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drm/msm: subclass drm_atomic_state

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This will give the kms backends a slot to stash their own hw specific
global state.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2016-11-04 13:51:42 -04:00
parent c056b55dc6
commit 870d738acb
4 changed files with 51 additions and 0 deletions
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31
drivers/gpu/drm/msm/msm_atomic.c
View File

@ -241,6 +241,10 @@ int msm_atomic_commit(struct drm_device *dev,
drm_atomic_helper_swap_state(state, true);
/* 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
@ -271,3 +275,30 @@ error:
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);
}

3
drivers/gpu/drm/msm/msm_drv.c
View File

@ -46,6 +46,9 @@ static const struct drm_mode_config_funcs mode_config_funcs = {
.output_poll_changed = msm_fb_output_poll_changed,
.atomic_check = msm_atomic_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,
};
int msm_register_address_space(struct drm_device *dev,

3
drivers/gpu/drm/msm/msm_drv.h
View File

@ -179,6 +179,9 @@ int msm_atomic_check(struct drm_device *dev,
struct drm_atomic_state *state);
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);
int msm_register_address_space(struct drm_device *dev,
struct msm_gem_address_space *aspace);

14
drivers/gpu/drm/msm/msm_kms.h
View File

@ -40,6 +40,8 @@ struct msm_kms_funcs {
irqreturn_t (*irq)(struct msm_kms *kms);
int (*enable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
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);
/* 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);
@ -65,6 +67,18 @@ struct msm_kms {
int irq;
};
/**
* 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)
{