On Sunday 07 October 2018 03:08 PM, Jernej Skrabec wrote:

Video PLL factors can be set in a way that final PLL rate is outside
stable range. H6 user manual specifically says that N factor should not
be below 12. While it doesn't says anything about maximum stable rate, it

Manual says "In application, PLL_FACTOR_N should be more than or equal 
to 11" can't it be 11?

is clear that PLL doesn't work at 6.096 GHz (254 * 24 MHz).

Set minimum allowed PLL video rate to 288 MHz (12 * 24 MHz) and maximum
to 2.4 GHz, which is maximum in BSP driver.

Is this max freq from here [1]

[1] 
https://github.com/Allwinner-Homlet/H6-BSP4.9-linux/blob/master/drivers/clk/sunxi/clk-sun50iw6.c#L164