On Wed, 23 Oct 2024, Clint Taylor <[email protected]> wrote:
> C10 phy timeouts occur on xe3lpd if the c10 bus is reset every
> transaction. Starting with xe3lpd this is bus reset not necessary
>
> Signed-off-by: Clint Taylor <[email protected]>
> ---
>  drivers/gpu/drm/i915/display/intel_cx0_phy.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c 
> b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> index c1357bdb8a3b..a8966a7a9927 100644
> --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> @@ -224,7 +224,8 @@ static int __intel_cx0_read_once(struct intel_encoder 
> *encoder,
>        * down and let the message bus to end up
>        * in a known state
>        */
> -     intel_cx0_bus_reset(encoder, lane);
> +     if ((DISPLAY_VER(i915) >= 30))

Drop the extra braces.

> +             intel_cx0_bus_reset(encoder, lane);
>  
>       return REG_FIELD_GET(XELPDP_PORT_P2M_DATA_MASK, val);
>  }
> @@ -313,7 +314,8 @@ static int __intel_cx0_write_once(struct intel_encoder 
> *encoder,
>        * down and let the message bus to end up
>        * in a known state
>        */
> -     intel_cx0_bus_reset(encoder, lane);
> +     if ((DISPLAY_VER(i915) >= 30))

Ditto.

BR,
Jani.


> +             intel_cx0_bus_reset(encoder, lane);
>  
>       return 0;
>  }

-- 
Jani Nikula, Intel

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