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drm/msm/gpu: Capture the GPU state on a GPU hang

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Capture the GPU state on a GPU hang and store it for later playback
via the devcoredump facility. Only one crash state is stored at a
time on the assumption that the first hang is usually the most
interesting. The existing crash state can be cleared after capturing
it and then a new one will be captured on the next hang.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Jordan Crouse
2018-07-24 10:33:27 -06:00
committed by Rob Clark
parent 65a3c2748e
commit c0fec7f562
9 changed files with 154 additions and 23 deletions
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5
drivers/gpu/drm/msm/msm_debugfs.c
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@ -29,6 +29,7 @@ struct msm_gpu_show_priv {
static int msm_gpu_show(struct seq_file *m, void *arg)
{
struct drm_printer p = drm_seq_file_printer(m);
struct msm_gpu_show_priv *show_priv = m->private;
struct msm_drm_private *priv = show_priv->dev->dev_private;
struct msm_gpu *gpu = priv->gpu;
@ -38,8 +39,8 @@ static int msm_gpu_show(struct seq_file *m, void *arg)
if (ret)
return ret;
seq_printf(m, "%s Status:\n", gpu->name);
gpu->funcs->show(gpu, show_priv->state, m);
drm_printf(&p, "%s Status:\n", gpu->name);
gpu->funcs->show(gpu, show_priv->state, &p);
mutex_unlock(&show_priv->dev->struct_mutex);