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.
> - }
> -
> - 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
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel OTC
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