[Freedreno] [DPU PATCH v3] drm/msm: Use atomic private_obj instead of subclassing
Sean Paul
seanpaul at chromium.org
Mon Mar 19 19:58:53 UTC 2018
Instead of subclassing atomic state, store driver private data in
private_obj/state. This allows us to remove the swap_state driver hook
for mdp5 and get closer to using the atomic helpers entirely.
Changes in v2:
- Use state->state in disp duplicate_state callback (Jeykumar)
Changes in v3:
- Update comment describing msm_kms_state (Jeykumar)
Cc: Jeykumar Sankaran <jsanka at codeaurora.org>
Reviewed-by: Jeykumar Sankaran <jsanka at codeaurora.org>
Signed-off-by: Sean Paul <seanpaul at chromium.org>
---
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 37 ++++++--------
drivers/gpu/drm/msm/msm_atomic.c | 30 -----------
drivers/gpu/drm/msm/msm_drv.c | 65 ++++++++++++++++++++++--
drivers/gpu/drm/msm/msm_drv.h | 4 +-
drivers/gpu/drm/msm/msm_kms.h | 27 +++++-----
5 files changed, 94 insertions(+), 69 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..f1a248419655 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -74,36 +74,32 @@ struct mdp5_state *mdp5_get_state(struct drm_atomic_state *s)
{
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;
+ struct msm_kms_state *kms_state;
int ret;
- if (state->state)
- return state->state;
-
ret = drm_modeset_lock(&mdp5_kms->state_lock, s->acquire_ctx);
if (ret)
return ERR_PTR(ret);
- new_state = kmalloc(sizeof(*mdp5_kms->state), GFP_KERNEL);
- if (!new_state)
- return ERR_PTR(-ENOMEM);
+ kms_state = msm_kms_get_state(s);
+ if (IS_ERR_OR_NULL(kms_state))
+ return (struct mdp5_state *)kms_state; /* casting ERR_PTR */
- /* 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;
+ return kms_state->state;
+}
- state->state = new_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 = state;
+ kfree(mdp_state);
}
static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
@@ -229,7 +225,8 @@ 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 +723,6 @@ 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,
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 7e54eb65d096..1f53262ea46b 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -169,9 +169,6 @@ int msm_atomic_commit(struct drm_device *dev,
*/
BUG_ON(drm_atomic_helper_swap_state(state, false) < 0);
- if (to_kms_state(state)->state)
- priv->kms->funcs->swap_state(priv->kms, state);
-
/*
* Provide the driver a chance to prepare for output fences. This is
* done after the point of no return, but before asynchronous commits
@@ -210,30 +207,3 @@ 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 5219792e93bc..4c0740dc7854 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -121,9 +121,62 @@ static const struct drm_mode_config_funcs mode_config_funcs = {
.output_poll_changed = msm_fb_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 *obj_to_kms(struct drm_private_obj *obj)
+{
+ return container_of(obj, struct msm_kms, base);
+}
+
+static inline
+struct msm_kms_state *state_to_kms_state(struct drm_private_state *state)
+{
+ return container_of(state, struct msm_kms_state, base);
+}
+
+struct msm_kms_state *msm_kms_get_state(struct drm_atomic_state *s)
+{
+ struct msm_drm_private *priv = s->dev->dev_private;
+ struct drm_private_obj *obj = &priv->kms->base;
+ struct drm_private_state *state;
+
+ state = drm_atomic_get_private_obj_state(s, obj);
+ if (IS_ERR_OR_NULL(state))
+ return (struct msm_kms_state *)state; /* casting ERR_PTR */
+
+ return state_to_kms_state(state);
+}
+
+static struct drm_private_state *
+msm_kms_duplicate_state(struct drm_private_obj *obj)
+{
+ struct msm_kms *kms = obj_to_kms(obj);
+ struct msm_kms_state *state = state_to_kms_state(obj->state);
+ struct msm_kms_state *new_state;
+
+ if (kms->funcs->duplicate_state)
+ new_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 *state)
+{
+ struct msm_kms *kms = obj_to_kms(obj);
+ struct msm_kms_state *kms_state = state_to_kms_state(obj->state);
+
+ if (kms->funcs->destroy_state)
+ kms->funcs->destroy_state(kms_state->state);
+ kfree(kms_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
@@ -341,6 +394,8 @@ static int msm_drm_uninit(struct device *dev)
}
}
+ drm_atomic_private_obj_fini(&kms->base);
+
msm_gem_shrinker_cleanup(ddev);
drm_kms_helper_poll_fini(ddev);
@@ -770,6 +825,10 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
}
#endif
+ drm_atomic_private_obj_init(&kms->base,
+ &kms->state.base,
+ &kms_state_funcs);
+
/* perform subdriver post initialization */
if (kms && kms->funcs && kms->funcs->postinit) {
ret = kms->funcs->postinit(kms);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 292496b682e8..8cab333df717 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -598,9 +598,7 @@ 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);
+struct msm_kms_state *msm_kms_get_state(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 09ba1e79db50..5c1bcaf65fd9 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -57,6 +57,8 @@ 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_fence)(struct msm_kms *kms,
struct drm_atomic_state *state);
@@ -114,7 +116,20 @@ struct msm_kms_funcs {
#endif
};
+/**
+ * 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.
+ */
+struct msm_kms_state {
+ struct drm_private_state base;
+ void *state;
+};
+
struct msm_kms {
+ struct drm_private_obj base;
+ struct msm_kms_state state;
+
const struct msm_kms_funcs *funcs;
/* irq number to be passed on to drm_irq_install */
@@ -124,18 +139,6 @@ struct msm_kms {
struct msm_gem_address_space *aspace;
};
-/**
- * Subclass of drm_atomic_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.
- */
-struct msm_kms_state {
- struct drm_atomic_state base;
- void *state;
-};
-#define to_kms_state(x) container_of(x, struct msm_kms_state, base)
-
static inline void msm_kms_init(struct msm_kms *kms,
const struct msm_kms_funcs *funcs)
{
--
Sean Paul, Software Engineer, Google / Chromium OS
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