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drm/msm/disp: Export helper for capturing snapshot 

We'll re-use this for debugfs.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211215174524.1742389-3-robdclark@gmail.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2021-12-15 09:45:07 -08:00
parent 857548cbcf
commit 59871211c6
2 changed files with 30 additions and 7 deletions
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27
drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
View File

@ -28,29 +28,42 @@ static ssize_t __maybe_unused disp_devcoredump_read(char *buffer, loff_t offset,
return count - iter.remain;
}
static void _msm_disp_snapshot_work(struct kthread_work *work)
struct msm_disp_state *
msm_disp_snapshot_state_sync(struct msm_kms *kms)
{
struct msm_kms *kms = container_of(work, struct msm_kms, dump_work);
struct drm_device *drm_dev = kms->dev;
struct msm_disp_state *disp_state;
struct drm_printer p;
WARN_ON(!mutex_is_locked(&kms->dump_mutex));
disp_state = kzalloc(sizeof(struct msm_disp_state), GFP_KERNEL);
if (!disp_state)
return;
return ERR_PTR(-ENOMEM);
disp_state->dev = drm_dev->dev;
disp_state->drm_dev = drm_dev;
INIT_LIST_HEAD(&disp_state->blocks);
/* Serialize dumping here */
mutex_lock(&kms->dump_mutex);
msm_disp_snapshot_capture_state(disp_state);
return disp_state;
}
static void _msm_disp_snapshot_work(struct kthread_work *work)
{
struct msm_kms *kms = container_of(work, struct msm_kms, dump_work);
struct msm_disp_state *disp_state;
struct drm_printer p;
/* Serialize dumping here */
mutex_lock(&kms->dump_mutex);
disp_state = msm_disp_snapshot_state_sync(kms);
mutex_unlock(&kms->dump_mutex);
if (IS_ERR(disp_state))
return;
if (MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE) {
p = drm_info_printer(disp_state->drm_dev->dev);
msm_disp_state_print(disp_state, &p);

10
drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
View File

@ -84,6 +84,16 @@ int msm_disp_snapshot_init(struct drm_device *drm_dev);
*/
void msm_disp_snapshot_destroy(struct drm_device *drm_dev);
/**
* msm_disp_snapshot_state_sync - synchronously snapshot display state
* @kms: the kms object
*
* Returns state or error
*
* Must be called with &kms->dump_mutex held
*/
struct msm_disp_state *msm_disp_snapshot_state_sync(struct msm_kms *kms);
/**
* msm_disp_snapshot_state - trigger to dump the display snapshot
* @drm_dev: handle to drm device