On Fri, Sep 30, 2016 at 9:31 AM, Bartosz Golaszewski <bgolaszew...@baylibre.com> wrote: > 2016-09-29 21:07 GMT+02:00 Karl Beldan <karl.bel...@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 <manish...@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 <bgolaszew...@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
