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<body><span class="vcard"><a class="email" href="mailto:yangweix.shui@intel.com" title="shui yangwei <yangweix.shui@intel.com>"> <span class="fn">shui yangwei</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW mobile Acer notebook] eDP can't light up in boot to text mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65995">bug 65995</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
</td>
<td>NEW
</td>
</tr>
<tr>
<td style="text-align:right;">Assignee</td>
<td>tprevite@gmail.com
</td>
<td>yangweix.shui@intel.com
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW mobile Acer notebook] eDP can't light up in boot to text mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65995#c26">Comment # 26</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW mobile Acer notebook] eDP can't light up in boot to text mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65995">bug 65995</a>
from <span class="vcard"><a class="email" href="mailto:yangweix.shui@intel.com" title="shui yangwei <yangweix.shui@intel.com>"> <span class="fn">shui yangwei</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=85943" name="attach_85943" title="dmesg: eDP can't light up and there's error && call trace">attachment 85943</a> <a href="attachment.cgi?id=85943&action=edit" title="dmesg: eDP can't light up and there's error && call trace">[details]</a></span>
dmesg: eDP can't light up and there's error && call trace
(In reply to <a href="show_bug.cgi?id=65995#c25">comment #25</a>)
<span class="quote">> What happens if you try this patch?
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c
> b/drivers/gpu/drm/i915/intel_dp.c
> index 8c70a83..df49828 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -795,11 +795,6 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> /* Walk through all bpp values. Luckily they're all nicely spaced
> with 2
> * bpc in between. */
> bpp = pipe_config->pipe_bpp;
> - if (is_edp(intel_dp) && dev_priv->vbt.edp_bpp) {
> - DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided
> %i\n",
> - dev_priv->vbt.edp_bpp);
> - bpp = min_t(int, bpp, dev_priv->vbt.edp_bpp);
> - }
>
> for (; bpp >= 6*3; bpp -= 2*3) {
> mode_rate = intel_dp_link_required(adjusted_mode->clock,
> bpp);</span >
Applying this patch on latest -next-queued kernel, this issue also exists. I
append the dmesg here.</pre>
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