Hi Biju,
Thank you for the patch.
On Wed, Mar 09, 2022 at 03:11:08PM +0000, Biju Das wrote:
> On Renesas RZ/{G2L,V2L} platforms changing the lanes from 4 to 3 at
> lower frequencies causes display instability. On such platforms, it
> is better to avoid switching lanes from 4 to 3 as it needs different
> set of PLL parameter constraints to make the display stable with 3
> lanes.
Is this because the PLL calculation code doesn't work properly, or
because the hardware can't support this ?
> This patch introduces 'adi,disable-lanes-override' property to disable
> lane switching at lower frequencies.
>
> Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/display/bridge/adi,adv7533.yaml | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
> index f36209137c8a..2dc378039d21 100644
> --- a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
> @@ -84,6 +84,11 @@ properties:
> timings for HDMI output.
> type: boolean
>
> + adi,disable-lanes-override:
> + description:
> + Disables the overriding lanes at lower frequencies.
> + type: boolean
> +
> adi,dsi-lanes:
> description: Number of DSI data lanes connected to the DSI host.
> $ref: /schemas/types.yaml#/definitions/uint32
--
Regards,
Laurent Pinchart
