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drm/i915/debugfs: Take runtime_pm ref for sseu 

When reading the SSEU statistics, we need to call
intel_runtime_pm_get() first, otherwise we might end up
triggering "Device suspended during HW access".

Signed-off-by: David Weinehall <david.weinehall@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470062007-26996-1-git-send-email-david.weinehall@linux.intel.com
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
David Weinehall 2016-08-01 17:33:27 +03:00 committed by Chris Wilson
parent 6ce213575c
commit 238010ed6c
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/i915/i915_debugfs.c
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@ -5238,7 +5238,8 @@ static void broadwell_sseu_device_status(struct drm_device *dev,
static int i915_sseu_status(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
struct drm_i915_private *dev_priv = to_i915(node->minor->dev);
struct drm_device *dev = &dev_priv->drm;
struct sseu_dev_status stat;
if (INTEL_INFO(dev)->gen < 8)
@ -5268,6 +5269,9 @@ static int i915_sseu_status(struct seq_file *m, void *unused)
seq_puts(m, "SSEU Device Status\n");
memset(&stat, 0, sizeof(stat));
intel_runtime_pm_get(dev_priv);
if (IS_CHERRYVIEW(dev)) {
cherryview_sseu_device_status(dev, &stat);
} else if (IS_BROADWELL(dev)) {
@ -5275,6 +5279,9 @@ static int i915_sseu_status(struct seq_file *m, void *unused)
} else if (INTEL_INFO(dev)->gen >= 9) {
gen9_sseu_device_status(dev, &stat);
}
intel_runtime_pm_put(dev_priv);
seq_printf(m, " Enabled Slice Total: %u\n",
stat.slice_total);
seq_printf(m, " Enabled Subslice Total: %u\n",