[PATCH v2] drm/i915: Bump max TMDS bitrate to 6 Gbps on ADL-S/ADL-P/DG2+

[Jani Nikula]

On Mon, 20 May 2024, Ville Syrjala <ville.syrjala at linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Bspec lists the mas TMDS bitrate as 6 Gbps on ADL-S/ADL-P/DG2.
> Bump our limit to match.
>
> v2: Bump for ADL-S as well (Jani)
>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Jani Nikula <jani.nikula at intel.com>


> ---
>  drivers/gpu/drm/i915/display/intel_hdmi.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index 0faf2afa1c09..9ac670a40bc1 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -1784,7 +1784,9 @@ static int intel_hdmi_source_max_tmds_clock(struct intel_encoder *encoder)
>  	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
>  	int max_tmds_clock, vbt_max_tmds_clock;
>  
> -	if (DISPLAY_VER(dev_priv) >= 10)
> +	if (DISPLAY_VER(dev_priv) >= 13 || IS_ALDERLAKE_S(dev_priv))
> +		max_tmds_clock = 600000;
> +	else if (DISPLAY_VER(dev_priv) >= 10)
>  		max_tmds_clock = 594000;
>  	else if (DISPLAY_VER(dev_priv) >= 8 || IS_HASWELL(dev_priv))
>  		max_tmds_clock = 300000;

-- 
Jani Nikula, Intel