[PATCH] drm/i915: Skip programming FIA link enable bits for MTL+

[Matt Roper]

On Tue, Jun 25, 2024 at 05:26:52PM -0300, Gustavo Sousa wrote:
> Starting with Xe_LPDP, support for Type-C connections is provided by

Drive-by nitpick:  In human-readable text like comments and commit
messages, the official name of the IP is "Xe_LPD+."  We only need to
replace the "+" with a "P" in code identifiers where a symbol wouldn't
be legal.


Matt

> PICA and programming PORT_TX_DFLEXDPMLE1(*) registers is not applicable
> anymore. Those registers don't even exist in recent display IPs. As
> such, skip programming them.
> 
> Bspec: 65750, 65448
> Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_tc.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
> index 9887967b2ca5..6f2ee7dbc43b 100644
> --- a/drivers/gpu/drm/i915/display/intel_tc.c
> +++ b/drivers/gpu/drm/i915/display/intel_tc.c
> @@ -393,6 +393,9 @@ void intel_tc_port_set_fia_lane_count(struct intel_digital_port *dig_port,
>  	bool lane_reversal = dig_port->saved_port_bits & DDI_BUF_PORT_REVERSAL;
>  	u32 val;
>  
> +	if (DISPLAY_VER(i915) >= 14)
> +		return;
> +
>  	drm_WARN_ON(&i915->drm,
>  		    lane_reversal && tc->mode != TC_PORT_LEGACY);
>  
> -- 
> 2.45.2
> 

-- 
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation