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drm/i915/dp: increase native aux defer retry timeout

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Give more slack to sink devices before retrying on native aux
defer. AFAICT the 100 us timeout was not based on the DP spec.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org (on Jani's request)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2014-02-11 11:52:04 +02:00 • committed by Daniel Vetter
commit 04eada25d1
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/intel_dp.c
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@ -556,7 +556,7 @@ intel_dp_aux_native_write(struct intel_dp *intel_dp,
if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK)
break;
else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
udelay(100);
usleep_range(400, 500);
else
return -EIO;
}
@ -608,7 +608,7 @@ intel_dp_aux_native_read(struct intel_dp *intel_dp,
return ret - 1;
}
else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
udelay(100);
usleep_range(400, 500);
else
return -EIO;
}