[PATCH v2 1/6] drm/msm: Use drm_private_obj/state instead of subclassing

From: Sean Paul
Date: Wed Mar 28 2018 - 15:08:15 EST

Now that we have private state handled by the core, we can use those
instead of rolling our own swap_state for private data.

Originally posted here: https://patchwork.freedesktop.org/patch/211361/

Changes in v2:
- Use state->state in disp duplicate_state callback (Jeykumar)
Changes in v3:
- Update comment describing msm_kms_state (Jeykumar)
Changes in v4:
- Rebased on msm-next
- Don't always use private state from atomic state (Archit)
- Renamed some of the state accessors
- Tested on mdp5 db410c
Changes in v5:
- None

Cc: Jeykumar Sankaran <jsanka@xxxxxxxxxxxxxx>
Cc: Archit Taneja <architt@xxxxxxxxxxxxxx>
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 77 ++++++++++---------
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h | 11 +--
drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.c | 12 ++-
drivers/gpu/drm/msm/disp/mdp5/mdp5_pipe.c | 28 ++++---
drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c | 19 +++--
drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.h | 4 +-
drivers/gpu/drm/msm/msm_atomic.c | 37 ---------
drivers/gpu/drm/msm/msm_drv.c | 87 +++++++++++++++++++++-
drivers/gpu/drm/msm/msm_drv.h | 3 -
drivers/gpu/drm/msm/msm_kms.h | 21 ++++--
10 files changed, 183 insertions(+), 116 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 6d8e3a9a6fc0..366670043190 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -70,60 +70,62 @@ static int mdp5_hw_init(struct msm_kms *kms)
return 0;
}

-struct mdp5_state *mdp5_get_state(struct drm_atomic_state *s)
+struct mdp5_state *mdp5_state_from_atomic(struct drm_atomic_state *state)
{
- struct msm_drm_private *priv = s->dev->dev_private;
- struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
- struct msm_kms_state *state = to_kms_state(s);
- struct mdp5_state *new_state;
- int ret;
+ struct msm_kms_state *kms_state = msm_kms_state_from_atomic(state);

- if (state->state)
- return state->state;
+ if (IS_ERR_OR_NULL(kms_state))
+ return (struct mdp5_state *)kms_state; /* casting ERR_PTR */

- ret = drm_modeset_lock(&mdp5_kms->state_lock, s->acquire_ctx);
- if (ret)
- return ERR_PTR(ret);
+ return kms_state->state;
+}

- new_state = kmalloc(sizeof(*mdp5_kms->state), GFP_KERNEL);
- if (!new_state)
- return ERR_PTR(-ENOMEM);
+struct mdp5_state *mdp5_state_from_dev(struct drm_device *dev)
+{
+ struct msm_kms_state *kms_state = msm_kms_state_from_dev(dev);

- /* Copy state: */
- new_state->hwpipe = mdp5_kms->state->hwpipe;
- new_state->hwmixer = mdp5_kms->state->hwmixer;
- if (mdp5_kms->smp)
- new_state->smp = mdp5_kms->state->smp;
+ if (IS_ERR_OR_NULL(kms_state))
+ return (struct mdp5_state *)kms_state; /* casting ERR_PTR */

- state->state = new_state;
+ return kms_state->state;
+}
+
+static void *mdp5_duplicate_state(void *state)
+{
+ if (!state)
+ return kzalloc(sizeof(struct mdp5_state), GFP_KERNEL);

- return new_state;
+ return kmemdup(state, sizeof(struct mdp5_state), GFP_KERNEL);
}

-static void mdp5_swap_state(struct msm_kms *kms, struct drm_atomic_state *state)
+static void mdp5_destroy_state(void *state)
{
- struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
- swap(to_kms_state(state)->state, mdp5_kms->state);
+ struct mdp5_state *mdp_state = (struct mdp5_state *)state;
+ kfree(mdp_state);
}

-static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
+static void mdp5_prepare_commit(struct msm_kms *kms,
+ struct drm_atomic_state *old_state)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
+ struct mdp5_state *mdp5_state = mdp5_state_from_dev(mdp5_kms->dev);
struct device *dev = &mdp5_kms->pdev->dev;

pm_runtime_get_sync(dev);

if (mdp5_kms->smp)
- mdp5_smp_prepare_commit(mdp5_kms->smp, &mdp5_kms->state->smp);
+ mdp5_smp_prepare_commit(mdp5_kms->smp, &mdp5_state->smp);
}

-static void mdp5_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state)
+static void mdp5_complete_commit(struct msm_kms *kms,
+ struct drm_atomic_state *old_state)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
+ struct mdp5_state *mdp5_state = mdp5_state_from_dev(mdp5_kms->dev);
struct device *dev = &mdp5_kms->pdev->dev;

if (mdp5_kms->smp)
- mdp5_smp_complete_commit(mdp5_kms->smp, &mdp5_kms->state->smp);
+ mdp5_smp_complete_commit(mdp5_kms->smp, &mdp5_state->smp);

pm_runtime_put_sync(dev);
}
@@ -229,7 +231,8 @@ static const struct mdp_kms_funcs kms_funcs = {
.irq = mdp5_irq,
.enable_vblank = mdp5_enable_vblank,
.disable_vblank = mdp5_disable_vblank,
- .swap_state = mdp5_swap_state,
+ .duplicate_state = mdp5_duplicate_state,
+ .destroy_state = mdp5_destroy_state,
.prepare_commit = mdp5_prepare_commit,
.complete_commit = mdp5_complete_commit,
.wait_for_crtc_commit_done = mdp5_wait_for_crtc_commit_done,
@@ -726,8 +729,6 @@ static void mdp5_destroy(struct platform_device *pdev)

if (mdp5_kms->rpm_enabled)
pm_runtime_disable(&pdev->dev);
-
- kfree(mdp5_kms->state);
}

static int construct_pipes(struct mdp5_kms *mdp5_kms, int cnt,
@@ -859,7 +860,8 @@ static int interface_init(struct mdp5_kms *mdp5_kms)
return 0;
}

-static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
+static int mdp5_init(struct platform_device *pdev, struct drm_device *dev,
+ struct msm_kms_state *initial_state)
{
struct msm_drm_private *priv = dev->dev_private;
struct mdp5_kms *mdp5_kms;
@@ -880,9 +882,8 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
mdp5_kms->dev = dev;
mdp5_kms->pdev = pdev;

- drm_modeset_lock_init(&mdp5_kms->state_lock);
- mdp5_kms->state = kzalloc(sizeof(*mdp5_kms->state), GFP_KERNEL);
- if (!mdp5_kms->state) {
+ initial_state->state = mdp5_duplicate_state(NULL);
+ if (!initial_state->state) {
ret = -ENOMEM;
goto fail;
}
@@ -940,7 +941,8 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
* this section initializes the SMP:
*/
if (mdp5_kms->caps & MDP_CAP_SMP) {
- mdp5_kms->smp = mdp5_smp_init(mdp5_kms, &config->hw->smp);
+ mdp5_kms->smp = mdp5_smp_init(mdp5_kms, &config->hw->smp,
+ initial_state->state);
if (IS_ERR(mdp5_kms->smp)) {
ret = PTR_ERR(mdp5_kms->smp);
mdp5_kms->smp = NULL;
@@ -980,10 +982,11 @@ static int mdp5_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *ddev = dev_get_drvdata(master);
struct platform_device *pdev = to_platform_device(dev);
+ struct msm_kms_state *initial_state = (struct msm_kms_state *)data;

DBG("");

- return mdp5_init(pdev, ddev);
+ return mdp5_init(pdev, ddev, initial_state);
}

static void mdp5_unbind(struct device *dev, struct device *master,
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h
index 425a03d213e5..e23117b82aad 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h
@@ -28,8 +28,6 @@
#include "mdp5_ctl.h"
#include "mdp5_smp.h"

-struct mdp5_state;
-
struct mdp5_kms {
struct mdp_kms base;

@@ -49,12 +47,6 @@ struct mdp5_kms {
struct mdp5_cfg_handler *cfg;
uint32_t caps; /* MDP capabilities (MDP_CAP_XXX bits) */

- /**
- * Global atomic state. Do not access directly, use mdp5_get_state()
- */
- struct mdp5_state *state;
- struct drm_modeset_lock state_lock;
-
struct mdp5_smp *smp;
struct mdp5_ctl_manager *ctlm;

@@ -93,7 +85,8 @@ struct mdp5_state {
};

struct mdp5_state *__must_check
-mdp5_get_state(struct drm_atomic_state *s);
+mdp5_state_from_atomic(struct drm_atomic_state *s);
+struct mdp5_state *__must_check mdp5_state_from_dev(struct drm_device *dev);

/* Atomic plane state. Subclasses the base drm_plane_state in order to
* track assigned hwpipe and hw specific state.
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.c
index 8a00991f03c7..fdd5e12a9d56 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.c
@@ -52,10 +52,11 @@ int mdp5_mixer_assign(struct drm_atomic_state *s, struct drm_crtc *crtc,
{
struct msm_drm_private *priv = s->dev->dev_private;
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
- struct mdp5_state *state = mdp5_get_state(s);
+ struct mdp5_state *state;
struct mdp5_hw_mixer_state *new_state;
int i;

+ state = mdp5_state_from_atomic(s);
if (IS_ERR(state))
return PTR_ERR(state);

@@ -129,12 +130,17 @@ int mdp5_mixer_assign(struct drm_atomic_state *s, struct drm_crtc *crtc,

void mdp5_mixer_release(struct drm_atomic_state *s, struct mdp5_hw_mixer *mixer)
{
- struct mdp5_state *state = mdp5_get_state(s);
- struct mdp5_hw_mixer_state *new_state = &state->hwmixer;
+ struct mdp5_state *state;
+ struct mdp5_hw_mixer_state *new_state;

if (!mixer)
return;

+ state = mdp5_state_from_atomic(s);
+ if (IS_ERR(state))
+ return;
+
+ new_state = &state->hwmixer;
if (WARN_ON(!new_state->hwmixer_to_crtc[mixer->idx]))
return;

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_pipe.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_pipe.c
index ff52c49095f9..dc66ab9fdd50 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_pipe.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_pipe.c
@@ -24,17 +24,20 @@ int mdp5_pipe_assign(struct drm_atomic_state *s, struct drm_plane *plane,
{
struct msm_drm_private *priv = s->dev->dev_private;
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
- struct mdp5_state *state;
+ struct mdp5_state *old_mdp5_state, *new_mdp5_state;
struct mdp5_hw_pipe_state *old_state, *new_state;
int i, j;

- state = mdp5_get_state(s);
- if (IS_ERR(state))
- return PTR_ERR(state);
+ new_mdp5_state = mdp5_state_from_atomic(s);
+ if (IS_ERR(new_mdp5_state))
+ return PTR_ERR(new_mdp5_state);

- /* grab old_state after mdp5_get_state(), since now we hold lock: */
- old_state = &mdp5_kms->state->hwpipe;
- new_state = &state->hwpipe;
+ old_mdp5_state = mdp5_state_from_dev(s->dev);
+ if (IS_ERR(old_mdp5_state))
+ return PTR_ERR(old_mdp5_state);
+
+ old_state = &old_mdp5_state->hwpipe;
+ new_state = &new_mdp5_state->hwpipe;

for (i = 0; i < mdp5_kms->num_hwpipes; i++) {
struct mdp5_hw_pipe *cur = mdp5_kms->hwpipes[i];
@@ -107,7 +110,7 @@ int mdp5_pipe_assign(struct drm_atomic_state *s, struct drm_plane *plane,
WARN_ON(r_hwpipe);

DBG("%s: alloc SMP blocks", (*hwpipe)->name);
- ret = mdp5_smp_assign(mdp5_kms->smp, &state->smp,
+ ret = mdp5_smp_assign(mdp5_kms->smp, &new_mdp5_state->smp,
(*hwpipe)->pipe, blkcfg);
if (ret)
return -ENOMEM;
@@ -132,12 +135,17 @@ void mdp5_pipe_release(struct drm_atomic_state *s, struct mdp5_hw_pipe *hwpipe)
{
struct msm_drm_private *priv = s->dev->dev_private;
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
- struct mdp5_state *state = mdp5_get_state(s);
- struct mdp5_hw_pipe_state *new_state = &state->hwpipe;
+ struct mdp5_state *state;
+ struct mdp5_hw_pipe_state *new_state;

if (!hwpipe)
return;

+ state = mdp5_state_from_atomic(s);
+ if (IS_ERR(state))
+ return;
+
+ new_state = &state->hwpipe;
if (WARN_ON(!new_state->hwpipe_to_plane[hwpipe->idx]))
return;

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
index ae4983d9d0a5..918e4123e781 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
@@ -338,6 +338,7 @@ void mdp5_smp_complete_commit(struct mdp5_smp *smp, struct mdp5_smp_state *state
void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p)
{
struct mdp5_kms *mdp5_kms = get_kms(smp);
+ struct mdp5_state *mdp5_state;
struct mdp5_hw_pipe_state *hwpstate;
struct mdp5_smp_state *state;
int total = 0, i, j;
@@ -346,11 +347,12 @@ void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p)
drm_printf(p, "----\t-----\t-----\n");

if (drm_can_sleep())
- drm_modeset_lock(&mdp5_kms->state_lock, NULL);
+ drm_modeset_lock_all(mdp5_kms->dev);

- /* grab these *after* we hold the state_lock */
- hwpstate = &mdp5_kms->state->hwpipe;
- state = &mdp5_kms->state->smp;
+ /* grab these *after* we hold the modeset_lock */
+ mdp5_state = mdp5_state_from_dev(mdp5_kms->dev);
+ hwpstate = &mdp5_state->hwpipe;
+ state = &mdp5_state->smp;

for (i = 0; i < mdp5_kms->num_hwpipes; i++) {
struct mdp5_hw_pipe *hwpipe = mdp5_kms->hwpipes[i];
@@ -374,7 +376,7 @@ void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p)
bitmap_weight(state->state, smp->blk_cnt));

if (drm_can_sleep())
- drm_modeset_unlock(&mdp5_kms->state_lock);
+ drm_modeset_unlock_all(mdp5_kms->dev);
}

void mdp5_smp_destroy(struct mdp5_smp *smp)
@@ -382,12 +384,15 @@ void mdp5_smp_destroy(struct mdp5_smp *smp)
kfree(smp);
}

-struct mdp5_smp *mdp5_smp_init(struct mdp5_kms *mdp5_kms, const struct mdp5_smp_block *cfg)
+struct mdp5_smp *mdp5_smp_init(struct mdp5_kms *mdp5_kms,
+ const struct mdp5_smp_block *cfg,
+ struct mdp5_state *mdp5_state)
{
- struct mdp5_smp_state *state = &mdp5_kms->state->smp;
+ struct mdp5_smp_state *state;
struct mdp5_smp *smp = NULL;
int ret;

+ state = &mdp5_state->smp;
smp = kzalloc(sizeof(*smp), GFP_KERNEL);
if (unlikely(!smp)) {
ret = -ENOMEM;
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.h b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.h
index b41d0448fbe8..1bfa22b63a2d 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.h
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.h
@@ -69,6 +69,7 @@ struct mdp5_smp_state {
};

struct mdp5_kms;
+struct mdp5_state;
struct mdp5_smp;

/*
@@ -78,7 +79,8 @@ struct mdp5_smp;
*/

struct mdp5_smp *mdp5_smp_init(struct mdp5_kms *mdp5_kms,
- const struct mdp5_smp_block *cfg);
+ const struct mdp5_smp_block *cfg,
+ struct mdp5_state *mdp5_state);
void mdp5_smp_destroy(struct mdp5_smp *smp);

void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p);
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index bf5f8c39f34d..e792158676aa 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -220,16 +220,6 @@ int msm_atomic_commit(struct drm_device *dev,

BUG_ON(drm_atomic_helper_swap_state(state, false) < 0);

- /*
- * This is the point of no return - everything below never fails except
- * when the hw goes bonghits. Which means we can commit the new state on
- * the software side now.
- *
- * swap driver private state while still holding state_lock
- */
- if (to_kms_state(state)->state)
- priv->kms->funcs->swap_state(priv->kms, state);
-
/*
* Everything below can be run asynchronously without the need to grab
* any modeset locks at all under one conditions: It must be guaranteed
@@ -262,30 +252,3 @@ int msm_atomic_commit(struct drm_device *dev,
drm_atomic_helper_cleanup_planes(dev, state);
return ret;
}
-
-struct drm_atomic_state *msm_atomic_state_alloc(struct drm_device *dev)
-{
- struct msm_kms_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
-
- if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
- kfree(state);
- return NULL;
- }
-
- return &state->base;
-}
-
-void msm_atomic_state_clear(struct drm_atomic_state *s)
-{
- struct msm_kms_state *state = to_kms_state(s);
- drm_atomic_state_default_clear(&state->base);
- kfree(state->state);
- state->state = NULL;
-}
-
-void msm_atomic_state_free(struct drm_atomic_state *state)
-{
- kfree(to_kms_state(state)->state);
- drm_atomic_state_default_release(state);
- kfree(state);
-}
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 30cd514d8f7c..7e8f640062ef 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -42,11 +42,79 @@ static const struct drm_mode_config_funcs mode_config_funcs = {
.output_poll_changed = drm_fb_helper_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = msm_atomic_commit,
- .atomic_state_alloc = msm_atomic_state_alloc,
- .atomic_state_clear = msm_atomic_state_clear,
- .atomic_state_free = msm_atomic_state_free,
};

+static inline
+struct msm_kms *msm_kms_from_obj(struct drm_private_obj *obj)
+{
+ return container_of(obj, struct msm_kms, base);
+}
+
+static inline
+struct msm_kms_state *msm_kms_state_from_priv(struct drm_private_state *priv)
+{
+ return container_of(priv, struct msm_kms_state, base);
+}
+
+
+struct msm_kms_state *msm_kms_state_from_atomic(struct drm_atomic_state *state)
+{
+ struct msm_drm_private *priv = state->dev->dev_private;
+ struct drm_private_obj *obj = &priv->kms->base;
+ struct drm_private_state *priv_state;
+
+ priv_state = drm_atomic_get_private_obj_state(state, obj);
+ if (IS_ERR_OR_NULL(priv_state))
+ return (struct msm_kms_state *)state; /* casting ERR_PTR */
+
+ return msm_kms_state_from_priv(priv_state);
+}
+
+struct msm_kms_state *msm_kms_state_from_dev(struct drm_device *dev)
+{
+ struct msm_drm_private *priv = dev->dev_private;
+ struct drm_private_obj *obj = &priv->kms->base;
+ struct drm_private_state *priv_state = obj->state;
+
+ return msm_kms_state_from_priv(priv_state);
+}
+
+static struct drm_private_state *
+msm_kms_duplicate_state(struct drm_private_obj *obj)
+{
+ struct msm_kms *kms = msm_kms_from_obj(obj);
+ struct msm_kms_state *state = msm_kms_state_from_priv(obj->state);
+ struct msm_kms_state *new_state;
+
+ new_state = kzalloc(sizeof(*new_state), GFP_KERNEL);
+ if (!new_state)
+ return NULL;
+
+ if (kms->funcs->duplicate_state)
+ new_state->state = kms->funcs->duplicate_state(state->state);
+
+ __drm_atomic_helper_private_obj_duplicate_state(obj, &new_state->base);
+
+ return &new_state->base;
+}
+
+static void msm_kms_destroy_state(struct drm_private_obj *obj,
+ struct drm_private_state *priv_state)
+{
+ struct msm_kms *kms = msm_kms_from_obj(obj);
+ struct msm_kms_state *state = msm_kms_state_from_priv(priv_state);
+
+ if (kms->funcs->destroy_state)
+ kms->funcs->destroy_state(state->state);
+ kfree(state);
+}
+
+static const struct drm_private_state_funcs kms_state_funcs = {
+ .atomic_duplicate_state = msm_kms_duplicate_state,
+ .atomic_destroy_state = msm_kms_destroy_state,
+};
+
+
#ifdef CONFIG_DRM_MSM_REGISTER_LOGGING
static bool reglog = false;
MODULE_PARM_DESC(reglog, "Enable register read/write logging");
@@ -245,6 +313,8 @@ static int msm_drm_uninit(struct device *dev)
flush_workqueue(priv->atomic_wq);
destroy_workqueue(priv->atomic_wq);

+ drm_atomic_private_obj_fini(&kms->base);
+
if (kms && kms->funcs)
kms->funcs->destroy(kms);

@@ -356,6 +426,7 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
struct drm_device *ddev;
struct msm_drm_private *priv;
struct msm_kms *kms;
+ struct msm_kms_state *initial_state;
int ret;

ddev = drm_dev_alloc(drv, dev);
@@ -364,6 +435,10 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
return PTR_ERR(ddev);
}

+ initial_state = kzalloc(sizeof(*initial_state), GFP_KERNEL);
+ if (!initial_state)
+ return -ENOMEM;
+
platform_set_drvdata(pdev, ddev);

priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -394,7 +469,7 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
drm_mode_config_init(ddev);

/* Bind all our sub-components: */
- ret = component_bind_all(dev, ddev);
+ ret = component_bind_all(dev, initial_state);
if (ret) {
msm_mdss_destroy(ddev);
kfree(priv);
@@ -433,6 +508,10 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
goto fail;
}

+ drm_atomic_private_obj_init(&kms->base,
+ &initial_state->base,
+ &kms_state_funcs);
+
if (kms) {
ret = kms->funcs->hw_init(kms);
if (ret) {
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 48ed5b9a8580..c5b8c989b859 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -162,9 +162,6 @@ struct msm_format {

int msm_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state, bool nonblock);
-struct drm_atomic_state *msm_atomic_state_alloc(struct drm_device *dev);
-void msm_atomic_state_clear(struct drm_atomic_state *state);
-void msm_atomic_state_free(struct drm_atomic_state *state);

void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma, struct sg_table *sgt);
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index 17d5824417ad..24d09fcebf16 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -42,6 +42,8 @@ struct msm_kms_funcs {
void (*disable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
/* swap global atomic state: */
void (*swap_state)(struct msm_kms *kms, struct drm_atomic_state *state);
+ void *(*duplicate_state)(void *state);
+ void (*destroy_state)(void *state);
/* modeset, bracketing atomic_commit(): */
void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
void (*complete_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
@@ -68,6 +70,8 @@ struct msm_kms_funcs {
};

struct msm_kms {
+ struct drm_private_obj base;
+
const struct msm_kms_funcs *funcs;

/* irq number to be passed on to drm_irq_install */
@@ -78,16 +82,23 @@ struct msm_kms {
};

/**
- * Subclass of drm_atomic_state, to allow kms backend to have driver
+ * Subclass of drm_private_state, to allow kms backend to have driver
* private global state. The kms backend can do whatever it wants
- * with the ->state ptr. On ->atomic_state_clear() the ->state ptr
- * is kfree'd and set back to NULL.
+ * with the ->state ptr.
*/
struct msm_kms_state {
- struct drm_atomic_state base;
+ struct drm_private_state base;
void *state;
};
-#define to_kms_state(x) container_of(x, struct msm_kms_state, base)
+
+/**
+ * Extracts the msm_kms_state from either an atomic state, or the current
+ * device. One or the other might be desirable depending on whether you want the
+ * currently configured msm_kms_state (from_dev), or you would like the state
+ * which is about to be applied (from_atomic).
+ */
+struct msm_kms_state *msm_kms_state_from_dev(struct drm_device *dev);
+struct msm_kms_state *msm_kms_state_from_atomic(struct drm_atomic_state *state);

static inline void msm_kms_init(struct msm_kms *kms,
const struct msm_kms_funcs *funcs)
--
Sean Paul, Software Engineer, Google / Chromium OS