[Intel-xe] [PATCH 40/42] drm/i915/lnl: Add support to check c10 phy link rate

[Matt Roper]

On Wed, Aug 23, 2023 at 10:07:38AM -0700, Lucas De Marchi wrote:
> From: Ravi Kumar Vodapalli <ravi.kumar.vodapalli at intel.com>
> 
> Add support to check c10 phy link rate for LNL in
> intel_c10_phy_check_hdmi_link_rate() function.

If it turns out the LNL tables from the previous patch aren't necessary,
then we should be able to drop this one as well.


Matt

> 
> BSpec: 68862
> Signed-off-by: Ravi Kumar Vodapalli <ravi.kumar.vodapalli at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_cx0_phy.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> index c8da6985c179..d9c43f3b4f34 100644
> --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> @@ -2137,11 +2137,16 @@ static const struct intel_c20pll_state * const mtl_c20_hdmi_tables[] = {
>  	NULL,
>  };
>  
> -static int intel_c10_phy_check_hdmi_link_rate(int clock)
> +static int intel_c10_phy_check_hdmi_link_rate(struct drm_i915_private *i915, int clock)
>  {
> -	const struct intel_c10pll_state * const *tables = mtl_c10_hdmi_tables;
> +	const struct intel_c10pll_state * const *tables;
>  	int i;
>  
> +	if (DISPLAY_VER(i915) >= 20)
> +		tables = lnl_c10_hdmi_tables;
> +	else
> +		tables = mtl_c10_hdmi_tables;
> +
>  	for (i = 0; tables[i]; i++) {
>  		if (clock == tables[i]->clock)
>  			return MODE_OK;
> @@ -2414,7 +2419,7 @@ int intel_cx0_phy_check_hdmi_link_rate(struct intel_hdmi *hdmi, int clock)
>  	enum phy phy = intel_port_to_phy(i915, dig_port->base.port);
>  
>  	if (intel_is_c10phy(i915, phy))
> -		return intel_c10_phy_check_hdmi_link_rate(clock);
> +		return intel_c10_phy_check_hdmi_link_rate(i915, clock);
>  	return intel_c20_phy_check_hdmi_link_rate(clock);
>  }
>  
> -- 
> 2.40.1
> 

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