Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1493992

Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc

Show all headers | View raw

On Fri, Sep 30, 2016 at 9:31 AM, Bartosz Golaszewski
<bgolaszewski@baylibre.com> wrote:
> 2016-09-29 21:07 GMT+02:00 Karl Beldan <karl.beldan@gmail.com>:
>> Hi,
>>
>> On Thu, Sep 29, 2016 at 06:31:55PM +0200, Bartosz Golaszewski wrote:
>>> Default memory settings of da850 do not meet the throughput/latency
>>> requirements of tilcdc. This results in the image displayed being
>>> incorrect and the following warning being displayed by the LCDC
>>> drm driver:
>>>
>>>   tilcdc da8xx_lcdc.0: tilcdc_crtc_irq(0x00000020): FIFO underfow
>>>
>>> Reconfigure the LCDC priority to the highest. This is a workaround
>>> for the da850-lcdk board which has the LCD controller enabled in
>>> the device tree, but a long-term, system-wide fix is needed for
>>> all davinci boards.
>>>
>>> This patch has been modified for mainline linux. It comes from a
>>> downstream TI release for da850[1].
>>>
>>> Original author: Vishwanathrao Badarkhe, Manish <manishv.b@ti.com>
>>>
>>> [1] http://arago-project.org/git/projects/linux-davinci.git?p=projects/linux-davinci.git;a=commitdiff;h=b9bd39a34cc02c3ba2fc15539a2f0bc2b68d25da;hp=6f6c795faa6366a4ebc1037a0235edba6018a991
>>>
>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>>> ---
>>
>> FWIW, the quirks could be applied conditionnally depending on the lcdc
>> node presence in the DT, a bit like:
>> https://github.com/kbeldan/linux/commit/cf15572ffef8e8a0d8110b3f6b29bd401d0538be
>> https://github.com/kbeldan/linux/commit/07e4fff9958bc1625a96791dce284c163fbe9c43
>>
>>
>> Regards,
>> Karl
>
> Hi Karl,
>
> I decided to post the simplest possible way of this to get the lcdc
> working upstream. In parallel I'm working on a system-wide way of
> applying such quirks not only limited to device tree nodes' presence.

Ok, that'd be a good thing, apparently people have been looking
to do such a thing for the am335x as well.

Regards,
Karl

> Thanks for the info!
>
> Best regards,
> Bartosz Golaszewski

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-09-29 18:40 +0200
  Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Karl Beldan <karl.beldan@gmail.com> - 2016-09-29 21:10 +0200
    Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-09-30 11:40 +0200
      Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Karl Beldan <karl.beldan@gmail.com> - 2016-09-30 11:40 +0200
  Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-09-30 15:10 +0200
    Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-09-30 17:10 +0200
      Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-09-30 21:30 +0200
        Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Sekhar Nori <nsekhar@ti.com> - 2016-10-01 11:30 +0200
          Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-10-03 09:20 +0200
            Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Kevin Hilman <khilman@baylibre.com> - 2016-10-04 15:10 +0200
              Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-10-05 10:30 +0200
                Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Sekhar Nori <nsekhar@ti.com> - 2016-10-06 20:00 +0200
        Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-10-04 11:30 +0200
          Re: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-10-05 10:10 +0200

csiph-web