On 19 January 2015 at 05:29, Siarhei Siamashka siarhei.siamashka@gmail.com wrote:
On Sun, 04 Jan 2015 20:49:38 +0100 Hans de Goede hdegoede@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.
The result is that with full HD HDMI output lima-memtester cube jumps without the patch and does not jump with the patch. I have only 1 A10s board.
Thanks
Michal