On 8/8/19 14:18, Marek Szyprowski wrote:
> M2M scaler clocks require special handling of their parent bus clock during
> power domain on/off sequences. MSCL clocks were not initially added to the
> sub-CMU handler, because that time there was no driver for the M2M scaler
> device and it was not possible to test it.
>
> This patch fixes this issue. Parent clock for M2M scaler devices is now
> properly preserved during MSC power domain on/off sequence. This gives M2M
> scaler devices proper performance: fullHD XRGB32 image 1000 rotations test
> takes 3.17s instead of 45.08s.
>
> Fixes: b06a532bf1fa ("clk: samsung: Add Exynos5 sub-CMU clock driver")
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Acked-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Stephen, could you apply this patch directly to clk-fixes, on top of
my patches:
[v2,2/2] clk: samsung: exynos5800: Move MAU subsystem clocks to MAU sub-CMU
[v2,1/2] clk: samsung: Change signature of exynos5_subcmus_init() function
? Regression that these 3 patches are fixing is not new, it has been
introduced much earlier than 5.3-rc1, however it's quite serious and it
would be good to have the fixes already in 5.3 release.
If that's your preference I will just queue these patches for coming
merge window.
--
Thanks,
Sylwester
