leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/i915: use _NOTRACE for gmbus/dp aux wait loops

Browse Source 
Less clutter in the traces. And in both cases we yell rather loud
into the logs if we time out. Patch suggested by Chris Wilson.

v2: Annotate another I915_READ in dp_aux to be consistent - we filter
out all register io in wait_for and similar loops. Chris also
suggested to mark all dp_aux register access as _NOTRACE, but I think
we should keep all functionally relevant access around, and filter
unneeded bits in userspace after the trace is captured.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-12-01 21:03:59 +01:00
parent 9ee32fea5f
commit ef04f00d12
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/i915/intel_dp.c
View File

@ -351,7 +351,7 @@ intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq)
}
}
#define C (((status = I915_READ(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
#define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
if (has_aux_irq)
done = wait_event_timeout(dev_priv->gmbus_wait_queue, C, 10);
else
@ -439,7 +439,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
/* Try to wait for any previous AUX channel activity */
for (try = 0; try < 3; try++) {
status = I915_READ(ch_ctl);
status = I915_READ_NOTRACE(ch_ctl);
if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
break;
msleep(1);

4
drivers/gpu/drm/i915/intel_i2c.c
View File

@ -223,7 +223,7 @@ gmbus_wait_hw_status(struct drm_i915_private *dev_priv,
prepare_to_wait(&dev_priv->gmbus_wait_queue, &wait,
TASK_UNINTERRUPTIBLE);
gmbus2 = I915_READ(GMBUS2 + reg_offset);
gmbus2 = I915_READ_NOTRACE(GMBUS2 + reg_offset);
if (gmbus2 & (GMBUS_SATOER | gmbus2_status))
break;
@ -246,7 +246,7 @@ gmbus_wait_idle(struct drm_i915_private *dev_priv)
int ret;
int reg_offset = dev_priv->gpio_mmio_base;
#define C ((I915_READ(GMBUS2 + reg_offset) & GMBUS_ACTIVE) == 0)
#define C ((I915_READ_NOTRACE(GMBUS2 + reg_offset) & GMBUS_ACTIVE) == 0)
if (!HAS_GMBUS_IRQ(dev_priv->dev))
return wait_for(C, 10);