On 02.05.23 03:07, Adam Ford wrote:
> According to Table 13-45 of the i.MX8M Mini Reference Manual, the min
> and max values for M and the frequency range for the VCO_out
> calculator were incorrect. This information was contradicted in other
> parts of the mini, nano and plus manuals. After reaching out to my
> NXP Rep, when confronting him about discrepencies in the Nano manual,
> he responded with:
> "Yes it is definitely wrong, the one that is part
> of the NOTE in MIPI_DPHY_M_PLLPMS register table against PMS_P,
> PMS_M and PMS_S is not correct. I will report this to Doc team,
> the one customer should be take into account is the Table 13-40
> DPHY PLL Parameters and the Note above."
>
> These updated values also match what is used in the NXP downstream
> kernel.
>
> To fix this, make new variables to hold the min and max values of m
> and the minimum value of VCO_out, and update the PMS calculator to
> use these new variables instead of using hard-coded values to keep
> the backwards compatibility with other parts using this driver.
>
> Fixes: 4d562c70c4dc ("drm: bridge: samsung-dsim: Add i.MX8M Mini/Nano support")
> Signed-off-by: Adam Ford <aford173@xxxxxxxxx>
> Reviewed-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Tested-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Tested on Kontron BL i.MX8MM with SN65DSI84 and ADV7535 bridges.
Tested-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
Reviewed-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
