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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Asus U38N: Black screen with Radeon driver in Linux 3.10, 3.11, 3.12, 3.13"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73530#c55">Comment # 55</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Asus U38N: Black screen with Radeon driver in Linux 3.10, 3.11, 3.12, 3.13"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73530">bug 73530</a>
from <span class="vcard"><a class="email" href="mailto:paulepanter@users.sourceforge.net" title="Paul Menzel <paulepanter@users.sourceforge.net>"> <span class="fn">Paul Menzel</span></a>
</span></b>
<pre>Changing the 400 μs to 800 μs and 400 μs did not change anything.
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c
b/drivers/gpu/drm/radeon/atombios_dp.c
index 676ddf8..3e533bb 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -204,7 +204,7 @@ static int radeon_dp_aux_native_read(struct
radeon_connector *radeon_connector,
if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK)
return ret;
else if ((ack & AUX_NATIVE_REPLY_MASK) ==
AUX_NATIVE_REPLY_DEFER)
- udelay(800);
+ udelay(200);
else if (ret == 0)
return -EPROTO;
else
@@ -293,7 +293,7 @@ int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int
mode,
return -EREMOTEIO;
case AUX_NATIVE_REPLY_DEFER:
DRM_DEBUG_KMS("aux_ch native defer\n");
- udelay(800);
+ udelay(200);
continue;
default:
DRM_ERROR("aux_ch invalid native reply 0x%02x\n", ack);
@@ -310,7 +310,7 @@ int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int
mode,
return -EREMOTEIO;
case AUX_I2C_REPLY_DEFER:
DRM_DEBUG_KMS("aux_i2c defer\n");
- udelay(800);
+ udelay(200);
break;
default:
DRM_ERROR("aux_i2c invalid reply 0x%02x\n", ack);
@@ -716,7 +716,7 @@ static int radeon_dp_link_train_init(struct
radeon_dp_link_train_info *dp_info)
static int radeon_dp_link_train_finish(struct radeon_dp_link_train_info
*dp_info)
{
- udelay(800);
+ udelay(200);
/* disable the training pattern on the sink */
radeon_write_dpcd_reg(dp_info->radeon_connector,
@@ -744,7 +744,7 @@ static int radeon_dp_link_train_cr(struct
radeon_dp_link_train_info *dp_info)
memset(dp_info->train_set, 0, 4);
radeon_dp_update_vs_emph(dp_info);
- udelay(800);
+ udelay(200);
/* clock recovery loop */
clock_recovery = false;</pre>
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