[PATCH 5/6] drm/i915: Set max cdclk for display 30.02

[Matt Roper]

On Tue, Jun 03, 2025 at 11:54:29PM +0530, Dnyaneshwar Bhadane wrote:
> From: Matt Atwood <matthew.s.atwood at intel.com>
> 
> Display version 30.02 has a lower max cdclk rate then 30.00.
> 
> Bspec: 68861
> Signed-off-by: Matt Atwood <matthew.s.atwood at intel.com>
> Signed-off-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane at intel.com>

Reviewed-by: Matt Roper <matthew.d.roper at intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_cdclk.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
> index f0c673e40ce5..4625c9cea4b2 100644
> --- a/drivers/gpu/drm/i915/display/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
> @@ -3385,7 +3385,9 @@ static int intel_compute_max_dotclk(struct intel_display *display)
>   */
>  void intel_update_max_cdclk(struct intel_display *display)
>  {
> -	if (DISPLAY_VER(display) >= 30) {
> +	if (DISPLAY_VERx100(display) >= 3002) {
> +		display->cdclk.max_cdclk_freq = 480000;
> +	} else if (DISPLAY_VER(display) >= 30) {
>  		display->cdclk.max_cdclk_freq = 691200;
>  	} else if (display->platform.jasperlake || display->platform.elkhartlake) {
>  		if (display->cdclk.hw.ref == 24000)
> -- 
> 2.34.1
> 
> 

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