14:44 <digetx> lucaceresoli: registers can be accessed directly, see https://github.com/digetx/picasso_upstream_support/blob/4.7-downstream-video/drivers/staging/tegra/media/tegra_v4l2_camera.c

18:01 <lucaceresoli> digetx: thanks. I see, and also the mainline staging tegra210 uses writel_relaxed()

18:01 <lucaceresoli> digetx: my initial attempt at using devmem2 failed despite having the clock enabled. Maybe I was missing a power supply or something else. I'll check next week.

18:03 <cyndis> FWIW, the MMIO transactions will still go through host1x so host1x has to be clocked as well.

18:04 <cyndis> in general, the things to check are clocks, resets, and power domains

18:08 <digetx> ah, yeah, I thought question was about using host1x's CDMA.. host1x and etc must be powered on, but you'll get it all automatically if you'll write a proper kernel driver and DT