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author | Noralf Trønnes <noralf@tronnes.org> | 2020-05-09 16:16:13 +0200 |
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committer | Noralf Trønnes <noralf@tronnes.org> | 2020-05-26 13:32:03 +0200 |
commit | 64593f2a6fc933bb9a410bc3f8c261f3e57a9601 (patch) | |
tree | 746ea9e405b2387c85b27c33cd53b7be8ffb5d46 /drivers/gpu/drm/drm_client_modeset.c | |
parent | c9c03e3cf07299bf635e6fadad8d09106d26252f (diff) | |
download | linux-64593f2a6fc933bb9a410bc3f8c261f3e57a9601.tar.gz linux-64593f2a6fc933bb9a410bc3f8c261f3e57a9601.tar.bz2 linux-64593f2a6fc933bb9a410bc3f8c261f3e57a9601.zip |
drm/client: Add drm_client_modeset_check()
Add a way for client to check the configuration before comitting.
v2:
- Fix docs (Sam)
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200509141619.32970-5-noralf@tronnes.org
Diffstat (limited to 'drivers/gpu/drm/drm_client_modeset.c')
-rw-r--r-- | drivers/gpu/drm/drm_client_modeset.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c index 66e785b738eb..d0778bb159bc 100644 --- a/drivers/gpu/drm/drm_client_modeset.c +++ b/drivers/gpu/drm/drm_client_modeset.c @@ -969,7 +969,7 @@ bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation) } EXPORT_SYMBOL(drm_client_rotation); -static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active) +static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active, bool check) { struct drm_device *dev = client->dev; struct drm_plane *plane; @@ -1036,7 +1036,10 @@ retry: } } - ret = drm_atomic_commit(state); + if (check) + ret = drm_atomic_check_only(state); + else + ret = drm_atomic_commit(state); out_state: if (ret == -EDEADLK) @@ -1098,6 +1101,30 @@ out: } /** + * drm_client_modeset_check() - Check modeset configuration + * @client: DRM client + * + * Check modeset configuration. + * + * Returns: + * Zero on success or negative error code on failure. + */ +int drm_client_modeset_check(struct drm_client_dev *client) +{ + int ret; + + if (!drm_drv_uses_atomic_modeset(client->dev)) + return 0; + + mutex_lock(&client->modeset_mutex); + ret = drm_client_modeset_commit_atomic(client, true, true); + mutex_unlock(&client->modeset_mutex); + + return ret; +} +EXPORT_SYMBOL(drm_client_modeset_check); + +/** * drm_client_modeset_commit_locked() - Force commit CRTC configuration * @client: DRM client * @@ -1115,7 +1142,7 @@ int drm_client_modeset_commit_locked(struct drm_client_dev *client) mutex_lock(&client->modeset_mutex); if (drm_drv_uses_atomic_modeset(dev)) - ret = drm_client_modeset_commit_atomic(client, true); + ret = drm_client_modeset_commit_atomic(client, true, false); else ret = drm_client_modeset_commit_legacy(client); mutex_unlock(&client->modeset_mutex); @@ -1191,7 +1218,7 @@ int drm_client_modeset_dpms(struct drm_client_dev *client, int mode) mutex_lock(&client->modeset_mutex); if (drm_drv_uses_atomic_modeset(dev)) - ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON); + ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON, false); else drm_client_modeset_dpms_legacy(client, mode); mutex_unlock(&client->modeset_mutex); |