On 10/21/2015 7:54 PM, Vivi, Rodrigo wrote:
On Wed, 2015-10-21 at 12:19 +0300, Ville Syrjälä wrote:
On Wed, Oct 21, 2015 at 10:28:51AM -0700, Rodrigo Vivi wrote:
EBUSY retries are already in place at drm level.
We don't need to replicate the job here.
Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com>
---
drivers/gpu/drm/i915/intel_dp.c | 20 ++------------------
1 file changed, 2 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c
b/drivers/gpu/drm/i915/intel_dp.c
index 09bdd94..d054129 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -818,24 +818,8 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
intel_aux_display_runtime_get(dev_priv);
- /* Try to wait for any previous AUX channel activity */
- for (try = 0; try < 3; try++) {
- status = I915_READ_NOTRACE(ch_ctl);
- if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
- break;
- msleep(1);
The dp helper doesn't sleep at all between the retries, so dropping
the
sleep from here may change the behaviour.
hm indeed... what about
+ msleep(1);
+ ret = -EBUSY
+ goto out;
?
the current code is one of few test cases that pass during compliance
testing
so please confirm this change does not break that :).
regards,
Sivakumar
- }
-
- if (try == 3) {
- static u32 last_status = -1;
- const u32 status = I915_READ(ch_ctl);
-
- if (status != last_status) {
- WARN(1, "dp_aux_ch not started status
0x%08x\n",
- status);
- last_status = status;
- }
-
+ status = I915_READ_NOTRACE(ch_ctl);
+ if ((status & DP_AUX_CH_CTL_SEND_BUSY) != 0) {
ret = -EBUSY;
goto out;
}
--
2.4.3
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