ARM: tegra: Restore memory arbitration on resume from LP1 on Tegra30+

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The external memory arbitration configuration is getting reset after
memory entering into self-refresh mode, it shall be restored on the
exit. Note that MC_EMEM_ARB_CFG register is shadowed and latching
happens on the EMC timing update. This fixes 2x GPU performance
degradation after resuming from LP1 on Tegra30.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

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Dmitry Osipenko 2018-11-25 00:13:48 +03:00 • committed by Thierry Reding

parent d8f5840992

commit 1c6279b49d

2 changed files with 30 additions and 0 deletions

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9

arch/arm/mach-tegra/iomap.h

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21

arch/arm/mach-tegra/sleep-tegra30.S

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