[PATCH v4 1/4] clk: sunxi-ng: a64: force select PLL_MIPI in TCON0 mux

[Maxime Ripard]

On Fri, May 05, 2023 at 07:21:07AM +0200, Roman Beranek wrote:
> TCON0's source clock can be fed from either PLL_MIPI, or PLL_VIDEO0(2X),
> however MIPI DSI output only seems to work when PLL_MIPI is selected and
> thus the choice must be hardcoded in.
> 
> Currently, this driver can't propagate rate change from N-K-M clocks
> (such as PLL_MIPI) upwards. This prevents PLL_VIDEO0 from participating
> in setting of the TCON0 data clock rate, limiting the precision with
> which a target pixel clock can be matched.
> 
> For outputs with fixed TCON0 divider, that is DSI and LVDS, the dotclock
> can deviate up to 8% off target.
> 
> Signed-off-by: Roman Beranek <me at crly.cz>

Acked-by: Maxime Ripard <maxime at cerno.tech>

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 228 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20230510/2b164de6/attachment.sig>