On 08/02/17 16:08, Jyri Sarha wrote: > Let's disable all scaling that requires horizontal decimation with > higher factor than 4, until we have better estimates of what we can > and can not do. However, NV12 color format appears to work Ok with > all decimation factors. > > When decimating horizontally by more that 4 the dss is not able to > fetch the data in burst mode. When this happens it is hard to tell if > there enough bandwidth. Despite what theory says this appears to be > true also for 16-bit color formats. > > Signed-off-by: Jyri Sarha <jsarha@xxxxxx> > --- > Chnages since first version: > - "color_mode_to_bpp(color_mode) > 8" -> "color_mode != OMAP_DSS_COLOR_NV12" > - commit message and comment updated too > - improve error print > > drivers/gpu/drm/omapdrm/dss/dispc.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) Thanks, I've picked this up. Tomi
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