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drm/vc4: Use runtime PM to power cycle the device when the GPU hangs.

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This gets us functional GPU reset again, like we had until a refactor
at merge time.  Tested with a little patch to stuff in a broken binner
job every 100 frames.

Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt
2016-02-08 12:59:02 -08:00
parent 001bdb55d9
commit 36cb6253f9
3 changed files with 26 additions and 18 deletions
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12
drivers/gpu/drm/vc4/vc4_v3d.c
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@@ -145,18 +145,6 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
}
#endif /* CONFIG_DEBUG_FS */
int
vc4_v3d_set_power(struct vc4_dev *vc4, bool on)
{
/* XXX: This interface is needed for GPU reset, and the way to
* do it is to turn our power domain off and back on. We
* can't just reset from within the driver, because the reset
* bits are in the power domain's register area, and get set
* during the poweron process.
*/
return 0;
}
static void vc4_v3d_init_hw(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);