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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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6
drivers/gpu/drm/vc4/vc4_drv.h
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@@ -91,6 +91,11 @@ struct vc4_dev {
struct vc4_bo *overflow_mem;
struct work_struct overflow_mem_work;
int power_refcount;
/* Mutex controlling the power refcount. */
struct mutex power_lock;
struct {
struct timer_list timer;
struct work_struct reset_work;
@@ -439,7 +444,6 @@ void vc4_plane_async_set_fb(struct drm_plane *plane,
extern struct platform_driver vc4_v3d_driver;
int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused);
int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused);
int vc4_v3d_set_power(struct vc4_dev *vc4, bool on);
/* vc4_validate.c */
int