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drm/atomic: Create __drm_atomic_helper_crtc_reset() for subclassing crtc_state. 

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@linux.intel.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190301125627.7285-3-maarten.lankhorst@linux.intel.com
This commit is contained in:
Maarten Lankhorst 2019-03-01 13:56:12 +01:00
parent 9158e3c311
commit 7d26097b4b
3 changed files with 33 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/gpu/drm/drm_atomic_state_helper.c
View File

@ -56,6 +56,29 @@
* 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
@ -65,14 +88,13 @@
*/
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);

13
drivers/gpu/drm/nouveau/dispnv50/head.c
View File

@ -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);
}

2
include/drm/drm_atomic_state_helper.h
View File

@ -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);