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drm/exynos: update crtc to plane safely

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if old_crtc isn't same as encoder->crtc then it means that
user changed crtc id to another one so a plane to old_crtc
should be disabled so that current plane can be updated safely
and plane->crtc should be set to new crtc(encoder->crtc)

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Inki Dae 2012-08-17 17:58:38 +09:00
parent 01ed812671
commit 1b85a0715f
1 changed files with 56 additions and 3 deletions
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59
drivers/gpu/drm/exynos/exynos_drm_encoder.c
View file

@ -45,6 +45,7 @@
* @dpms: store the encoder dpms value.
*/
struct exynos_drm_encoder {
struct drm_crtc *old_crtc;
struct drm_encoder drm_encoder;
struct exynos_drm_manager *manager;
int dpms;
@ -124,22 +125,74 @@ exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
return true;
}
static void disable_plane_to_crtc(struct drm_device *dev,
struct drm_crtc *old_crtc,
struct drm_crtc *new_crtc)
{
struct drm_plane *plane;
/*
* if old_crtc isn't same as encoder->crtc then it means that
* user changed crtc id to another one so the plane to old_crtc
* should be disabled and plane->crtc should be set to new_crtc
* (encoder->crtc)
*/
list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
if (plane->crtc == old_crtc) {
/*
* do not change below call order.
*
* plane->funcs->disable_plane call checks
* if encoder->crtc is same as plane->crtc and if same
* then overlay_ops->disable callback will be called
* to diasble current hw overlay so plane->crtc should
* have new_crtc because new_crtc was set to
* encoder->crtc in advance.
*/
plane->crtc = new_crtc;
plane->funcs->disable_plane(plane);
}
}
}
static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = encoder->dev;
struct drm_connector *connector;
struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
struct exynos_drm_manager_ops *manager_ops = manager->ops;
struct exynos_drm_manager *manager;
struct exynos_drm_manager_ops *manager_ops;
DRM_DEBUG_KMS("%s\n", __FILE__);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->encoder == encoder)
if (connector->encoder == encoder) {
struct exynos_drm_encoder *exynos_encoder;
exynos_encoder = to_exynos_encoder(encoder);
if (exynos_encoder->old_crtc != encoder->crtc &&
exynos_encoder->old_crtc) {
/*
* disable a plane to old crtc and change
* crtc of the plane to new one.
*/
disable_plane_to_crtc(dev,
exynos_encoder->old_crtc,
encoder->crtc);
}
manager = exynos_drm_get_manager(encoder);
manager_ops = manager->ops;
if (manager_ops && manager_ops->mode_set)
manager_ops->mode_set(manager->dev,
adjusted_mode);
exynos_encoder->old_crtc = encoder->crtc;
}
}
}