Re: i915 driver on Minnow board - 1920x1200 resolution not working

From: Jani Nikula <jani.nikula@linux.intel.com>
To: vinoth eswaran <evinoth1206@gmail.com>
Cc: intel-gfx@lists.freedesktop.org, "Syrjala,
	Ville" <ville.syrjala@intel.com>
Subject: Re: i915 driver on Minnow board - 1920x1200 resolution not working
Date: Tue, 21 Jun 2016 17:50:20 +0300	[thread overview]
Message-ID: <87bn2ua95f.fsf@intel.com> (raw)
In-Reply-To: <CAJst-kFCmQp6Vwy5erKXMF--BTprw4BJph1rcxD8wjEDgO7xww@mail.gmail.com>

On Tue, 21 Jun 2016, vinoth eswaran <evinoth1206@gmail.com> wrote:
> On Tue, Jun 21, 2016 at 12:54 PM, Jani Nikula
> <jani.nikula@linux.intel.com> wrote:
>> On Tue, 21 Jun 2016, vinoth eswaran <evinoth1206@gmail.com> wrote:
>>> On Tue, Jun 21, 2016 at 11:35 AM, Jani Nikula
>>> <jani.nikula@linux.intel.com> wrote:
>>>> On Tue, 21 Jun 2016, vinoth eswaran <evinoth1206@gmail.com> wrote:
>>>>> On Tue, Jun 21, 2016 at 10:17 AM, Jani Nikula
>>>>> <jani.nikula@linux.intel.com> wrote:
>>>>>> On Tue, 21 Jun 2016, vinoth eswaran <evinoth1206@gmail.com> wrote:
>>>>>>> Hello,
>>>>>>>
>>>>>>> I am currently working on an embedded project using Minnowboard max. I
>>>>>>> have builded a customized Linux kernel-v4.4 and using u-boot (latest
>>>>>>> version) as Boot loader.
>>>>>>>
>>>>>>> The VESA driver in the u-boot takes more time to initialize,so I have
>>>>>>> disabled it. I am passing the kernel parameters "video=" to enable the
>>>>>>> HDMI port to which a monitor is connected.
>>>>>>
>>>>>> Is is a DVI display?
>>>>>        Its an LED Monitor - LG 24EB23.
>>>>> The monitor supports the HD resolution.
>>>>
>>>> How do you connect the display? Is it HDMI directly or using the DVI
>>>> connector?
>>>>
>>>    Sorry initially I got the question wrongly.
>>> Micro HDMI connector to the board and then HDMI-DVI cable to connect
>>> to the monitor.
>>
>> Single link DVI is limited to 165 Mhz. It *might* work with CVT and
>> reduced blanking. Please try video=HDMI-A-1:1920x1200@60RMD as the mode.
>>
>> I'm surprised the display doesn't report that via EDID to begin with;
>> what does it do without the video parameter on the command line?
>
>     The display is not coming up now. Also without no video parameter,
> the display is not coming up.
> I checked the status of card-0* in /sys/class/drm all the three
> connectors are listed as disconnected.
>
> I have attached the drm driver logs for your reference.

Gets too noisy to debug here. Please file a bug at [1].

BR,
Jani.

[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

-- 
Jani Nikula, Intel Open Source Technology Center
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