We already have __drm_atomic_helper_connector_reset() and
__drm_atomic_helper_plane_reset(), extend this to crtc as well.
This will allow us to set default values in the crtc_state, without
having to do it in each driver separately.
Of all drivers that need conversion, only nouveau is done in this
commit, because it wrote its own __drm_atomic_helper_crtc_reset(),
clashing with the drm core.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic_state_helper.c | 34 +++++++++++++++++++----
drivers/gpu/drm/nouveau/dispnv50/head.c | 13 ++-------
include/drm/drm_atomic_state_helper.h | 2 ++
3 files changed, 33 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 4985384e51f6..bc5ee66f75b3 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -55,6 +55,29 @@
* for these functions.
*/
+/**
+ * __drm_atomic_helper_crtc_reset - reset state on CRTC
+ * @crtc: drm CRTC
+ * @crtc_state: CRTC state to assign
+ *
+ * Initializes the newly allocated @crtc_state and assigns it to
+ * the &drm_crtc->state pointer of @crtc, usually required when
+ * initializing the drivers or when called from the &drm_crtc_funcs.reset
+ * hook.
+ *
+ * This is useful for drivers that subclass the CRTC state.
+ */
+void
+__drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
+ struct drm_crtc_state *crtc_state)
+{
+ if (crtc_state)
+ crtc_state->crtc = crtc;
+
+ crtc->state = crtc_state;
+}
+EXPORT_SYMBOL(__drm_atomic_helper_crtc_reset);
+
/**
* drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs
* @crtc: drm CRTC
@@ -64,14 +87,13 @@
*/
void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
{
- if (crtc->state)
- __drm_atomic_helper_crtc_destroy_state(crtc->state);
-
- kfree(crtc->state);
- crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL);
+ struct drm_crtc_state *crtc_state =
+ kzalloc(sizeof(*crtc->state), GFP_KERNEL);
if (crtc->state)
- crtc->state->crtc = crtc;
+ crtc->funcs->atomic_destroy_state(crtc, crtc->state);
+
+ __drm_atomic_helper_crtc_reset(crtc, crtc_state);
}
EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
diff --git a/drivers/gpu/drm/nouveau/dispnv50/head.c b/drivers/gpu/drm/nouveau/dispnv50/head.c
index 2e7a0c347ddb..93754743090f 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/head.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/head.c
@@ -419,16 +419,6 @@ nv50_head_atomic_duplicate_state(struct drm_crtc *crtc)
return &asyh->state;
}
-static void
-__drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
- struct drm_crtc_state *state)
-{
- if (crtc->state)
- crtc->funcs->atomic_destroy_state(crtc, crtc->state);
- crtc->state = state;
- crtc->state->crtc = crtc;
-}
-
static void
nv50_head_reset(struct drm_crtc *crtc)
{
@@ -437,6 +427,9 @@ nv50_head_reset(struct drm_crtc *crtc)
if (WARN_ON(!(asyh = kzalloc(sizeof(*asyh), GFP_KERNEL))))
return;
+ if (crtc->state)
+ nv50_head_atomic_destroy_state(crtc, crtc->state);
+
__drm_atomic_helper_crtc_reset(crtc, &asyh->state);
}
diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
index 66c92cbd8e16..4e6d2e7a40b8 100644
--- a/include/drm/drm_atomic_state_helper.h
+++ b/include/drm/drm_atomic_state_helper.h
@@ -37,6 +37,8 @@ struct drm_private_state;
struct drm_modeset_acquire_ctx;
struct drm_device;
+void __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
+ struct drm_crtc_state *state);
void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
struct drm_crtc_state *state);
--
2.20.1
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