drm_connector_helper_funcs {
         * for this.
         */
        struct drm_encoder *(*atomic_best_encoder)(struct drm_connector *connector,
-                                                  struct drm_connector_state *connector_state);
+                                                  struct drm_atomic_state *state);
 
        /**
         * @atomic_check:
@@ -1097,15 +1096,15 @@ struct drm_connector_helper_funcs {
         *
         * This hook is to be used by drivers implementing writeback connectors
         * that need a point when to commit the writeback job to the hardware.
-        * The writeback_job to commit is available in
-        * &drm_connector_state.writeback_job.
+        * The writeback_job to commit is available in the new connector state,
+        * in &drm_connector_state.writeback_job.
         *
         * This hook is optional.
         *
         * This callback is used by the atomic modeset helpers.
         */
        void (*atomic_commit)(struct drm_connector *connector,
-                             struct drm_connector_state *state);
+                             struct drm_atomic_state *state);
 
        /**
         * @prepare_writeback_job: