[4/9] drm/i915: Use EAGAIN instead EBUSY for aux retry.

Submitted by Rodrigo Vivi on Nov. 26, 2015, 12:04 a.m.

Details

Message ID 1448496245-1495-5-git-send-email-rodrigo.vivi@intel.com
State New
Headers show
Series "Organize aux retries v3" ( rev: 1 ) in Intel GFX

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Commit Message

Rodrigo Vivi Nov. 26, 2015, 12:04 a.m.
Current EBUSY meaning is immediately retry, but this is
about to change. DRM aux transfer is about to change and
make EAGAIN the immediately retry and use EBUSY to wait
a bit for aux channels to recover for any error or wake up.

This has no functional change if the EAGAIN support is in
place already for drm aux transfer.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 2805f0d..1261d26 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -835,7 +835,7 @@  intel_dp_aux_ch(struct intel_dp *intel_dp,
 			last_status = status;
 		}
 
-		ret = -EBUSY;
+		ret = -EAGAIN;
 		goto out;
 	}
 
@@ -890,7 +890,7 @@  intel_dp_aux_ch(struct intel_dp *intel_dp,
 
 	if ((status & DP_AUX_CH_CTL_DONE) == 0) {
 		DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
-		ret = -EBUSY;
+		ret = -EAGAIN;
 		goto out;
 	}