Commit 59871211 authored by Rob Clark's avatar Rob Clark
Browse files

drm/msm/disp: Export helper for capturing snapshot 



We'll re-use this for debugfs.

Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211215174524.1742389-3-robdclark@gmail.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent 857548cb

drivers/gpu/drm/msm/disp/msm_disp_snapshot.c

+20 −7
Original line number Diff line number Diff line
@@ -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);

drivers/gpu/drm/msm/disp/msm_disp_snapshot.h

+10 −0
Original line number Diff line number Diff line
@@ -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