[lkml]   [2016]   [Sep]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 6/6] ARM: da850: adjust memory settings for tilcdc
2016-09-29 21:07 GMT+02:00 Karl Beldan <>:
> 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 <>
>> [1];a=commitdiff;h=b9bd39a34cc02c3ba2fc15539a2f0bc2b68d25da;hp=6f6c795faa6366a4ebc1037a0235edba6018a991
>> Signed-off-by: Bartosz Golaszewski <>
>> ---
> FWIW, the quirks could be applied conditionnally depending on the lcdc
> node presence in the DT, a bit like:
> 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.
Thanks for the info!

Best regards,
Bartosz Golaszewski

 \ /
  Last update: 2016-09-30 11:32    [W:1.016 / U:0.172 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site