From c1e74122fb029d30b66d9364122aef50265354aa Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 27 Aug 2015 17:23:27 +0300 Subject: [PATCH] drm/i915: Handle DP_AUX_I2C_WRITE_STATUS_UPDATE MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit When we get an i2c defer or short ack for i2c-over-aux write we need to switch to WRITE_STATUS_UPDATE to poll for the completion of the original request. i915 doesn't try to interpret wht request type apart from separating reads from writes, and so we should be able to treat this the same as a normal i2c write. Reviewed-by: Jani Nikula Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 0a2e33fbf20d..7bb96d5850de 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -974,6 +974,7 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) switch (msg->request & ~DP_AUX_I2C_MOT) { case DP_AUX_NATIVE_WRITE: case DP_AUX_I2C_WRITE: + case DP_AUX_I2C_WRITE_STATUS_UPDATE: txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE; rxsize = 2; /* 0 or 1 data bytes */ -- 2.20.1