> -----Original Message-----
> From: Intel-xe <[email protected]> On Behalf Of Ville
> Syrjala
> Sent: Wednesday, July 15, 2026 5:39 PM
> To: [email protected]
> Cc: [email protected]
> Subject: [PATCH 2/4] drm/i915/cdclk: Introduce HAS_2PPC()
>
> From: Ville Syrjälä <[email protected]>
>
> We'll need to check for the "does the platform do 2 pixels per clock?"
> thing in a few places. Add a feature macro for it.
>
> Signed-off-by: Ville Syrjälä <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_cdclk.c | 2 +-
> drivers/gpu/drm/i915/display/intel_display_device.h | 1 +
> 2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c
> b/drivers/gpu/drm/i915/display/intel_cdclk.c
> index 1d7ff2cbaebb..12bb6c414683 100644
> --- a/drivers/gpu/drm/i915/display/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
> @@ -2910,7 +2910,7 @@ intel_set_cdclk_post_plane_update(struct
> intel_atomic_state *state)
> /* pixels per CDCLK */
> int intel_cdclk_ppc(struct intel_display *display, bool double_wide) {
> - return DISPLAY_VER(display) >= 10 || double_wide ? 2 : 1;
> + return HAS_2PPC(display) || double_wide ? 2 : 1;
> }
>
> /* max pixel rate as % of CDCLK (not accounting for PPC) */ diff --git
> a/drivers/gpu/drm/i915/display/intel_display_device.h
> b/drivers/gpu/drm/i915/display/intel_display_device.h
> index 9aeba329b9bd..7121e7cd9512 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_device.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_device.h
> @@ -146,6 +146,7 @@ struct intel_display_platforms {
> func(supports_tv);
>
> #define HAS_128B_Y_TILING(__display) (!(__display)->platform.i915g
> && !(__display)->platform.i915gm)
> +#define HAS_2PPC(__display) (DISPLAY_VER(__display) >= 10)
> #define HAS_4TILE(__display) ((__display)->platform.dg2 ||
> DISPLAY_VER(__display) >= 14)
> #define HAS_ASYNC_FLIPS(__display) (DISPLAY_VER(__display) >= 5)
> #define HAS_AS_SDP(__display) (DISPLAY_VER(__display) >=
> 13)
> --
LGTM,
Reviewed-by: Nemesa Garg <[email protected]>
> 2.54.0
