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drm/i915: Fix channel ending action for DP aux transaction

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We should use current channel 'status' bits to clear DP aux channel's
done and error bits, instead of using the channel setting bits, that
will set send/busy bit again to initiate new transaction.

This also includes also some minor cleanup.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2009-07-24 01:00:30 +08:00 committed by Eric Anholt
parent 249c0e64c2
commit eebc863e46
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/i915/intel_dp.c
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@ -236,7 +236,7 @@ intel_dp_aux_ch(struct intel_output *intel_output,
}
/* Clear done status and any errors */
I915_WRITE(ch_ctl, (ctl |
I915_WRITE(ch_ctl, (status |
DP_AUX_CH_CTL_DONE |
DP_AUX_CH_CTL_TIME_OUT_ERROR |
DP_AUX_CH_CTL_RECEIVE_ERROR));
@ -295,7 +295,7 @@ intel_dp_aux_native_write(struct intel_output *intel_output,
return -1;
msg[0] = AUX_NATIVE_WRITE << 4;
msg[1] = address >> 8;
msg[2] = address;
msg[2] = address & 0xff;
msg[3] = send_bytes - 1;
memcpy(&msg[4], send, send_bytes);
msg_bytes = send_bytes + 4;
@ -387,8 +387,8 @@ intel_dp_i2c_init(struct intel_output *intel_output, const char *name)
memset(&dp_priv->adapter, '\0', sizeof (dp_priv->adapter));
dp_priv->adapter.owner = THIS_MODULE;
dp_priv->adapter.class = I2C_CLASS_DDC;
strncpy (dp_priv->adapter.name, name, sizeof dp_priv->adapter.name - 1);
dp_priv->adapter.name[sizeof dp_priv->adapter.name - 1] = '\0';
strncpy (dp_priv->adapter.name, name, sizeof(dp_priv->adapter.name) - 1);
dp_priv->adapter.name[sizeof(dp_priv->adapter.name) - 1] = '\0';
dp_priv->adapter.algo_data = &dp_priv->algo;
dp_priv->adapter.dev.parent = &intel_output->base.kdev;