[PATCH 09/26] drm: Consolidate plane arrays in drm_atomic_state

Daniel Vetter
2016-05-29T18:35:39Z

It's kinda pointless to have 2 separate mallocs for these. And when we
add more per-plane state in the future it's even more pointless.

Right now there's no such thing planned, but both Gustavo's per-crtc
fence patches, and some nonblocking commit helpers I'm playing around
with will add more per-crtc stuff. It makes sense to also consolidate
planes, just for consistency.

In the future we can use this to store a pointer to the preceeding
state, making an atomic update entirely free-standing. This will be
needed to be able to queue them up with a depth > 1.

Cc: Gustavo Padovan <gustavo@padovan.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
drivers/gpu/drm/drm_atomic.c | 17 ++++++-----------
drivers/gpu/drm/drm_atomic_helper.c | 2 +-
drivers/gpu/drm/i915/intel_atomic.c | 2 +-
include/drm/drm_atomic.h | 14 +++++++-------
include/drm/drm_crtc.h | 11 +++++++----
5 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index a6395e9654af..68fd99d2fd01 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -47,7 +47,6 @@ void drm_atomic_state_default_release(struct drm_atomic_state *state)
kfree(state->crtcs);
kfree(state->crtc_states);
kfree(state->planes);
- kfree(state->plane_states);
}
EXPORT_SYMBOL(drm_atomic_state_default_release);

@@ -79,10 +78,6 @@ drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
sizeof(*state->planes), GFP_KERNEL);
if (!state->planes)
goto fail;
- state->plane_states = kcalloc(dev->mode_config.num_total_plane,
- sizeof(*state->plane_states), GFP_KERNEL);
- if (!state->plane_states)
- goto fail;

state->dev = dev;

@@ -163,15 +158,15 @@ void drm_atomic_state_default_clear(struct drm_atomic_state *state)
}

for (i = 0; i < config->num_total_plane; i++) {
- struct drm_plane *plane = state->planes[i];
+ struct drm_plane *plane = state->planes[i].ptr;

if (!plane)
continue;

plane->funcs->atomic_destroy_state(plane,
- state->plane_states[i]);
- state->planes[i] = NULL;
- state->plane_states[i] = NULL;
+ state->planes[i].state);
+ state->planes[i].ptr = NULL;
+ state->planes[i].state = NULL;
}
}
EXPORT_SYMBOL(drm_atomic_state_default_clear);
@@ -630,8 +625,8 @@ drm_atomic_get_plane_state(struct drm_atomic_state *state,
if (!plane_state)
return ERR_PTR(-ENOMEM);

- state->plane_states[index] = plane_state;
- state->planes[index] = plane;
+ state->planes[index].state = plane_state;
+ state->planes[index].ptr = plane;
plane_state->state = state;

DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 0fb4868fdad6..f70d576f745e 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1579,7 +1579,7 @@ void drm_atomic_helper_swap_state(struct drm_device *dev,

for_each_plane_in_state(state, plane, plane_state, i) {
plane->state->state = state;
- swap(state->plane_states[i], plane->state);
+ swap(state->planes[i].state, plane->state);
plane->state->state = NULL;
}
}
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 3e6d9ff8840a..7542f5f5db1d 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -191,7 +191,7 @@ int intel_atomic_setup_scalers(struct drm_device *dev,

/* plane scaler case: assign as a plane scaler */
/* find the plane that set the bit as scaler_user */
- plane = drm_state->planes[i];
+ plane = drm_state->planes[i].ptr;

/*
* to enable/disable hq mode, add planes that are using scaler
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 37478adb6a16..8e616d39353b 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -86,7 +86,7 @@ static inline struct drm_plane_state *
drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
struct drm_plane *plane)
{
- return state->plane_states[drm_plane_index(plane)];
+ return state->planes[drm_plane_index(plane)].state;
}

/**
@@ -139,8 +139,8 @@ static inline const struct drm_plane_state *
__drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
struct drm_plane *plane)
{
- if (state->plane_states[drm_plane_index(plane)])
- return state->plane_states[drm_plane_index(plane)];
+ if (state->planes[drm_plane_index(plane)].state)
+ return state->planes[drm_plane_index(plane)].state;

return plane->state;
}
@@ -191,11 +191,11 @@ int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
(__i)++) \
for_each_if (crtc_state)

-#define for_each_plane_in_state(state, plane, plane_state, __i) \
+#define for_each_plane_in_state(__state, plane, plane_state, __i) \
for ((__i) = 0; \
- (__i) < (state)->dev->mode_config.num_total_plane && \
- ((plane) = (state)->planes[__i], \
- (plane_state) = (state)->plane_states[__i], 1); \
+ (__i) < (__state)->dev->mode_config.num_total_plane && \
+ ((plane) = (__state)->planes[__i].ptr, \
+ (plane_state) = (__state)->planes[__i].state, 1); \
(__i)++) \
for_each_if (plane_state)
static inline bool
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index d4c46bfe4142..c7c2b3fa7179 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1694,6 +1694,11 @@ struct drm_bridge {
void *driver_private;
};

+struct __drm_planes_state {
+ struct drm_plane *ptr;
+ struct drm_plane_state *state;
+};
+
struct __drm_connnectors_state {
struct drm_connector *ptr;
struct drm_connector_state *state;
@@ -1705,8 +1710,7 @@ struct __drm_connnectors_state {
* @allow_modeset: allow full modeset
* @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
* @legacy_set_config: Disable conflicting encoders instead of failing with -EINVAL.
- * @planes: pointer to array of plane pointers
- * @plane_states: pointer to array of plane states pointers
+ * @planes: pointer to array of structures with per-plane data
* @crtcs: pointer to array of CRTC pointers
* @crtc_states: pointer to array of CRTC states pointers
* @num_connector: size of the @connectors and @connector_states arrays
@@ -1718,8 +1722,7 @@ struct drm_atomic_state {
bool allow_modeset : 1;
bool legacy_cursor_update : 1;
bool legacy_set_config : 1;
- struct drm_plane **planes;
- struct drm_plane_state **plane_states;
+ struct __drm_planes_state *planes;
struct drm_crtc **crtcs;
struct drm_crtc_state **crtc_states;
int num_connector;
--
2.8.1