On Sun, 04 Jan 2015 20:49:38 +0100 Hans de Goede <hdego...@redhat.com> wrote:
> Hi, > > On 04-01-15 20:19, Michal Suchanek wrote: > > Setting magic 'reserved' hpcr bit on sun5i DEBE seems required for > > smooth HDMI scanout of large frambuffer (eg. 1080p). > > > > This fix comes at the cost of some overall memory bandwidth so it > > might be appropriate to detect a10s and only apply there (and not a13). > > Hmm, Sairhei is the expert on this, adding him to the Cc. Sairhei, what > do you think of the proposed change ? I don't have A10s hardware, so have no idea and can't test anything myself. It would be great to have a better description of what exactly is happening before the patch. And precisely how the patch is helping. A description of the test setup and benchmark numbers would be appreciated. And it would be perfect if somebody else could reproduce the test and confirm the results. I may try to check A20 with the bus width artificially reduced to 16 bits (not a totally unrealistic configuration, since A20-OLinuXino-LIME board exists). If sun5i and sun7i are similar enough, then the magic reserved bit may have some effect there too. But that's a different hardware either way. -- Best regards, Siarhei Siamashka _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
