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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2021-07-01 19:36:17 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2021-07-02 21:48:06 +0200 |
| commit | 27e4b467d94e216b365da388358c9407af818662 (patch) | |
| tree | 4f99158e5dc8bc4a1117f1d775bb2497daa9622a /drivers/gpu | |
| parent | 32334c9b1fd78ad661582c55b15d263a5d6d157d (diff) | |
| download | linux-27e4b467d94e216b365da388358c9407af818662.tar.gz linux-27e4b467d94e216b365da388358c9407af818662.tar.bz2 linux-27e4b467d94e216b365da388358c9407af818662.zip | |
drm/i915: Use the correct IRQ during resume
The code in xcs_resume() probably didn't work as intended. It uses
struct drm_device.irq, which is allocated to 0, but never initialized
by i915 to the device's interrupt number.
Change all calls to synchronize_hardirq() to intel_synchronize_irq(),
which uses the correct interrupt. _hardirq() functions are not needed
in this context.
v5:
* go back to _hardirq() after PCI probe reported wrong
context; add rsp comment
v4:
* switch everything to intel_synchronize_irq() (Daniel)
v3:
* also use intel_synchronize_hardirq() at another callsite
v2:
* wrap irq code in intel_synchronize_hardirq() (Ville)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 536f77b1caa0 ("drm/i915/gt: Call stop_ring() from ring resume, again")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210701173618.10718-2-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_cs.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_ring_submission.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.h | 1 |
4 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index 88694822716a..5ca3d1664335 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -1229,7 +1229,7 @@ bool intel_engine_is_idle(struct intel_engine_cs *engine) return true; /* Waiting to drain ELSP? */ - synchronize_hardirq(to_pci_dev(engine->i915->drm.dev)->irq); + intel_synchronize_hardirq(engine->i915); intel_engine_flush_submission(engine); /* ELSP is empty, but there are ready requests? E.g. after reset */ diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c index 5d42a12ef3d6..5c4d204d07cc 100644 --- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c @@ -184,8 +184,11 @@ static int xcs_resume(struct intel_engine_cs *engine) ENGINE_TRACE(engine, "ring:{HEAD:%04x, TAIL:%04x}\n", ring->head, ring->tail); - /* Double check the ring is empty & disabled before we resume */ - synchronize_hardirq(engine->i915->drm.irq); + /* + * Double check the ring is empty & disabled before we resume. Called + * from atomic context during PCI probe, so _hardirq(). + */ + intel_synchronize_hardirq(engine->i915); if (!stop_ring(engine)) goto err; diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index a11bdb667241..7d13d2147054 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -4575,3 +4575,8 @@ void intel_synchronize_irq(struct drm_i915_private *i915) { synchronize_irq(to_pci_dev(i915->drm.dev)->irq); } + +void intel_synchronize_hardirq(struct drm_i915_private *i915) +{ + synchronize_hardirq(to_pci_dev(i915->drm.dev)->irq); +} diff --git a/drivers/gpu/drm/i915/i915_irq.h b/drivers/gpu/drm/i915/i915_irq.h index db34d5dbe402..e43b6734f21b 100644 --- a/drivers/gpu/drm/i915/i915_irq.h +++ b/drivers/gpu/drm/i915/i915_irq.h @@ -94,6 +94,7 @@ void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv); void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv); bool intel_irqs_enabled(struct drm_i915_private *dev_priv); void intel_synchronize_irq(struct drm_i915_private *i915); +void intel_synchronize_hardirq(struct drm_i915_private *i915); int intel_get_crtc_scanline(struct intel_crtc *crtc); void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv, |